CN110492102A - A kind of electrodes of lithium-ion batteries and preparation method thereof and lithium ion battery - Google Patents
A kind of electrodes of lithium-ion batteries and preparation method thereof and lithium ion battery Download PDFInfo
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- CN110492102A CN110492102A CN201910764159.3A CN201910764159A CN110492102A CN 110492102 A CN110492102 A CN 110492102A CN 201910764159 A CN201910764159 A CN 201910764159A CN 110492102 A CN110492102 A CN 110492102A
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
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- 229910021131 SiyP3−yO12 Inorganic materials 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 6
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- 229910052797 bismuth Inorganic materials 0.000 claims description 6
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 6
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- 230000006872 improvement Effects 0.000 description 2
- SBWRUMICILYTAT-UHFFFAOYSA-K lithium;cobalt(2+);phosphate Chemical compound [Li+].[Co+2].[O-]P([O-])([O-])=O SBWRUMICILYTAT-UHFFFAOYSA-K 0.000 description 2
- ILXAVRFGLBYNEJ-UHFFFAOYSA-K lithium;manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[O-]P([O-])([O-])=O ILXAVRFGLBYNEJ-UHFFFAOYSA-K 0.000 description 2
- XSAOIFHNXYIRGG-UHFFFAOYSA-M lithium;prop-2-enoate Chemical compound [Li+].[O-]C(=O)C=C XSAOIFHNXYIRGG-UHFFFAOYSA-M 0.000 description 2
- 229910001453 nickel ion Inorganic materials 0.000 description 2
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Classifications
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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- H—ELECTRICITY
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- H01M4/02—Electrodes composed of, or comprising, active material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention provides a kind of electrodes of lithium-ion batteries and preparation method thereof and lithium ion battery, belong to technical field of lithium ion, specific technical solution is as follows: a kind of electrodes of lithium-ion batteries, including collector, first, which applies layer of paste and second, applies layer of paste, described first applies at least one surface that layer of paste is coated in collector, described second, which applies layer of paste, is coated in the first surface for applying layer of paste, the first painting layer of paste includes evenly dispersed active material, conductive agent, binder, metallic fiber, the second painting layer of paste includes evenly dispersed active material, conductive agent, binder and fast ion conducting material.The present invention adds metallic fiber in the first painting layer of paste of internal layer in pole piece, fast ion conducting material is added in the second painting layer of paste of outer layer in pole piece, the electron conduction and lithium ion transport performance of pole piece can be improved simultaneously, improve the energy density and power-performance of battery to greatest extent.
Description
Technical field
The invention belongs to technical field of lithium ion more particularly to a kind of electrodes of lithium-ion batteries and preparation method thereof and
Lithium ion battery.
Background technique
Lithium ion battery has the characteristics that energy density is high, has extended cycle life and environmental-friendly, is widely used in moving
In the electronic products such as communication equipment, laptop, digital camera, and possess in new-energy automobile field and energy storage field wide
Application prospect.Current positive (negative) pole piece of lithium ion battery all uses following preparation method: first by positive (negative) pole active matter
Matter and conductive agent, binder and solvent are mixed into slurry, and then slurry is coated on positive (negative) pole collector and is dried, finally
Its roll-in is compacted.
However, requirement of the market to lithium ion battery energy density and power-performance is continuously improved, and energy density and function
Rate performance is a pair of of physics contradiction in lithium ion battery, and the battery design for usually improving energy density frequently can lead to power
The decline of energy, and the battery design for improving power-performance frequently can lead to the reduction of energy density.Theoretically, in battery design
The middle thickness for improving battery pole piece can reduce the accounting of auxiliary material in battery, to improve the energy density of battery.And it is traditional
The electronic conduction of electrodes of lithium-ion batteries relies primarily on the conductive network of conductive agent formation, and lithium ion transport relies primarily on pole piece
Electrolyte in hole is limited to the electron conduction energy limit of conductive agent and the lithium ion transport limit of electrolyte, works as pole
The increase of piece thickness will influence the high rate performance and cycle performance of battery to a certain extent, and especially cathode thickness increases to centainly
It also will increase the security risk of pole piece analysis lithium after degree.Therefore, the raising of the pole piece thickness of lithium ion battery is limited to pole piece
Electronic conduction ability and lithium ion transport ability, to affect the promotion of lithium ion battery energy density.
Common improvement thinking is using the higher conductive agent of electric conductivity and the higher electrolyte of lithium ion conductivity.At present
The conductivity room for promotion of electrolyte is very limited, therefore more ways are to promote the electric conductivity of conductive agent.It is common
Lithium ion battery conductive agent is using conductive carbons such as acetylene blacks, using the better carbon nano-tube material of electric conductivity, graphene, carbon fiber
Equal materials can effectively improve the electron conduction of pole piece, reduces conductive agent dosage, improves the energy density and power of battery
Energy.
Metal is the good conductor of electronics, and electric conductivity is usually more much higher than the electric conductivity of conductive carbon black, therefore has one
It is exactly that the electric conductivity of metal powder enhancing pole piece is added in pole piece that kind, which improves thinking,.Application No. is CN201510791812.7
Chinese invention patent application disclose a kind of metal conductive agent and the lithium ion battery using this kind of conductive agent, make in cathode
With silver, copper, nickel, stainless steel, nickel is silver-plated or powdered or hollow hemisphere shape or spring like the metal conductive agent such as nickel copper facing,
Inhibit the expansion of siliceous negative electrode tab and improves electric conductivity.
However, the complete electrochemical process being related in lithium ion battery charge and discharge includes electronics conduction and ion transmission
Two important processes, Neither of the two can be dispensed, any one process, which is obstructed, can all influence entire charge and discharge process.Therefore, folk prescription
The electron conduction that pole piece is improved in face is also limited the energy density of battery and the improvement of power-performance.
Summary of the invention
The first purpose of this invention is to provide a kind of electrodes of lithium-ion batteries, and the energy that lithium ion battery can be improved is close
Degree, and guarantee that lithium ion battery has good high rate performance and cycle performance.
Second object of the present invention is to provide a kind of preparation method of electrodes of lithium-ion batteries.
Third object of the present invention is to provide a kind of lithium ion battery comprising electrodes of lithium-ion batteries.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of electrodes of lithium-ion batteries, including collector, the first painting layer of paste and second apply layer of paste, and described first, which applies layer of paste, applies
At least one surface of collector is overlayed on, described second, which applies layer of paste, is coated in the first surface for applying layer of paste, and described first applies layer of paste
Including evenly dispersed active material, conductive agent, binder and metallic fiber, the second painting layer of paste includes evenly dispersed work
Property material, conductive agent, binder and fast ion conducting material.
Further, it is described first apply layer of paste with a thickness of 5~300 μm, it is described second apply layer of paste with a thickness of 5~300 μ
m。
Further, the metallic fiber accounts for the 0.01-2% of the first painting layer of paste gross mass, and the active material accounts for first
The 90-99% of layer of paste gross mass is applied, the conductive agent accounts for the 0.1-5% of the first painting layer of paste gross mass, and the binder accounts for first
Apply the 0.5-5% of layer of paste gross mass.
Further, the fast ion conducting material accounts for the 0.01-2% of the second painting layer of paste gross mass, the active material
The 90-99% of the second painting layer of paste gross mass is accounted for, the conductive agent accounts for the 0.1-5% of the second painting layer of paste gross mass, the binder
Account for the 0.5-5% of the second painting layer of paste gross mass.
Further, the metallic fiber includes nickel fiber, aluminum fiber, copper fiber, iron fiber, manganese fiber, cobalt fiber, gold
At least one of fiber, silver fiber, titanium fiber, bismuth fiber.
Further, the average diameter of the metallic fiber is 10nm~2 μm, and average length is 100nm~20 μm.
Further, the fast ion conducting material is Li1+x+yAlx(TimZrnGer)2-xSiyP3-yO12、Li3xLa2/3- xTiO3And Li7-xLa3Zr2-xMxO12At least one of；The Li1+x+yAlx(TimZrnGer)2-xSiyP3-yO12In 0≤x≤2,0
≤ y≤3,0≤m≤1,0≤n≤1,0≤r≤1, m+n+r=1；The Li3xLa2/3-xTiO3In 0 < x < 2/3；The Li7- xLa3Zr2-xMxO12Middle M=Ta or Nb, 0≤x≤2.
Further, the partial size of the fast ion conducting material is between 10nm-2 μm.
A kind of preparation method of electrodes of lithium-ion batteries is measured active material, conductive agent, binder, metal is fine according to the ratio
Dimension and solvent are sufficiently mixed into uniform slurry A, wherein the solid content of the slurry A is 20~80%；Amount will live according to the ratio
Property material, conductive agent, binder, fast ion conducting material and solvent are sufficiently mixed into uniform slurry B, wherein the slurry
The solid content of B is 20~80%；Then slurry A is coated at least one surface of collector, slurry B is coated on slurry
On A coating, 60~150 DEG C of 1~50min of baking, solvent volatilization, then 100~150 DEG C of vacuum bakeouts 4~removing for 24 hours is remaining molten
Agent, finally can be obtained electrodes of lithium-ion batteries by roll process compacting, and the slurry A coating is the first painting layer of paste, slurry B
Coating is the second painting layer of paste；Or active material, conductive agent, binder, metallic fiber and solvent are sufficiently mixed into uniform
Slurry A；Active material, conductive agent, binder, fast ion conducting material and solvent are sufficiently mixed into uniform slurry B；
Then slurry A is coated on collector, 60~150 DEG C of 1~50min of baking, solvent volatilization, then slurry B is coated on slurry A and is applied
On layer, 60~150 DEG C of 1~50min of baking, solvent volatilization, then 100~150 DEG C of vacuum bakeouts 4~for 24 hours, remove residual solvent,
Electrodes of lithium-ion batteries finally can be obtained by roll process compacting, the slurry A coating is the first painting layer of paste, and slurry B is applied
Layer applies layer of paste for second.
