CN109659492A - A kind of anode plate for lithium ionic cell and preparation method thereof and lithium ion battery - Google Patents
A kind of anode plate for lithium ionic cell and preparation method thereof and lithium ion battery Download PDFInfo
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- CN109659492A CN109659492A CN201711393629.7A CN201711393629A CN109659492A CN 109659492 A CN109659492 A CN 109659492A CN 201711393629 A CN201711393629 A CN 201711393629A CN 109659492 A CN109659492 A CN 109659492A
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- anode plate
- negative electrode
- ionic cell
- carbomer
- lithium ionic
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- 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
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- 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
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- 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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of anode plate for lithium ionic cell and preparation method thereof and lithium ion battery, the anode plate for lithium ionic cell includes collector and the negative electrode of lithium ion battery composition coated in the collection liquid surface；The cathode composition includes negative electrode active material, conductive agent and binder；The binder includes first binder, and the first binder is acrylate copolymer.The negative electrode slurry that anode plate for lithium ionic cell of the invention uses is using the mixture of acrylate copolymer or acrylate copolymer and other binders as binder, the negative electrode slurry made be able to maintain for a long time it is not stratified, without precipitating and stable viscosity, substantially increase the stability of negative electrode slurry, the anode plate for lithium ionic cell being prepared using the negative electrode slurry, more traditional negative electrode tab has higher compacted density, and the cycle life of the lithium ion battery formed using the negative electrode tab is longer, and has excellent discharge capacity and cycle performance.
Description
Technical field
The present invention relates to technical field of lithium ion, in particular to a kind of anode plate for lithium ionic cell and its system
Preparation Method and lithium ion battery.
Background technique
Lithium ion battery due to specific energy is big, operating voltage is high, service life cycle is long, memory-less effect, self discharge are small,
Pollution free green environment protection, the advantages that having extended cycle life, have been widely used in Portable mobile electronic device such as mobile phone, have taken the photograph
Camera, laptop etc. are also listed in the candidate power supply of electric car, space flight, military affairs and large-scale energy storage device.With lithium from
The development of sub- battery, requires the capacity, high and low temperature resistance and cycle life etc. of battery higher and higher, and cell size is in electricity
It is played a crucial role in the manufacturing process of pond.The stability of slurry directly affects the quality of slurry coating, and then influences electricity
The performances such as the cycle life in pond.
The negative electrode slurry that conventional lithium ion battery cathode uses using SBR butadiene-styrene rubber and CMC carboxymethyl cellulose as
The stability of binder, slurry is poor, precipitates after shelving 12 hours, the bad phenomenons such as viscosity decline of slurry, unfavorable
The negative electrode tab of high quality is stored and is used to prepare in slurry.
Summary of the invention
In view of this, the preparation method and lithium ion battery of a kind of anode plate for lithium ionic cell provided by the invention, more preferably
Overcome the above-mentioned problems of the prior art and defect, the negative electrode slurry that anode plate for lithium ionic cell of the invention uses is adopted
Use the mixture of acrylate copolymer or acrylate copolymer and other binders as binder, the negative electrode slurry enable
It is enough to keep not stratified for a long time, without precipitating and stable viscosity, the stability of negative electrode slurry is substantially increased, is starched using the cathode
Expect the anode plate for lithium ionic cell being prepared, more traditional negative electrode tab has higher compacted density, and uses the negative electrode tab
The cycle life of the lithium ion battery of composition is longer, and has excellent discharge capacity and cycle performance.
A kind of anode plate for lithium ionic cell, the anode plate for lithium ionic cell include collector and be coated in the collector
The negative electrode of lithium ion battery composition on surface；The cathode composition includes negative electrode active material, conductive agent and binder；It is described
Binder includes first binder, and the first binder is acrylate copolymer.
Further, the negative electrode active material, conductive agent, binder quality account for the total of the cathode composition respectively
72~98%, 0.5~3% and the 1.5~25% of quality.
