CN109888200A - Battery cathode coating, battery cathode sheet and its manufacturing method, lithium ion battery - Google Patents
Battery cathode coating, battery cathode sheet and its manufacturing method, lithium ion battery Download PDFInfo
- Publication number
- CN109888200A CN109888200A CN201811646579.3A CN201811646579A CN109888200A CN 109888200 A CN109888200 A CN 109888200A CN 201811646579 A CN201811646579 A CN 201811646579A CN 109888200 A CN109888200 A CN 109888200A
- Authority
- CN
- China
- Prior art keywords
- battery
- negative electrode
- cathode
- active material
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The present invention is suitable for field of lithium ion battery, disclose battery cathode coating, battery cathode sheet, the manufacturing method of battery cathode sheet, lithium ion battery, wherein, the component of battery cathode coating includes negative electrode active material, cathode conductive agent, suspending agent and negative electrode binder, and negative electrode active material includes synthetic graphite particles and the hard carbon material layer that is coated on outside synthetic graphite particles.The present invention is due to using the synthetic graphite particles for being coated with hard carbon material as negative electrode active material; therefore; forming protective layer outside synthetic graphite particles using hard carbon material layer prevents the solvent molecule of electrolyte to be embedded into cathode graphite-structure layer; and the conductive characteristic that can be good of hard carbon material, thus be conducive to further promote the cycle performance of lithium ion battery.
Description
Technical field
The present invention relates to field of lithium ion battery more particularly to battery cathode coating, battery cathode sheet, battery cathode sheets
Manufacturing method, lithium ion battery.
Background technique
The negative electrode tab of lithium ion battery generally comprises negative metal substrate and applies coated on the cathode outside negative metal substrate
Layer, the component of cathode coating generally comprise negative electrode active material, cathode conductive agent, suspending agent and negative electrode binder.
In existing lithium ion battery, negative electrode active material generally uses graphite.This lithium ion battery is in concrete application
In, the solvent molecule of electrolyte, which is easy to be embedded into crystal structure of graphite layer with lithium ion, (has occurred " electrolyte solvent point
Sub insertion altogether " reaction), so that cathode graphite laminate structure is wrecked, and then negative pole graphite powder is caused to fall off, so as to cause lithium from
The cycle life of sub- battery shortens.
Summary of the invention
The first purpose of this invention is to provide a kind of battery cathode coating, aims to solve the problem that existing lithium ion battery hair
Raw electrolyte solvent molecule is embedded in the technical issues of causing cycle life of lithium ion battery to shorten altogether.
In order to achieve the above objectives, scheme provided by the invention is: battery cathode coating, and component includes negative electrode active material
Matter, cathode conductive agent, suspending agent and negative electrode binder, the negative electrode active material include synthetic graphite particles and are coated on artificial
Hard carbon material layer outside graphite particle.
Optionally, the battery cathode coating includes the component of following parts by weight: negative electrode active material 94.0%~
97.0%, cathode conductive agent 0.2%~2.2%, suspending agent 1.2%~2.0%, negative electrode binder 1.4%~2.4%.
Optionally, the battery cathode coating includes the component of following parts by weight: negative electrode active material 95.0%, cathode
Conductive agent 1.5%, suspending agent 1.3%, negative electrode binder 2.2%；Alternatively,
The battery cathode coating includes the component of following parts by weight: negative electrode active material 94.0%, cathode conductive agent
1.6%, suspending agent 2.0%, negative electrode binder 2.4%；Alternatively,
The battery cathode coating includes the component of following parts by weight: negative electrode active material 97.0%, cathode conductive agent
0.3%, suspending agent 1.2%, negative electrode binder 1.5%.
Optionally, the hard carbon material layer is made of carbon black；And/or
The cathode conductive agent includes at least one of conductive carbon black, electrically conductive graphite, carbon nanotube；And/or
The negative electrode binder includes sodium carboxymethylcellulose, butadiene-styrene rubber, polyacrylic acid, at least one in sodium alginate
Kind；And/or
The suspending agent is sodium carboxymethylcellulose.
Second object of the present invention is to provide a kind of battery cathode sheet, including negative metal substrate and the cathode
Metal substrate be conductively connected negative electrode lug and coated on the cathode coating outside the negative metal substrate, which is characterized in that it is described
Cathode coating uses above-mentioned battery cathode coating.
Third object of the present invention is to provide a kind of manufacturing method of above-mentioned battery cathode sheet comprising following step
It is rapid:
Suspending agent dry powder is added in deionized water and is mixed, suspending agent glue is made；
Negative electrode active material, cathode conductive agent and 50%~70% suspending agent glue are mixed, are made negative
Pole semi-finished product slurry；
After addition negative electrode binder and the remaining suspending agent glue are mixed in the cathode semi-finished product slurry,
Deionized water is added to continues to mix, negative electrode slurry is made；
The negative electrode slurry is coated on negative metal substrate, cathode is made and coats intermediate products；
Solidification is dried in cathode coating intermediate products, to apply negative electrode slurry dry solidification as battery cathode
Layer is made cathode and solidifies intermediate products；
Roll-in is successively carried out to the anode solidification intermediate products, cuts processing, negative electrode tab semi-finished product are made；
Negative electrode lug is welded on the negative electrode tab semi-finished product, battery cathode sheet is made.
Fourth object of the present invention is to provide a kind of lithium ion battery comprising battery case, battery anode slice,
One diaphragm, the second diaphragm, electrolyte and above-mentioned battery cathode sheet, the battery anode slice, the battery cathode sheet, described
One diaphragm, second diaphragm and the electrolyte are all set in the battery case, and the battery anode slice, the battery
Negative electrode tab, first diaphragm, second diaphragm are all dipped in the electrolyte, and the battery cathode sheet is located at the battery
Between positive plate and the battery case, first diaphragm is set between the battery anode slice and the battery cathode sheet,
Second diaphragm is set between the battery case and the battery cathode sheet.
Optionally, battery anode slice includes cathode metal substrate, the anode ear with cathode metal substrate conductive connection
With the anode coating being coated on outside the cathode metal substrate, the component of the anode coating includes positive electrode active material
Matter, positive electrode binder, positive conductive agent, the median D of the positive active material50For 7mm ± 3 μm.
Optionally, the positive active material includes ternary material LiNixMnyCozO2Particle and it is coated on the ternary material
Expect LiNixMnyCozO2Clad outside particle, wherein 0.5≤x≤0.8,0.1≤y≤0.3,0.1≤z≤0.3, x+y+z=
1.0；
The clad includes MgO, Al2O3、ZrO2、TiO2、AlPO4、AlF3、LiAlO2、LiTiO2At least one of；
Alternatively,
The component of the anode coating includes positive active material, positive electrode binder, positive conductive agent, the anode
Active material includes ternary material LiNixMnyCozO2Particle is doped in the ternary material LiNixMnyCozO2It is intragranular to mix
Miscellaneous element and it is coated on the ternary material LiNixMnyCozO2Clad outside particle, wherein 0.5≤x≤0.8,0.1≤y
≤ 0.3,0.1≤z≤0.3, x+y+z=1.0；
The doped chemical includes at least one of Al, F；
The clad includes MgO, Al2O3、ZrO2、TiO2、AlPO4、AlF3、LiAlO2、LiTiO2At least one of.
Optionally, lithium salt 1.1mol/L~1.3mol/L of the electrolyte；And/or
It include at least one of LiFSI, TMSP in the electrolyte.