A kind of lithium ion battery comprising the electrodes of lithium-ion batteries, including positive plate, negative electrode tab and diaphragm, it is described just
Pole piece and/or negative electrode tab are the electrodes of lithium-ion batteries.
Beneficial effects of the present invention: the present invention adds metallic fiber, In in the first painting layer of paste of internal layer in pole piece
Fast ion conducting material is added in the second painting layer of paste of outer layer in pole piece, the electron conduction and lithium of pole piece can be improved simultaneously
Ion transmission performance improves the energy density and power-performance of battery to greatest extent.First metallic fiber applied in layer of paste can be with
The ohmage for greatly reducing internal layer pole piece, in battery work, current density is increasing from pole piece outer layers towards inner layers, drop
The ohmage of low internal layer pole piece can effectively improve the electron transport ability of entire pole piece；Outer layer applies the fast-ionic conductor material in cream
Material can adsorb the conducting lithium ions simultaneously of the anion in electrolyte, so that the transport number and ionic conductivity of lithium ion are improved,
In battery work, lithium concentration is higher and higher from internal layer outer layers, and the lithium-ion-conducting for improving outer layer pole piece can be mentioned effectively
The lithium ion transport of high entire pole piece.Therefore, the present invention can reduce non-active material (its in addition to positive and negative anodes active material
His material) dosage while, improve the energy density and power-performance of battery to the maximum extent.
Detailed description of the invention
Fig. 1 is pole piece structure schematic diagram.
In figure: 1, collector, 2, first applies layer of paste, and 3, second applies layer of paste.
Specific embodiment
1 the present invention is described further by specific embodiment with reference to the accompanying drawing, following specific embodiments
In, during preparing electrode plates, " stirring, coating, drying and the roll-in " that is related to belongs to the conventional examination of this field
Means are tested, roll-in parameter is generally different according to material and pole piece state difference carries out Field adjustment.Solid content is defined as slurry
Ingredient outside middle removing solvent accounts for the mass fraction of slurry gross mass.
Specific embodiment one
A kind of based lithium-ion battery positive plate, including plus plate current-collecting body 1, first apply layer of paste 2 and second and apply layer of paste 3, and described the
One applies the surface that layer of paste 2 is coated in plus plate current-collecting body 1, and described second, which applies layer of paste 3, is coated in the first surface for applying layer of paste 2,
Described first, which applies layer of paste 2, includes evenly dispersed positive electrode active materials, conductive agent, binder and metallic fiber, and described second applies
Layer of paste 3 includes evenly dispersed positive electrode active materials, conductive agent, binder and fast ion conducting material.
Further, described first the thickness of layer of paste is applied between 5~300 μm；Preferably, the thickness of the first painting layer of paste
Degree is between 5~150 μm.
Further, described second the thickness of layer of paste is applied between 5~300 μm；Preferably, the thickness of the second painting layer of paste
Degree is between 5~150 μm.
Further, the first painting layer of paste and second applies the overall thickness of layer of paste between 10~600 μm.Preferably, institute
It states the first painting layer of paste and second and applies the overall thickness of layer of paste between 10~300 μm.
Further, the metallic fiber accounts for the 0.01-2% of the first painting layer of paste gross mass, and the positive electrode active materials account for
First applies the 90-99% of 2 gross mass of layer of paste, and the conductive agent accounts for the 0.1-5% of 2 gross mass of the first painting layer of paste, the binder
Account for the 0.5-5% of 2 gross mass of the first painting layer of paste.
Further, the fast ion conducting material accounts for the 0.01-2% of the second painting layer of paste gross mass, the positive-active
Material accounts for the 90-99% of 3 gross mass of the second painting layer of paste, and the conductive agent accounts for the 0.1-5% of 3 gross mass of the second painting layer of paste, described
Binder accounts for the 0.5-5% of 3 gross mass of the second painting layer of paste.
Preferably, the metallic fiber can be aluminum fiber, iron fiber, manganese fiber, cobalt fiber, golden fiber, silver fiber, titanium
At least one of fiber, bismuth fiber.
Further, the average diameter of the metallic fiber is 10nm~2 μm, and the average length of the metallic fiber is
100nm~20 μm.Preferably, the average diameter of the metallic fiber is 10~500nm, and the average length of the metallic fiber is
5~20 μm.
Further, the fast ion conducting material is Li1+x+yAlx(TimZrnGer)2-xSiyP3-yO12(0≤x≤2,0
≤ y≤3,0≤m≤1,0≤n≤1,0≤r≤1, m+n+r=1, Nasicon structure), Li3xLa2/3-xTiO3(0 < x < 2/3,
Perovskite structure), Li7-xLa3Zr2-xMxO12At least one of (M=Ta or Nb, 0≤x≤2, garnet structure).
Further, the partial size of the fast-ionic conductor powder is between 10nm-2 μm, it is preferred that the fast-ionic conductor
The partial size of powder is between 10-500nm.
Further, the plus plate current-collecting body is aluminium foil, utter misery aluminium foil, punching aluminium foil, aluminium net or foamed aluminium；The anode
Active material is cobalt acid lithium, lithium nickelate, LiMn2O4, nickel cobalt binary material, nickel-cobalt-manganese ternary material, nickel cobalt aluminium ternary material, phosphorus
Sour iron lithium, lithium manganese phosphate, cobalt phosphate lithium, LiNiPO, phosphoric acid vanadium lithium, lithium ferric manganese phosphate, nickel ion doped, lithium-rich oxidation
At least one of object, ferric metasilicate lithium, manganese silicate of lithium, cobaltous silicate lithium, silicic acid nickel lithium, lithium vanadate；The conductive agent is carbon black, carbon
At least one of nanotube, graphene, carbon fiber；The binder is Kynoar (PVDF), polyacrylonitrile, is modified and gathers
At least one of acrylonitrile.
A kind of preparation method of based lithium-ion battery positive plate, steps are as follows:
Using pulp of lithium ion battery preparation method conventional in the prior art, is measured according to the ratio by positive electrode active materials, led
Electric agent, binder, metallic fiber and solvent are sufficiently mixed into uniform slurry A, wherein the solid content of the slurry A be 20~
80%；Measure according to the ratio positive electrode active materials, conductive agent, binder, fast ion conducting material and solvent are sufficiently mixed into it is equal
Even slurry B, wherein the solid content of the slurry B is 20~80%；Then slurry A is coated in a table of plus plate current-collecting body
On face, slurry B is coated on the coating of slurry A, 80~150 DEG C of 1~50min of baking, solvent volatilization, then by pole piece in vacuum
Lower 100~150 DEG C of bakings 4~remove residual solvent for 24 hours, finally will apply cream compacting by roll process can be obtained lithium-ion electric
Pond positive plate.
Preferably, the solvent is NMP.
Specific embodiment two
A kind of anode plate for lithium ionic cell, including collector 1, first apply layer of paste 2 and second and apply layer of paste 3, and described first applies
Layer of paste 2 is coated in a surface of negative current collector 1, and described second, which applies layer of paste 3, is coated in the first surface for applying layer of paste 2, described
First, which applies layer of paste 2, includes evenly dispersed negative electrode active material, conductive agent, binder and metallic fiber, and described second applies layer of paste 3
Including evenly dispersed negative electrode active material, conductive agent, binder and fast ion conducting material.
Further, described first the thickness of layer of paste is applied between 5~300 μm；Preferably, the thickness of the first painting layer of paste
Degree is between 5~150 μm.
Further, described second the thickness of layer of paste is applied between 5~300 μm；Preferably, the thickness of the second painting layer of paste
Degree is between 5~150 μm.
Further, the first painting layer of paste and second applies the overall thickness of layer of paste between 10~600 μm.Preferably, institute
It states the first painting layer of paste and second and applies the overall thickness of layer of paste between 10~300 μm.
Further, the metallic fiber accounts for the 0.01-2% of the first painting layer of paste gross mass, and the negative electrode active material accounts for
First applies the 90-99% of 2 gross mass of layer of paste, and the conductive agent accounts for the 0.1-5% of 2 gross mass of the first painting layer of paste, the binder
Account for the 0.5-5% of 2 gross mass of the first painting layer of paste.
Further, the fast ion conducting material accounts for the 0.01-2% of the second painting layer of paste gross mass, the negative electrode active
Material accounts for the 90-99% of 3 gross mass of the second painting layer of paste, and the conductive agent accounts for the 0.1-5% of 3 gross mass of the second painting layer of paste, described
Binder accounts for the 0.5-5% of 3 gross mass of the second painting layer of paste.
Preferably, the metallic fiber can be nickel fiber, copper fiber, iron fiber, manganese fiber, cobalt fiber, golden fiber,
At least one of silver fiber, titanium fiber, bismuth fiber.
Further, the average diameter of the metallic fiber is 10nm~2 μm.The average length of the metallic fiber
For 100nm~20 μm.
Preferably, the average diameter of the metallic fiber is 10~500nm.The average length of the metallic fiber is
5~20 μm.
Further, the fast-ionic conductor powder is Li1+x+yAlx(TimZrnGer)2-xSiyP3-yO12(0≤x≤2,0
≤ y≤3,0≤m≤1,0≤n≤1,0≤r≤1, m+n+r=1, Nasicon structure), Li3xLa2/3-xTiO3(0 < x < 2/3,
Perovskite structure), Li7-xLa3Zr2-xMxO12At least one of (M=Ta or Nb, 0≤x≤2, garnet structure).
Further, the partial size of the fast-ionic conductor powder is between 10nm-2 μm, it is preferred that the fast-ionic conductor
The partial size of powder is between 10-500nm.
