CN109755473A - A kind of dry-forming method of electrode of lithium cell - Google Patents
A kind of dry-forming method of electrode of lithium cell Download PDFInfo
- Publication number
- CN109755473A CN109755473A CN201811630834.5A CN201811630834A CN109755473A CN 109755473 A CN109755473 A CN 109755473A CN 201811630834 A CN201811630834 A CN 201811630834A CN 109755473 A CN109755473 A CN 109755473A
- Authority
- CN
- China
- Prior art keywords
- electrode
- copolymer
- styrene
- rubber
- dry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of dry-forming methods of electrode of lithium cell, including provide a kind of electrode composite material and dry-forming method.The composite material includes active material, the additive of conductive material, polymeric binder.The composite material forms electrode film band through uniformly mixing and fine crushing, multi-pass high temperature rolling, is then combined on the metallic foil with adhesive coating by high hot rolling, finally obtains coiled electrode.The dry-forming method of electrode of lithium cell of the invention, the problems such as equipment investment caused by usual wet processing is more, energy consumption is high, performance deficiency are prevented, by optimizing manufacturing process, it reduces cost and improves performance, can get has high energy density, the high and low contact resistance of power density and the high-performance energy storage electrode having extended cycle life, suitable for electrode of lithium cell etc., can be widely popularized in fields such as new-energy automobiles, market potential is huge.
Description
Technical field
The present invention relates to a kind of electrode energy storage device more particularly to a kind of electrode of lithium cell and its dry-forming method.
Background technique
Lithium battery (also known as lithium ion battery or LIB) is a kind of rechargeable battery, and lithium ion is in electric discharge from cathode (sun
Pole) it is moved to positive (cathode), when charging, returns.The cyclic carbonate and linear carbonates formed as electrolyte, solvent is
It is used, and lithium hexafluoro phosphate (LiPF6) is added or LiBF4 (LiBF4) has been used as supporting electrolyte.
The electrode of typical lithium ion battery is applied by method in the presence of adhesive by active material coating
It is constituted on metal collector plate, which can be such that active material is bonded together to be bonded in current collector plate with active material
Surface.Adhesive is usually for improving electric conductivity in conjunction with carbon black.Common negative electrode active material is charcoal in lithium ion battery
(graphite) or silicon, and the common used material for being used for anode is lithium metal oxide, mixed-metal oxides.The collector of cathode is usual
It is copper foil, positive collector is usually aluminium foil.The electrolyte can be the organic carbon hydrochlorate containing lithium salts mixture and
Organic carbonate.Organic carbonate may include ethylene carbonate, diethyl carbonate or their combination.Lithium salts may include
LiPF6, LiAsF6, LiBF4, LiCIO4, LiCF3SO3, Li (SO2CF3) 2 or combinations thereof.Diaphragm is usually by polyethylene, poly- third
The microporous multi-layer film of the stretching of alkene or combinations thereof is made.
The electrode performance of lithium ion battery depends primarily on bonding contained in active material type and electrode used
Agent type.For example, their cycle life, power, capacity and low-temperature characteristics are all likely to be dependent on the type of adhesive.In ideal
Electrod composition in, adhesive not only provides mechanical bond between active material particle, but also ion is allowed to be electrolysed
It can effectively be migrated to active material in liquid.Therefore, adhesive is dual function, and provides mechanical bond and ion transport.It is logical
It crosses and the amount of adhesive is adjusted, to reach the optimization of electrode performance.
Adhesive including homopolymer and polyvinylidene fluoride copolymer (PVDF) etc., is widely used in the yin of lithium ion battery
The adhesive of pole and anode.Kynoar itself non-conducting lithium ion, and ion is allowed to transport, PVDF with electrolyte absorption
And it expands.Kynoar is lower to the binding force of li-ion electrode active material and collector.In addition, polyelectrolyte is being electrolysed
Swelling in matter solution further destroys the binding force of PVDF and active material.Due to swelling, binding performance is significantly reduced.
Functionalized copolymers provide the material of function admirable, may be used as the adhesive material of lithium ion battery, for example, with collector
Firm adhesiveness, stronger binding force, swelling appropriate, the load of higher active material, excellent flexibility in electrolyte
With operability (redox/thermostabilization).