Further, the binder further includes the second binder, and second binder is butadiene-styrene rubber, carboxymethyl fibre
Tie up element, Kynoar, polytetrafluoroethylene (PTFE), hydroxypropyl methyl cellulose, polyvinyl alcohol, polyacrylamide, perfluoro propyl perfluor
One of the copolymer of vinyl ethers and polytetrafluoroethylene (PTFE), acrylonitrile multiple copolymer, sodium alginate and chitosan derivatives
Or it is a variety of.
Further, the acrylate copolymer is carbomer 934, Acritamer 940, Carbopol 941, Carbopol, card
Wave nurse 981, carbomer934, carbomer 1382, carbomer TR-1, carbomer TR-2, carbomer ETD2001, carbomer
ETD2020, carbomer ETD2050, carbomer ultrez10, carbomer ultrez20, carbomer ultrez21, carbomer Aqua
One of CC, carbomer AquaSF-1, carbomer L10, carbomer EC-2 and carbomer EZ-4U or a variety of.
Further, the conductive agent is one in conductive black, electrically conductive graphite, carbon fiber, carbon nanotube and graphene
Kind is a variety of.
Further, the negative electrode active material is natural graphite, artificial graphite, lithium titanate, silicon-carbon, graphene, tin oxygen
In compound, Sn-polymetallic orefield, kamash alloy, silicon-base alloy, germanium-base alloy, acieral, antimony-containing alloy and magnesium base alloy
It is one or more.
The present invention also provides a kind of preparation method of anode plate for lithium ionic cell, the anode plate for lithium ionic cell is upper
The anode plate for lithium ionic cell stated, the preparation method include:
Negative electrode active material, conductive agent, binder and solvent are uniformly mixed, negative electrode slurry is obtained；
The negative electrode slurry is coated in collection liquid surface, drying.
Further, the collector is copper foil or copper alloy foil.
A kind of lithium ion battery, the lithium ion battery include above-mentioned anode plate for lithium ionic cell.
Compared with prior art, a kind of preparation method of anode plate for lithium ionic cell and having for lithium ion battery of the invention
Beneficial effect is:
(1) negative electrode slurry that anode plate for lithium ionic cell of the invention uses uses acrylate copolymer or acroleic acid polymerization
The mixture of object and other binders as binder, the negative electrode slurry made be able to maintain for a long time it is not stratified, without precipitating
With stable viscosity, the stability of negative electrode slurry is substantially increased, the lithium ion battery being prepared using the negative electrode slurry is negative
Pole piece, more traditional negative electrode tab have higher compacted density, and the circulation longevity of the lithium ion battery formed using the negative electrode tab
Order it is longer, and have excellent discharge capacity and cycle performance.
(2) preparation method of anode plate for lithium ionic cell of the invention is simple, and cost is relatively low, is suitble to large-scale industry raw
It produces, and high production efficiency.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, makees detailed
It is described as follows.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the charging and discharging curve figure of the lithium ion battery of the embodiment of the present invention 1；
Fig. 2 is the charging and discharging curve figure of the lithium ion battery of comparative example 1.
Specific embodiment
To facilitate the understanding of the present invention, it elaborates below with reference to the mode of embodiment to technical solution of the present invention,
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention.
But the invention can be embodied in many other ways as described herein, those skilled in the art can be with
Similar improvement is done without violating the connotation of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.
Unless otherwise defined, all technologies used herein and scientific term have and the common skill of fields of the present invention
The normally understood identical meaning of art personnel.When there is a conflict, the definition in this specification shall prevail.
Term as used herein:
" by ... preparation " it is synonymous with "comprising".Term "comprising" used herein, " comprising ", " having ", " containing "
Or its any other deformation, it is intended that cover non-exclusionism includes.For example, composition, step, method comprising listed elements,
Product or device are not necessarily limited to those elements, but may include not expressly listed other elements or such composition, step
Suddenly, method, product or the intrinsic element of device.
Conjunction " by ... form " exclude any element that do not point out, step or component.If in claim,
This phrase will make claim closed, so that it is not included the material in addition to the material of those descriptions, but relative
Except customary impurities.When phrase " by ... form " be rather than immediately following theme in the clause that appears in claim main body after
When, only it is limited to element described in the clause；Other elements be not excluded the claim as a whole it
Outside.
