CN109037592A - Lithium ion battery positive plate, preparation method thereof and lithium ion battery - Google Patents
Lithium ion battery positive plate, preparation method thereof and lithium ion battery Download PDFInfo
- Publication number
- CN109037592A CN109037592A CN201710430473.9A CN201710430473A CN109037592A CN 109037592 A CN109037592 A CN 109037592A CN 201710430473 A CN201710430473 A CN 201710430473A CN 109037592 A CN109037592 A CN 109037592A
- Authority
- CN
- China
- Prior art keywords
- ion battery
- positive plate
- active material
- battery positive
- transition zone
- 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
- 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
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a lithium ion battery positive plate which comprises a current collector, a transition layer arranged on the current collector and an active material layer arranged on the transition layer, wherein the transition layer comprises a first active material, a first conductive agent and a first binder, and the first conductive agent is a zero-dimensional conductive material. Compared with the prior art, the transition layer is arranged in the lithium ion battery positive plate, and the conductive agent of the transition layer is made of the zero-dimensional conductive material, so that the bonding force between the active material layer and the current collector is increased, the contact resistance is improved, the problem of poor bonding between the slurry and the current collector is effectively solved, the complete positive plate can be obtained after compaction, and the cycle performance of the battery can be improved. In addition, the invention also discloses a preparation method of the lithium ion battery positive plate and a lithium ion battery comprising the lithium ion battery positive plate.
Description
Technical field
The invention belongs to field of batteries, it is more particularly related to a kind of based lithium-ion battery positive plate and its preparation
Method, lithium ion battery.
Background technique
When lithium ion battery works, abjection and insertion of the lithium ion between positive and negative anodes, it is desirable that positive and negative pole material has height
The features such as chemical stability, high conductivity.As electrode material important component, conductive agent has the performance of battery very big
It influences.
In conventional electrodes of lithium-ion batteries manufacture craft, active material slurry is directly coated at aluminium foil or copper foil afflux
The electronics that electrochemical reaction generates is collected by the physical contact with active material and is exported to dispatch from foreign news agency by body surface face, collector
Road, to realize that chemical energy is converted into the process of electric energy.It follows that the contact between collector and active material is lithium-ion electric
The important factor in order of pond charge-discharge performance.However, between the biggish active material particle of metal collector and partial size of rigidity
Contact area is limited, and interface resistance is larger, this will cause the rising of the internal resistance of cell, and battery performance especially high current is filled
There is negative effect in the performance under discharging condition.
For the electric conductivity for improving conductive agent, the interface resistance between collector and active material is reduced, is improved between the two
Adhesion strength, emerging one-dimensional electric material (line-shaped conductive material) and two-dimentional conductive material (flake conductive material) are successively in electricity
It is used in core.However, a peacekeeping two dimension conductive carbon material is mostly nanometer materials, specific surface area is larger, and imbibition ability is stronger,
The solid content of slurry is low, and during drying, solvent is diffused into surface from bottom and then volatilizees away, so that bonding agent is in pole
There is concentration gradient in distribution in piece, and pole piece concentration is high, and collection liquid surface concentration is low, between active material and collector
Cohesive force is poor.The introducing of these materials also brings very big trouble to the processing technology of pole piece, usually will appear after cold pressing
Positive-active species bonding seriously affects following for battery loosely and the phenomenon that demoulding after peeling, picking and fresh cells dismantling
Ring high rate performance.
In view of this, it is necessory to provide it is a kind of can improve between collector and active material adhesion strength and improve battery follow
Based lithium-ion battery positive plate of ring high rate performance and preparation method thereof, lithium ion battery.
Summary of the invention
Goal of the invention of the invention is: overcoming the deficiencies of the prior art and provide a kind of can improve collector and active material
Adhesion strength and the based lithium-ion battery positive plate for improving circulating battery high rate performance and preparation method thereof, lithium ion battery between material.
In order to achieve the above-mentioned object of the invention, the present invention provides a kind of based lithium-ion battery positive plates comprising collector is set
The active material layer setting transition zone on a current collector and being arranged on transition zone, wherein transition zone include the first active material,
First conductive agent and first binder, wherein the first conductive agent is zero dimension conductive material (granular conductive material).
As a kind of improvement of based lithium-ion battery positive plate of the present invention, the transition zone includes the first activity of 15-75wt%
Substance, the first conductive agent of 5-65wt% and 20-80wt% first binder.
