CN110504407A - A kind of anode electrode of lithium ion battery, preparation method - Google Patents
A kind of anode electrode of lithium ion battery, preparation method Download PDFInfo
- Publication number
- CN110504407A CN110504407A CN201910748492.5A CN201910748492A CN110504407A CN 110504407 A CN110504407 A CN 110504407A CN 201910748492 A CN201910748492 A CN 201910748492A CN 110504407 A CN110504407 A CN 110504407A
- Authority
- CN
- China
- Prior art keywords
- electrode active
- active material
- lithium ion
- layer
- adhesive
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- 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
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
-
- 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
Abstract
The present invention provides a kind of anode electrode of lithium ion battery, structure respectively is barrier layer 3, electrode active material layer 2, current collector layer 1, electrode active material layer 2, barrier layer 3, the present invention also provides a kind of methods for preparing anode electrode of lithium ion battery as described above, by in the electrode coated active material layer 2 in 1 two outer surfaces of current collector layer, obtain existing existing anode electrode, barrier layer 3 is respectively coated in the outer surface of two electrode active material layers again, it include uniformly mixed barrier material in the barrier layer, second adhesive, dispersing agent, the barrier material is selected from Al2O3、AlPO4, any one in ZnO, MgO, electrode active material layer can be isolated by coating barrier layer with electrolyte, reduce the generation of side reaction, in addition, the thermal stability height of barrier material, to improve the thermal stability of anode electrode of lithium ion battery.
Description
Technical field
The present invention relates to anode material for lithium-ion batteries technical field more particularly to a kind of anode electrode of lithium ion battery and
Preparation method.
Background technique
Lithium ion battery is as a kind of novel green secondary cell, and with small in size, light weight, specific capacity is big, recycles the longevity
The advantages that life is long, self discharge is small, memory-less effect, is widely used.New energy lithium battery industry high speed development in recent years,
China's new-energy automobile is subsidized to be tilted to the product of higher energy density, higher course continuation mileage.In lithium ion battery, positive electrode
The key restriction factors developed as restriction battery to high-energy density.The study found that (the letter of Layered Lithium nickel, cobalt, manganese and oxygen positive electrode
Claim tertiary cathode material) have many advantages, such as height ratio capacity, stable cycle performance, advantage of lower cost, tertiary cathode material (NCM,
NCA) gradually show one's talent in the application of positive electrode market.
Side reaction can occur when active material and electrolyte contacts in tertiary cathode material, lead to the molten of metal ion
Solution, in addition, the poor heat resistance of tertiary cathode material, active material is when with electrolyte contacts, under the high temperature conditions, meeting
Corroded by HF, causes capacity attenuation serious.
Summary of the invention
For overcome the deficiencies in the prior art, it is an object of the present invention to provide a kind of anode electrode of lithium ion battery,
The structure of the anode electrode of lithium ion battery respectively is barrier layer, electrode active material layer, current collector layer, electrode activity
Material layer, barrier layer；It is covered each by barrier layer in the outer surface of two electrode active material layers, to electrode active material
Layer has carried out insulation blocking effect, prevents electrode active material layer from directly contacting with electrolyte and side reaction occurs, in addition, isolation
The heat resistance of layer itself also makes the heat resistance of provided anode electrode of lithium ion battery be guaranteed.
In order to achieve the goal above, the invention is realized by the following technical scheme.
The present invention provides a kind of anode electrode of lithium ion battery, and the structure of the anode electrode of lithium ion battery is successively distinguished
For barrier layer, electrode active material layer, current collector layer, electrode active material layer, barrier layer；
The electrode active material layer is solid-state, including uniformly mixed positive electrode active materials, first adhesive, conduction
Agent, the general formula of the positive electrode active materials are Lix(NiyCozMnv)O2, wherein 1≤x≤1.1,0.5≤y≤1,0.0≤z≤
0.20,0.0≤v≤0.3, and y+z+v=1；
The barrier layer is solid-state, including uniformly mixed barrier material, second adhesive, dispersing agent, the barrier
Layer material is selected from Al2O3、AlPO4, any one in ZnO, MgO.
Preferably, the barrier material is micron or nano-scale particle.
Preferably, positive electrode active materials in the electrode active material layer, first adhesive, conductive agent mass ratio be
90-98:1-9.5:0.5-5；Barrier material in the barrier layer, second adhesive, dispersing agent mass ratio be 90-98.5:
1-7:0.5-5.
Preferably, the first adhesive and second adhesive include polyvinylidene fluoride；The conductive agent includes carbon
Material；The dispersing agent includes polyvinylpyrrolidone.
Preferably, the current collector layer is the metallic film containing aluminium, and the quality containing aluminium is more than or equal to 99%, the current collection
Body layer with a thickness of 12~20um.