Equivalent, concentration or other values or parameter are excellent with range, preferred scope or a series of upper limit preferred values and lower limit
When the Range Representation that choosing value limits, this should be understood as specifically disclosing by any range limit or preferred value and any range
Any pairing of lower limit or preferred value is formed by all ranges, regardless of whether the range separately discloses.For example, when open
When range " 1~5 ", described range should be interpreted as including range " 1~4 ", " 1~3 ", " 1~2 ", " 1~2 and 4~
5 ", " 1~3 and 5 " etc..When numberical range is described herein, unless otherwise stated, otherwise the range is intended to include its end
Value and all integers and score in the range.
"and/or" is used to indicate that one of illustrated situation or both may to occur, for example, A and/or B includes (A
And B) and (A or B).
The present invention provides a kind of anode plate for lithium ionic cell, the anode plate for lithium ionic cell includes collector and coating
In the negative electrode of lithium ion battery composition of the collection liquid surface；The cathode composition includes negative electrode active material, conductive agent
And binder；The binder includes first binder, and the first binder is acrylate copolymer.
Preferably, the negative electrode active material, conductive agent, binder quality account for total matter of the cathode composition respectively
72~98%, 0.5~3% and the 1.5~25% of amount are the cathode in terms of 100% by the gross mass of the cathode composition
The content of active material is 72~98% such as 72%, 75%, 80%, 85%, 90%, 95% or 98%；The conductive agent
Content is 0.5~3% such as 0.5%, 1%, 1.5%, 2%, 2.5% or 3%；The content of the binder is 1.5~25%
Such as 1.5%, 5%, 8%, 10%, 12%, 15%, 18%, 20%, 22% or 25%.
Preferably, the binder further includes the second binder, and second binder is butadiene-styrene rubber (SBR), carboxylic first
Base cellulose (CMC), Kynoar (PVDF), polytetrafluoroethylene (PTFE) (PTFE), hydroxypropyl methyl cellulose (HPMC), polyethylene
The copolymer (PFA) of alcohol (PVA), polyacrylamide (PAM) perfluoro propyl perfluoroalkyl vinyl ether and polytetrafluoroethylene (PTFE), acrylonitrile are more
One of membered copolymer, sodium alginate and chitosan derivatives etc. are a variety of.
Above-mentioned acrylonitrile multiple copolymer can be enumerated as one of LA132, LA133 and LA135 or a variety of.
Preferably, the acrylate copolymer is carbomer 934, Acritamer 940, Carbopol 941, Carbopol, card wave
Nurse 981, carbomer934, carbomer 1382, carbomer TR-1, carbomer TR-2, carbomer ETD2001, carbomer
ETD2020, carbomer ETD2050, carbomer ultrez10, carbomer ultrez20, carbomer ultrez21, carbomer Aqua
One of CC, carbomer Aqua SF-1, carbomer L10, carbomer EC-2 and carbomer EZ-4U or a variety of.
Preferably, the conductive agent is conductive black, electrically conductive graphite, carbon fiber, carbon nanotube and graphene.Wherein, it leads
Electric carbon black can be enumerated as Super P or acetylene black etc.；Electrically conductive graphite can be enumerated as graphite KS6 etc..
Preferably, the active material is natural graphite, artificial graphite, lithium titanate, silicon-carbon, graphene, tin-oxide, tin
One of base composite oxidate, kamash alloy, silicon-base alloy, germanium-base alloy, acieral, antimony-containing alloy and magnesium base alloy or
It is a variety of.
Anode plate for lithium ionic cell of the invention is using acrylate copolymer or acrylate copolymer and other binders
Mixture as binder, the anode plate for lithium ionic cell made be able to maintain for a long time it is not stratified, without precipitating and it is stable
Viscosity substantially increases the stability of anode plate for lithium ionic cell.