The beneficial effects of the present invention are:
Due to using the synthetic graphite particles for being coated with hard carbon material as negative electrode active material, therefore, using hard carbon material
The bed of material forms protective layer outside synthetic graphite particles prevents the solvent molecule of electrolyte to be embedded into cathode graphite-structure layer, and hard
The conductive characteristic that can be good of carbon material, thus it is conducive to the cyclicity for reducing the internal resistance of cell, further promoting lithium ion battery
Can, finally effectively extend the cycle life of lithium ion battery.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of battery cathode sheet provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of battery anode slice provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
It should also be noted that, when an element is referred to as being " fixed " or " disposed " on another element, it can be straight
Connect on the other element or may be simultaneously present centering elements.When an element is known as " connection " another element,
It, which can be, is directly connected to another element or may be simultaneously present centering elements.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to
Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can
It to be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution occurs
Conflicting or cannot achieve when, will be understood that the combination of this technical solution is not present, also not the present invention claims protection model
Within enclosing.
Embodiment one:
As shown in Figs. 1-2, the battery cathode coating 22 that the embodiment of the present invention one provides, component includes negative electrode active material
Matter, cathode conductive agent, suspending agent and negative electrode binder, the negative electrode active material include synthetic graphite particles and are coated on artificial
Hard carbon material layer outside graphite particle.Artificial graphite is using unformed Carbon Materials in N2Through high temperature graphitization (> 2500 in atmosphere
DEG C) and obtain.Hard carbon material is the pyrolytic carbon formed after high molecular polymer thermally decomposes, it is difficult to it is graphitized, conducts electricity very well,
Lithium ion battery internal resistance is reduced and the promotion of cycle performance is helpful, and the solvent molecule of electrolyte can be prevented to be embedded into cathode
In graphite-structure layer.The present embodiment due to using being coated with the synthetic graphite particles of hard carbon material as negative electrode active material, therefore,
Forming protective layer outside synthetic graphite particles using hard carbon material layer prevents the solvent molecule of electrolyte to be embedded into cathode graphite
In structure sheaf, and the conductive characteristic that can be good of hard carbon material, thus be conducive to reduce the internal resistance of cell, further promote lithium ion
The cycle performance of battery finally effectively extends the cycle life of lithium ion battery.
Preferably, the battery cathode coating 22 includes the component of following parts by weight: negative electrode active material 94.0%~
97.0%, cathode conductive agent 0.2%~2.2%, suspending agent 1.2%~2.0%, negative electrode binder 1.4%~2.4%.Herein,
It is optimized by the constituent content to battery cathode coating 22, improves the capacity and battery cathode of battery cathode sheet 2
Adhesive force of the coating 22 on negative metal substrate 21 reduces the resistance of battery cathode sheet 2, and then is conducive to further promote lithium
Capacity, cycle performance and the security performance of ion battery.In addition, the setting of suspending agent, can make to bear in the negative electrode slurry made
Pole conductive agent, negative electrode active material are well dispersed and are in suspended state, ensure that negative electrode slurry following process process is (coated
Journey) stability, avoid cathode conductive agent occur reunite, avoid negative electrode active material from settling.
It is further preferable that the battery cathode coating 22 includes the component of following parts by weight: negative electrode active material
95.0%, cathode conductive agent 1.5%, suspending agent 1.3%, negative electrode binder 2.2%；Alternatively, the battery cathode coating 22 wraps
Include the component of following parts by weight: negative electrode active material 94.0%, cathode conductive agent 1.6%, suspending agent 2.0%, cathode bonding
Agent 2.4%；Alternatively, the battery cathode coating 22 includes the component of following parts by weight: negative electrode active material 97.0%, cathode
Conductive agent 0.3%, suspending agent 1.2%, negative electrode binder 1.5%.Through experimental test it is found that battery cathode coating 22 uses these
The component of parts by weight, 2 capacity of raising battery cathode sheet obtained improve battery cathode coating 22 in negative metal substrate 21
The effect of upper adhesive force and reduction by 2 resistance of battery cathode sheet is all than more significant.
Preferably, the hard carbon material layer is made of carbon black, is difficult to be graphitized, be conducted electricity very well, and can be prevented
The solvent molecule of electrolyte is embedded into cathode graphite-structure layer.
It is further preferable that the hard carbon material layer is made of acetylene black.
Preferably, cathode conductive agent includes at least one of conductive carbon black, electrically conductive graphite, carbon nanotube.Herein, pass through
The material of cathode conductive agent is optimized, conducive to the internal resistance for reducing battery.
It is further preferable that cathode conductive agent includes conductive carbon black Super P, 350G, SP-Li, electrically conductive graphite KS-6, conduction
At least one of graphite SFG-6, Ketjen black ECP, Ketjen black ECP-600JD, carbon nanotube CNT.
Preferably, negative electrode binder include sodium carboxymethylcellulose (CMC), butadiene-styrene rubber (SBR), polyacrylic acid (PAA),
At least one of sodium alginate.Herein, it is optimized by the material to negative electrode binder, is conducive to guarantee battery cathode
Coating 22 and negative metal substrate 21 have good adhesive property.Herein, negative electrode binder is preferably polyacrylic acid.Polypropylene
Acid has long chain structure similar with SBR, therefore its adhesive property is suitable with SBR；Meanwhile possessing carboxyl structure, it can be with
Li+Carboxylic acid lithium group is formed, Li is helped to improve+Conductive performance, therefore pole piece resistance and the internal resistance of cell are smaller, are conducive to electricity
The promotion of pond cycle performance.
Preferably, suspending agent is sodium carboxymethylcellulose (CMC).Herein, suspending agent uses sodium carboxymethylcellulose, in addition to
Cathode conductive agent, negative electrode active material can be made to be in outside suspended state in the negative electrode slurry made, meanwhile, using carboxymethyl
The cementitiousness of sodium cellulosate acts synergistically with negative electrode binder, and it is each to improve battery cathode coating 22 after battery cathode sheet 2 is dried
Adhesive force between component and between battery cathode coating 22 and negative metal substrate 21.
Further, the present embodiment additionally provides a kind of battery cathode sheet 2 comprising negative metal substrate 21, with it is described
Negative metal substrate 21 be conductively connected negative electrode lug 23 and coated on the cathode coating outside the negative metal substrate, the cathode
Coating uses above-mentioned battery cathode coating 23.Battery cathode sheet 2 provided in this embodiment, due to using above-mentioned cathode gold
Belong to substrate 21, therefore improves the stability and cycle life of battery cathode sheet 2.
Preferably, negative metal substrate 21 with a thickness of 8 μm ± 2 μm, battery cathode sheet 2 with a thickness of 147 μm ± 5 μm.
In this way, under the premise of guaranteeing that 2 figure of battery cathode sheet is lesser, conducive to the optimum performance for playing negative electrode active material.It of courses,
In concrete application, the thickness of negative metal substrate 21 and the thickness of battery cathode sheet 2 are without being limited thereto.
Preferably, negative metal substrate 21 is copper foil, can meet the electric conductivity requirement of battery cathode sheet 2, and matter
Amount is light, at low cost.It of courses, in concrete application, the material of negative metal substrate 21 is without being limited thereto.