A second object of the present invention is to provide a kind of methods for preparing anode electrode of lithium ion battery, including following step
It is rapid:
The preparation of electrode active material slurry: mixing adhesive and partial solvent and be stirred, adhesive and solvent
Mass ratio be 4%~8%, glue is made, glue colo is milky or partially pale yellow, and positive electrode active materials and conduction is added
Agent is stirred under vacuum 4~12 hours, and residual solvent, which is added, makes viscosity to 4.5~7.0kpa ﹒ s, and electrode active material slurry is made；
Coating one: obtained electrode active material slurry, coating thickness are respectively coated in two outer surfaces of current collector layer
For 80~120um, it is baked to drying, obtains electrode active material layer；
The preparation of barrier layer slurry: mixing adhesive and partial solvent and be stirred, the quality of adhesive and solvent
Than being 4%~8%, glue is made, after glue colo is pale yellow for milky or partially, barrier material is added, stirring 10~24 is small
When, dispersing agent is added, is stirred 0.5~1 hour, residual solvent, which is added, makes viscosity to 2.0~4.5kpa ﹒ s, and barrier layer is made
Grain slurry；
Coating two: obtained barrier layer particle slurry being respectively coated in the outer surface of two electrode active material layers, applies
It covers with a thickness of 5~20um, is baked to obtain barrier layer, anode electrode of lithium ion battery as described above is made.
When preferably, the described adhesive in the preparation of the step electrode active material and solvent are mixed with glue
Revolving speed is 10~40r/min, and the vacuum degree of vacuum stirring is -500~-700mmHg, mixing speed is 1000~3000r/min；
The mixing speed after addition barrier material in the preparation of the step barrier layer slurry is 1000~3000r/min, is added
Mixing speed after dispersing agent is 10~40r/min.
Preferably, the baking temperature in the step coating one is 100~160 DEG C, and baking time is 3~10min, coating
When coating speed be 5~15m/min, coated face density be 15~26mg/cm2。
Preferably, the baking temperature in step coating two is 90~120 DEG C, and baking time is 1~6min, when coating
Coating speed is 10~30m/min, and coated face density is 1.5~5mg/cm2。
Preferably, the solvent includes N-Methyl pyrrolidone；It is described molten in the preparation of the step electrode active material
Agent and the mass ratio of the positive electrode active materials, adhesive, conductive agent three's gross mass are 60-70:100；The step barrier
In the preparation of layer slurry, the solvent and the mass ratio of the interlayer material, adhesive, dispersing agent three's gross mass are 60-80:
100。
Compared with prior art, the beneficial effects of the present invention are:
(1) the present invention provides a kind of anode electrode of lithium ion battery, the structure of the anode electrode of lithium ion battery according to
Secondary is respectively barrier layer, electrode active material layer, current collector layer, electrode active material layer, barrier layer；In two electrode actives
The outer surface of property material layer substance has been covered each by barrier layer, has carried out insulation blocking effect to electrode active material layer, has prevented
Electrode active material layer directly contacts with electrolyte and side reaction occurs, in addition, the heat resistance of separation layer itself also makes the present invention
The heat resistance of provided anode electrode of lithium ion battery is guaranteed.
(2) the present invention provides a kind of methods for preparing anode electrode of lithium ion battery, by two electrode actives
Barrier layer is respectively coated in the outer surface of property material layer substance, so that electrode active material layer is isolated from the outside, to improve lithium
The stability of ion battery anode electrode.
(3) in some preferred embodiments of the invention, the barrier material in the barrier layer is preferably Al2O3, Al2O3Fusing point
It is 2054 DEG C, boiling point is 2980 DEG C, has very high thermal stability and chemical inertness, Al2O3It can avoid tertiary cathode material and electricity
The contact for solving liquid, so that the generation of the side reaction of tertiary cathode material and electrolyte is reduced, in addition, Al2O3It can be with circulating battery mistake
The HF generated in journey reacts, so that HF be made to reduce, avoids HF from causing battery capacity decaying serious, improves lithium battery tertiary
The service life and safety in utilization of positive electrode, in addition, Al2O3Thermal stability and chemical inertness make lithium provided by the present invention
Ion battery anode electrode has certain thermal stability and chemical inertness.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, it is described in detail below with some embodiments.A specific embodiment of the invention
It is shown in detail by following embodiment.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural diagram of the present invention；
In figure: 1, current collector layer；2, motor active material layer；3, barrier layer.
Specific embodiment
In order to which invention described herein can be more fully understood by, following embodiment is illustrated.It should understand that these embodiments
It being merely to illustrate property purpose and is understood not to limit the invention in any way.