Currently, the electrode of lithium ion battery generallys use coating or slurry casting process (wet process) is made.It is made of wet process
The problem of electrode, is: (1) consuming mass energy to remove solvent；(2) there is residual solvent in coated electrode, this may be reduced
The service life of battery；(3) adhesive for being coated in surface of active material dissolution will increase battery resistivity, to reduce lithium battery
Energy density and power density；(4) electrode tap density is low, the reason is that collector foil is also easy to produce change when bearing immense pressure
Shape fold, roll squeezer pressure are restricted.Low-density leads to low energy densities, high resistance and low circulation service life.
Summary of the invention
The purpose of the present invention for the defects in the prior art, provides a kind of dry process side of electrode of lithium cell thus
The problems such as method, the energy density which solves current battery is low, high resistance, low service life cycle.
To achieve the above object, the technical scheme is that, a kind of dry-forming method of electrode of lithium cell, feature
It is, preparation method is to pass through the electrode composite material of active material, the additive of conductive material, polymeric binder composition
Uniform mixing, fine crushing, multi-pass high temperature rolling form electrode film band；The electrode film band is answered by high hot rolling
It closes on electrode current collecting body, obtains coiled electrode of lithium cell, the temperature of high temperature rolling is 100-200 DEG C, the electrode
Collector is the metallic foil with adhesive coating, and electrode current collecting body includes anode and cathode, the collector of cathode are copper foils,
The collector of anode is aluminium foil, and the active material, the additive of conductive material, polymeric binder account for total mixture matter respectively
The weight that accounts for of amount is 70-98%, 0-10%, 2-20%.
Further, wherein positive electrode active materials include that at least one is selected from LiCoO2, LiNi1/3Co1/3Mn1/3O2,
LiNi0.8Co0.15Al0.05O2, Li1+xNi1/3Co1/3Mn1/3O2, wherein 0 < x < 0.8, LiMn2O4, LiFePO4,
Li2Mn2O4, LiNiCoAlO2, LiNiyCoxMzO, wherein M=Mn, Al, Sn, In, Ga or Ti and 0.15 < x < 0.5,0.5
< y < 0.8 and 0 < z < 0.15, Li [Li (1-2y)/3NiyMn (2-y)/3] O2, Li [Li (1-y)/3CoyMn (2-2y)/3] O2 and
Li [NiyCo1-2yMny] O2, wherein 0 < y < 0.5, LiNiCoO2.MnO2, are rich in lithium compound Li1+y (Ni1/3Co1/3Mn1/
3) 1-yO2, wherein y=x/ (2+x) and x=0-0.33, and xLi2MnO3 (1-x) Li (NiCoMn) O2 and Li (1+y)
(Ni0.5Co0.2Mn0.3) 1-yO2, wherein y=x/ (2+x) and x=0-0.33, and LiMPO4, wherein M be V, Cr, Mn,
One of Fe, Co, and Ni or a variety of.The negative electrode active material be carbon, hard carbon, soft carbon, artificial graphite, natural graphite, in
Between one of phase carbosphere, SnO2, TiO2, lithium titanate, NiAl2O4, SiO2, silicon or a variety of.
Further, the additive of the conductive material is carbon black, acetylene carbon black, carbon nanotube, carbon nano-fiber, carbon fiber
One of dimension, coke, high surface area carbon, graphite, metallic particles and conducting polymer are a variety of.
Further, the polymer adhesive is a kind of not fluoro-containing copolymer adhesive.
Further, the polymer adhesive is a kind of flexible polymer, be acrylic or methacrylic acid derivative,
Butyl acrylate, butyl methacrylate, poly hydroxy ethyl acrylate, polyacrylamide, polypropylene homopolymer or copolymer,
N butyl acrylate styrene acrylonitrile copolymer, butyl acrylate, butyl acrylate acrylonitrile glycidol acrylic acid
Methyl terpolymer, polyisobutene, butyl rubber, isobutylene-styrene copolymer, polybutadiene, poly- isoamyl two
Alkene, butadiene-styrene block copolymer, styrene-isoprene block copolymer, acrylonitrile-butadiene copolymer, propylene
Nitrile-butadiene-styrene copolymer, butadiene-styrene block copolymer, s-B-S block copolymerization
Object, styrene-isoprene block copolymer, styrene-isoprene-styrene block copolymer, methyl-silicone oil, diphenyl
Polysiloxanes, polysiloxanediol, liquid polyethylene, polypropylene, poly 1-butene, ethene-alpha-olefin copolymer, propylene-α alkene
Hydrocarbon copolymer, ethylene-propylene-diene copolymer, ethylene-propylene, Styrene copolymer, polyvinyl alcohol, polyvinyl acetate are poly-
Vinylacetate, stearic acid, styrol copolymer, polyethylene oxide, chlorinated polypropylene, epichlorohydrin rubber, inclined fluorine second
Alkenyl rubber, ethylene propylene rubber, polyethylene, butadiene-styrene rubber, nitrile rubber, hydrogenated nitrile-butadiene rubber, epichlorohydrin rubber and propylene
One of acid esters rubber is a variety of.