Further, the present embodiment additionally provides a kind of manufacturing method of battery cathode sheet 2 comprising following steps:
Suspending agent dry powder is added in deionized water and is mixed, suspending agent glue is made；
Negative electrode active material, cathode conductive agent and 50%~70% suspending agent glue are mixed, are made negative
Pole semi-finished product slurry；
After addition negative electrode binder and the remaining suspending agent glue are mixed in the cathode semi-finished product slurry,
Deionized water is added to continues to mix, negative electrode slurry is made；
The negative electrode slurry is coated on negative metal substrate 21, cathode is made and coats intermediate products；
By the cathode coating intermediate products solidification is dried, using by negative electrode slurry dry solidification as battery cathode coating
22, cathode is made and solidifies intermediate products；
Roll-in is successively carried out to the anode solidification intermediate products, cuts processing, negative electrode tab semi-finished product are made；
Negative electrode lug 23 is welded on the negative electrode tab semi-finished product, and battery cathode sheet 2 is made.
In the present embodiment, different amounts of suspending agent glue is added by several times in the preparation process of negative electrode slurry, the method
Advantage is: a part of suspending agent glue is added in early period, so that slurry is in thick, the stirring shearing force of slurry is larger, matches simultaneously
Unify fixed revolving speed and time, obtains material granule fully dispersed；Suspending agent glue is added in later period, cooperate certain revolving speed and
Time mediates powdered main material sufficiently with suspending agent, negative electrode binder and cathode conductive agent, negative electrode slurry dispersion effect
Well, stable slurry system is formed, to be conducive to promote the consistency of lithium ion battery.
Preferably, when different amounts of suspending agent glue being added by several times, mixed revolving speed is different, obtains in this way conducive to material granule
To abundant, quick dispersion.
Further, the present embodiment additionally provides a kind of lithium ion battery comprising battery case (not shown), battery are just
Pole piece 1, the first diaphragm (not shown), the second diaphragm (not shown), electrolyte and above-mentioned battery cathode sheet 2, battery anode slice
1, battery cathode sheet 2, the first diaphragm, the second diaphragm and electrolyte are all set in battery case, and battery anode slice 1, battery are negative
Pole piece 2, the first diaphragm, the second diaphragm are all dipped in electrolyte, battery cathode sheet 2 be located at battery anode slice 1 and battery case it
Between, the first diaphragm is set between battery anode slice 1 and battery cathode sheet 2, and the second diaphragm is set to battery case and battery cathode sheet 2
Between.Lithium ion battery provided in an embodiment of the present invention, due to using above-mentioned battery cathode sheet 2, therefore, improve lithium ion
The stability and cycle life of battery.
Preferably, battery anode slice 1 includes that cathode metal substrate 11 and the cathode metal substrate 11 are conductively connected just
Tab 13 and coated on the anode coating 12 outside the cathode metal substrate 11, the group subpackage of the anode coating 12
Include positive active material, positive electrode binder, positive conductive agent, the median D of the positive active material50For 7mm ± 3 μm.
Its positive active material that middle median is 12 μm ± 1 μm compared with the existing technology, has reached and has effectively reduced positive electrode active material
Matter median D50Purpose, thus be conducive to improve lithium ion battery high voltage 4.35V take off lithium state under positive active material
Stability.Median (being called median particle diameter) D of positive active material50Refer specifically to the cumulative particle sizes point of positive active material
Cloth percentage reaches partial size corresponding when 50%, its physical significance is that partial size is greater than its particle and accounts for 50%, less than it
Particle also accounts for 50%.
Preferably, the positive active material includes ternary material LiNixMnyCozO2Particle and it is coated on the ternary material
Expect LiNixMnyCozO2Clad outside particle, wherein 0.5≤x≤0.8,0.1≤y≤0.3,0.1≤z≤0.3, x+y+z=
1.0；
The clad includes MgO, Al2O3、ZrO2、TiO2、AlPO4、AlF3、LiAlO2、LiTiO2At least one of.
Anode coating 12 provided in this embodiment, using the ternary material LiNi being coated with coating layerxMnyCozO2?
Grain as a positive electrode active material, using ternary material LiNixMnyCozO2The small characteristic of partial size, effectively reduces positive-active
The median of substance, so that the variation of particle volume is smaller under de- lithium state of the positive active material in high voltage 4.35V,
To improve the structural stability of lithium ion battery.Ternary material LiNixMnyCozO2Particle during the charging process, with lithium
Ion is constantly detached from, and the chemical valence of interior metal element also accordingly increases, if not to ternary material LiNixMnyCozO2?
Grain takes any safeguard procedures, ternary material LiNixMnyCozO2Particle easily reacts with electrolyte, so as to cause metal
Ion-solubility, and then will lead to ternary material LiNixMnyCozO2The structure of particle is destroyed；And with charging voltage
It constantly increases, metal ion solution rate is also constantly being accelerated, and the embodiment of the present invention passes through cladding MgO, Al2O3、ZrO2、TiO2、
AlPO4、AlF3、LiAlO2、LiTiO2At least one of, these cladding substances are in ternary material LiNixMnyCozO2Particle surface
A protective layer is formed, so as to avoid cathode metal ion-solubility, ensures that cathode material structure is stable, have metal ion
Dissolution, and then the stability of positive active material structure can be kept in charge and discharge process, finally effectively improve lithium-ion electric
The cycle life in pond.
Preferably, x=0.8, y=0.1, z=0.1；Alternatively, x=0.7, y=0.1, z=0.2；Alternatively, x=0.5, y=
0.2, z=0.3, using ternary material LiNi made from these numerical valuexMnyCozO2Particle can better meet positive electrode active material
The performance requirement of matter, and the median of positive active material can be made smaller.It of courses, in concrete application, x, y, z is taken
Value is not limited to stop, as long as meeting following relationship: 0.5≤x≤0.8,0.1≤y≤0.3,0.1≤z≤0.3, x+y+z=
1.0。
Preferably, the specific surface area 0.4m of positive active material2/ g~0.8m2/g.Herein, the ratio table of positive active material
Area is larger, conducive to the stability for improving positive active material structure.The specific surface area of positive active material refers specifically to unit matter
Measure the gross area possessed by positive active material.
Preferably, the tap density of positive active material is 1.6g/cm3~2.4g/cm3.The vibration density of positive active material
Degree specifically refers to the quality of positive active material unit volume measured after jolt ramming.
Preferably, the gram volume of positive active material is 155mAh/g~175mAh/g.The gram volume of positive active material
Refer to the mass ratio for the capacitance and positive active material that positive active material can release.
Preferably, clad includes at least one of metal oxide, i.e., clad includes MgO, Al2O3、ZrO2、
TiO2At least one of, in this way, by the protection of oxide, conducive to the stable structure for further increasing monocrystalline ternary material
Property.
Preferably, clad includes Al2O3And ZrO2；And Al in clad2O3And ZrO2The weight of shared positive active material
Amount number is respectively 0.8% ± 0.5% and 0.5% ± 0.3%, i.e. positive active material has 0.8% ± 0.5% Al2O3With
0.5% ± 0.3%ZrO2。
As a preferred embodiment of the present embodiment, Al in clad2O3And ZrO2The weight of shared positive active material
Number is respectively 0.8% and 0.5%.
Preferably, the component of anode coating 12 includes the component of following parts by weight:
Positive active material 95.0%~98.2%；
Positive electrode binder 1.0%~5.0%；
Positive conductive agent 0.3%~5.0%.