Preferably, the negative current collector is copper foil, utter misery copper foil, punching copper foil, copper mesh, foam copper, nickel foil, utter misery nickel
Foil, punching nickel foil, nickel screen or nickel foam；The negative electrode active material is graphite, hard charcoal, soft charcoal, carbonaceous mesophase spherules, metatitanic acid
At least one of lithium, nano-silicon negative electrode material, silicon-carbon composite cathode material, the sub- silicium cathode material of oxidation；The conductive agent is
At least one of carbon black, carbon nanotube, graphene, carbon fiber；The binder is Kynoar (PVDF), butylbenzene rubber
Glue (SBR), sodium carboxymethylcellulose (CMC), Sodium Polyacrylate, sodium alginate, Lithium polyacrylate, lithium alginate, polyacrylic acid,
At least one of ethylene acrylic acid co polymer, polyacrylate.
A kind of preparation method of anode plate for lithium ionic cell, steps are as follows:
Using pulp of lithium ion battery preparation method conventional in the prior art, is measured according to the ratio by negative electrode active material, led
Electric agent, binder, metallic fiber and solvent are sufficiently mixed into uniform slurry A, and the solid content of the slurry A is 20~
80%；Measure according to the ratio active material, conductive agent, binder, fast ion conducting material and solvent are sufficiently mixed into it is uniform
The solid content of slurry B, the slurry B are 20~80%；Then slurry A is coated on a surface of negative current collector, 60
~130 DEG C of 1~50min of baking, solvent volatilization, then slurry B are coated on slurry A coating, 60~130 DEG C of baking 1~50min, molten
Agent volatilization, then by pole piece under vacuum 100~150 DEG C baking 4~remove residual solvent for 24 hours, finally by roll process will
Applying cream compacting can be obtained aforementioned electrodes of lithium-ion batteries.
Preferably, the solvent is water.
Specific embodiment three
A kind of based lithium-ion battery positive plate, including collector 1, first apply layer of paste 2 and second and apply layer of paste 3, and described first applies
Layer of paste 2 is coated in two surfaces of plus plate current-collecting body 1, and described second, which applies layer of paste 3, is coated in the first surface for applying layer of paste 2, described
First, which applies layer of paste 2, includes evenly dispersed positive electrode active materials, conductive agent, binder, metallic fiber, and described second applies layer of paste 3
Including evenly dispersed positive electrode active materials, conductive agent, binder and fast ion conducting material.
Further, described first the thickness of layer of paste is applied between 5~300 μm；Preferably, the thickness of the first painting layer of paste
Degree is between 5~150 μm.
Further, described second the thickness of layer of paste is applied between 5~300 μm；Preferably, the thickness of the second painting layer of paste
Degree is between 5~150 μm.
Further, the first painting layer of paste and second applies the overall thickness of layer of paste between 10~600 μm.Preferably, institute
It states the first painting layer of paste and second and applies the overall thickness of layer of paste between 10~300 μm.
Further, the metallic fiber accounts for the 0.01-2% of the first painting layer of paste gross mass, and the positive electrode active materials account for
First applies the 90-99% of 2 gross mass of layer of paste, and the conductive agent accounts for the 0.1-5% of 2 gross mass of the first painting layer of paste, the binder
Account for the 0.5-5% of 2 gross mass of the first painting layer of paste.
Further, the fast ion conducting material accounts for the 0.01-2% of the second painting layer of paste gross mass, the positive-active
Material accounts for the 90-99% of 3 gross mass of the second painting layer of paste, and the conductive agent accounts for the 0.1-5% of 3 gross mass of the second painting layer of paste, described
Binder accounts for the 0.5-5% of 3 gross mass of the second painting layer of paste.
Preferably, the metallic fiber can be aluminum fiber, iron fiber, manganese fiber, cobalt fiber, golden fiber, silver fiber, titanium
At least one of fiber, bismuth fiber.
Further, the average diameter of the metallic fiber is 10nm~2 μm, and the average length of the metallic fiber is
100nm~20 μm.
Preferably, the average diameter of the metallic fiber is 10~500nm, the average length of the metallic fiber is 5~
20μm。
Further, the fast ion conducting material is Li1+x+yAlx(TimZrnGer)2-xSiyP3-yO12(0≤x≤2,0
≤ y≤3,0≤m≤1,0≤n≤1,0≤r≤1, m+n+r=1, Nasicon structure), Li3xLa2/3-xTiO3(0 < x < 2/3,
Perovskite structure), Li7-xLa3Zr2-xMxO12At least one of (M=Ta or Nb, 0≤x≤2, garnet structure).
Further, the partial size of the fast-ionic conductor powder is between 10nm-2 μm, it is preferred that the fast-ionic conductor
The partial size of powder is between 10-500nm.
Preferably, the plus plate current-collecting body is aluminium foil, utter misery aluminium foil, punching aluminium foil, aluminium net or foamed aluminium；The anode is living
Property substance be cobalt acid lithium, lithium nickelate, LiMn2O4, nickel cobalt binary material, nickel-cobalt-manganese ternary material, nickel cobalt aluminium ternary material, phosphoric acid
Iron lithium, lithium manganese phosphate, cobalt phosphate lithium, LiNiPO, phosphoric acid vanadium lithium, lithium ferric manganese phosphate, nickel ion doped, lithium-rich oxide,
At least one of ferric metasilicate lithium, manganese silicate of lithium, cobaltous silicate lithium, silicic acid nickel lithium, lithium vanadate.The conductive agent is carbon black, carbon is received
At least one of mitron, graphene, carbon fiber.The binder is Kynoar (PVDF), polyacrylonitrile, is modified poly- third
At least one of alkene nitrile.
A kind of preparation method of based lithium-ion battery positive plate, steps are as follows:
Using pulp of lithium ion battery preparation method conventional in the prior art, is measured according to the ratio by positive electrode active materials, led
Electric agent, binder, metallic fiber and solvent are sufficiently mixed into uniform slurry A, and the solid content of the slurry A is 20~
80%；Measure according to the ratio positive electrode active materials, conductive agent, binder, fast ion conducting material and solvent are sufficiently mixed into it is equal
The solid content of even slurry B, the slurry B are 20~80%；Then slurry A is coated on to two surfaces of negative current collector
On, 80~150 DEG C of 1~50min of baking, solvent volatilization, then slurry B is coated on slurry A coating, 80~150 DEG C of bakings 1~
50min, solvent volatilization, then by pole piece under vacuum 100~150 DEG C baking 4~remove residual solvent for 24 hours, finally pass through roller
Pressure process, which will apply cream compacting, can be obtained based lithium-ion battery positive plate.
Further, the solvent is NMP.
Specific embodiment four
A kind of anode plate for lithium ionic cell, including collector 1, first apply layer of paste 2 and second and apply layer of paste 3, and described first applies
Layer of paste 2 is coated in two surfaces of negative current collector 1, and described second, which applies layer of paste 3, is coated in the first surface for applying layer of paste 2, described
First, which applies layer of paste 2, includes evenly dispersed negative electrode active material, conductive agent, binder, metallic fiber, and described second applies layer of paste 3
Including evenly dispersed negative electrode active material, conductive agent, binder and fast ion conducting material.
Further, described first the thickness of layer of paste is applied between 5~300 μm；Preferably, the thickness of the first painting layer of paste
Degree is between 5~150 μm.
Further, described second the thickness of layer of paste is applied between 5~300 μm；Preferably, the thickness of the second painting layer of paste
Degree is between 5~150 μm.
Further, the first painting layer of paste and second applies the overall thickness of layer of paste between 10~600 μm.Preferably, institute
It states the first painting layer of paste and second and applies the overall thickness of layer of paste between 10~300 μm.
Further, the metallic fiber accounts for the 0.01-2% of the first painting layer of paste gross mass, and the negative electrode active material accounts for
First applies the 90-99% of 2 gross mass of layer of paste, and the conductive agent accounts for the 0.1-5% of 2 gross mass of the first painting layer of paste, the binder
Account for the 0.5-5% of 2 gross mass of the first painting layer of paste.
Further, the fast ion conducting material accounts for the 0.01-2% of the second painting layer of paste gross mass, the negative electrode active
Material accounts for the 90-99% of 3 gross mass of the second painting layer of paste, and the conductive agent accounts for the 0.1-5% of 3 gross mass of the second painting layer of paste, described
Binder accounts for the 0.5-5% of 3 gross mass of the second painting layer of paste.
Preferably, the metallic fiber can be nickel fiber, copper fiber, iron fiber, manganese fiber, cobalt fiber, golden fiber,
At least one of silver fiber, titanium fiber, bismuth fiber.
Further, the average diameter of the metallic fiber is 10nm~2 μm.The average length of the metallic fiber
For 100nm~20 μm.
Preferably, the average diameter of the metallic fiber is 10~500nm.The average length of the metallic fiber is
5~20 μm.
Further, the fast-ionic conductor powder is Li1+x+yAlx(TimZrnGer)2-xSiyP3-yO12(0≤x≤2,0
≤ y≤3,0≤m≤1,0≤n≤1,0≤r≤1, m+n+r=1, Nasicon structure), Li3xLa2/3-xTiO3(0 < x < 2/3,
Perovskite structure), Li7-xLa3Zr2-xMxO12At least one of (M=Ta or Nb, 0≤x≤2, garnet structure).
Further, the partial size of the fast-ionic conductor powder is between 10nm-2 μm, it is preferred that the fast-ionic conductor
The partial size of powder is between 10-500nm.
Preferably, the negative current collector is copper foil, utter misery copper foil, punching copper foil, copper mesh, foam copper, nickel foil, utter misery nickel
Foil, punching nickel foil, nickel screen or nickel foam.The negative electrode active material is graphite, hard charcoal, soft charcoal, carbonaceous mesophase spherules, metatitanic acid
At least one of lithium, nano-silicon negative electrode material, silicon-carbon composite cathode material, the sub- silicium cathode material of oxidation；The conductive agent is
At least one of carbon black, carbon nanotube, graphene, carbon fiber；The binder is Kynoar (PVDF), butylbenzene rubber
Glue (SBR), sodium carboxymethylcellulose (CMC), Sodium Polyacrylate, sodium alginate, Lithium polyacrylate, lithium alginate, polyacrylic acid,
At least one of ethylene acrylic acid co polymer, polyacrylate.