Further, the polymeric adhesive material is a kind of cross-linked structure selected from flexible polymer, on flexible polymer
With the functional group for accounting for 3-12% flexible polymer weight, the functional group at least one of flexible polymer is selected from by unsaturated group, carboxylic
Base, hydroxyl, amino, epoxy group.
Further, the polymeric binder needs to mix with a kind of solvent before use, while also in a binder
The weight proportion of addition active material particle and carbon conductor, solvent and binder is 10-40:1, active material particle and carbon conductor
Match from 10:1 to 1:5 with the weight of binder.
Further, the solvent be hydrocarbon, acetone, naphtha, acetic acid, acrylonitrile, toluene, dimethylbenzene, alcohol,
One of ethyl alcohol, methanol, vinyl acetate are a variety of.
Further, the multi-pass high temperature rolling of the electrode film band is that electrode composite material is passed through multipair hot roll
It is formed after rolling, wherein roll heating temperature is 100-200 DEG C.
Further, 50-100 microns of the thickness of the electrode film band.
Further, described adhesive coating is one of homopolymer and the copolymer of Kynoar (PVDF) or more
Kind.
Further, described adhesive coating material is a kind of flexible polymer, derivative for acrylic acid, methacrylic acid
Object, butyl acrylate, butyl methacrylate, poly hydroxy ethyl acrylate, polyacrylamide, polypropylene homopolymer or copolymerization
Object, n butyl acrylate styrene, acrylonitrile copolymer, butyl acrylate, butyl acrylate acrylonitrile methacrylic acid
Glycidyl ester copolymer, butyl rubber, isobutylene-styrene copolymer, polybutadiene, is gathered polyisobutene
Isoprene, butadiene-styrene block copolymer, styrene-isoprene block copolymer, acrylonitrile-butadiene copolymerization
Object, acrylonitrile-butadiene-styrene copolymer, butadiene-styrene block copolymer, s-B-S are embedding
Section copolymer, styrene-isoprene block copolymer, styrene-isoprene-styrene block copolymer, methyl-silicone oil,
Diphenylpolysiloxane, polysiloxanediol, liquid polyethylene, polypropylene, poly 1-butene, ethene-alpha-olefin copolymer, third
Alkene-alpha olefin copolymer, ethylene-propylene, Styrene copolymer, polyvinyl alcohol, gathers ethylene-propylene-diene copolymer (EPDM)
Vinyl alcohol polyvinyl acetate, stearic acid, styrol copolymer, polyethylene oxide, chlorinated polypropylene, epoxychloropropane rubber
Glue, vinylidene fluoride rubber, ethylene propylene rubber, polyethylene, butadiene-styrene rubber (SBR), nitrile rubber (NBR), hydrogenated butyronitrile rubber
One of glue (HNBR), epichlorohydrin rubber (CHR) and acrylic rubber (ACM) are a variety of.
Beneficial effect
The present invention provides a kind of effective dry-forming method of the electrode of lithium cell of manufacture high-performance and low cost, Du
The problems such as equipment investment is more, energy consumption is high, performance deficiency caused by usual wet processing absolutely.Method manufacturing step of the invention
It is few, reduce equipment investment；The raw material usage for forming electrode is reduced and cheap, such as the polymer-bonded of low cost can be used
Agent to replace fluoropolymer expensive used in current drying method (PTFE), and does not need to produce to remove solvent
Long time drying machine is dry in the process, and eliminates the multiple condensers or destilling tower being equipped with for recycling design, significantly
Reduce production and operating cost；Adhesive system combination has the transport of preferable lithium ion, and flexibility is high, and binding force is strong, high
Heat resistance, will lead to very high power density and longer battery cycle life, and enough high-flexibilities are efficiently given birth to convenient for establishing electrode
In production continuous rolling and it is compound needed for mechanical tension；By optimizing manufacturing process, reducing cost and improving performance, can get
High, the high and low contact resistance of power density and the high-performance energy storage electrode that has extended cycle life with energy density are suitable for lithium electricity
Pond electrode etc. can be widely popularized in fields such as new-energy automobiles, and market potential is huge.