Herein, it is optimized by the component to anode coating 12, conducive to the capacity for improving lithium ion battery
With the adhesive force of anode coating 12, thus be conducive to improve lithium ion battery long circulation life and security reliability.
Preferably, anode coating 12 includes the component of following parts by weight: positive active material 97.2%；It is just very viscous
Tie agent 1.3%；Positive conductive agent 1.5%；Alternatively, anode coating 12 includes the component of following parts by weight: positive-active
Substance 98.2%；Positive electrode binder 1.0%；Positive conductive agent 0.8%；Alternatively, anode coating 12 includes following parts by weight
Several component: positive active material 95.0%；Positive electrode binder 2.5%；Positive conductive agent 2.5%.Through experimental test it is found that electricity
Using the component of these parts by weight, the raising capacity of lithium ion battery obtained, raising anode apply pond anode coating 12
12 adhesive force of layer improve cycle performance of lithium ion battery and improve the effect of lithium ion battery safety performance all than more significant.
Preferably, positive conductive agent is electrically conductive graphite, conductive carbon black, carbon nanotube, carbon fiber, carbon nanotube, graphene
At least one of.Positive conductive agent at least one of using these substances, can be conducive to reduce the internal resistance of lithium ion battery and
Improve capacity, cycle performance, the high rate performance of lithium ion battery.
Preferably, positive electrode binder is at least one of polyvinylidene fluoride PVDF, PVAC polyvinylalcohol.Anode bonding
Agent uses both binders, it is ensured that anode coating 12 has good adhesion property.
Preferably, cathode metal substrate 11 with a thickness of 12 μm ± 2 μm, battery anode slice 1 with a thickness of 123 μm ± 5 μm.
In this way, under the premise of guaranteeing that 1 figure of battery anode slice is lesser, conducive to the optimum performance for playing positive active material.It of courses,
In concrete application, the thickness of cathode metal substrate 11 and the thickness of battery anode slice 1 are without being limited thereto.
Preferably, cathode metal substrate 11 is aluminium foil, can meet the electric conductivity requirement of battery anode slice 1, and matter
Amount is light, at low cost.It of courses, in concrete application, the material of cathode metal substrate 11 is without being limited thereto.
Preferably, the manufacturing method of the battery anode slice 1 of the present embodiment, includes the following steps:
Positive electrode binder is added in n-methlpyrrolidone solvent by the weight part ratio in anode coating 12
Mixing, is made the anode bonding glue that solid content is 5%~10%, and the solid content of anode bonding glue specifically refers to positive bonding
Remainder accounts for the mass percent of total amount after glue drying；
Positive conductive agent is added by the weight part ratio in anode coating 12 in anode bonding glue, is made just
Pole conductive gelatin；
Positive active material is added by the weight part ratio in anode coating 12 in positive conductive glue, is added
The anode sizing agent that solid content is 40%~75% is made in n-methlpyrrolidone solvent；
Anode sizing agent is coated on cathode metal substrate 11, anode coating intermediate products are made；
By anode coating intermediate products solidification is dried, using by anode sizing agent dry solidification as anode coating 12,
Anode solidification intermediate products are made；
Roll-in is successively carried out to anode solidification intermediate products, cuts processing, positive plate semi-finished product are made；
Anode ear 13 is welded on positive plate semi-finished product, and battery anode slice 1 is made.
Preferably, lithium salt 1.1mol/L~1.3mol/L of electrolyte.Herein, electrolyte can form high voltage electrolysis
Liquid.
It preferably, include bis- (fluorine sulphonyl) imine lithiums of LiFSI in electrolyte, in TMSP tri- (trimethyl silane) phosphate
At least one.Bis- (fluorine sulphonyl) imine lithiums of LiFSI, TMSP tri- (trimethyl silane) can stablize battery under high voltage condition
The dissolution of electrode surface metal ion and the oxygenolysis of electrolyte are reduced, to mention in interface between positive plate 1 and electrolyte
The stability of high battery anode slice 1, and then promote the cycle life of lithium ion battery.
It is further preferable that electrolyte includes solvent, lithium salts, the first additive and Second addition, solvent is EC (carbonic acid second
Enester), the mixture of DMC (dimethyl carbonate), EMC (methyl ethyl carbonate), the first additive includes FEC (fluoro ethylene carbonate
Ester), DTD (sulfuric acid vinyl ester), LiDFOB (difluorine oxalic acid boracic acid lithium).In specific production process, battery anode slice 1, battery are negative
Pole piece 2, the first diaphragm, the second membrane winding are made battery roll core and are put into battery case, inject high-voltage electrolyte, electrolyte
Solvent and the first additive stable SEI film can be formed in battery cathode sheet 2；By increasing the bis- (fluorine of Second addition LiFSI
Sulphonyl) imine lithium, TMSP tri- (trimethyl silane), the boundary under high voltage condition, between stable battery anode slice 1 and electrolyte
The dissolution of electrode surface metal ion and the oxygenolysis of electrolyte are reduced in face, so that the stability of battery anode slice 1 is improved,
And then promote the cycle life of lithium ion battery.
As a preferred embodiment of the present embodiment, in electrolyte, solvent ratios EC:DMC:EMC=1:1:8, lithium
Salinity is 1.2mol/L, and the first additive level is 3%FEC, 0.5%DTD, 0.5%LiDFOB, and Second addition includes
LiFSI and TMSP.
Preferably, lithium ion battery provided in this embodiment is the long circulating cylinder of a kind of 4.35V high voltage, 2400mAh
Lithium ion battery, charge cutoff voltage 4.35V, the compared with the existing technology charge cutoff voltage of 4.2V, positive electrode active material
The gram volume of matter promotes 8%, battery capacity and promotes 8%, energy density promotion 8%~9%, can realize 2.75V~4.35V electricity
It presses in range, 0.5CA current charging and discharging recycles 1000 weeks, capacity retention ratio >=80%.
Lithium ion battery provided in this embodiment has following remarkable result:
1) use the synthetic graphite particles for being coated with hard carbon material as negative electrode active material, therefore, using hard carbon material
Layer forms protective layer outside synthetic graphite particles prevents the solvent molecule of electrolyte to be embedded into cathode graphite-structure layer, and hard carbon
The conductive characteristic that can be good of material, thus be conducive to further promote the cycle performance of lithium ion battery, it is final effectively to extend
The cycle life of lithium ion battery.
2) using the monocrystalline ternary material LiNi after claddingxMnyCozO2Particle as a positive electrode active material so that obtained
Positive active material D50It is smaller, it is 7 ± 3 μm, therefore under the de- lithium state in high voltage 4.35V, positive active material particle
Volume change is small, stable structure.
3) in the preferable hard carbon material of artificial graphite outer cladding cycle performance using as negative electrode active material, to extend
The cycle life of lithium ion battery, in addition, graphite particle few surface defects, can form stable electrode/electrolyte interfacial film (i.e.
SEI film).
4) this case, negative electrode binder are preferably polyacrylate.Polyacrylic acid has long chain structure similar with SBR,
Therefore its adhesive property is suitable with SBR；Meanwhile possessing carboxyl structure, it can be with Li+Carboxylic acid lithium group is formed, is helped to improve
Li+Conductive performance, therefore pole piece resistance and the internal resistance of cell are smaller, are conducive to the promotion of cycle performance of battery.