Embodiment 1
As shown in Figure 1, the present invention provides a kind of anode electrode of lithium ion battery, the knot of the anode electrode of lithium ion battery
Structure respectively is barrier layer 3, electrode active material layer 2, current collector layer 1, electrode active material layer 2, barrier layer 3；
The electrode active material layer 2 is solid-state, including uniformly mixed positive electrode active materials, first adhesive, conduction
Agent, the general formula of the positive electrode active materials are Lix(NiyCozMnv)O2, wherein 1≤x≤1.1,0.5≤y≤1,0.0≤z≤
0.20,0.0≤v≤0.3, and y+z+v=1；
The barrier layer 3 is solid-state, including uniformly mixed barrier material, second adhesive, dispersing agent, the barrier
Layer material is selected from Al2O3、AlPO4, any one in ZnO, MgO, the preferred Al of barrier material2O3；Al2O3Fusing point is 2054
DEG C, boiling point is 2980 DEG C, has very high thermal stability and chemical inertness, reduces the generation of safety accident.
Wherein, the positive electrode active materials Lix(NiyCozMnv)O2It is a kind of nickel-cobalt-manganternary ternary anode material of lithium battery.
In a preferred embodiment, the barrier material is micron or nano-scale particle.
In a preferred embodiment, the first adhesive and second adhesive are polyvinylidene fluoride, and described first
The effect of adhesive is to increase the bond strength of active material layer and current collector layer, and the effect of the second adhesive is to increase resistance
The bond strength of interlayer and active material layer.
In a preferred embodiment, the conductive agent includes carbon material, and the effect of the conductive agent is to increase active material
Electric conductivity.
In a preferred embodiment, the dispersing agent includes polyvinylpyrrolidone, and the effect of the dispersing agent is to improve
The dispersion performance of barrier material.
The current collector layer 1 is the metallic film containing aluminium, and the quality of contained aluminium is more than or equal to 99%, the collector
Layer 1 with a thickness of 12~20um.
Positive electrode active materials in the electrode active material layer 2, adhesive, conductive agent mass ratio be 90-98:1-9.5:
0.5-5。
Barrier material in the barrier layer 3, adhesive, dispersing agent mass ratio be 90-98.5:1-7:0.5-5.
The length of the electrode active material layer 2 is consistent with the length of the barrier layer 3, the length of the current collector layer 1
Greater than the length of the electrode active material layer 2, the both ends of the current collector layer 1 are exposed outside, to the tab as battery.
The present invention also provides a kind of methods for preparing anode electrode of lithium ion battery, comprising the following steps:
The preparation of electrode active material slurry: mixing adhesive and partial solvent and be stirred, adhesive and solvent
Mass ratio be 4%~8%, glue is made, glue colo is milky or partially pale yellow, and positive electrode active materials and conduction is added
Agent is stirred under vacuum 4~12 hours, and residual solvent, which is added, makes viscosity to 4.5~7.0kpa ﹒ s, and electrode active material slurry is made；
Coating one: obtained electrode active material slurry, coating thickness are respectively coated in 1 two outer surfaces of current collector layer
For 80~120um, it is baked to drying, obtains electrode active material layer 2；
The preparation of barrier layer slurry: mixing adhesive and partial solvent and be stirred, the quality of adhesive and solvent
Than being 4%~8%, glue is made, after glue colo is pale yellow for milky or partially, barrier material is added, stirring 10~24 is small
When, dispersing agent is added, is stirred 0.5~1 hour, residual solvent, which is added, makes viscosity to 2.0~4.5kpa ﹒ s, and barrier layer pottery is made
Porcelain particle slurry；
Coating two: obtained barrier layer ceramic particle slurry is respectively coated in the outer surface of two electrode active material layers
Material, coating thickness are 5~20um, are baked to drying, obtain anode electrode of lithium ion battery as described in Example 1.
In a preferred embodiment, the solvent is N-Methyl pyrrolidone.
In a preferred embodiment, the barrier material is micron or nano-scale particle.
In a preferred embodiment, the first adhesive and second adhesive are polyvinylidene fluoride, and described first
The effect of adhesive is to increase the bond strength of active material layer and current collector layer, and the effect of the second adhesive is to increase resistance
The bond strength of interlayer and active material layer.
In a preferred embodiment, the conductive agent includes carbon material, and the effect of the conductive agent is to increase active material
Electric conductivity.
In a preferred embodiment, the dispersing agent includes polyvinylpyrrolidone, and the effect of the dispersing agent is to improve
The dispersion performance of barrier material.
The current collector layer 1 is the metallic film containing aluminium, and the quality of contained aluminium is more than or equal to 99%, the collector
Layer 1 with a thickness of 12~20um.
Positive electrode active materials in the electrode active material layer 2, adhesive, conductive agent mass ratio be 90-98:1-9.5:
0.5-5。
Barrier material in the barrier layer 3, adhesive, dispersing agent mass ratio be 90-98.5:1-7:0.5-5.
The length of the electrode active material layer 2 is consistent with the length of the barrier layer 3, the length of the current collector layer 1
Greater than the length of the electrode active material layer 2, the both ends of the current collector layer 1 are exposed outside, to the tab as battery.