Transition zone contains high-content binder, has excellent adhesive property between collector；Contain zero dimension conduction material
Material has good conductive capability, and its specific surface area is relatively small, and the solid content of slurry is higher, in the drying process can be with
It being come into full contact with collector, the coating of formation is comparatively dense, and it is bigger with the bonding force of collector, reduce contact resistance；Contain work
Property substance, can enhance cohesive force and can be reduced the loss of energy density.Transition zone has better shape relative to metal collector
Change ability, therefore transition zone can increase the conductive contact between active material layer and collector, reduce interface resistance, and then improve two
Adhesion strength between person.
As a kind of improvement of based lithium-ion battery positive plate of the present invention, the active material layer includes 80-97wt% second
The second binder of active material, the second conductive agent of 1-10wt% and 2-10wt%.
As a kind of improvement of based lithium-ion battery positive plate of the present invention, first active material and the second active material are only
It is vertical to be selected from ferric phosphate lithium salts, LiNixCoyMzO2At least one of, wherein M be selected from Mn, Al, Zr, Ti, V, Mg, Fe, Mo, x >=
0, y >=0, z >=0, and x+y+z=1.
As a kind of improvement of based lithium-ion battery positive plate of the present invention, second conductive agent is zero dimension conductive material, one
Tie up at least one of conductive material and two-dimentional conductive material.
As a kind of improvement of based lithium-ion battery positive plate of the present invention, the one-dimensional electric material be selected from carbon nano-fiber,
Carbon nanotube, the length of one-dimensional electric material are 3-10nm, average diameter 3-10nm, specific surface area 200-500m2/g。
As a kind of improvement of based lithium-ion battery positive plate of the present invention, the two dimension conductive material is graphene, and two dimension is led
The partial size of electric material is 5-10nm, conductivity 2000-6000s/m, specific surface area 200-400m2/g。
As a kind of improvement of based lithium-ion battery positive plate of the present invention, the second conductive agent is preferably graphene and carbon nanometer
Pipe composite conducting material.Graphene and carbon nanotube composite conducting material have preferable conductive capability and are capable of forming effectively
Good conductive network, using composite conducting material replace traditional conductive agent, can to positive electrode formed it is more perfect
Package increases conductive channel, makes it have higher electronic conductivity, while can reduce the dosage of conductive agent, improves activity
The carrying capacity of substance, to improve the energy density of battery.
As a kind of improvement of based lithium-ion battery positive plate of the present invention, the zero dimension conductive material be selected from conductive black,
One of SUPER P-Li, electrically conductive graphite, Ketjen black, acetylene black are several, and the partial size of the zero dimension conductive material is 15-
65 μm, specific surface area 35-100m2/g。
As a kind of improvement of based lithium-ion battery positive plate of the present invention, the transition zone with a thickness of 2-10 μm.
In order to achieve the above-mentioned object of the invention, the present invention also provides a kind of preparation sides of aforementioned based lithium-ion battery positive plate
Method, comprising the following steps:
1) active material, zero dimension conductive material and binder are dissolved in proportion in solvent and are configured to slurry, in afflux
It is coated on body, forms transition zone after dry；And
2) by active material, binder, and containing in zero dimension conductive material, one-dimensional electric material and two-dimentional conductive material
At least one conductive agent dispersion forms electrocondution slurry in a solvent, and electrocondution slurry is coated on transition zone after mixing evenly
On, based lithium-ion battery positive plate is obtained after dry.
A kind of improvement of preparation method as based lithium-ion battery positive plate of the present invention, in step 2), the electrocondution slurry
Solid content be 5-25wt%.
In order to achieve the above-mentioned object of the invention, invention further provides a kind of lithium ion batteries comprising positive plate is born
Pole piece, the diaphragm and electrolyte being interval between positive plate and negative electrode tab, wherein the positive plate is aforementioned lithium-ion electric
Pond positive plate.
Compared with the existing technology, based lithium-ion battery positive plate of the present invention and preparation method thereof, lithium ion battery have following
Advantageous effects:
Transition zone is provided in positive plate, and the conductive agent in transition zone selects zero dimension conductive material, increases active matter
Cohesive force between matter layer and collector, improves contact resistance, and it is bad to efficiently solve caking property between slurry and collector
The problem of, very complete positive plate can be obtained after compacting, and contain active material in transition zone, can be reduced when enhancing cohesive force
Energy density loss；Active material layer can form good conductive network simultaneously, reduce the dosage of conductive agent, with transition zone phase
In conjunction with the high rate performance and cycle performance that battery can be improved.