5) by optimizing and revising formula, coated face density and the roll-in compactness of positive coating and 22 material of cathode coating,
To improve the mechanical strength and electrochemical stability of electrode, and then improve the cycle life of lithium ion battery.
6) high-voltage electrolyte is used, electrolyte lithium salt 1.1mol/L~1.3mol/L increases in electrolyte prescription
Add special additive LiFSI and TMSP, under high voltage condition, reduces the dissolution of electrode surface metal ion and the oxygen of electrolyte
Change and decompose, to improve the cyclical stability of anode, and then promotes the cycle life of battery.
7) positive and negative electrode formula of size and pole piece process design parameter reach optimum value, suitable material prescription and pole piece work
Skill makes materials serve optimum performance, improves the comprehensive performance of battery.
As a preferred embodiment of the present embodiment, the manufacturing process and its performance test results of lithium ion battery are such as
Under:
Selection tap density is 1.6g/cm3~2.4g/cm3, specific surface area 0.4m2/ g~0.8m2/ g, D50 be 4 μm~
8 μm, gram volume is 155mAh/g~175mAh/g, outside cladding treated monocrystalline ternary material LiNixMnyCozO2Particle is made
For positive active material.Selection tap density is 0.9g/cm3~1.2g/cm3, specific surface area 0.8m2/ g~1.2m2/g、D50
For 11 μm~18 μm, gram volume be 340mAh/g~380mAh/g, outside is coated with the small particle graphous graphite powder of hard carbon material
As negative electrode active material.Select the polyacrylate for having both caking property and good electric conductivity as negative electrode binder.
Weight percent is mixed for 1.3% polyvinylidene fluoride and N-Methyl pyrrolidone solvent, is made solid
Content is the positive electrode binder glue of 5-10%；The carbon nanotube conducting agent that weight percent is 1.5% is subsequently added into be mixed
It closes, positive conductive glue is made；The positive active material that weight percent is 97.2% is added in conductive gelatin again, N- is added
It is uniformly mixed after methyl pyrrolidone solvent, the anode sizing agent that amount of solid is 60-75% is made；Anode sizing agent is coated in 12 μm
On thick metal aluminum foil, 80 DEG C~120 DEG C at a temperature of it is dry after, be rolled into the battery anode slice 1 of about 123 μ m-thick of thickness.
The CMC dry powder that weight percent is 1.3% is added in deionized water and is mixed, be made solid content be 2.0% it is outstanding
Floating agent glue, it is spare；Soft carbon material will be coated with, the small particle graphous graphite powder that weight percent is 95.0%, 1.5%
Super P dry powder and 50%~70% suspending agent glue are mixed, and after cooperating certain revolving speed and time mixing, are added
The polyacrylate emulsion that remaining whole suspending agent glue and weight percent are 2.2%, cooperates certain revolving speed and time to carry out
After mixing, appropriate amount of deionized water is added and continuess to mix, the negative electrode slurry of amount of solid 40%~55% is made, negative electrode slurry is coated
On the metal copper foil of 8 μ m-thicks, 80 DEG C~120 DEG C at a temperature of it is dry after, be rolled into the battery cathode of about 147 μ m-thick of thickness
Piece 2.
Battery positive and negative plate is cut into strip, metal aluminum foil welding pole is reserved at 1 length 2/5 of battery anode slice
Ear, 2 one end of battery cathode sheet reserve one section of metal copper foil soldering polar ear, will be with a thickness of 16 μm of polyethylene film diaphragm and battery
Negative electrode tab 2, battery anode slice 1 are wound into cylindric core, and 13 Laser Welding of anode ear that battery anode slice 1 is drawn is welded on lid
At cap aluminium flake connection sheet, the negative electrode lug 23 that battery cathode sheet 2 is drawn is welded to the steel shell bottom of battery case, is sufficiently toasted
After cylindric core, electrolyte 5.6-5.8g is injected, sealing is placed in 25 DEG C~35 DEG C of environment after placing 48h, and use is specific
Chemical synthesis technology is melted into activated batteries, so that its internal electrode and electrolyte interface is formed stable SEI film, that is, is assembled into high voltage
Macrocyclic 2400mAh lithium ion battery.
It is to lithium ion battery progress constant-current constant-voltage charging (cut-off current 0.01CA) to voltage with 0.5CA electric current
4.35V, again with 0.2CA constant current to battery be discharged to voltage be 2.75V when, discharge capacity of the cell >=2400mAh；When
It is that 2.75-4.35V fills lithium ion battery with 0.5CA constant-current constant-voltage charging and 0.5CA constant-current discharge system, voltage range
Discharge cycles test, the 1000th week battery capacity >=initial capacity 80%.
Embodiment two:
Battery cathode coating 22, battery cathode sheet 2, the manufacturing method of battery cathode sheet 2 and lithium provided in this embodiment from
It is different to essentially consist in positive active material from the difference of embodiment one, embodies as follows for sub- battery:
In the present embodiment, the positive active material includes ternary material LiNixMnyCozO2Particle is doped in described three
First material LiNixMnyCozO2Intragranular doped chemical and it is coated on the ternary material LiNixMnyCozO2Cladding outside particle
Layer, wherein 0.5≤x≤0.8,0.1≤y≤0.3,0.1≤z≤0.3, x+y+z=1.0；
The doped chemical includes at least one of Al, F；
The clad includes MgO, Al2O3、ZrO2、TiO2、AlPO4、AlF3、LiAlO2、LiTiO2At least one of.
Anode coating 12 provided in this embodiment has doped chemical, external three to be coated with coating layer using inside
First material LiNixMnyCozO2Particle as a positive electrode active material, using ternary material LiNixMnyCozO2The small characteristic of partial size,
The median of positive active material is effectively reduced, so that under de- lithium state of the positive active material in high voltage 4.4V
The variation of plastochondria product is smaller, to improve the structural stability of lithium ion battery.
If doped chemical includes Al element, the brilliant intracorporal cationic mixing degree of ternary material can be reduced, crystal is made
Structure tends towards stability under high-voltage state；If doped chemical includes F element, material surface can be made to react shape with electrolyte
At the smaller film of impedance (i.e. anode SEI film), so as to reduce the resistance of battery anode slice, and then reduce in lithium ion battery
Resistance is conducive to the cycle performance for improving lithium ion battery.
Ternary material LiNixMnyCozO2During the charging process, as lithium ion is constantly detached from, interior metal is first for particle
The chemical valence of element also accordingly increases, if not to ternary material LiNixMnyCozO2Particle takes any safeguard procedures, ternary material
Expect LiNixMnyCozO2Particle easily reacts with electrolyte, so as to cause metal ion dissolution, and then will lead to ternary material
Expect LiNixMnyCozO2The structure of particle is destroyed；And with the continuous raising of charging voltage, metal ion solution rate
Also constantly accelerating, the embodiment of the present invention passes through cladding MgO, Al2O3、ZrO2、TiO2、AlPO4、AlF3、LiAlO2、LiTiO2In
At least one, these cladding substances in ternary material LiNixMnyCozO2Particle surface forms a protective layer, to avoid
Cathode metal ion-solubility ensures that cathode material structure is stable, does not have metal ion dissolution, and then can in charge and discharge process
The middle stability for keeping positive active material structure, finally effectively improves the cycle life of lithium ion battery.