The present invention also provides a kind of preparation method of anode plate for lithium ionic cell, the anode plate for lithium ionic cell is upper
The anode plate for lithium ionic cell stated, the preparation method include:
Negative electrode active material, conductive agent, binder and solvent are uniformly mixed, negative electrode slurry is obtained；
The negative electrode slurry is coated in collection liquid surface, drying.
Preferably, the preparation method of the negative electrode slurry includes: and is first stirred negative electrode active material and conductive agent, then
Solvent and binder is added, is uniformly mixed.
Preferably, the stirring rate be 1200~1800r/min such as 1200r/min, 1300r/min, 1400r/min,
1500r/min, 1600r/min, 1700r/min or 1800r/min etc..
The mixed preparing of above-mentioned slurry can be enumerated as being stirred to obtain using common blender, can also be enumerated as using
Ultrasonic stirrer is stirred by ultrasonic to obtain.
Preferably, the collector is copper foil or copper alloy foil.
The solvent is water or is one or more of water and N-Methyl pyrrolidone (NMP), ethyl alcohol and isopropanol
Mixture.Wherein, the anode plate for lithium ionic cell obtained with water especially deionization water as solvent is more environmentally friendly, and cost is lower.
The preparation method of anode plate for lithium ionic cell of the invention is simple, and cost is relatively low, is suitble to large-scale industrial production, and
High production efficiency.
The present invention also provides a kind of lithium ion battery, the lithium ion battery includes above-mentioned negative electrode of lithium ion battery
Piece.
The cycle life of lithium ion battery provided by the invention is longer, and has excellent discharge capacity and cycle performance.
To facilitate the understanding of the present invention, below with reference to embodiment to further illustrate the technical scheme of the present invention.Applicant
Statement, the present invention illustrate detailed process equipment and process flow of the invention by following embodiments, but the present invention not office
It is limited to above-mentioned detailed process equipment and process flow, that is, does not mean that the present invention should rely on following detailed process equipments and technique stream
Cheng Caineng is implemented.It should be clear to those skilled in the art, any improvement in the present invention, to each original of product of the present invention
The equivalence replacement of material and addition, the selection of concrete mode of auxiliary element etc. all fall within protection scope of the present invention and open model
Within enclosing.
Embodiment 1
The preparation of anode plate for lithium ionic cell
(1) after taking 96.5kg artificial graphite and 1.5kg Super P to be added in agitator tank, with the stirring of 1200r/min
Rate stirs dry-mixed 30min；Add 150kg water, 1kg carbomer ultrez20 and 1kg acrylonitrile multiple copolymer LA132 is arrived
It is above-mentioned it is dry-mixed after mixture in, 2h is stirred with the stirring rate of 1200r/min, obtains negative electrode slurry.
(2) it takes the above-mentioned negative electrode slurry being prepared to be coated uniformly on copper foil surface, then is toasted at 80 DEG C, after drying again
It roll-in and cuts, obtains anode plate for lithium ionic cell.
The preparation of lithium ion battery
70kg nickle cobalt lithium manganate, 28kg LiMn2O4,0.4kg Super P, 0.8kg carbon nanotube and 0.8kg is taken to gather inclined fluorine
Ethylene is added in 100kg N-Methyl pyrrolidone, is dispersed with stirring and is uniformly obtained anode sizing agent.The anode sizing agent is uniformly applied
Aluminium foil surface is overlayed on, is toasted at 80 DEG C, roll-in and is cut again after drying, obtains based lithium-ion battery positive plate.
Battery core is made in above-mentioned negative electrode tab, positive plate and diaphragm in a winding manner, then battery core is placed in battery steel shell,
Lithium ion battery is made.
Embodiment 2
The preparation of anode plate for lithium ionic cell
(1) it after taking 96.5kg silicon-carbon and 1kg Super P to be added in agitator tank, is stirred with the stirring rate of 1300r/min
Mix dry-mixed 1h；Add 42.9kg water, 1kg carbomer ultrez20 and 1.5kg carbomer EC-2 to it is above-mentioned it is dry-mixed after mixing
In object, 2h is stirred with the stirring rate of 1300r/min, obtains negative electrode slurry.