A kind of preparation method of anode plate for lithium ionic cell, steps are as follows:
Using pulp of lithium ion battery preparation method conventional in the prior art, is measured according to the ratio by negative electrode active material, led
Electric agent, binder, metallic fiber and solvent are sufficiently mixed into uniform slurry A, and the solid content of the slurry A is 20~
80%；Measure according to the ratio negative electrode active material, conductive agent, binder, fast ion conducting material and solvent are sufficiently mixed into it is equal
The solid content of even slurry B, the slurry B are 20~80%；Then slurry A is coated on two surfaces of collector, it will
Slurry B is coated on the coating of slurry A, 60~130 DEG C of 1~50min of baking, solvent volatilization, then by pole piece under vacuum 100~
150 DEG C of bakings 4~remove residual solvent for 24 hours, finally will apply cream compacting by roll process can be obtained negative electrode of lithium ion battery
Piece.
Preferably, the solvent is water.
Below by specific embodiment and comparative example, the present invention is further illustrated.It is arrived used in following the description
Reagent, material and instrument such as not special explanation, are conventional reagent, conventional material and conventional instrument, commercially available
It obtains, related reagent can also be synthesized by conventional synthesis process and be obtained.
1, positive plate M1~M8 is prepared
97 parts of cobalt acid lithiums, 1 part of carbon black, 1 part of PVDF, 1 part of aluminum fiber and 25 parts of nmp solvents are stirred by abundant machinery respectively
It mixes and is configured to the uniform sizing material A1 that solid content is 80%, then respectively by 97 parts of cobalt acid lithiums, 1 part of carbon black, 1 part of PVDF, 1 part
Li1.5Al0.5Ge1.5(PO4)3Powder and 50 parts of nmp solvents by abundant mechanical stirring be configured to solid content be 66.7% it is uniform
Slurry A1 and slurry B1 are successively coated on two surfaces of aluminum foil current collector by slurry B1 by the double-deck coating machine, by existing
There are the 5 section baking ovens (oven temperature is respectively set to 80 DEG C, 90 DEG C, 100 DEG C, 120 DEG C, 130 DEG C) that coating machine is equipped in technology to dry
Dry, time of the pole piece in each section baking oven is 1min, and then by pole piece, 120 DEG C of bakings remove residual solvent for 24 hours under vacuum,
Finally cream compacting will be applied by roll-in；The painting layer of paste that slurry A1 is formed is denoted as the first painting layer of paste, the painting layer of paste note that slurry B1 is formed
Layer of paste is applied for second；Described first applies two surfaces that layer of paste is coated in aluminum foil current collector, and described second, which applies layer of paste, is coated in the
One applies the surface of layer of paste, and regulation coating machine can change the thickness that the first painting layer of paste applies layer of paste with second respectively.Change aluminum fiber
Average diameter and average length, Li1.5Al0.5Ge1.5(PO4)3Powder average grain diameter, first apply layer of paste thickness, the second painting layer of paste
Thickness has obtained a series of positive plate M1~M8.
2. preparing positive plate Z1~Z5
Respectively by 97 parts of cobalt acid lithiums, 1 part of carbon black, 1 part of PVDF, 1 part of aluminum fiber (average diameter 10nm, average length
100nm) and 25 parts of nmp solvents are configured to the uniform sizing material A1 that solid content is 80% by abundant mechanical stirring, then respectively by 97
Part cobalt acid lithium, 1 part of carbon black, 1 part of PVDF, 1 part of Li1.5Al0.5Ge1.5(PO4)3Powder (average grain diameter 100nm) and 50 parts of nmp solvents
It is configured to the uniform sizing material B1 that solid content is 66.7% by abundant mechanical stirring, by the double-deck coating machine by slurry B1 and slurry
A1 is successively coated in aluminum foil current collector, and (oven temperature is respectively set to 5 section baking ovens being equipped with by coating machine in the prior art
80 DEG C, 90 DEG C, 100 DEG C, 120 DEG C, 130 DEG C) drying, time of the pole piece in each section baking oven is 1min, and then pole piece exists
The lower 120 DEG C of bakings of vacuum remove residual solvent for 24 hours, finally will apply cream compacting by roll-in；The painting layer of paste that slurry B1 is formed is denoted as
First applies layer of paste (first applies 50 μm of layer of paste thickness), and the painting layer of paste that slurry A1 is formed is denoted as the second painting layer of paste, and (second applies layer of paste thickness
50 μm of degree).Described first applies two surfaces that layer of paste is coated in aluminum foil current collector, and described second, which applies layer of paste, is coated in the first painting cream
The surface of layer, obtained positive plate are denoted as Z1.
Respectively by 97 parts of cobalt acid lithiums, 1 part of carbon black, 1 part of PVDF, 0.5 part of aluminum fiber (average diameter 10nm, average length
100nm), 0.5 part of Li1.5Al0.5Ge1.5(PO4)3Powder (average grain diameter 100nm) and 25 parts of nmp solvents pass through abundant mechanical stirring
It is configured to the uniform sizing material that solid content is 80%, slurry is coated in aluminum foil current collector by coating machine, is matched by coating machine
Standby 5 section baking ovens (oven temperature is respectively set to 80 DEG C, 90 DEG C, 100 DEG C, 120 DEG C, 130 DEG C) drying, pole piece are dried in each section
Time in case is 1min, and then by pole piece, 120 DEG C of bakings remove residual solvent for 24 hours under vacuum, will finally be applied by roll-in
Cream compacting (gained applies 100 μm of layer of paste thickness), obtained positive plate is denoted as Z2.
Respectively by 97 parts of cobalt acid lithiums, 1 part of carbon black, 1 part of PVDF, 1 part of aluminum fiber (average diameter 10nm, average length
100nm) and 25 parts of nmp solvents are configured to the uniform sizing material that solid content is 80% by abundant mechanical stirring, will by coating machine
Slurry is coated in aluminum foil current collector, by coating machine be equipped with 5 section baking ovens (oven temperature be respectively set to 80 DEG C, 90 DEG C,
100 DEG C, 120 DEG C, 130 DEG C) drying, time of the pole piece in each section baking oven is 1min, then by 120 DEG C under vacuum of pole piece
Baking removes residual solvent for 24 hours, finally will apply cream compacting (applying 100 μm of layer of paste thickness) by roll-in, obtained positive plate is denoted as
Z3。
Respectively by 97 parts of cobalt acid lithiums, 1 part of carbon black, 1 part of PVDF, 1 part of Li1.5Al0.5Ge1.5(PO4)3Powder (average grain diameter
100nm) and 25 parts of nmp solvents are configured to the uniform sizing material that solid content is 80% by abundant mechanical stirring, will by coating machine
Slurry is coated in aluminum foil current collector, by coating machine be equipped with 5 section baking ovens (oven temperature be respectively set to 80 DEG C, 90 DEG C,
100 DEG C, 120 DEG C, 130 DEG C) drying, time of the pole piece in each section baking oven is 1min, then by 120 DEG C under vacuum of pole piece
Baking removes residual solvent for 24 hours, finally will apply cream compacting (applying 100 μm of layer of paste thickness) by roll-in, obtained positive plate is denoted as
Z4。
97 parts of cobalt acid lithiums, 2 parts of carbon blacks, 1 part of PVDF and 25 part of nmp solvent are configured to by abundant mechanical stirring respectively solid
Slurry, is coated in aluminum foil current collector by the uniform sizing material that content is 80% by coating machine, is dried by 5 sections that coating machine is equipped with
Case (oven temperature is respectively set to 80 DEG C, 90 DEG C, 100 DEG C, 120 DEG C, 130 DEG C) drying, pole piece in each section baking oven when
Between be 1min, then by pole piece, 120 DEG C of bakings remove residual solvent for 24 hours under vacuum, finally by roll-in will apply cream compacting (painting
100 μm of layer of paste thickness), obtained positive plate is denoted as Z5.
3. preparing positive plate M9~M16
Respectively by 94 parts of LiFePO4s, 1 part of carbon black, 1 part of carbon nanotube, 2 parts of PVDF, 2 parts of aluminum fibers and 40 parts of nmp solvents
It is configured to the uniform sizing material A2 that solid content is 71.4% by abundant mechanical stirring, then respectively by 94 parts of LiFePO4s, 1 part of charcoal
Black, 1 part of carbon nanotube, 2 parts of PVDF, 2 parts of Li7La3Zr2O12Powder and 50 parts of nmp solvents are configured to solid by abundant mechanical stirring
The uniform sizing material B2 that content is 66.7%, is successively coated on utter misery aluminium foil afflux for slurry A2 and slurry B2 by the double-deck coating machine
On body, by coating machine be equipped with 7 section baking ovens (oven temperature be respectively set to 100 DEG C, 110 DEG C, 120 DEG C, 130 DEG C, 130 DEG C,
140 DEG C, 150 DEG C) drying, time of the pole piece in each section baking oven is 5min, then by pole piece 150 DEG C of baking 4h under vacuum
Residual solvent is removed, finally will apply cream compacting by roll-in；The painting layer of paste that slurry A2 is formed is denoted as the first painting layer of paste, slurry B2 shape
At painting layer of paste be denoted as the second painting layer of paste；Described first applies two surfaces that layer of paste is coated in utter misery aluminum foil current collector, and described the
Two, which apply layer of paste, is coated in the first surface for applying layer of paste, and regulation coating machine can change the first painting layer of paste respectively and apply layer of paste with second
Thickness.Change the average diameter and average length, Li of aluminum fiber7La3Zr2O12Powder average grain diameter, first apply layer of paste thickness, the
Two painting layer of paste thickness have obtained a series of positive plate M9~M16.