Preferably, doped chemical includes Al and F, wherein Al account for positive active material parts by weight be 0.5% ±
0.3% (the present embodiment is preferably 0.5%), the parts by weight that F accounts for the positive active material are 0.9% ± 0.4% (this implementation
Example is preferably 0.9%).Herein, using Al and F element codope, wherein 0.5% Al element doping reduces ternary material
Brilliant intracorporal cationic mixing degree, makes crystal structure tend towards stability under high-voltage state；0.9% F element doping, makes material
Material surface reacts to form the smaller film of impedance (i.e. anode SEI film) with electrolyte, thus reduce the resistance of battery anode slice 1,
And then reduce lithium ion battery internal resistance, be conducive to the cycle performance for improving lithium ion battery, on this basis, then to ternary material
The 0.5%Al of cladding 0.8%2O3And 0.2%ZrO2, electrolyte can be prevented to avoid bad pair to the corrosion of anode sheet material
The generation of reaction, to promote the cycle life of 1 material of battery anode slice.
Preferably, doped chemical Al, F is doped in ternary material LiNixMnyCozO2Intragranular method are as follows: by Al, F
At least one of with ternary material LiNixMnyCozO2It is mixed, in process conditions such as temperature appropriate, time, atmosphere
Under, after carrying out the processes such as lithiumation sintering, crushing, obtain the ternary material LiNi doped with Al, FxMnyCozO2Particle.Doping changes
After property, the Al of doping, F ion enter ternary material LiNixMnyCozO2Inside particle, to improve positive active material
Performance.
Preferably, lithium ion battery provided in this embodiment is the long circulating cylinder of a kind of 4.4V high voltage, 2400mAh
Lithium ion battery, charge cutoff voltage 4.4V, the compared with the existing technology charge cutoff voltage of 4.2V, lithium-ion electric pool capacity
Amount promotes 14%~17%, can realize in 2.75V~4.4V voltage range, and 0.5CA current charging and discharging recycles 400 weeks, capacity
Conservation rate >=80%.
As a preferred embodiment of the present embodiment, the manufacturing process and its performance test results of lithium ion battery are such as
Under:
Selection tap density is 1.6g/cm3~2.4g/cm3, specific surface area 0.4m2/ g~0.8m2/ g, D50 be 4 μm~
8 μm, gram volume is 155mAh/g~175mAh/g, internal doped with Al, F element and external cladding treated monocrystalline ternary material
Expect LiNixMnyCozO2Particle is as a positive electrode active material.Selection tap density is 0.9g/cm3~1.2g/cm3, specific surface area be
0.8m2/ g~1.2m2/ g, D50 is 11 μm~18 μm, gram volume is 340mAh/g~380mAh/g, and outside is coated with hard carbon material
Small particle graphous graphite powder as negative electrode active material.Select the polyacrylic acid for having both caking property and good electric conductivity as negative
Pole binder.
Weight percent is mixed for 1.3% polyvinylidene fluoride and N-Methyl pyrrolidone solvent, is made solid
Content is the positive electrode binder glue of 5-10%；The carbon nanotube conducting agent that weight percent is 1.5% is subsequently added into be mixed
It closes, positive conductive glue is made；The positive active material that weight percent is 97.2% is added in conductive gelatin again, N- is added
It is uniformly mixed after methyl pyrrolidone solvent, the anode sizing agent that amount of solid is 60-75% is made；Anode sizing agent is coated in 12 μm
On thick metal aluminum foil, 80 DEG C~120 DEG C at a temperature of it is dry after, be rolled into the battery anode slice 1 of about 123 μ m-thick of thickness.
The CMC dry powder that weight percent is 1.3% is added in deionized water and is mixed, be made solid content be 2.0% it is outstanding
Floating agent glue, it is spare；Soft carbon material will be coated with, the small particle graphous graphite powder that weight percent is 95.0%, 1.5%
Super P dry powder and 50%~70% suspending agent glue are mixed, and after cooperating certain revolving speed and time mixing, are added
The polyacrylate emulsion that remaining whole suspending agent glue and weight percent are 2.2%, cooperates certain revolving speed and time to carry out
After mixing, appropriate amount of deionized water is added and continuess to mix, the negative electrode slurry of amount of solid 40%~55% is made, negative electrode slurry is coated
On the metal copper foil of 8 μ m-thicks, 80 DEG C~120 DEG C at a temperature of it is dry after, be rolled into the battery cathode of about 147 μ m-thick of thickness
Piece 2.
Battery positive and negative plate is cut into strip, metal aluminum foil welding pole is reserved at 1 length 2/5 of battery anode slice
Ear, 2 one end of battery cathode sheet reserve one section of metal copper foil soldering polar ear, will be with a thickness of 16 μm of polyethylene film diaphragm and battery
Negative electrode tab 2, battery anode slice 1 are wound into cylindric core, and 13 Laser Welding of anode ear that battery anode slice 1 is drawn is welded on lid
At cap aluminium flake connection sheet, the negative electrode lug 23 that battery cathode sheet 2 is drawn is welded to the steel shell bottom of battery case, is sufficiently toasted
After cylindric core, electrolyte 5.6-5.8g is injected, sealing is placed in 25 DEG C~35 DEG C of environment after placing 48h, and use is specific
Chemical synthesis technology is melted into activated batteries, so that its internal electrode and electrolyte interface is formed stable SEI film, that is, is assembled into high voltage
Macrocyclic 2400mAh lithium ion battery.
It is to lithium ion battery progress constant-current constant-voltage charging (cut-off current 0.01CA) to voltage with 0.5CA electric current
4.4V, again with 0.2CA constant current to battery be discharged to voltage be 2.75V when, discharge capacity of the cell >=2400mAh；When
It is that 2.75-4.4V fills lithium ion battery with 0.5CA constant-current constant-voltage charging and 0.5CA constant-current discharge system, voltage range
Discharge cycles test, the 400th week battery capacity >=initial capacity 80%.
In addition to above-mentioned in ternary material LiNixMnyCozO2Increase outside doping Al, F element in particle, it is provided in this embodiment
Battery cathode coating 22, battery cathode sheet 2, the manufacturing method of battery cathode sheet 2 and lithium ion battery other design means all
It can refer to embodiment one to optimize, this will not be detailed here.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (10)
1. battery cathode coating, which is characterized in that the component of the battery cathode coating includes negative electrode active material, negative conductive
Agent, suspending agent and negative electrode binder, the negative electrode active material include synthetic graphite particles and are coated on outside synthetic graphite particles
Hard carbon material layer.
2. battery cathode coating as described in claim 1, which is characterized in that the battery cathode coating includes following parts by weight
Several components: negative electrode active material 94.0%~97.0%, cathode conductive agent 0.2%~2.2%, suspending agent 1.2%~
2.0%, negative electrode binder 1.4%~2.4%.
3. battery cathode coating as claimed in claim 2, which is characterized in that the battery cathode coating includes following parts by weight
Several component: negative electrode active material 95.0%, cathode conductive agent 1.5%, suspending agent 1.3%, negative electrode binder 2.2%；Alternatively,
The battery cathode coating includes the component of following parts by weight: negative electrode active material 94.0%, cathode conductive agent
1.6%, suspending agent 2.0%, negative electrode binder 2.4%；Alternatively,
The battery cathode coating includes the component of following parts by weight: negative electrode active material 97.0%, cathode conductive agent
0.3%, suspending agent 1.2%, negative electrode binder 1.5%.