In the preparation of the step electrode active material, the solvent and the positive electrode active materials, adhesive, conductive agent
The mass ratio of three's gross mass is 60-70:100.
In the preparation of the step barrier layer slurry, the solvent and the interlayer material, adhesive, dispersing agent three are total
The mass ratio of quality is 60-80:100.
Baking temperature in step coating one is 100~160 DEG C, and baking time is 3~10min, and when coating is coated with
Speed is 5~15m/min, and coated face density is 15~26mg/cm2。
Baking temperature in step coating two is 90~120 DEG C, and baking time is 1~6min, coating speed when coating
Degree is 10~30m/min, and coated face density is 1.5~5mg/cm2。
It is illustrated below with specific embodiment, it should be noted that being merely to illustrate property of following embodiment purpose and not answering
It is understood to limit the invention in any way.
Embodiment 2
The present invention provides a kind of methods for preparing anode electrode of lithium ion battery, the specific steps are as follows:
(1) each raw material is got ready by the proportion of table one
Table one
(2) preparation of electrode active material slurry
It is calculated needed for adhesive by the mass ratio of adhesive polyvinylidene fluoride and solvent N-methyl pyrilidone for 7%
The quality of solvent, N-Methyl pyrrolidone is divided into two parts, by polyvinylidene fluoride and this partial solvent N-Methyl pyrrolidone
It mixing and is stirred, mixing time 1 hour, glue was made in revolving speed 40r/min, and stirring is uniformly dispersed unanimously until glue,
Without obvious granular sensation, glue colo is milky or partially pale yellow rear stopping stirring.It is added ready in step (1)
LiNi5Co2Mn3O2And carbon material, it is stirred under vacuum 4 hours, vacuum degree is -660mmHg, mixing speed 3000r/min.It is added
Residual solvent N-Methyl pyrrolidone makes viscosity to 6kpa ﹒ s, and electrode active material slurry is made；
(3) one is coated
Take current collector layer 1, containing quality be more than or equal to 99% aluminium metallic film, current collector layer 1 with a thickness of 16um, In
Two outer surfaces of current collector layer 1 are respectively coated electrode active material slurry obtained by step (2), coating thickness 100um,
Coating speed is 10m/min, coated face density 19.75mg/cm when coating2, toasted after the completion of coating, baking temperature is
120 DEG C, baking time 4.5min is baked to drying, obtains electrode active material layer 2；Wherein, two appearances of current collector layer 1
The deviation of the coating thickness of the electrode active material layer in face is less than 5%；
(4) preparation of barrier layer slurry
It is calculated needed for adhesive by the mass ratio of adhesive polyvinylidene fluoride and solvent N-methyl pyrilidone for 7%
The quality of solvent, N-Methyl pyrrolidone is divided into two parts, by polyvinylidene fluoride and this partial solvent N-Methyl pyrrolidone
Mix and be stirred, mixing speed 30r/min, mixing time be 3 hours, be made glue, glue colo be milky or
After partially pale yellow, barrier material Al is added2O3, mixing speed 1500r/min, stir 18 hours, add polyethylene of dispersing agent
Pyrrolidones, mixing speed 40r/min are stirred 0.5 hour, and residual solvent, which is added, makes viscosity to 4.5kpa ﹒ s, and barrier is made
Layer particle slurry；
(5) two are coated
Barrier layer particle slurry obtained by step (4) is respectively coated in the outer surface of two electrode active material layers 2, applies
It covers with a thickness of 15um, coating speed is 20m/min, coated face density 3.8mg/cm when coating2, dried after the completion of coating
Roasting, baking temperature is 120 DEG C, baking time 2.5min, is baked to obtain barrier layer 3, and lithium ion cell positive electricity is made
Pole.
Anode electrode of lithium ion battery obtained by the present embodiment, compared with existing tertiary cathode material, existing
Two outer surfaces of tertiary cathode material are coated with barrier layer 3, the Al in the barrier layer 32O3, make tertiary cathode material
LiNi5Co2Mn3O2It is isolated and comes between electrolyte, reduce LiNi5Co2Mn3O2With electrolyte side reaction, inhibit metal ion
Dissolution, in addition, Al2O3With very high thermal stability and chemical inertness, Al2O3The diffusion of high temperature high fever can be reduced, thus
Reduce the generation of safety accident.