Specific embodiment
In order to be more clear goal of the invention of the invention, technical solution and its technical effect, below in conjunction with specific implementation
Mode, the present invention will be described in further detail.It should be understood that specific embodiment described in this specification is only
It is to be not intended to limit the present invention to explain the present invention.
Embodiment 1
1) preparation of positive plate
1. the preparation of transition zone
First active material is LiNi0.5Mn0.3Co0.2O2(NCM523)；First conductive agent is conductive black (SP), SP's
Partial size D90 is 45 μm, and BET (specific surface area) is 48m2/g；First binder is Kynoar (PVDF).
PVDF is dissolved according to a certain percentage in N-Methyl pyrrolidone (NMP) solvent, by a certain amount of NCM523 and
SP, which is added in the PVDF solution dissolved, forms slurry, and the weight ratio that three is added is NCM523:SP:PVDF=30:20:50,
Be coated uniformly on aluminium foil after slurry agitation is uniform, it is dry at 85 DEG C to form transition zone, transition zone with a thickness of 3 μm.
2. the preparation of active material layer
Second active material is LiNi0.5Mn0.3Co0.2O2(NCM523)；Second conductive agent be graphene and carbon nanotube,
Wherein, the D90 of graphene is 5nm, BET 300m2/ g, the D90 of carbon nanotube are 4nm, BET 350m2/g；Second binder
For Kynoar (PVDF).
Graphene and carbon nanotube are added in NMP, the dispersing agent of 0.4-1wt% is added, first stirs 4-12h, then
Ultrasonic vibration 25-35min, supersonic frequency 20-25HZ, power 100W are carried out, the composite guide that solid content is 15wt% is formed
Plasma-based material.
PVDF is dissolved according to a certain percentage in N-Methyl pyrrolidone (NMP) solvent, it then will be a certain amount of
NCM523 and composite conducting slurry are added in the PVDF solution dissolved, weight ratio NCM523: graphene+carbon nanotube:
PVDF=90:5:5 is coated on transition zone after mixing evenly, is cold-pressed cut-parts after dry at 85 DEG C and is obtained positive plate.
2) preparation of negative electrode tab
By butadiene-styrene rubber (SBR) dissolution in aqueous solution, formed SBR aqueous solution, then by a certain amount of artificial graphite, SP and
Sodium carboxymethylcellulose (CMC) is added in SBR aqueous solution, and weight ratio is artificial graphite: Super P:CMC:SBR=90:3:3:
4, after mixing evenly on the copper foil coated in 8 μ m-thicks, cut-parts are cold-pressed after dry at 110 DEG C and obtain negative electrode tab.
3) isolation film
Polypropylene (PP)/polyethylene (PE)/three layers of composite porous film of polypropylene (PP) that isolation film uses with a thickness of 16 μm.
4) preparation of electrolyte
Ethylene carbonate (EC), propene carbonate (PC) and diethyl carbonate (DEC) 1:1:1 in mass ratio are uniformly mixed
Mixed solvent is obtained, lithium hexafluoro phosphate (LiPF is eventually adding6), lithium hexafluoro phosphate (LiPF6) concentration be 1M.
5) battery assembly
The above positive plate, negative electrode tab, isolation film are formed into battery core by winding or lamination process, battery core is then put into packet
In pack, after injecting electrolyte, chemical conversion, encapsulation, capacity etc. are assembled into battery.
Embodiment 2
Embodiment 2 is substantially the same manner as Example 1, the difference is that: the first conductive agent in transition zone is SUPER P-
Li, D90 are 15 μm, BET 35m2/g。
Embodiment 3
Embodiment 3 is substantially the same manner as Example 1, the difference is that: the first conductive agent in transition zone is electrically conductive graphite,
Its D90 is 65 μm, BET 100m2/g。
Embodiment 4
Embodiment 4 is substantially the same manner as Example 1, the difference is that: the first active material, the first conductive agent in transition zone
Mass ratio with first binder is 75:5:20.
Embodiment 5
Embodiment 5 is substantially the same manner as Example 1, the difference is that: the first active material, the first conductive agent in transition zone
Mass ratio with first binder is 15:5:80.