(2) it takes the above-mentioned negative electrode slurry being prepared to be coated uniformly on copper foil surface, then is toasted at 90 DEG C, after drying again
It roll-in and cuts, obtains anode plate for lithium ionic cell.
The preparation of lithium ion battery
The preparation of based lithium-ion battery positive plate is the same as embodiment 1；Then by anode plate for lithium ionic cell, positive plate and diaphragm with
Battery core is made in the mode of winding, then battery core is placed in battery steel shell, and lithium ion battery is made.
Embodiment 3
The preparation of anode plate for lithium ionic cell
(1) after taking 96.5kg natural graphite and 1kg Super P to be added in agitator tank, with the stirring speed of 1500r/min
Rate stirs dry-mixed 45min；100kg water, 0.5kg carbomer TR-1,1kg butadiene-styrene rubber and 1kg carboxymethyl cellulose is added to arrive
It is above-mentioned it is dry-mixed after mixture in, 2.5h is stirred with the stirring rate of 1500r/min, obtains negative electrode slurry.
(2) it takes the above-mentioned negative electrode slurry being prepared to be coated uniformly on copper foil surface, then is toasted at 100 DEG C, after drying
It roll-in and cuts again, obtains anode plate for lithium ionic cell.
The preparation of lithium ion battery
The preparation of based lithium-ion battery positive plate is the same as embodiment 1；Then by anode plate for lithium ionic cell, positive plate and diaphragm with
Battery core is made in the mode of winding, then battery core is placed in battery steel shell, and lithium ion battery is made.
Embodiment 4
The preparation of anode plate for lithium ionic cell
(1) after taking 96.5kg natural graphite and 1kg Super P to be added in agitator tank, with the stirring speed of 1600r/min
Rate stirs dry-mixed 45min；It is polynary total to add 66.7kg water, 0.3kg Carbopol 941,1kg butadiene-styrene rubber and 1.2kg acrylonitrile
Polymers LA132 to it is above-mentioned it is dry-mixed after mixture in, 2.5h is stirred with the stirring rate of 1600r/min, obtains negative electrode slurry.
(2) it takes the above-mentioned negative electrode slurry being prepared to be coated uniformly on copper foil surface, then is toasted at 110 DEG C, after drying
It roll-in and cuts again, obtains anode plate for lithium ionic cell.
The preparation of lithium ion battery
The preparation of based lithium-ion battery positive plate is the same as embodiment 1；Then by anode plate for lithium ionic cell, positive plate and diaphragm with
Battery core is made in the mode of winding, then battery core is placed in battery steel shell, and lithium ion battery is made.
Embodiment 5
The preparation of anode plate for lithium ionic cell
(1) after taking 96.5kg artificial graphite and 1kg Super P to be added in agitator tank, with the stirring speed of 1800r/min
Rate stirs dry-mixed 45min；Add 100kg water, 0.3kg Carbopol 941,1kg butadiene-styrene rubber and 1.2kg acrylonitrile multi-component copolymer
Object LA132 to it is above-mentioned it is dry-mixed after mixture in, 2.5h is stirred with the stirring rate of 1800r/min, obtains negative electrode slurry.
(2) it takes the above-mentioned negative electrode slurry being prepared to be coated uniformly on copper foil surface, then is toasted at 120 DEG C, after drying
It roll-in and cuts again, obtains anode plate for lithium ionic cell.
The preparation of lithium ion battery
The preparation of based lithium-ion battery positive plate is the same as embodiment 1；Then by anode plate for lithium ionic cell, positive plate and diaphragm with
Battery core is made in the mode of winding, then battery core is placed in battery steel shell, and lithium ion battery is made.
Comparative example 1
The preparation of anode plate for lithium ionic cell
(1) after taking 96.5kg natural graphite and 0.7kg Super P to be added in agitator tank, with the stirring of 1500r/min
Rate stirs dry-mixed 45min；Add 100kg water, 1.5kg butadiene-styrene rubber and 1.3kg carboxymethyl cellulose to it is above-mentioned it is dry-mixed after
Mixture in, 2.5h is stirred with the stirring rate of 1500r/min, obtains negative electrode slurry.