4. preparing positive plate Z6~Z10
Respectively by 94 parts of LiFePO4s, 1 part of carbon black, 1 part of carbon nanotube, 2 parts of PVDF, 2 parts of aluminum fiber (average diameters
30nm, average length 200nm) and 40 parts of nmp solvents by abundant mechanical stirring be configured to solid content be 71.4% homogenate
Expect A2, then respectively by 94 parts of LiFePO4s, 1 part of carbon black, 1 part of carbon nanotube, 2 parts of PVDF, 2 parts of Li7La3Zr2O12Powder is (average
Partial size 10nm) and 50 parts of nmp solvents by abundant mechanical stirring be configured to solid content be 66.7% uniform sizing material B2, by double
Slurry B2 and slurry A2 are successively coated in utter misery aluminum foil current collector by layer coater, and 7 section baking ovens being equipped with by coating machine (dry
Box temperature degree is respectively set to 100 DEG C, 110 DEG C, 120 DEG C, 130 DEG C, 130 DEG C, 140 DEG C, 150 DEG C) it dries, pole piece is dried in each section
Time in case is 5min, and then by pole piece, 150 DEG C of baking 4h remove residual solvent under vacuum, finally will apply cream by roll-in
Compacting；The painting layer of paste that slurry B2 is formed is denoted as the first painting layer of paste (applying 100 μm of layer of paste thickness), and the painting layer of paste that slurry A2 is formed is denoted as
Second applies layer of paste (applying 100 μm of layer of paste thickness), and described first applies two surfaces that layer of paste is coated in utter misery aluminum foil current collector, described
Second, which applies layer of paste, is coated in the first surface for applying layer of paste, and obtained positive plate is denoted as Z6.
Respectively by 94 parts of LiFePO4s, 1 part of carbon black, 1 part of carbon nanotube, 2 parts of PVDF, 1 part of aluminum fiber (average diameter
30nm, average length 200nm), 1 part of Li7La3Zr2O12Powder (average grain diameter 10nm) and 50 parts of nmp solvents pass through sufficiently mechanical
Stirring is configured to the uniform sizing material that solid content is 66.7%, and slurry is coated in utter misery aluminum foil current collector by coating machine, passes through
Cross coating machine outfit 7 section baking ovens (oven temperature be respectively set to 100 DEG C, 110 DEG C, 120 DEG C, 130 DEG C, 130 DEG C, 140 DEG C,
150 DEG C) drying, time of the pole piece in each section baking oven is 5min, and then by pole piece, 150 DEG C of baking 4h removings are residual under vacuum
Remaining solvent finally will apply cream compacting (applying 200 μm of layer of paste thickness) by roll-in, and obtained positive plate is denoted as Z7.
Respectively by 94 parts of LiFePO4s, 1 part of carbon black, 1 part of carbon nanotube, 2 parts of PVDF, 2 parts of aluminum fiber (average diameters
30nm, average length 200nm) and 40 parts of nmp solvents by abundant mechanical stirring be configured to solid content be 71.4% homogenate
Slurry, is coated in utter misery aluminum foil current collector by material by coating machine, the 7 section baking ovens (oven temperature point being equipped with by coating machine
Be not set as 100 DEG C, 110 DEG C, 120 DEG C, 130 DEG C, 130 DEG C, 140 DEG C, 150 DEG C) drying, pole piece in each section baking oven when
Between be 5min, then by pole piece, 150 DEG C of baking 4h remove residual solvent under vacuum, finally will apply cream compacting (painting by roll-in
200 μm of layer of paste thickness), obtained positive plate is denoted as Z8.
Respectively by 94 parts of LiFePO4s, 1 part of carbon black, 1 part of carbon nanotube, 2 parts of PVDF, 2 parts of Li7La3Zr2O12Powder is (average
Partial size 10nm) and 50 parts of nmp solvents by abundant mechanical stirring be configured to solid content be 66.7% uniform sizing material, pass through coating
Slurry is coated in utter misery aluminum foil current collector by machine, and (oven temperature is respectively set to 100 to 7 section baking ovens being equipped with by coating machine
DEG C, 110 DEG C, 120 DEG C, 130 DEG C, 130 DEG C, 140 DEG C, 150 DEG C) drying, time of the pole piece in each section baking oven be 5min, so
By pole piece, 150 DEG C of baking 4h remove residual solvent under vacuum afterwards, finally will apply cream compacting by roll-in and (apply 200 μ of layer of paste thickness
M), the positive plate obtained is denoted as Z9.
94 parts of LiFePO4s, 3 parts of carbon blacks, 1 part of carbon nanotube, 2 parts of PVDF and 50 part of nmp solvents are passed through into abundant machine respectively
Tool stirring is configured to the uniform sizing material that solid content is 66.7%, and slurry is coated in utter misery aluminum foil current collector by coating machine,
(oven temperature is respectively set to 100 DEG C, 110 DEG C, 120 DEG C, 130 DEG C, 130 DEG C, 140 to 7 section baking ovens being equipped with by coating machine
DEG C, 150 DEG C) drying, time of the pole piece in each section baking oven be 5min, then by pole piece, 150 DEG C of baking 4h are removed under vacuum
Residual solvent is removed, finally will apply cream compacting (applying 200 μm of layer of paste thickness) by roll-in, obtained positive plate is denoted as Z10.
5. preparing positive plate M17~M24
Respectively by 96 parts of nickel-cobalt-manganese ternary materials, 1.99 parts of carbon nanotubes, 2 parts of PVDF, 0.01 part of silver fiber and 80 parts of NMP
Solvent is configured to the uniform sizing material A3 that solid content is 55.6% by abundant mechanical stirring, then respectively by 95 parts of nickel-cobalt-manganese ternary materials
Material, 2.99 parts of carbon blacks, 2 parts of PVDF, 0.01 part of Li0.5La0.5TiO3Powder and 100 parts of nmp solvents are matched by abundant mechanical stirring
The uniform sizing material B3 that solid content is 50% is made, slurry A3 and slurry B3 are successively coated on by foamed aluminium collection by the double-deck coating machine
On fluid, (oven temperature is respectively set to 90 DEG C, 100 DEG C, 110 DEG C, 120 DEG C, 120 to 5 section baking ovens being equipped with by coating machine
DEG C) drying, time of the pole piece in each section baking oven is 10min, and then by pole piece, 100 DEG C of baking 12h removings are residual under vacuum
Remaining solvent finally will apply cream compacting by roll-in；The painting layer of paste that slurry A3 is formed is denoted as the first painting layer of paste, the painting that slurry B3 is formed
Layer of paste is denoted as the second painting layer of paste；Described first applies two surfaces that layer of paste is coated in foamed aluminium collector, and described second applies layer of paste
The surface for applying layer of paste coated in first, regulation coating machine can change the thickness that the first painting layer of paste applies layer of paste with second respectively.Change
Become the average diameter and average length, Li of silver fiber0.5La0.5TiO3Powder average grain diameter, first apply layer of paste thickness, the second painting cream
Thickness degree has obtained a series of positive plate M17~M24.
6. preparing positive plate Z11~Z15
Respectively by 96 parts of nickel-cobalt-manganese ternary materials, 1.99 parts of carbon nanotubes, 2 parts of PVDF, 0.01 part of silver fiber (average diameter
10nm, 1 μm of average length) and 80 parts of nmp solvents by abundant mechanical stirring be configured to solid content be 55.6% uniform sizing material
A3, then respectively by 95 parts of nickel-cobalt-manganese ternary materials, 2.99 parts of carbon blacks, 2 parts of PVDF, 0.01 part of Li0.5La0.5TiO3Powder is (average
Partial size 12nm) and 100 parts of nmp solvents by abundant mechanical stirring be configured to solid content be 50% uniform sizing material B3, by double
Slurry B3 and slurry A3 are successively coated on foamed aluminium collector by layer coater, 5 section baking oven (baking ovens being equipped with by coating machine
Temperature is respectively set to 90 DEG C, 100 DEG C, 110 DEG C, 120 DEG C, 120 DEG C) drying, time of the pole piece in each section baking oven is
10min, then by pole piece, 100 DEG C of baking 12h remove residual solvent under vacuum, finally will apply cream compacting by roll-in；Slurry
The painting layer of paste that B3 is formed is denoted as the first painting layer of paste (applying 150 μm of layer of paste thickness), and the painting layer of paste that slurry A3 is formed is denoted as the second painting cream
Layer (applies 150 μm of layer of paste thickness), and described first applies two surfaces that layer of paste is coated in foamed aluminium collector, and described second applies layer of paste
The surface for applying layer of paste coated in first, obtained positive plate are denoted as Z11.
Respectively by 95 parts of nickel-cobalt-manganese ternary materials, 2.98 parts of carbon blacks, 2 parts of PVDF, 0.01 part of silver fiber (average diameter
10nm, 1 μm of average length), 0.01 part of Li0.5La0.5TiO3Powder (average grain diameter 12nm) and 100 parts of nmp solvents pass through abundant
Mechanical stirring is configured to the uniform sizing material that solid content is 50%, and slurry is coated on foamed aluminium collector by coating machine, passes through
Cross 5 section baking ovens (oven temperature is respectively set to 90 DEG C, 100 DEG C, 110 DEG C, the 120 DEG C, 120 DEG C) drying of coating machine outfit, pole
Time of the piece in each section baking oven is 10min, and then by pole piece, 100 DEG C of baking 12h remove residual solvent under vacuum, finally
Cream compacting (applying 300 μm of layer of paste thickness) will be applied by roll-in, obtained positive plate is denoted as Z12.