Embodiment 6
Embodiment 6 is substantially the same manner as Example 1, the difference is that: the first active material, the first conductive agent in transition zone
Mass ratio with first binder is 15:65:20.
Embodiment 7
Embodiment 7 is substantially the same manner as Example 1, the difference is that: the second active material, second are led in active material layer
The mass ratio of electric agent and the second binder is 80:10:10.
Embodiment 8
Embodiment 8 is substantially the same manner as Example 1, the difference is that: the second active material, second are led in active material layer
The mass ratio of electric agent and the second binder is 97:1:2.
Embodiment 9
Embodiment 9 is substantially the same manner as Example 1, the difference is that: the second conductive agent is graphene in active material layer,
Its D90 is 5nm, BET 300m2/g。
Embodiment 10
Embodiment 10 is substantially the same manner as Example 1, the difference is that: the second conductive agent is carbon nanometer in active material layer
Pipe, D90 4nm, BET 350m2/g。
Embodiment 11
Embodiment 11 is substantially the same manner as Example 1, the difference is that: the second conductive agent is SP in active material layer,
D90 is 45 μm, BET 48m2/g。
Embodiment 12
Embodiment 12 is substantially the same manner as Example 1, the difference is that: the second conductive agent is carbon nanometer in active material layer
Pipe, graphene and SP, wherein the D90 of graphene is 5nm, BET 300m2/g；The D90 of carbon nanotube is 4nm, and BET is
350m2/g；The D90 of SP is 45 μm, BET 48m2/g。
Comparative example 1
Comparative example 1 is substantially the same manner as Example 1, the difference is that: the not preparation step of transition zone.
Comparative example 2
Comparative example 2 is substantially the same manner as Example 1, the difference is that: that the first active material is not added in transition zone
NCM523。
Comparative example 3
Comparative example 3 is substantially the same manner as Example 1, the difference is that: the first conductive agent is graphene in transition zone,
D90 is 5nm, BET 300m2/g。
Comparative example 4
Comparative example 4 is substantially the same manner as Example 1, the difference is that: the first conductive agent is carbon nanotube in transition zone,
D90 is 4nm, BET 350m2/g。
Performance test
1) pole piece situation is tested
Positive plate after embodiment 1-12 and comparative example 1-4 compacting and the battery after chemical conversion are disassembled, checked just
The state of pole piece.
2) electric performance test
1, high rate performance is tested
At 25 DEG C, charging flow are as follows: with the rate of charge constant-current charge of 1C to 4.20V and then again constant-voltage charge until electricity
Stream is down to 0.05C；Discharge flow path are as follows: with the discharge-rate constant-current discharge of 1C, 3C to 2.8V, the capacity for recording electric discharge is C1, C3,
The discharge-rate performance of 3C is C3/C1；
2, cycle performance is tested
At 25 DEG C, charging flow are as follows: with the rate of charge constant-current charge of 1C to 4.20V and then again constant-voltage charge until electricity
Stream is down to 0.05C；Discharge flow path are as follows: with the discharge-rate constant-current discharge of 1C to 2.8V, above-mentioned charge and discharge process is repeated, until holding
Measuring conservation rate is 80%, records circulating ring number.
Influence of the table 1 whether there is or not transition zone to positive plate state
2 electric performance test of table
As it can be seen from table 1 the positive plate of comparative example 1 does not have transition zone, it is existing that peeling, picking etc. are easy to appear after compacting
As, and positive plate is easy demoulding after chemical conversion.And the positive plate of embodiment 1-12 has transition zone, contains active matter in transition zone
Matter, binder and conductive agent, conductive agent are zero dimension conductive material, after compacting positive plate without peeling, without picking, and without de- after being melted into
Film phenomenon.The positive plate of comparative example 2 has transition zone, and active material is not contained in transition zone, but because conductive containing zero dimension
Material, still without peeling, without picking after positive plate compacting, also without demoulding phenomenon after chemical conversion.The transition zone of comparative example 3 and 4 uses
There is peeling, picking in one-dimensional or two-dimentional conductive material after positive plate compacting, and demoulding phenomenon also occurs after being melted into.With
Upper test result shows that transition zone is arranged between collector and active material layer, and zero dimension conductive material is used in transition zone
As conductive agent, increase the cohesive force between collector and active material so that positive plate after compaction without peeling, picking
Phenomenon, and will not be demoulded after being melted into.