Embodiment 3
(1) each raw material is got ready by the proportion of table two
Table two
(2) preparation of electrode active material slurry
It is calculated needed for adhesive by the mass ratio of adhesive polyvinylidene fluoride and solvent N-methyl pyrilidone for 4%
The quality of solvent, N-Methyl pyrrolidone is divided into two parts, by polyvinylidene fluoride and this partial solvent N-Methyl pyrrolidone
It mixing and is stirred, mixing time 5 hours, glue was made in revolving speed 10r/min, and stirring is uniformly dispersed unanimously until glue,
Without obvious granular sensation, glue colo is milky or partially pale yellow rear stopping stirring.It is added ready in step (1)
LiNi5Co2Mn3O2And carbon material, it is stirred under vacuum 12 hours, vacuum degree is -700mmHg, mixing speed 1000r/min.It is added
Residual solvent N-Methyl pyrrolidone makes viscosity to 4.5kpa ﹒ s, and electrode active material slurry is made；
(3) one is coated
Take current collector layer 1, be more than the metallic film of 99% aluminium containing quality, current collector layer 1 with a thickness of 12um, in current collection
Electrode active material slurry obtained by step (2), coating thickness 120um, coating is respectively coated in two outer surfaces of body layer 1
When coating speed be 5m/min, coated face density 26mg/cm2, toasted after the completion of coating, baking temperature is 160 DEG C, is dried
The roasting time is 3min, is baked to drying, obtains electrode active material layer 2；Wherein, the electrode active of two outer surfaces of current collector layer 1
The deviation of the coating thickness of property material layer is less than 5%；
(4) preparation of barrier layer slurry
It is calculated needed for adhesive by the mass ratio of adhesive polyvinylidene fluoride and solvent N-methyl pyrilidone for 4%
The quality of solvent, N-Methyl pyrrolidone is divided into two parts, by polyvinylidene fluoride and this partial solvent N-Methyl pyrrolidone
Mix and be stirred, mixing speed 10r/min, mixing time be 5 hours, be made glue, glue colo be milky or
After partially pale yellow, barrier material Al is added2O3, mixing speed 1000r/min, stir 24 hours, add polyethylene of dispersing agent
Pyrrolidones, mixing speed 10r/min are stirred 1 hour, and residual solvent, which is added, makes viscosity to 2.0kpa ﹒ s, and barrier layer is made
Particle slurry；
(5) two are coated
Barrier layer particle slurry obtained by step (4) is respectively coated in the outer surface of two electrode active material layers 2, applies
It covers with a thickness of 5um, coating speed is 30m/min, coated face density 1.5mg/cm when coating2, it is toasted after the completion of coating,
Baking temperature is 80 DEG C, baking time 1min, is baked to obtain barrier layer 3, and anode electrode of lithium ion battery is made.
Embodiment 4
(1) each raw material is got ready by the proportion of table three
Table three
(2) preparation of electrode active material slurry
It is calculated needed for adhesive by the mass ratio of adhesive polyvinylidene fluoride and solvent N-methyl pyrilidone for 8%
The quality of solvent, N-Methyl pyrrolidone is divided into two parts, by polyvinylidene fluoride and this partial solvent N-Methyl pyrrolidone
It mixing and is stirred, mixing time 2 hours, glue was made in revolving speed 30r/min, and stirring is uniformly dispersed unanimously until glue,
Without obvious granular sensation, glue colo is milky or partially pale yellow rear stopping stirring.It is added ready in step (1)
LiNi5Co2Mn3O2And carbon material, it is stirred under vacuum 8 hours, vacuum degree is -500mmHg, mixing speed 1500r/min.It is added
Residual solvent N-Methyl pyrrolidone makes viscosity to 7kpa ﹒ s, and electrode active material slurry is made；
(3) one is coated
Take current collector layer 1, be more than the metallic film of 99% aluminium containing quality, current collector layer 1 with a thickness of 20um, in current collection
Electrode active material slurry obtained by step (2), coating thickness 80um, coating is respectively coated in two outer surfaces of body layer 1
When coating speed be 5m/min, coated face density 15mg/cm2, toasted after the completion of coating, baking temperature is 140 DEG C, is dried
The roasting time is 10min, is baked to drying, obtains electrode active material layer 2；Wherein, the electrode active of two outer surfaces of current collector layer 1
The deviation of the coating thickness of property material layer is less than 5%；
(4) preparation of barrier layer slurry
It is calculated needed for adhesive by the mass ratio of adhesive polyvinylidene fluoride and solvent N-methyl pyrilidone for 8%
The quality of solvent, N-Methyl pyrrolidone is divided into two parts, by polyvinylidene fluoride and this partial solvent N-Methyl pyrrolidone
Mix and be stirred, mixing speed 40r/min, mixing time be 1 hour, be made glue, glue colo be milky or
After partially pale yellow, barrier material Al is added2O3, mixing speed 3000r/min, stir 10 hours, add polyethylene of dispersing agent
Pyrrolidones, mixing speed 30r/min are stirred 0.7 hour, and residual solvent, which is added, makes viscosity to 3.0kpa ﹒ s, and barrier is made
Layer particle slurry；
(5) two are coated
Barrier layer particle slurry obtained by step (4) is respectively coated in the outer surface of two electrode active material layers 2, applies
It covers with a thickness of 20um, coating speed is 10m/min, coated face density 5mg/cm when coating2, it is toasted after the completion of coating,
Baking temperature is 120 DEG C, baking time 6min, is baked to obtain barrier layer 3, and anode electrode of lithium ion battery is made.