Respectively by 96 parts of nickel-cobalt-manganese ternary materials, 1.99 parts of carbon nanotubes, 2 parts of PVDF, 0.01 part of silver fiber (average diameter
10nm, 1 μm of average length) and 80 parts of nmp solvents by abundant mechanical stirring be configured to solid content be 55.6% uniform sizing material,
Slurry is coated on foamed aluminium collector by coating machine, (oven temperature is respectively set 5 section baking ovens being equipped with by coating machine
It is 90 DEG C, 100 DEG C, 110 DEG C, 120 DEG C, 120 DEG C) drying, time of the pole piece in each section baking oven is 10min, then by pole
100 DEG C of baking 12h remove residual solvent to piece under vacuum, finally will apply cream compacting (applying 300 μm of layer of paste thickness) by roll-in, and obtain
To positive plate be denoted as Z13.
Respectively by 95 parts of nickel-cobalt-manganese ternary materials, 2.99 parts of carbon blacks, 2 parts of PVDF, 0.01 part of Li0.5La0.5TiO3Powder is (flat
Equal partial size 12nm) and 100 parts of nmp solvents solid content is configured to as 50% uniform sizing material by abundant mechanical stirring, pass through painting
Slurry is coated on foamed aluminium collector by cloth machine, and (oven temperature is respectively set to 90 to 5 section baking ovens being equipped with by coating machine
DEG C, 100 DEG C, 110 DEG C, 120 DEG C, 120 DEG C) drying, time of the pole piece in each section baking oven be 10min, then pole piece is existed
The lower 100 DEG C of baking 12h of vacuum remove residual solvent, finally will apply cream compacting (applying 300 μm of layer of paste thickness) by roll-in, and obtain
Positive plate is denoted as Z14.
95 parts of nickel-cobalt-manganese ternary materials, 3 parts of carbon blacks, 2 parts of PVDF and 100 part of nmp solvents are stirred by abundant machinery respectively
It mixes and is configured to the uniform sizing material that solid content is 50%, slurry is coated on foamed aluminium collector by coating machine, by coating
5 section baking ovens (oven temperature is respectively set to 90 DEG C, 100 DEG C, 110 DEG C, the 120 DEG C, 120 DEG C) drying that machine is equipped with, pole piece is every
Time in one section baking oven is 10min, and then by pole piece, 100 DEG C of baking 12h remove residual solvent under vacuum, finally passes through roller
Pressure will apply cream compacting (applying 300 μm of layer of paste thickness), and obtained positive plate is denoted as Z15.
7. preparing negative electrode tab N1~N8
Respectively by 95.5 parts of nano-silicon negative electrode materials, 2 parts of carbon nanotubes, 1 part of Lithium polyacrylate, 1 part of SBR, 0.5 part of copper fibre
300 parts of water of peacekeeping are configured to the uniform sizing material A4 that solid content is 25% by abundant mechanical stirring, then respectively by 95.5 parts of nanometers
Silicium cathode material, 2 parts of carbon nanotubes, 1 part of Lithium polyacrylate, 1 part of SBR, 0.5 part of Li1.4Al0.4Ti1.6(PO4)3Powder and 400 parts
Water is configured to the uniform sizing material B4 that solid content is 20% by abundant mechanical stirring, and slurry A4 is first coated on copper by coating machine
On foil collector and by coating machine be equipped with 5 section baking ovens (oven temperature be respectively set to 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C,
130 DEG C) drying, time of the pole piece in each section baking oven is 0.5min, then slurry B4 is coated on A4 and is applied in layer of paste, by applying
5 section baking ovens (oven temperature is respectively set to 60 DEG C, 80 DEG C, 100 DEG C, the 120 DEG C, 130 DEG C) drying that cloth machine is equipped with, pole piece is every
Time in one section baking oven is 0.5min, and then by pole piece, 100 DEG C of bakings remove residual solvent for 24 hours under vacuum, finally pass through
Roll-in will apply cream compacting；The painting layer of paste that slurry A4 is formed is denoted as the first painting layer of paste, and the painting layer of paste that slurry B4 is formed is denoted as the second painting
Layer of paste, described first applies two surfaces that layer of paste is coated in copper foil current collector, and described second, which applies layer of paste, is coated in the first painting layer of paste
Surface.Regulation coating machine can change the thickness that the first painting layer of paste applies layer of paste with second respectively.Change the average straight of copper fiber
Diameter and average length, Li1.4Al0.4Ti1.6(PO4)3Powder average grain diameter, the first painting layer of paste thickness, the second painting layer of paste thickness obtain
A series of negative electrode tab N1~N8.
8. preparing negative electrode tab F1~F5
Respectively by 95.5 parts of nano-silicon negative electrode materials, 2 parts of carbon nanotubes, 1 part of Lithium polyacrylate, 1 part of SBR, 0.5 part of copper fibre
Dimension (average diameter 10nm, average length 100nm) and 300 parts of water by abundant mechanical stirring be configured to solid content for 25% it is equal
Homogenate material A4, then respectively by 95.5 parts of nano-silicon negative electrode materials, 2 parts of carbon nanotubes, 1 part of Lithium polyacrylate, 1 part of SBR, 0.5 part
Li1.4Al0.4Ti1.6(PO4)3Powder (average grain diameter 100nm) and 400 parts of water are configured to solid content by abundant mechanical stirring and are
20% uniform sizing material B4,5 sections that first slurry B4 is coated in copper foil current collector by coating machine and is equipped with by coating machine
Baking oven (oven temperature is respectively set to 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, 130 DEG C) drying, pole piece is in each section baking oven
Time is 0.5min, then slurry A4 is coated on 5 section baking ovens (the oven temperature difference that B4 is applied in layer of paste and is equipped with by coating machine
It is set as 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, 130 DEG C) drying, time of the pole piece in each section baking oven is 0.5min, then
By pole piece, 100 DEG C of bakings remove residual solvent for 24 hours under vacuum, finally will apply cream compacting by roll-in.Slurry B4 forms first
It applies layer of paste (applying 5 μm of layer of paste thickness), slurry A4 forms second painting layer of paste (applying 5 μm of layer of paste thickness) the first painting layer of paste and is coated in
Two surfaces of copper foil current collector, described second, which applies layer of paste, is coated in the first surface for applying layer of paste, and obtained positive plate is denoted as F1.
Respectively by 95.5 parts of nano-silicon negative electrode materials, 2 parts of carbon nanotubes, 1 part of Lithium polyacrylate, 1 part of SBR, 0.25 part of copper
Fiber (average diameter 10nm, average length 100nm), 0.25 part of Li1.4Al0.4Ti1.6(PO4)3Powder (average grain diameter 100nm) and
300 parts of water are configured to the uniform sizing material that solid content is 25% by abundant mechanical stirring, and slurry is coated on copper by coating machine
On foil collector, by coating machine be equipped with 5 section baking ovens (oven temperature be respectively set to 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C,
130 DEG C) drying, time of the pole piece in each section baking oven is 0.5min, and then by pole piece, 100 DEG C of bakings remove for 24 hours under vacuum
Residual solvent is removed, finally will apply cream compacting (applying 10 μm of layer of paste thickness) by roll-in.Obtained negative electrode tab is denoted as F2.
Respectively by 95.5 parts of nano-silicon negative electrode materials, 2 parts of carbon nanotubes, 1 part of Lithium polyacrylate, 1 part of SBR, 0.5 part of copper fibre
Dimension (average diameter 10nm, average length 100nm) and 300 parts of water by abundant mechanical stirring be configured to solid content for 25% it is equal
Slurry, is coated in copper foil current collector by homogenate material by coating machine, the 5 section baking ovens (oven temperature point being equipped with by coating machine
It is not set as 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, 130 DEG C) drying, time of the pole piece in each section baking oven is 0.5min, so
By pole piece, 100 DEG C of bakings remove residual solvent for 24 hours under vacuum afterwards, finally will apply cream compacting by roll-in and (apply 10 μ of layer of paste thickness
M), the negative electrode tab obtained is denoted as F3.
Respectively by 95.5 parts of nano-silicon negative electrode materials, 2 parts of carbon nanotubes, 1 part of Lithium polyacrylate, 1 part of SBR, 0.5 part
Li1.4Al0.4Ti1.6(PO4)3Powder (average grain diameter 100nm) and 300 parts of water are configured to solid content by abundant mechanical stirring and are
Slurry is coated in copper foil current collector by 25% uniform sizing material by coating machine, and 5 section baking ovens being equipped with by coating machine (dry
Box temperature degree is respectively set to 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, 130 DEG C) drying, time of the pole piece in each section baking oven is
0.5min, then by pole piece, 100 DEG C of bakings remove residual solvent for 24 hours under vacuum, finally will apply cream compacting by roll-in and (apply cream
10 μm of thickness degree), obtained negative electrode tab is denoted as F4.
Respectively by 95.5 parts of nano-silicon negative electrode materials, 2.5 parts of carbon nanotubes, 1 part of Lithium polyacrylate, 1 part SBR and 300 part
Water is configured to the uniform sizing material that solid content is 25% by abundant mechanical stirring, and slurry is coated on copper foil afflux by coating machine
On body, dried by the 5 section baking ovens (oven temperature is respectively set to 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, 130 DEG C) that coating machine is equipped with
Dry, time of the pole piece in each section baking oven is 0.5min, and then by pole piece, 100 DEG C of bakings removing for 24 hours is remaining molten under vacuum
Agent finally will apply cream compacting (applying 10 μm of layer of paste thickness) by roll-in, and obtained negative electrode tab is denoted as F5.