From table 2 it can be seen that embodiment 1-12 effectively improves the forthright again of lithium ion battery compared with comparative example 1-4
Energy and cycle performance.Although comparative example 2 has transition zone, active material is not contained in transition zone, is unfavorable for battery electrical property
The improvement of energy.Though comparative example 3 and 4 has transition zone, the first conductive agent in transition zone is one-dimensional or two-dimentional conductive material,
Cause the cohesive force between active material and collector poor, affects the high rate performance and cycle performance of battery.Embodiment 1-12 is
With transition zone, transition zone contains active material, zero dimension conductive material and binder, has good conductive capability, caking property
Can, the adhesion strength between collector and active material is improved, then be combined with active material layer, battery can be obviously improved
High rate performance and cycle performance.
It can be seen that compared with the existing technology in conjunction with the above detailed description of the present invention, lithium ion battery of the present invention is just
Pole piece and preparation method thereof, lithium ion battery at least have following advantageous effects:
Transition zone is provided in positive plate, and transition zone selects zero dimension conductive material, increases active material layer and afflux
Cohesive force between body improves contact resistance, efficiently solves the problems, such as that caking property is bad between slurry and collector, after compacting
Very complete positive plate can be obtained, and contains active material in transition zone, can be reduced energy density loss when enhancing cohesive force；
Meanwhile active material layer can form good conductive network, reduce the dosage of conductive agent, combining with transition zone can be improved electricity
The high rate performance and cycle performance in pond.
According to above-mentioned principle, the present invention can also be made appropriate changes and modifications to the above embodiments.Therefore, this hair
It is bright to be not limited to specific embodiment disclosed and described above, some modifications and changes of the invention should also be as to fall into this
In the scope of protection of the claims of invention.In addition, although being used some specific terms in this specification, these terms
Merely for convenience of description, it does not limit the present invention in any way.
Claims (12)
1. a kind of based lithium-ion battery positive plate comprising collector is arranged transition zone on a current collector and is arranged in transition zone
On active material layer, which is characterized in that the transition zone include the first active material, the first conductive agent and first binder,
Wherein, the first conductive agent is zero dimension conductive material.
2. based lithium-ion battery positive plate according to claim 1, which is characterized in that the transition zone includes 15-75wt%
First active material, the first conductive agent of 5-65wt% and 20-80wt% first binder.
3. based lithium-ion battery positive plate according to claim 1, which is characterized in that the active material layer includes 80-
The second binder of the second active material of 97wt%, the second conductive agent of 1-10wt% and 2-10wt%.
4. based lithium-ion battery positive plate according to claim 3, which is characterized in that first active material and second is lived
Property substance is independently selected from ferric phosphate lithium salts, LiNixCoyMzO2At least one of, wherein M be selected from Mn, Al, Zr, Ti, V, Mg,
Fe, Mo, x >=0, y >=0, z >=0, and x+y+z=1.
5. based lithium-ion battery positive plate according to claim 3, which is characterized in that second conductive agent is that zero dimension is conductive
At least one of material, one-dimensional electric material and two-dimentional conductive material.
6. based lithium-ion battery positive plate according to claim 5, which is characterized in that the one-dimensional electric material is selected from nanometer
Carbon fiber, carbon nanotube, the length of one-dimensional electric material are 3-10nm, average diameter 3-10nm, specific surface area 200-
500m2/g。
7. based lithium-ion battery positive plate according to claim 5, which is characterized in that the two dimension conductive material is graphite
Alkene, the partial size of two-dimentional conductive material are 5-10nm, specific surface area 200-400m2/ g, conductivity 2000-6000s/m.
8. based lithium-ion battery positive plate according to claim 1, which is characterized in that the zero dimension conductive material is selected from conduction
One of carbon black, SUPER P-Li, electrically conductive graphite, Ketjen black, acetylene black are several, the partial size of the zero dimension conductive material
It is 15-65 μm, specific surface area 35-100m2/g。
9. based lithium-ion battery positive plate according to claim 1, which is characterized in that the transition zone with a thickness of 2-10 μ
m。
10. a kind of preparation method of the described in any item based lithium-ion battery positive plates of claim 1 to 9, which is characterized in that including
Following steps:
1) active material, zero dimension conductive material and binder are dissolved in proportion in solvent and are configured to slurry, on a current collector
It is coated, forms transition zone after dry；And
2) by active material, binder, and contain in zero dimension conductive material, one-dimensional electric material and two-dimentional conductive material at least
A kind of conductive agent dispersion forms electrocondution slurry in a solvent, and electrocondution slurry is coated on transition zone after mixing evenly, does
Based lithium-ion battery positive plate is obtained after dry.