Specific embodiment
A kind of dry-forming method of electrode of lithium cell, preparation method be by active material, conductive material additive,
The electrode composite material of polymeric binder composition forms electrode film through uniform mixing, fine crushing, multi-pass high temperature rolling
Band；The electrode film band is combined on electrode current collecting body by high hot rolling, coiled electrode of lithium cell is obtained, wherein high
The temperature of hot rolling is 100-200 DEG C, and the electrode current collecting body is the metallic foil with adhesive coating, electrode current collecting body packet
It includes anode and cathode, the collector of cathode is copper foil, positive collector is aluminium foil, and the active material, conductive material add
Adding agent, polymeric binder to account for the weight that accounts for of total mixture quality respectively is 70-98%, 0-10%, 2-20%, accounts for the preferred model of weight
It encloses for 80-95%, 0-5%, 3-15%.
In one embodiment, wherein positive electrode active materials include at least one selected from LiCoO2, LiNi1/3Co1/
3Mn1/3O2, LiNi0.8Co0.15Al0.05O2, Li1+xNi1/3Co1/3Mn1/3O2, wherein 0 < x < 0.8, LiMn2O4,
LiFePO4, Li2Mn2O4, LiNiCoAlO2, LiNiyCoxMzO, wherein M=Mn, Al, Sn, In, Ga or Ti and 0.15 < x
< 0.5,0.5 < y < 0.8 and 0 < z < 0.15, Li [Li (1-2y)/3NiyMn (2-y)/3] O2, Li [Li (1-y)/3CoyMn (2-
2y)/3] O2 and Li [NiyCo1-2yMny] O2, wherein 0 < y < 0.5, LiNiCoO2.MnO2, are rich in lithium compound Li1+y (Ni1/
3Co1/3Mn1/3) 1-yO2, wherein y=x/ (2+x) and x=0-0.33, and xLi2MnO3 (1-x) Li (NiCoMn) O2 and Li
(1+y) (Ni0.5Co0.2Mn0.3) 1-yO2, wherein y=x/ (2+x) and x=0-0.33, and LiMPO4, wherein M be V, Cr,
One of Mn, Fe, Co, and Ni or a variety of.The negative electrode active material be carbon, hard carbon, soft carbon, artificial graphite, natural graphite,
One of carbonaceous mesophase spherules, SnO2, TiO2, lithium titanate, NiAl2O4, SiO2, silicon are a variety of.
In one embodiment, the additive of conductive material therein is carbon black, acetylene carbon black, carbon nanotube, carbon nanometer
One of fiber, carbon fiber, coke, high surface area carbon, graphite, metallic particles and conducting polymer are a variety of.
In one embodiment, polymeric binder therein is a kind of not fluoro-containing copolymer adhesive, polymer bonding
Agent is a kind of flexible polymer, is acrylic or methacrylic acid derivative, butyl acrylate, butyl methacrylate, poly- first
Base hydroxy-ethyl acrylate, polyacrylamide, polypropylene homopolymer or copolymer, n butyl acrylate styrene acrylonitrile
Copolymer, butyl acrylate, butyl acrylate acrylonitrile glycidol methyl acrylate copolymer, polyisobutene, isobutene-are different
Pentadiene rubber, isobutylene-styrene copolymer, polybutadiene, polyisoprene, butadiene-styrene block copolymer, benzene
Ethylene-isoprene block copolymer, acrylonitrile-butadiene copolymer, acrylonitrile-butadiene-styrene copolymer, fourth two
Alkene-styrene block copolymer, Styrene-Butadiene-Styrene Block Copolymer, styrene-isoprene block copolymer,
Styrene-isoprene-styrene block copolymer, methyl-silicone oil, diphenylpolysiloxane, polysiloxanediol, liquid
Polyethylene, polypropylene, poly 1-butene, ethene-alpha-olefin copolymer, propylene-alpha olefin copolymer, Ethylene-Propylene-Diene copolymerization
It is object, ethylene-propylene, Styrene copolymer, polyvinyl alcohol, polyvinyl acetate polyvinyl acetate, stearic acid, styrene copolymerized
Object, polyethylene oxide, chlorinated polypropylene, epichlorohydrin rubber, vinylidene fluoride rubber, ethylene propylene rubber, polyethylene,
One of butylbenzene rubber, nitrile rubber, hydrogenated nitrile-butadiene rubber, epichlorohydrin rubber and acrylic rubber are a variety of.Polymer is viscous
Knot agent is a kind of cross-linked structure selected from flexible polymer, has the functional group for accounting for 3-12% flexible polymer weight on flexible polymer,
The functional group at least one of flexible polymer is selected from by unsaturated group, carboxyl, hydroxyl, amino, epoxy group.