9. preparing negative electrode tab N9~N16
Respectively by 97 parts of graphite cathode materials, 0.5 part of carbon black, 0.7 part of CMC, 0.8 part of SBR, 1 part of nickel fiber and 60 parts of water
It is configured to the uniform sizing material A5 that solid content is 62.5% by abundant mechanical stirring, then respectively by 97 parts of graphite cathode materials, 0.5
Part carbon black, 0.7 part of CMC, 0.8 part of SBR, 1 part of Li6.4La3Zr1.4Ta0.6O12Powder and 90 parts of water are prepared by abundant mechanical stirring
The uniform sizing material B5 for being 52.6% at solid content, is successively coated on utter misery copper foil for slurry A5 and slurry B5 by the double-deck coating machine
On collector, (oven temperature is respectively set to 90 DEG C, 100 DEG C, 100 DEG C, 110 DEG C, 110 to 5 section baking ovens being equipped with by coating machine
DEG C) drying, time of the pole piece in each section baking oven is 3min, and then by pole piece, 150 DEG C of baking 4h remove remnants under vacuum
Solvent finally will apply cream compacting by roll-in；The painting layer of paste that slurry A5 is formed is denoted as the first painting layer of paste, the painting cream that slurry B5 is formed
Layer is denoted as the second painting layer of paste；Described first applies two surfaces that layer of paste is coated in utter misery copper foil current collector, and described second applies layer of paste
The surface for applying layer of paste coated in first, regulation coating machine can change the thickness that the first painting layer of paste applies layer of paste with second respectively.Change
Become the average diameter and average length, Li of nickel fiber6.4La3Zr1.4Ta0.6O12Powder average grain diameter, first apply layer of paste thickness, the
Two painting layer of paste thickness have obtained a series of negative electrode tab N9~N16.
10. preparing negative electrode tab F6~F10
Respectively by 97 parts of graphite cathode materials, 0.5 part of carbon black, 0.7 part of CMC, 0.8 part of SBR, 1 part of nickel fiber (average diameter
30nm, average length 200nm) and 60 parts of water by abundant mechanical stirring be configured to solid content be 62.5% uniform sizing material A5,
Again respectively by 97 parts of graphite cathode materials, 0.5 part of carbon black, 0.7 part of CMC, 0.8 part of SBR, 1 part of Li6.4La3Zr1.4Ta0.6O12Powder
(average grain diameter 10nm) and 90 parts of water are configured to the uniform sizing material B5 that solid content is 52.6% by abundant mechanical stirring, by double
Slurry B5 and slurry A5 are successively coated in utter misery copper foil current collector by layer coater, and 5 section baking ovens being equipped with by coating machine (dry
Box temperature degree is respectively set to 90 DEG C, 100 DEG C, 100 DEG C, 110 DEG C, 110 DEG C) drying, time of the pole piece in each section baking oven is
3min, then by pole piece, 150 DEG C of baking 4h remove residual solvent under vacuum, finally will apply cream compacting by roll-in.Slurry B5
First is formed to apply layer of paste (applying 65 μm of layer of paste thickness), slurry A5 forms second and applies layer of paste (applying 65 μm of layer of paste thickness), and described first
Two surfaces that layer of paste is coated in copper foil current collector are applied, described second, which applies layer of paste, is coated in the first surface for applying layer of paste, obtains
Negative electrode tab is denoted as F6.
It is respectively that 97 parts of graphite cathode materials, 0.5 part of carbon black, 0.7 part of CMC, 0.8 part of SBR, 0.5 part of nickel fiber is (average straight
Diameter 30nm, average length 200nm), 0.5 part of Li6.4La3Zr1.4Ta0.6O12Powder (average grain diameter 10nm) and 90 parts of water are by filling
Point mechanical stirring is configured to the uniform sizing material that solid content is 52.6%, and slurry is coated on utter misery copper foil current collector by coating machine
On, it is dried by the 5 section baking ovens (oven temperature is respectively set to 90 DEG C, 100 DEG C, 100 DEG C, 110 DEG C, 110 DEG C) that coating machine is equipped with
Dry, time of the pole piece in each section baking oven is 3min, and then by pole piece, 150 DEG C of baking 4h remove residual solvent under vacuum,
Finally cream compacting (applying 130 μm of layer of paste thickness) will be applied by roll-in.Obtained negative electrode tab is denoted as F7.
Respectively by 97 parts of graphite cathode materials, 0.5 part of carbon black, 0.7 part of CMC, 0.8 part of SBR, 1 part of nickel fiber (average diameter
30nm, average length 200nm) and 90 parts of water by abundant mechanical stirring be configured to solid content be 52.6% uniform sizing material, lead to
It crosses coating machine slurry is coated in utter misery copper foil current collector, (oven temperature is respectively set 5 section baking ovens being equipped with by coating machine
It is 90 DEG C, 100 DEG C, 100 DEG C, 110 DEG C, 110 DEG C) drying, time of the pole piece in each section baking oven is 3min, then by pole piece
150 DEG C of baking 4h remove residual solvent under vacuum, finally will apply cream compacting (applying 130 μm of layer of paste thickness) by roll-in, and obtain
Negative electrode tab be denoted as F8.
Respectively by 97 parts of graphite cathode materials, 0.5 part of carbon black, 0.7 part of CMC, 0.8 part of SBR, 1 part
Li6.4La3Zr1.4Ta0.6O12Powder (average grain diameter 10nm) and 90 parts of water are configured to solid content by abundant mechanical stirring and are
Slurry is coated in utter misery copper foil current collector by 52.6% uniform sizing material by coating machine, is dried by 5 sections that coating machine is equipped with
Case (oven temperature is respectively set to 90 DEG C, 100 DEG C, 100 DEG C, 110 DEG C, 110 DEG C) drying, pole piece in each section baking oven when
Between be 3min, then by pole piece, 150 DEG C of baking 4h remove residual solvent under vacuum, finally will apply cream compacting (painting by roll-in
130 μm of layer of paste thickness), obtained negative electrode tab is denoted as F9.
97 parts of graphite cathode materials, 1.5 parts of carbon blacks, 0.7 part of CMC, 0.8 part of SBR and 90 part of water are passed through into abundant machine respectively
Tool stirring is configured to the uniform sizing material that solid content is 52.6%, and slurry is coated in utter misery copper foil current collector by coating machine,
5 section baking ovens (oven temperature is respectively set to 90 DEG C, 100 DEG C, 100 DEG C, the 110 DEG C, 110 DEG C) drying being equipped with by coating machine,
Time of the pole piece in each section baking oven is 3min, and then by pole piece, 150 DEG C of baking 4h remove residual solvent under vacuum, finally
Cream compacting (applying 130 μm of layer of paste thickness) will be applied by roll-in, obtained negative electrode tab is denoted as F10.
11. preparing negative electrode tab N17~N24
Respectively by the sub- silicium cathode material of 93 parts of oxidations, 0.5 part of carbon black, 3 parts of carbon fibers, 1 part of sodium alginate, 1 part of SBR, 1 part
Lithium polyacrylate, 0.5 part of copper fiber and 100 parts of water are configured to the uniform sizing material that solid content is 50% by abundant mechanical stirring
A6, then respectively gather the sub- silicium cathode material of 93 parts of oxidations, 0.5 part of carbon black, 3 parts of carbon fibers, 1 part of sodium alginate, 1 part of SBR, 1 part
Lithium acrylate, 0.5 part of Li6.75La3Zr1.75Ta0.25O12Powder and 150 parts of water are configured to solid content by abundant mechanical stirring and are
Slurry A6 and slurry B6 is successively coated in punching copper foil current collector, warp by 40% uniform sizing material B6 by the double-deck coating machine
Cross 5 section baking ovens (oven temperature is respectively set to 80 DEG C, 100 DEG C, 100 DEG C, the 100 DEG C, 100 DEG C) drying of coating machine outfit, pole
Time of the piece in each section baking oven is 1min, and then by pole piece, 120 DEG C of baking 8h remove residual solvent under vacuum, is most passed through afterwards
Cream compacting will be applied by crossing roll-in；The painting layer of paste that slurry A6 is formed is denoted as the first painting layer of paste, and the painting layer of paste that slurry B6 is formed is denoted as second
Apply layer of paste；Described first applies two surfaces that layer of paste is coated in punching copper foil current collector, and described second, which applies layer of paste, is coated in first
The surface of layer of paste is applied, regulation coating machine can change the thickness that the first painting layer of paste applies layer of paste with second respectively.Change copper fiber
Average diameter and average length, Li6.75La3Zr1.75Ta0.25O12Powder average grain diameter, first apply layer of paste thickness, the second painting layer of paste
Thickness has obtained a series of negative electrode tab N17~N24.
12. preparing negative electrode tab F11~F15
Respectively by the sub- silicium cathode material of 93 parts of oxidations, 0.5 part of carbon black, 3 parts of carbon fibers, 1 part of sodium alginate, 1 part of SBR, 1 part
Lithium polyacrylate, 0.5 part of copper fiber (average diameter 10nm, 1 μm of average length) and 100 parts of water are prepared by abundant mechanical stirring
The uniform sizing material A6 for being 50% at solid content, then respectively by the sub- silicium cathode material of 93 parts of oxidations, 0.5 part of carbon black, 3 parts of carbon fibers, 1
Part sodium alginate, 1 part of SBR, 1 part of Lithium polyacrylate, 0.5 part of Li6.75La3Zr1.75Ta0.25O12Powder (average grain diameter 12nm) and
150 parts of water are configured to the uniform sizing material B6 that solid content is 40% by abundant mechanical stirring, by the double-deck coating machine by slurry B6
It is successively coated on slurry A6 in punching copper foil current collector, (oven temperature is respectively set to 5 section baking ovens being equipped with by coating machine
80 DEG C, 100 DEG C, 100 DEG C, 100 DEG C, 100 DEG C) drying, time of the pole piece in each section baking oven is 1min, and then pole piece exists
The lower 120 DEG C of baking 8h of vacuum remove residual solvent, finally will apply cream compacting by roll-in；The painting layer of paste that slurry B6 is formed is denoted as the
One applies layer of paste (applying 45 μm of layer of paste thickness), and the painting layer of paste that slurry A6 is formed is denoted as the second painting layer of paste (applying 45 μm of layer of paste thickness), institute
Two surfaces that the first painting layer of paste is coated in punching copper foil current collector are stated, described second, which applies layer of paste, is coated in the first table for applying layer of paste
Face, obtained negative electrode tab are denoted as F11.