As shown in Table 4, embodiment 5 is to the insolated layer materials of embodiment 9 and comparative example 1, the surface density of separation layer and implementation
Example 2 is slightly different, and other technical characteristics are as the parameter of embodiment 2.
Table four
Anode electrode of lithium ion battery obtained by embodiment 2, embodiment 5 to embodiment 9 and comparative example 1 is with charge and discharge
The capacity retention ratio of the increase of number, anode electrode of lithium ion battery is shown in Table five.
Table five
As shown in Table 5, it is once one cycle that cycle-index, which indicates that lithium ion battery is charged and discharged each,.Comparative example 1 is
The case of coating barrier layer measure is not done in anode electrode of lithium ion battery outer surface, in the process of lithium ion battery charge and discharge
In, with the increase of cycle-index, the capacity retention ratio of the anode electrode of lithium ion battery of comparative example 1 is lower than embodiment 2, implementation
Example 5 to the anode electrode of lithium ion battery into embodiment 9 capacity retention ratio, it is right and as cycle-index is increased more
The capacity retention ratio of ratio 1 and the gap of the capacity retention ratio of embodiment 2, embodiment 5 are bigger.In addition, embodiment 2,5,6 is resistance
Interlayer material is Al2O3, embodiment 7,8,9 is that barrier material is AlPO respectively4, ZnO, MgO, the surface density of barrier coated
It is 5mg/cm2When, barrier material Al2O3When, the barrier protection of anode electrode of lithium ion battery is acted on more preferably, lithium is made
The capacity retention ratio of ion battery anode electrode is high.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and embodiment shown here.
Claims (10)
1. a kind of anode electrode of lithium ion battery, which is characterized in that the structure of the anode electrode of lithium ion battery is successively distinguished
For barrier layer 3, electrode active material layer 2, current collector layer 1, electrode active material layer 2, barrier layer 3；
The electrode active material layer 2 is solid-state, including uniformly mixed positive electrode active materials, first adhesive, conductive agent, institute
The general formula for stating positive electrode active materials is Lix(NiyCozMnv)O2, wherein 1≤x≤1.1,0.5≤y≤1,0.0≤z≤0.20,
0.0≤v≤0.3, and y+z+v=1；
The barrier layer 3 is solid-state, including uniformly mixed barrier material, second adhesive, dispersing agent, the barrier layer material
Material is selected from Al2O3、AlPO4, any one in ZnO, MgO.
2. a kind of anode electrode of lithium ion battery according to claim 1, which is characterized in that the barrier material is micro-
Rice or nano-scale particle.
3. a kind of anode electrode of lithium ion battery according to claim 1, which is characterized in that the electrode active material layer
Positive electrode active materials in 2, first adhesive, conductive agent mass ratio be 90-98:1-9.5:0.5-5；It is hindered in the barrier layer 3
Interlayer material, second adhesive, dispersing agent mass ratio be 90-98.5:1-7:0.5-5.
4. a kind of anode electrode of lithium ion battery according to claim 1, which is characterized in that the first adhesive and
Two adhesives include polyvinylidene fluoride；The conductive agent includes carbon material；The dispersing agent includes polyvinylpyrrolidone.
5. a kind of anode electrode of lithium ion battery according to claim 1, which is characterized in that the current collector layer 1 be containing
Have the metallic film of aluminium, the quality containing aluminium be more than or equal to 99%, the current collector layer 1 with a thickness of 12~20um.
6. a kind of method for preparing anode electrode of lithium ion battery, which comprises the following steps:
The preparation of electrode active material slurry: mixing adhesive and partial solvent and be stirred, the matter of adhesive and solvent
Than being 4%~8% glue is made, glue colo is milky or partially pale yellow, positive electrode active materials and conductive agent is added, very in amount
Sky stirring 4~12 hours, residual solvent, which is added, makes viscosity to 4.5~7.0kpa ﹒ s, and electrode active material slurry is made；
Coating one: obtained electrode active material slurry, coating thickness 80 are respectively coated in 1 two outer surfaces of current collector layer
~120um is baked to drying, obtains electrode active material layer 2；
The preparation of barrier layer slurry: mixing adhesive and partial solvent and be stirred, and the mass ratio of adhesive and solvent is
4%~8%, glue is made, after glue colo is pale yellow for milky or partially, barrier material is added, stirs 10~24 hours, then
Dispersing agent is added, stirs 0.5~1 hour, residual solvent, which is added, makes viscosity to 2.0~4.5kpa ﹒ s, and barrier layer particle slurry is made
Material；
Coating two: obtained barrier layer particle slurry being respectively coated in the outer surface of two electrode active material layers, and coating is thick
Degree is 5~20um, is baked to obtain barrier layer 3, and the lithium ion cell positive as described in claim 1-5 any one is made
Electrode.