In one embodiment, polymeric binder therein needs to mix with a kind of solvent before use, while also existing
The weight proportion of addition active material particle and carbon conductor in binder, solvent and binder is 10-40:1, active material particle
It is 10:1 to 1:5 with the weight proportion of carbon conductor and binder.
In one embodiment, solvent therein is hydrocarbon, acetone, naphtha, acetic acid, acrylonitrile, toluene, two
One of toluene, alcohol, ethyl alcohol, methanol, vinyl acetate are a variety of.
In one embodiment, the multi-pass high temperature rolling of electrode film band therein is by electrode composite material by more
To what is formed after hot roll rolling, wherein roll heating temperature is 100-200 DEG C.
In one embodiment, 50-100 microns of the thickness of electrode film band therein.Electrode current collecting body is to use simultaneously
A method of the metallic foil with adhesive coating, the adhesive formd in surface of active material transmission lithium ion apply
Layer.
In one embodiment, adhesive coating therein is in the homopolymer and copolymer of Kynoar (PVDF)
It is one or more, the polyolefine material with electron-withdrawing substituent, water-soluble binder.
In one embodiment, described adhesive coating material is a kind of flexible polymer, is acrylic acid, methacrylic acid
Derivative, butyl acrylate, butyl methacrylate, poly hydroxy ethyl acrylate, polyacrylamide, polypropylene homopolymer or
Copolymer, n butyl acrylate styrene, acrylonitrile copolymer, butyl acrylate, butyl acrylate acrylonitrile methyl-prop
Olefin(e) acid glycidyl ester copolymer, polyisobutene, butyl rubber, isobutylene-styrene copolymer, polybutadiene
Alkene, polyisoprene, butadiene-styrene block copolymer, styrene-isoprene block copolymer, acrylonitrile-butadiene
Copolymer, acrylonitrile-butadiene-styrene copolymer, butadiene-styrene block copolymer, styrene-butadiene-benzene second
Alkene block copolymer, styrene-isoprene block copolymer, styrene-isoprene-styrene block copolymer, methyl
Silicone oil, diphenylpolysiloxane, polysiloxanediol, liquid polyethylene, polypropylene, poly 1-butene, ethene-alpha-olefin copolymerization
Object, propylene-alpha olefin copolymer, ethylene-propylene-diene copolymer (EPDM), ethylene-propylene, Styrene copolymer, polyethylene
Alcohol, polyvinyl alcohol polyvinyl acetate, stearic acid, styrol copolymer, polyethylene oxide, chlorinated polypropylene, epoxy chloropropionate
Alkane rubber, vinylidene fluoride rubber, ethylene propylene rubber, polyethylene, butadiene-styrene rubber (SBR), nitrile rubber (NBR) hydrogenate fourth
One of nitrile rubber (HNBR), epichlorohydrin rubber (CHR) and acrylic rubber (ACM) are a variety of.
Binders for coatings polymer is directly contacted with the active material particle in electrode, so that active material and coating bond
Ion exchange between agent polymer will promote the lithium ion transport between active material and electrolyte solution, and then improve electricity
The potentiality of extremely internal bigger electric conductivity.It is a further advantage of the invention that being greatly reduced since used adhesive is less
Electric flow blockage between particle, therefore the process will lead to energy storage device with higher power.