4. battery cathode coating as described in any one of claims 1 to 3, which is characterized in that the hard carbon material layer uses carbon
It is black to be made；And/or
The cathode conductive agent includes at least one of conductive carbon black, electrically conductive graphite, carbon nanotube；And/or
The negative electrode binder includes at least one of sodium carboxymethylcellulose, butadiene-styrene rubber, polyacrylic acid, sodium alginate；
And/or
The suspending agent is sodium carboxymethylcellulose.
5. battery cathode sheet including negative metal substrate, the negative electrode lug being conductively connected with the negative metal substrate and is coated on
Cathode coating outside the negative metal substrate, which is characterized in that the cathode coating is used such as any one of Claims 1-4
The battery cathode coating.
6. the manufacturing method of battery cathode sheet as claimed in claim 5, which comprises the steps of:
Suspending agent dry powder is added in deionized water and is mixed, suspending agent glue is made；
Negative electrode active material, cathode conductive agent and 50%~70% suspending agent glue are mixed, cathode half is made
Finished product slurry；
After addition negative electrode binder and the remaining suspending agent glue are mixed in the cathode semi-finished product slurry, it is added
Deionized water continuess to mix, and negative electrode slurry is made；
The negative electrode slurry is coated on negative metal substrate, cathode is made and coats intermediate products；
Solidification is dried in cathode coating intermediate products, as battery cathode coating, to make negative electrode slurry dry solidification
It obtains cathode and solidifies intermediate products；
Roll-in is successively carried out to the anode solidification intermediate products, cuts processing, negative electrode tab semi-finished product are made；
Negative electrode lug is welded on the negative electrode tab semi-finished product, battery cathode sheet is made.
7. lithium ion battery, which is characterized in that including battery case, battery anode slice, the first diaphragm, the second diaphragm, electrolyte
It is the battery anode slice, the battery cathode sheet, first diaphragm, described with battery cathode sheet as claimed in claim 5
Second diaphragm and the electrolyte are all set in the battery case, and the battery anode slice, the battery cathode sheet, described
First diaphragm, second diaphragm are all dipped in the electrolyte, and the battery cathode sheet is located at the battery anode slice and institute
State between battery case, first diaphragm be set between the battery anode slice and the battery cathode sheet, described second every
Film is set between the battery case and the battery cathode sheet.
8. lithium ion battery as claimed in claim 7, which is characterized in that battery anode slice includes cathode metal substrate and institute
State the anode ear of cathode metal substrate conductive connection and coated on the anode coating outside the cathode metal substrate, the electricity
The component of pond anode coating includes positive active material, positive electrode binder, positive conductive agent, the middle position of the positive active material
Partial size D50For 7mm ± 3 μm.
9. lithium ion battery as claimed in claim 8, which is characterized in that the positive active material includes ternary material
LiNixMnyCozO2Particle and it is coated on the ternary material LiNixMnyCozO2Clad outside particle, wherein 0.5≤x≤
0.8,0.1≤y≤0.3,0.1≤z≤0.3, x+y+z=1.0；
The clad includes MgO, Al2O3、ZrO2、TiO2、AlPO4、AlF3、LiAlO2、LiTiO2At least one of；Alternatively,
The component of the anode coating includes positive active material, positive electrode binder, positive conductive agent, the positive-active
Substance includes ternary material LiNixMnyCozO2Particle is doped in the ternary material LiNixMnyCozO2Intragranular doping member
Element and be coated on the ternary material LiNixMnyCozO2Clad outside particle, wherein 0.5≤x≤0.8,0.1≤y≤
0.3,0.1≤z≤0.3, x+y+z=1.0；
The doped chemical includes at least one of Al, F；
The clad includes MgO, Al2O3、ZrO2、TiO2、AlPO4、AlF3、LiAlO2、LiTiO2At least one of.
10. such as the described in any item lithium ion batteries of claim 7 to 9, which is characterized in that the lithium salt of the electrolyte
1.1mol/L~1.3mol/L；And/or
It include at least one of LiFSI, TMSP in the electrolyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811646579.3A CN109888200A (en) | 2018-12-29 | 2018-12-29 | Battery cathode coating, battery cathode sheet and its manufacturing method, lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811646579.3A CN109888200A (en) | 2018-12-29 | 2018-12-29 | Battery cathode coating, battery cathode sheet and its manufacturing method, lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109888200A true CN109888200A (en) | 2019-06-14 |
Family
ID=66925374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811646579.3A Pending CN109888200A (en) | 2018-12-29 | 2018-12-29 | Battery cathode coating, battery cathode sheet and its manufacturing method, lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109888200A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635138A (en) * | 2019-08-02 | 2019-12-31 | 河南平煤国能锂电有限公司 | Lithium ion battery pole piece and manufacturing method thereof |
| CN111403738A (en) * | 2020-03-19 | 2020-07-10 | 湖北容百锂电材料有限公司 | Positive electrode active material of battery cell, high-voltage high-rate battery cell and manufacturing method of battery cell |
| CN112397693A (en) * | 2020-10-10 | 2021-02-23 | 惠州锂威新能源科技有限公司 | High-rate rapid charging negative electrode material and preparation method thereof, negative electrode plate and battery |
| CN112652815A (en) * | 2021-01-25 | 2021-04-13 | 郑州中科新兴产业技术研究院 | Low-internal-resistance all-solid-state battery and preparation method thereof |
| CN112713277A (en) * | 2020-12-30 | 2021-04-27 | 宁波杉杉新材料科技有限公司 | Hard carbon material, preparation method and application thereof, and lithium ion battery |
| CN114068861A (en) * | 2020-07-30 | 2022-02-18 | 通用汽车环球科技运作有限责任公司 | Positive electrode for secondary lithium metal batteries and method of manufacture |
| CN114156484A (en) * | 2022-02-08 | 2022-03-08 | 天津蓝天太阳科技有限公司 | Negative electrode material and low-temperature battery based on same |
| CN114725378A (en) * | 2022-04-22 | 2022-07-08 | 湖南钠方新能源科技有限责任公司 | Negative electrode slurry and preparation method thereof, negative electrode plate and secondary battery |
| CN115201075A (en) * | 2022-09-16 | 2022-10-18 | 江苏正力新能电池技术有限公司 | Method for testing volume change rate of active particulate matters in electrochemical process |
| CN115440933A (en) * | 2022-09-27 | 2022-12-06 | 厦门海辰储能科技股份有限公司 | Negative pole piece, battery package and consumer |
| CN116314587A (en) * | 2023-03-14 | 2023-06-23 | 上海扬广科技有限责任公司 | Sodium ion battery negative plate and sodium ion battery |
| WO2024087817A1 (en) * | 2022-10-24 | 2024-05-02 | 珠海冠宇电池股份有限公司 | Negative electrode sheet and lithium-ion battery |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082272A (en) * | 2010-12-29 | 2011-06-01 | 长沙海容新材料有限公司 | Hard carbon coated lithium ion battery anode material and preparation method thereof |