11. preparation method according to claim 10, which is characterized in that in step 2), the solid content of the electrocondution slurry
For 5-25wt%.
12. a kind of lithium ion battery comprising positive plate, negative electrode tab, the diaphragm being interval between positive plate and negative electrode tab, and
Electrolyte, which is characterized in that the positive plate is the described in any item based lithium-ion battery positive plates of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710430473.9A CN109037592A (en) | 2017-06-09 | 2017-06-09 | Lithium ion battery positive plate, preparation method thereof and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710430473.9A CN109037592A (en) | 2017-06-09 | 2017-06-09 | Lithium ion battery positive plate, preparation method thereof and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109037592A true CN109037592A (en) | 2018-12-18 |
Family
ID=64628639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710430473.9A Pending CN109037592A (en) | 2017-06-09 | 2017-06-09 | Lithium ion battery positive plate, preparation method thereof and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109037592A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492058A (en) * | 2019-08-12 | 2019-11-22 | 珠海格力电器股份有限公司 | Electrode slice and preparation method thereof and battery |
| WO2020098778A1 (en) * | 2018-11-16 | 2020-05-22 | 宁德时代新能源科技股份有限公司 | Battery |
| CN112186128A (en) * | 2019-07-01 | 2021-01-05 | 宁德时代新能源科技股份有限公司 | Positive pole piece and electrochemical device |
| CN112436103A (en) * | 2020-12-11 | 2021-03-02 | 湖北亿纬动力有限公司 | Double-layer structure pole piece and preparation method and application thereof |
| CN112490408A (en) * | 2020-12-03 | 2021-03-12 | 珠海冠宇电池股份有限公司 | Positive plate and lithium ion battery comprising same |
| CN112582580A (en) * | 2020-12-14 | 2021-03-30 | 珠海冠宇电池股份有限公司 | Positive plate and lithium ion battery comprising same |
| CN113078293A (en) * | 2021-03-24 | 2021-07-06 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN113113610A (en) * | 2021-03-10 | 2021-07-13 | 欣旺达电动汽车电池有限公司 | Positive pole piece, preparation method thereof and lithium ion battery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008258055A (en) * | 2007-04-06 | 2008-10-23 | Toyota Motor Corp | Secondary battery and vehicle |
| CN102792491A (en) * | 2010-09-30 | 2012-11-21 | 株式会社Lg化学 | Cathode for lithium secondary battery and lithium secondary battery including same |
| CN103208611A (en) * | 2013-03-12 | 2013-07-17 | 深圳市海太阳实业有限公司 | Gradient cathode piece and lithium ion battery preparation method with same |
| WO2016148383A1 (en) * | 2015-03-17 | 2016-09-22 | 주식회사 엘지화학 | Electrode with multilayer structure and lithium secondary battery having same |
| CN106450328A (en) * | 2016-10-14 | 2017-02-22 | 深圳市沃特玛电池有限公司 | LiFePO4 power battery and preparation method thereof |
-
2017
- 2017-06-09 CN CN201710430473.9A patent/CN109037592A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008258055A (en) * | 2007-04-06 | 2008-10-23 | Toyota Motor Corp | Secondary battery and vehicle |
| CN102792491A (en) * | 2010-09-30 | 2012-11-21 | 株式会社Lg化学 | Cathode for lithium secondary battery and lithium secondary battery including same |
| CN103208611A (en) * | 2013-03-12 | 2013-07-17 | 深圳市海太阳实业有限公司 | Gradient cathode piece and lithium ion battery preparation method with same |
| WO2016148383A1 (en) * | 2015-03-17 | 2016-09-22 | 주식회사 엘지화학 | Electrode with multilayer structure and lithium secondary battery having same |
| CN106450328A (en) * | 2016-10-14 | 2017-02-22 | 深圳市沃特玛电池有限公司 | LiFePO4 power battery and preparation method thereof |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020098778A1 (en) * | 2018-11-16 | 2020-05-22 | 宁德时代新能源科技股份有限公司 | Battery |
| US11264610B2 (en) | 2018-11-16 | 2022-03-01 | Contemporary Amperex Technology Co., Limited | Battery comprising a polymer material mixed of a fluorinated polyolefin and/or chlorinated polyolefin polymer material with a difficulty soluble polymer material |