7. a kind of method for preparing anode electrode of lithium ion battery according to claim 6, which is characterized in that the step
Revolving speed when described adhesive and solvent in the preparation of electrode active material are mixed with glue is 10~40r/min, vacuum
The vacuum degree of stirring is -500~-700mmHg, mixing speed is 1000~3000r/min；The system of the step barrier layer slurry
The mixing speed after addition barrier material in standby is 1000~3000r/min, and the mixing speed after dispersing agent is added is 10
~40r/min.
8. a kind of method for preparing anode electrode of lithium ion battery according to claim 6, which is characterized in that the step
Baking temperature in coating one is 100~160 DEG C, and baking time is 3~10min, and coating speed is 5~15m/min when coating,
Coated face density is 15~26mg/cm2。
9. a kind of method for preparing anode electrode of lithium ion battery according to claim 6, which is characterized in that the step
Baking temperature in coating two is 90~120 DEG C, and baking time is 1~6min, and coating speed is 10~30m/min when coating,
Coated face density is 1.5~5mg/cm2。
10. a kind of method for preparing anode electrode of lithium ion battery according to claim 6, which is characterized in that described molten
Agent includes N-Methyl pyrrolidone；In the preparation of the step electrode active material, the solvent and the positive electrode active materials,
Adhesive, conductive agent three's gross mass mass ratio be 60-70:100；It is described molten in the preparation of the step barrier layer slurry
Agent and the mass ratio of the interlayer material, adhesive, dispersing agent three's gross mass are 60-80:100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910748492.5A CN110504407A (en) | 2019-08-14 | 2019-08-14 | A kind of anode electrode of lithium ion battery, preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910748492.5A CN110504407A (en) | 2019-08-14 | 2019-08-14 | A kind of anode electrode of lithium ion battery, preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110504407A true CN110504407A (en) | 2019-11-26 |
Family
ID=68587329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910748492.5A Pending CN110504407A (en) | 2019-08-14 | 2019-08-14 | A kind of anode electrode of lithium ion battery, preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110504407A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952032A (en) * | 2021-03-01 | 2021-06-11 | 珠海冠宇动力电池有限公司 | Positive plate and battery |
| CN114256518A (en) * | 2020-09-25 | 2022-03-29 | 珠海冠宇电池股份有限公司 | Positive pole piece and lithium ion battery comprising same |
| CN114256518B (en) * | 2020-09-25 | 2024-04-26 | 珠海冠宇电池股份有限公司 | Positive electrode plate and lithium ion battery comprising same |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101192682A (en) * | 2006-11-21 | 2008-06-04 | 比亚迪股份有限公司 | Lithium-ion secondary cell and manufacture method thereof |
| CN102122708A (en) * | 2010-01-08 | 2011-07-13 | 中国科学院物理研究所 | Negative pole material for lithium-ion secondary battery, negative pole containing negative pole material, preparation method of negative pole and battery containing negative pole |
| CN103811727A (en) * | 2013-12-18 | 2014-05-21 | 上海航天电源技术有限责任公司 | Security lithium ion battery positive plate as well as preparation method thereof |
| CN104752728A (en) * | 2013-12-30 | 2015-07-01 | 现代自动车株式会社 | Surface-treated cathode active material and lithium secondary battery using the same |
| CN105449159A (en) * | 2015-03-12 | 2016-03-30 | 万向A一二三系统有限公司 | Positive plate of lithium-ion battery with high safety performance and fabrication method of positive plate |
| CN105612634A (en) * | 2014-09-12 | 2016-05-25 | 株式会社Lg化学 | Method for preparing cathode material for lithium secondary battery, cathode material for lithium secondary battery, and lithium secondary battery containing same |
| CN106654166A (en) * | 2016-11-17 | 2017-05-10 | 浙江超威创元实业有限公司 | Slurry-homogenizing process for positive electrode slurry of lithium ion battery, positive electrode plate and lithium ion battery |
| CN107331861A (en) * | 2016-04-28 | 2017-11-07 | 万向二三股份公司 | A kind of based lithium-ion battery positive plate and preparation method thereof |
| CN107634177A (en) * | 2017-07-24 | 2018-01-26 | 中国科学院上海微系统与信息技术研究所 | A kind of LiFePO4 combination electrode of surface metal oxide coating |
-
2019
- 2019-08-14 CN CN201910748492.5A patent/CN110504407A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101192682A (en) * | 2006-11-21 | 2008-06-04 | 比亚迪股份有限公司 | Lithium-ion secondary cell and manufacture method thereof |
| CN102122708A (en) * | 2010-01-08 | 2011-07-13 | 中国科学院物理研究所 | Negative pole material for lithium-ion secondary battery, negative pole containing negative pole material, preparation method of negative pole and battery containing negative pole |