(2) it takes the above-mentioned negative electrode slurry being prepared to be coated uniformly on copper foil surface, then is toasted at 100 DEG C, after drying
It roll-in and cuts again, obtains anode plate for lithium ionic cell.
The preparation of lithium ion battery
The preparation of based lithium-ion battery positive plate is the same as embodiment 1；Then by anode plate for lithium ionic cell, positive plate and diaphragm with
Battery core is made in the mode of winding, then battery core is placed in battery steel shell, and lithium ion battery is made.
The anode plate for lithium ionic cell prepared to above-described embodiment 1~5 and comparative example 1 is identical to roller speed and pressure
Under power, its compacted density is tested, as a result as shown in table 1 below.
Table 1
| Sample | Roll-in tonnage | Compacted density (g/mm3) |
| Embodiment 1 | 60 | 1.75 |
| Embodiment 2 | 60 | 1.76 |
| Embodiment 3 | 60 | 1.77 |
| Embodiment 4 | 60 | 1.75 |
| Embodiment 5 | 60 | 1.74 |
| Comparative example 1 | 60 | 1.60 |
It can be obtained by above-mentioned table 1, the compacted density of anode plate for lithium ionic cell prepared by the embodiment of the present invention 1~5 is more right
The compacted density of anode plate for lithium ionic cell prepared by ratio 12 is higher.
Charge-discharge test and cycle life, test-strips are carried out to the lithium ion battery of above-described embodiment 1~5 and comparative example 1
Part is as follows:
Constant-current constant-voltage charging: blanking voltage 4.2V, charging current 2600mA, cut-off current 100mA；
Environment temperature: 25 DEG C；
Constant-current discharge: blanking voltage 3.0V, discharge current 2600mA, 25 DEG C of environment temperature.
The lithium ion battery charging and discharging curve figure of the embodiment of the present invention 1 and comparative example 1 is as depicted in figs. 1 and 2, needs to illustrate
, the lithium ion battery charging and discharging curve figure result of the embodiment of the present invention 2~5 is substantially the same as embodiment 1.
The lithium ion battery of the embodiment of the present invention 1~5 and comparative example 1 carries out specific test result is as follows the table of charge-discharge test
Shown in 1.
Table 2
It can be obtained by above-mentioned table 2, the charge and discharge capacity of lithium ion battery prepared by the embodiment of the present invention 1~5 is compared with comparative example
The charge and discharge capacity of the anode plate for lithium ionic cell of 1 preparation is higher；Lithium ion battery prepared by the embodiment of the present invention 1~5 follows
The ring service life is longer compared with the cycle life of anode plate for lithium ionic cell prepared by comparative example 1.
In conclusion the negative electrode slurry that anode plate for lithium ionic cell of the invention uses is using acrylate copolymer or propylene
The mixture of acid polymer and other binders as binder, the negative electrode slurry made be able to maintain for a long time it is not stratified,
Without precipitating and stable viscosity, the stability of negative electrode slurry is substantially increased, the lithium ion being prepared using the negative electrode slurry
Battery cathode sheet, more traditional negative electrode tab have higher compacted density, and the lithium ion battery formed using the negative electrode tab
Cycle life is longer, and has excellent discharge capacity.
The above is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, inventive formulation and preparation process can have various modifications and variations.All within the spirits and principles of the present invention, institute
Any modification, equivalent substitution, improvement and etc. of work, should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of anode plate for lithium ionic cell, it is characterised in that: the anode plate for lithium ionic cell includes collector and is coated in
The negative electrode of lithium ion battery composition of the collection liquid surface；The cathode composition include negative electrode active material, conductive agent and
Binder；The binder includes first binder, and the first binder is acrylate copolymer.
2. anode plate for lithium ionic cell according to claim 1, it is characterised in that: the negative electrode active material, conductive agent,
The quality of binder accounts for 72~98%, 0.5~3% and the 1.5~25% of the gross mass of the cathode composition respectively.