| CN102244257A (en) * | 2011-06-15 | 2011-11-16 | 清华大学深圳研究生院 | High-temperature manganic acid lithium cathode material and preparation method thereof |
| CN102347471A (en) * | 2010-08-02 | 2012-02-08 | 清华大学 | Lithium-nickel-cobalt-manganese oxide composite material particle and preparation method thereof as well as battery |
| CN102683646A (en) * | 2012-05-30 | 2012-09-19 | 焦作聚能能源科技有限公司 | Preparation method of composite negative electrode material of lithium ion battery |
| CN102694167A (en) * | 2011-08-30 | 2012-09-26 | 中国科学院宁波材料技术与工程研究所 | Modified lithium manganate positive pole material and preparation method thereof |
| CN103208632A (en) * | 2012-12-31 | 2013-07-17 | 深圳宏泰电池科技有限公司 | Nano-battery composed of carbon nanotube and lithium nickel manganese oxide and preparation method thereof |
| CN106410144A (en) * | 2016-11-02 | 2017-02-15 | 天津市捷威动力工业有限公司 | Lithium ion battery capable of improving low-temperature charging performance |
-
2018
- 2018-12-29 CN CN201811646579.3A patent/CN109888200A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347471A (en) * | 2010-08-02 | 2012-02-08 | 清华大学 | Lithium-nickel-cobalt-manganese oxide composite material particle and preparation method thereof as well as battery |
| CN102082272A (en) * | 2010-12-29 | 2011-06-01 | 长沙海容新材料有限公司 | Hard carbon coated lithium ion battery anode material and preparation method thereof |
| CN102244257A (en) * | 2011-06-15 | 2011-11-16 | 清华大学深圳研究生院 | High-temperature manganic acid lithium cathode material and preparation method thereof |
| CN102694167A (en) * | 2011-08-30 | 2012-09-26 | 中国科学院宁波材料技术与工程研究所 | Modified lithium manganate positive pole material and preparation method thereof |
| CN102683646A (en) * | 2012-05-30 | 2012-09-19 | 焦作聚能能源科技有限公司 | Preparation method of composite negative electrode material of lithium ion battery |
| CN103208632A (en) * | 2012-12-31 | 2013-07-17 | 深圳宏泰电池科技有限公司 | Nano-battery composed of carbon nanotube and lithium nickel manganese oxide and preparation method thereof |
| CN106410144A (en) * | 2016-11-02 | 2017-02-15 | 天津市捷威动力工业有限公司 | Lithium ion battery capable of improving low-temperature charging performance |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635138A (en) * | 2019-08-02 | 2019-12-31 | 河南平煤国能锂电有限公司 | Lithium ion battery pole piece and manufacturing method thereof |
| CN111403738A (en) * | 2020-03-19 | 2020-07-10 | 湖北容百锂电材料有限公司 | Positive electrode active material of battery cell, high-voltage high-rate battery cell and manufacturing method of battery cell |
| CN114068861A (en) * | 2020-07-30 | 2022-02-18 | 通用汽车环球科技运作有限责任公司 | Positive electrode for secondary lithium metal batteries and method of manufacture |
| CN112397693A (en) * | 2020-10-10 | 2021-02-23 | 惠州锂威新能源科技有限公司 | High-rate rapid charging negative electrode material and preparation method thereof, negative electrode plate and battery |
| CN112397693B (en) * | 2020-10-10 | 2022-06-17 | 惠州锂威新能源科技有限公司 | High-rate rapid charging negative electrode material and preparation method thereof, negative electrode plate and battery |
| CN112713277A (en) * | 2020-12-30 | 2021-04-27 | 宁波杉杉新材料科技有限公司 | Hard carbon material, preparation method and application thereof, and lithium ion battery |
| CN112652815A (en) * | 2021-01-25 | 2021-04-13 | 郑州中科新兴产业技术研究院 | Low-internal-resistance all-solid-state battery and preparation method thereof |
| CN112652815B (en) * | 2021-01-25 | 2021-10-29 | 郑州中科新兴产业技术研究院 | Low-internal-resistance all-solid-state battery and preparation method thereof |
| CN114156484A (en) * | 2022-02-08 | 2022-03-08 | 天津蓝天太阳科技有限公司 | Negative electrode material and low-temperature battery based on same |
| CN114725378A (en) * | 2022-04-22 | 2022-07-08 | 湖南钠方新能源科技有限责任公司 | Negative electrode slurry and preparation method thereof, negative electrode plate and secondary battery |
| CN115201075A (en) * | 2022-09-16 | 2022-10-18 | 江苏正力新能电池技术有限公司 | Method for testing volume change rate of active particulate matters in electrochemical process |
| CN115201075B (en) * | 2022-09-16 | 2022-12-09 | 江苏正力新能电池技术有限公司 | Method for testing volume change rate of active particulate matters in electrochemical process |
| CN115440933A (en) * | 2022-09-27 | 2022-12-06 | 厦门海辰储能科技股份有限公司 | Negative pole piece, battery package and consumer |
| WO2024087817A1 (en) * | 2022-10-24 | 2024-05-02 | 珠海冠宇电池股份有限公司 | Negative electrode sheet and lithium-ion battery |
| CN116314587A (en) * | 2023-03-14 | 2023-06-23 | 上海扬广科技有限责任公司 | Sodium ion battery negative plate and sodium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109888200A (en) | Battery cathode coating, battery cathode sheet and its manufacturing method, lithium ion battery | |
| CN109888199A (en) | Battery cathode coating, battery cathode sheet and its manufacturing method, lithium ion battery | |
| CN109830654A (en) | Anode coating, battery anode slice and lithium ion battery | |
| CN105098188B (en) | A kind of anode material for lithium-ion batteries additive and preparation method thereof, positive electrode and lithium ion battery containing the additive | |
| CN105958008B (en) | A kind of lithium ion battery anode composite piece, preparation method and lithium ion battery | |
| CN110165284B (en) | Lithium ion secondary battery | |
| CN108539122A (en) | A kind of positive plate and the lithium rechargeable battery comprising the positive plate | |
| CN109817906A (en) | Anode coating, battery anode slice and lithium ion battery | |
| CN108604674A (en) | Anode of secondary cell, its manufacturing method and the lithium secondary battery comprising the anode | |
| CN110534795A (en) | The preparation method and solid state battery of solid state battery | |
| CN205609666U (en) | Safe lithium ion power batteries positive plate | |
| CN106876633A (en) | A kind of composite diaphragm, lithium battery and preparation method thereof | |
| JP2009277597A (en) | Nonaqueous electrolyte secondary battery | |
| CN201845833U (en) | Novel polymer lithium-ion secondary battery | |
| CN103682307B (en) | Nickel ion doped/lithium titanate battery and preparation method thereof | |
| JP6211595B2 (en) | Nonaqueous electrolyte secondary battery | |
| JP6805374B2 (en) | Electrodes for lithium-ion secondary batteries, their manufacturing methods, and lithium-ion secondary batteries | |
| CN110323493A (en) | A kind of anode pole piece and the compounded plate of polymer dielectric film and preparation method thereof | |
| CN105977469A (en) | High-performance lithium titanate battery | |
| CN109193041A (en) | A kind of lithium ion battery that high temperature cyclic performance is excellent | |
| CN103858260A (en) | Rechargeable lithium-iron battery and use of a glass-based material for it | |
| CN109346669A (en) | Battery anode slice and its manufacturing method and lithium ion battery and its manufacturing method | |
| CN110534789A (en) | Battery and preparation method thereof | |
| CN113540413A (en) | Positive electrode material, positive plate, lithium ion battery and preparation method thereof | |
| JP6265521B2 (en) | ELECTRODE FOR LITHIUM SECONDARY BATTERY, ITS MANUFACTURING METHOD, AND LITHIUM SECONDARY BATTERY USING THE SAME |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190614 |