Respectively by the sub- silicium cathode material of 93 parts of oxidations, 0.5 part of carbon black, 3 parts of carbon fibers, 1 part of sodium alginate, 1 part of SBR, 1 part
Lithium polyacrylate, 0.25 part of copper fiber (average diameter 10nm, 1 μm of average length), 0.25 part of Li6.75La3Zr1.75Ta0.25O12Powder
Body (average grain diameter 12nm) and 100 parts of water are configured to the uniform sizing material that solid content is 50% by abundant mechanical stirring, pass through painting
Slurry is coated in punching copper foil current collector by cloth machine, and (oven temperature is respectively set to 80 to 5 section baking ovens being equipped with by coating machine
DEG C, 100 DEG C, 100 DEG C, 100 DEG C, 100 DEG C) drying, time of the pole piece in each section baking oven be 1min, then by pole piece true
Empty lower 120 DEG C of baking 8h remove residual solvent, finally will apply cream compacting (applying 90 μm of layer of paste thickness), obtained cathode by roll-in
Piece is denoted as F12.
Respectively by the sub- silicium cathode material of 93 parts of oxidations, 0.5 part of carbon black, 3 parts of carbon fibers, 1 part of sodium alginate, 1 part of SBR, 1 part
Lithium polyacrylate, 0.5 part of copper fiber (average diameter 10nm, 1 μm of average length) and 100 parts of water are prepared by abundant mechanical stirring
Slurry is coated in punching copper foil current collector by coating machine, is matched by coating machine by the uniform sizing material for being 50% at solid content
Standby 5 section baking ovens (oven temperature is respectively set to 80 DEG C, 100 DEG C, 100 DEG C, 100 DEG C, 100 DEG C) drying, pole piece is in each section
Time in baking oven is 1min, and then by pole piece, 120 DEG C of baking 8h remove residual solvent under vacuum, will finally be applied by roll-in
Cream compacting (applies 90 μm of layer of paste thickness), and obtained negative electrode tab is denoted as F13.
Respectively by the sub- silicium cathode material of 93 parts of oxidations, 0.5 part of carbon black, 3 parts of carbon fibers, 1 part of sodium alginate, 1 part of SBR, 1 part
Lithium polyacrylate, 0.5 part of Li6.75La3Zr1.75Ta0.25O12Powder (average grain diameter 12nm) and 100 parts of water are stirred by abundant machinery
It mixes and is configured to the uniform sizing material that solid content is 50%, slurry is coated in punching copper foil current collector by coating machine, by applying
5 section baking ovens (oven temperature is respectively set to 80 DEG C, 100 DEG C, 100 DEG C, the 100 DEG C, 100 DEG C) drying that cloth machine is equipped with, pole piece exist
Time in each section baking oven is 1min, and then by pole piece, 120 DEG C of baking 8h remove residual solvent under vacuum, finally passes through roller
Pressure will apply cream compacting (applying 90 μm of layer of paste thickness), and obtained negative electrode tab is denoted as F14.
The sub- silicium cathode material of 93 parts of oxidations, 1 part of carbon black, 3 parts of carbon fibers, 1 part of sodium alginate, 1 part of SBR, 1 part are gathered respectively
Lithium acrylate and 100 parts of water are configured to the uniform sizing material that solid content is 50% by abundant mechanical stirring, will be starched by coating machine
Material is coated in punching copper foil current collector, and (oven temperature is respectively set to 80 DEG C, 100 to 5 section baking ovens being equipped with by coating machine
DEG C, 100 DEG C, 100 DEG C, 100 DEG C) drying, time of the pole piece in each section baking oven be 1min, then under vacuum by pole piece
120 DEG C of baking 8h remove residual solvent, finally will apply cream compacting (applying 90 μm of layer of paste thickness) by roll-in, obtained negative electrode tab note
For F15.
By conventional polyethylene-alumina ceramic coating diaphragm (the wherein polyvinyl of above-mentioned positive plate and negative electrode tab collocation
10 μm of material thickness, alumina ceramic layer overall thickness be 4 μm), traditional lithium-ion battery electrolyte be prepared into lithium ion battery.Test
Battery energy density, multiplying power charging performance and multiplying power discharging property, battery short circuit rate, test result are as shown in table 1.
Table 1
The performance test data of embodiment and comparative example from table 1 is it is found that the lithium-ion electric prepared using the method for the present invention
Pond pole piece is for that can promote energy density, high rate performance and the cycle performance of lithium ion battery in lithium ion battery.
According to Examples 1 to 4, embodiment 9~12, the performance comparison of embodiment 17~20 it is found that metallic fiber diameter
Smaller, length is longer, and to promote effect to battery performance better.
According to embodiment 5 and 6 performance comparison of embodiment, embodiment 15 and 16 performance comparison of embodiment, embodiment 21 and real
Apply 22 performance comparison of example it is found that in a certain range the partial size of fast-ionic conductor powder it is smaller to battery performance promoted effect get over
It is good.
In addition, according to comparative example 1~3, comparative example 6~8, the data of comparative example 11~13 in table it is found that if applying cream
Outer layer (far from collector side) contains metallic fiber, once metallic fiber is exposed to pole piece, it is short to greatly increase battery
The probability on road is unfavorable for promoting the yield in battery production.And the internal layer that metallic fiber is in painting cream in pole piece in the present invention (leans on
Nearly collector side) position, outer layer, which applies, does not contain metallic fiber in cream, this design can bring a significant benefit, be exactly
The probability for significantly reducing battery short circuit, to promote the yield of battery.This is the subsidiary another technical effect of design of the invention.
Claims (10)
1. a kind of electrodes of lithium-ion batteries, it is characterised in that: apply layer of paste (2) and second including collector (1), first and apply layer of paste
(3), described first at least one surface that layer of paste (2) are coated in collector (1) is applied, described second, which applies layer of paste (3), is coated in the
One applies the surface of layer of paste (2), and first painting layer of paste (2) includes evenly dispersed active material, conductive agent, binder and metal
Fiber, the second painting layer of paste includes evenly dispersed active material, conductive agent, binder and fast ion conducting material.
2. a kind of electrodes of lithium-ion batteries according to claim 1, it is characterised in that: described first applies the thickness of layer of paste (2)
Degree be 5~300 μm, it is described second apply layer of paste (3) with a thickness of 5~300 μm.
3. a kind of electrodes of lithium-ion batteries according to claim 1, it is characterised in that: the metallic fiber accounts for the first painting cream
The 0.01-2% of layer (2) gross mass, the active material account for the 90-99% of first painting layer of paste (2) gross mass, and the conductive agent accounts for
First applies the 0.1-5% of layer of paste (2) gross mass, and the binder accounts for the 0.5-5% of first painting layer of paste (2) gross mass.
4. a kind of electrodes of lithium-ion batteries according to claim 3, it is characterised in that: the fast ion conducting material accounts for
Two apply the 0.01-2% of layer of paste (3) gross mass, and the active material accounts for the 90-99% of second painting layer of paste (3) gross mass, described to lead
Electric agent accounts for the 0.1-5% of second painting layer of paste (3) gross mass, and the binder accounts for the 0.5-5% of second painting layer of paste (3) gross mass.
5. a kind of electrodes of lithium-ion batteries according to claim 1, it is characterised in that: the metallic fiber includes nickel fibre
Dimension, aluminum fiber, copper fiber, iron fiber, manganese fiber, cobalt fiber, golden fiber, silver fiber, titanium fiber, at least one in bismuth fiber
Kind.
6. a kind of electrodes of lithium-ion batteries according to claim 1, it is characterised in that: the average diameter of the metallic fiber
For 10nm~2 μm, average length is 100nm~20 μm.
7. a kind of electrodes of lithium-ion batteries according to claim 1, it is characterised in that: the fast ion conducting material is
Li1+x+yAlx(TimZrnGer)2-xSiyP3-yO12、Li3xLa2/3-xTiO3And Li7-xLa3Zr2-xMxO12At least one of；It is described
Li1+x+yAlx(TimZrnGer)2-xSiyP3-yO12In 0≤x≤2,0≤y≤3,0≤m≤1,0≤n≤1,0≤r≤1, m+n+r=
1；The Li3xLa2/3-xTiO3In 0 < x < 2/3；The Li7-xLa3Zr2-xMxO12Middle M=Ta or Nb, 0≤x≤2.
8. a kind of electrodes of lithium-ion batteries according to claim 6, it is characterised in that: the grain of the fast ion conducting material
Diameter is between 10nm-2 μm.
9. a kind of preparation method of electrodes of lithium-ion batteries as claimed in claim 4, it is characterised in that: measured according to the ratio by active material
Material, conductive agent, binder, metallic fiber and solvent are sufficiently mixed into uniform slurry A, wherein the solid content of the slurry A
It is 20~80%；It measures according to the ratio and is sufficiently mixed into active material, conductive agent, binder, fast ion conducting material and solvent
Uniform slurry B, wherein the solid content of the slurry B is 20~80%；Then slurry A is coated in collector (1) at least
On one surface, slurry B is coated on slurry A coating, dry out solvent, finally by roll process compacting can be obtained lithium from
Sub- battery pole piece, the slurry A coating are the first painting layer of paste (2), and slurry B coating is the second painting layer of paste (3)；Or by active material
Material, conductive agent, binder, metallic fiber and solvent are sufficiently mixed into uniform slurry A；By active material, conductive agent, bonding
Agent, fast ion conducting material and solvent are sufficiently mixed into uniform slurry B；Then slurry A is coated on collector (1),
Dry out solvent, then slurry B is coated on slurry A coating, dry out solvent, finally by roll process compacting can be obtained lithium from
Sub- battery pole piece, the slurry A coating are the first painting layer of paste, and slurry B coating is the second painting layer of paste.
10. a kind of lithium ion battery comprising electrodes of lithium-ion batteries described in claim 1-8 any claim, feature
Be: including positive plate, negative electrode tab and diaphragm, the positive plate and/or negative electrode tab are the electrodes of lithium-ion batteries.
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