| CN103811727A (en) * | 2013-12-18 | 2014-05-21 | 上海航天电源技术有限责任公司 | Security lithium ion battery positive plate as well as preparation method thereof |
| CN104752728A (en) * | 2013-12-30 | 2015-07-01 | 现代自动车株式会社 | Surface-treated cathode active material and lithium secondary battery using the same |
| CN105612634A (en) * | 2014-09-12 | 2016-05-25 | 株式会社Lg化学 | Method for preparing cathode material for lithium secondary battery, cathode material for lithium secondary battery, and lithium secondary battery containing same |
| CN105449159A (en) * | 2015-03-12 | 2016-03-30 | 万向A一二三系统有限公司 | Positive plate of lithium-ion battery with high safety performance and fabrication method of positive plate |
| CN107331861A (en) * | 2016-04-28 | 2017-11-07 | 万向二三股份公司 | A kind of based lithium-ion battery positive plate and preparation method thereof |
| CN106654166A (en) * | 2016-11-17 | 2017-05-10 | 浙江超威创元实业有限公司 | Slurry-homogenizing process for positive electrode slurry of lithium ion battery, positive electrode plate and lithium ion battery |
| CN107634177A (en) * | 2017-07-24 | 2018-01-26 | 中国科学院上海微系统与信息技术研究所 | A kind of LiFePO4 combination electrode of surface metal oxide coating |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256518A (en) * | 2020-09-25 | 2022-03-29 | 珠海冠宇电池股份有限公司 | Positive pole piece and lithium ion battery comprising same |
| WO2022062890A1 (en) * | 2020-09-25 | 2022-03-31 | 珠海冠宇电池股份有限公司 | Positive electrode plate and lithium-ion battery comprising same |
| CN114256518B (en) * | 2020-09-25 | 2024-04-26 | 珠海冠宇电池股份有限公司 | Positive electrode plate and lithium ion battery comprising same |
| CN112952032A (en) * | 2021-03-01 | 2021-06-11 | 珠海冠宇动力电池有限公司 | Positive plate and battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108878775A (en) | It is a kind of to mend lithium composite negative pole pole piece and preparation method thereof safely | |
| CN109755557A (en) | A kind of safe high-voltage high-energy-density lithium ion battery and preparation method thereof | |
| CN105680025B (en) | A kind of anode material of lithium battery and preparation method thereof and lithium battery | |
| CN102969548B (en) | A kind of lithium-ion energy storage device and preparation method thereof | |
| CN106299282B (en) | Nitrogen-doped carbon nanotube sulfur composite material and preparation method thereof | |
| CN111916678B (en) | High specific energy lithium battery electrode, dry preparation method thereof and lithium battery | |
| CN107863514A (en) | 622 type nickel-cobalt-manganternary ternary anode materials and preparation method thereof are covered in double-contracting | |
| CN107017387A (en) | It is a kind of for composite positive pole of solid lithium ion battery and preparation method thereof | |
| CN109888252B (en) | Co-coated nickel-cobalt-manganese ternary positive electrode material and preparation method thereof | |
| CN102237517A (en) | Lithium ion battery, cathode composite material and preparation methods thereof | |
| CN110504407A (en) | A kind of anode electrode of lithium ion battery, preparation method | |
| CN108232120B (en) | Synthesis of solid-state lithium battery and preparation method of graphite composite negative plate and lithium iron phosphate composite positive plate | |
| CN108807982A (en) | A kind of making formula of the positive electrode of high compacted density | |
| Dong et al. | Nanoscale Borate Coating Network Stabilized Iron Oxide Anode for High‐Energy‐Density Bipolar Lithium‐Ion Batteries | |
| JP2017224427A (en) | Solid electrolyte and battery | |
| CN111952597A (en) | Composite positive plate, preparation method thereof and solid-state battery | |
| CN107959021A (en) | A kind of preparation method of cylinder nickle cobalt lithium manganate power battery | |
| JP3243239B2 (en) | Method for producing positive electrode for non-aqueous secondary battery | |
| CN112289995A (en) | Composite positive electrode slurry, positive electrode plate and solid-state battery | |
| CN111029559A (en) | Lithium titanate battery and preparation method thereof | |
| WO2024021277A1 (en) | Ternary positive electrode material and preparation method therefor, positive electrode sheet and battery | |
| CN112563462A (en) | High-voltage composite anode material and lithium ion battery containing same | |
| CN103855406A (en) | Positive electrode for lithium-air cell, preparation method and applications thereof | |
| CN115911529A (en) | Composite garnet type solid electrolyte, secondary battery and preparation method | |
| CN111916836B (en) | Lithium battery positive plate and solid electrolyte combined plate and preparation method thereof |
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 |
Application publication date: 20191126 |
|
| RJ01 | Rejection of invention patent application after publication |