| CN112186128A (en) * | 2019-07-01 | 2021-01-05 | 宁德时代新能源科技股份有限公司 | Positive pole piece and electrochemical device |
| WO2021000547A1 (en) * | 2019-07-01 | 2021-01-07 | 宁德时代新能源科技股份有限公司 | Positive pole piece, electrochemical device and device |
| CN112186128B (en) * | 2019-07-01 | 2021-10-01 | 宁德时代新能源科技股份有限公司 | Positive pole piece and electrochemical device |
| EP3930053A4 (en) * | 2019-07-01 | 2022-04-20 | Contemporary Amperex Technology Co., Limited | Positive pole piece, electrochemical device and device |
| CN110492058A (en) * | 2019-08-12 | 2019-11-22 | 珠海格力电器股份有限公司 | Electrode slice and preparation method thereof and battery |
| CN112490408A (en) * | 2020-12-03 | 2021-03-12 | 珠海冠宇电池股份有限公司 | Positive plate and lithium ion battery comprising same |
| CN112436103A (en) * | 2020-12-11 | 2021-03-02 | 湖北亿纬动力有限公司 | Double-layer structure pole piece and preparation method and application thereof |
| CN112582580A (en) * | 2020-12-14 | 2021-03-30 | 珠海冠宇电池股份有限公司 | Positive plate and lithium ion battery comprising same |
| CN113113610A (en) * | 2021-03-10 | 2021-07-13 | 欣旺达电动汽车电池有限公司 | Positive pole piece, preparation method thereof and lithium ion battery |
| CN113078293A (en) * | 2021-03-24 | 2021-07-06 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110660965B (en) | Negative plate and preparation method thereof, lithium ion battery and preparation method and application thereof | |
| CN109037592A (en) | Lithium ion battery positive plate, preparation method thereof and lithium ion battery | |
| CN101510625B (en) | Ultra-high magnification lithium ion battery | |
| CN102956895B (en) | Positive electrode that surface recombination is coated and preparation method thereof and lithium ion battery | |
| CN107768743A (en) | A kind of lithium ion battery mends lithium method | |
| CN107742709A (en) | A kind of lithium iron phosphate battery anode active material and its preparation and application | |
| CN106450102A (en) | Modified graphite separator for lithium-sulfur battery, preparation method of modified graphite separator and lithium-sulfur battery | |
| CN108493442A (en) | A kind of ternary lithium ion battery | |
| CN109817953A (en) | Prelithiation silicon-carbon cathode material and preparation method thereof and lithium ion battery | |
| CN111653732A (en) | Positive electrode material, positive electrode plate and lithium ion battery | |
| CN105655559A (en) | Lithium ion battery and preparation method thereof | |
| CN105914378B (en) | A kind of lithium ion battery negative electrode and preparation method thereof, lithium ion battery | |
| CN105470559B (en) | A kind of lithium ion battery of high-energy density | |
| CN109428051A (en) | Lithium ion battery and positive plate thereof | |
| CN106356536A (en) | Lithium ion battery negative electrode and preparation method thereof | |
| CN108321438A (en) | Full graphite lithium-sulfur cell and preparation method thereof | |
| CN105591105A (en) | Preparation method for coating surfaces of electrodes with solid electrolyte complex liquid | |
| CN109698334A (en) | Positive plate, lithium titanate battery and preparation method thereof | |
| CN110112366A (en) | A kind of electrodes of lithium-ion batteries and lithium ion battery | |
| CN105914394A (en) | Composite cathode material of low-temperature lithium ion battery, cathode plate of low-temperature lithium ion battery, preparation method thereof, and lithium ion battery | |
| CN106711428A (en) | Lithium-rich ternary composite material and preparation method thereof | |
| CN108878893A (en) | A kind of fast charge negative electrode of lithium ion battery modified collector and preparation method thereof | |
| Feng et al. | Energy-saving synthesis of functional CoS2/rGO interlayer with enhanced conversion kinetics for high-performance lithium-sulfur batteries | |
| CN104600267B (en) | Graphene/titanium oxide composite manufacturing technique and its application process | |
| CN116154100A (en) | Lithium supplementing positive electrode, preparation method thereof and lithium ion secondary battery |
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: 20181218 |