3. anode plate for lithium ionic cell according to claim 1, it is characterised in that: the binder further includes the second bonding
Agent, second binder are butadiene-styrene rubber, carboxymethyl cellulose, Kynoar, polytetrafluoroethylene (PTFE), hydroxypropyl methyl fiber
Element, polyvinyl alcohol, polyacrylamide, perfluoro propyl perfluoroalkyl vinyl ether and the copolymer of polytetrafluoroethylene (PTFE), acrylonitrile are polynary total
One of polymers, sodium alginate and chitosan derivatives are a variety of.
4. anode plate for lithium ionic cell according to claim 1, it is characterised in that: the acrylate copolymer is carbomer
934, Acritamer 940, Carbopol 941, Carbopol, Carbomer981, carbomer934, carbomer 1382, carbomer TR-1,
Carbomer TR-2, carbomer ETD2001, carbomer ETD2020, carbomer ETD2050, carbomer ultrez10, carbomer
Ultrez20, carbomer ultrez21, carbomer Aqua CC, carbomer Aqua SF-1, carbomer L10, carbomer EC-2 and
One of carbomer EZ-4U or a variety of.
5. anode plate for lithium ionic cell according to claim 1, it is characterised in that: the conductive agent is conductive black, leads
One of electro-graphitic, carbon fiber, carbon nanotube and graphene are a variety of.
6. anode plate for lithium ionic cell according to claim 1, it is characterised in that: the negative electrode active material is natural stone
Ink, artificial graphite, lithium titanate, silicon-carbon, graphene, tin-oxide, Sn-polymetallic orefield, kamash alloy, silicon-base alloy, germanium base
One of alloy, acieral, antimony-containing alloy and magnesium base alloy are a variety of.
7. a kind of preparation method of anode plate for lithium ionic cell, it is characterised in that: the anode plate for lithium ionic cell is wanted for right
Anode plate for lithium ionic cell described in asking any one of 1~6, the preparation method include:
Negative electrode active material, conductive agent, binder and solvent are uniformly mixed, negative electrode slurry is obtained；
The negative electrode slurry is coated in collection liquid surface, drying.
8. the preparation method of anode plate for lithium ionic cell according to claim 7, it is characterised in that: the collector is copper
Foil or copper alloy foil.
9. a kind of lithium ion battery, it is characterised in that: the lithium ion battery includes as described in any one of claim 1~6
Anode plate for lithium ionic cell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711393629.7A CN109659492A (en) | 2017-12-21 | 2017-12-21 | A kind of anode plate for lithium ionic cell and preparation method thereof and lithium ion battery |
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| CN201711393629.7A CN109659492A (en) | 2017-12-21 | 2017-12-21 | A kind of anode plate for lithium ionic cell and preparation method thereof and lithium ion battery |
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| CN201711393629.7A Pending CN109659492A (en) | 2017-12-21 | 2017-12-21 | A kind of anode plate for lithium ionic cell and preparation method thereof and lithium ion battery |
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| CN111816880A (en) * | 2020-08-27 | 2020-10-23 | 苏州清陶新能源科技有限公司 | Lithium ion battery cathode and preparation method thereof |
| CN112563511A (en) * | 2020-12-10 | 2021-03-26 | 深圳中科瑞能实业有限公司 | Aluminum-containing negative electrode material, negative electrode plate and lithium ion secondary battery |
| CN112614976A (en) * | 2020-12-17 | 2021-04-06 | 惠州亿纬锂能股份有限公司 | Silicon negative electrode material of lithium ion battery and preparation method and application thereof |
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| CN111816880A (en) * | 2020-08-27 | 2020-10-23 | 苏州清陶新能源科技有限公司 | Lithium ion battery cathode and preparation method thereof |
| CN112563511A (en) * | 2020-12-10 | 2021-03-26 | 深圳中科瑞能实业有限公司 | Aluminum-containing negative electrode material, negative electrode plate and lithium ion secondary battery |
| CN112614976A (en) * | 2020-12-17 | 2021-04-06 | 惠州亿纬锂能股份有限公司 | Silicon negative electrode material of lithium ion battery and preparation method and application thereof |
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