The present invention provides a kind of effective dry-forming method of the electrode of lithium cell of manufacture high-performance and low cost, Du
The problems such as equipment investment is more, energy consumption is high, performance deficiency caused by usual wet processing absolutely.Method manufacturing step of the invention
It is few, reduce equipment investment；The raw material usage for forming electrode is reduced and cheap, such as the polymer-bonded of low cost can be used
Agent to replace fluoropolymer expensive used in current drying method (PTFE), and does not need to produce to remove solvent
Long time drying machine is dry in the process, and eliminates the multiple condensers or destilling tower being equipped with for recycling design, significantly
Reduce production and operating cost；Adhesive system combination has the transport of preferable lithium ion, and flexibility is high, and binding force is strong, high
Heat resistance, will lead to very high power density and longer battery cycle life, and enough high-flexibilities are efficiently given birth to convenient for establishing electrode
In production continuous rolling and it is compound needed for mechanical tension；By optimizing manufacturing process, reducing cost and improving performance, can get
High, the high and low contact resistance of power density and the high-performance energy storage electrode that has extended cycle life with energy density are suitable for lithium electricity
Pond electrode etc. can be widely popularized in fields such as new-energy automobiles, and market potential is huge.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to structure of the invention
Think and range is defined.Without departing from the design concept of the invention, ordinary people in the field is to technology of the invention
The all variations and modifications that scheme is made should all drop into protection scope of the present invention.
Claims (10)
1. a kind of dry-forming method of electrode of lithium cell, which is characterized in that preparation method is by active material, conductive material
Additive, polymeric binder composition electrode composite material formed through uniform mixing, fine crushing, multi-pass high temperature rolling
Electrode film band；The electrode film band is combined on electrode current collecting body by high hot rolling, obtains coiled lithium battery
Pole, the temperature of high temperature rolling are 100-200 DEG C, and the electrode current collecting body is the metallic foil with adhesive coating, electricity
Pole collector includes anode and cathode, the collector of cathode are copper foils, and positive collector is aluminium foil, and the active material is led
The weight that accounts for that the additive of electric material, polymeric binder account for total mixture quality respectively is 70-98%, 0-10%, 2-20%.
2. the dry-forming method of electrode of lithium cell as claimed in claim 2, which is characterized in that wherein positive electrode active materials packet
LiCoO2, LiNi1/3Co1/3Mn1/3O2, LiNi0.8Co0.15Al0.05O2, Li1+xNi1/3Co1/ are selected from containing at least one
3Mn1/3O2, wherein 0 < x < 0.8, LiMn2O4, LiFePO4, Li2Mn2O4, LiNiCoAlO2, LiNiyCoxMzO, wherein M=
Mn, Al, Sn, In, Ga or Ti and 0.15 < x < 0.5,0.5 < y < 0.8 and 0 < z < 0.15, Li [Li (1-2y)/3NiyMn (2-
Y)/3] O2, Li [Li (1-y)/3CoyMn (2-2y)/3] O2 and Li [NiyCo1-2yMny] O2, wherein 0 < y < 0.5,
LiNiCoO2.MnO2 is rich in lithium compound Li1+y (Ni1/3Co1/3Mn1/3) 1-yO2, wherein y=x/ (2+x) and x=0-
0.33, and xLi2MnO3 (1-x) Li (NiCoMn) O2 and Li (1+y) (Ni0.5Co0.2Mn0.3) 1-yO2, wherein (2 y=x/
+ x) and x=0-0.33, and LiMPO4, wherein M is one of V, Cr, Mn, Fe, Co, and Ni or a variety of.The cathode is living
Property material be carbon, hard carbon, soft carbon, artificial graphite, natural graphite, carbonaceous mesophase spherules, SnO2, TiO2, lithium titanate, NiAl2O4,
One of SiO2, silicon are a variety of.
3. the dry-forming method of electrode of lithium cell as described in claim 1, which is characterized in that the addition of the conductive material
Agent be carbon black, acetylene carbon black, carbon nanotube, carbon nano-fiber, carbon fiber, coke, high surface area carbon, graphite, metallic particles and
One of conducting polymer is a variety of.
4. the dry-forming method of electrode of lithium cell as described in claim 1, which is characterized in that the polymer adhesive is
A kind of not fluoro-containing copolymer adhesive, is a kind of flexible polymer, is acrylic or methacrylic acid derivative, acrylic acid fourth
Ester, butyl methacrylate, poly hydroxy ethyl acrylate, polyacrylamide, polypropylene homopolymer or copolymer, acrylic acid fourth
Ester-styrol copolymer acrylonitrile copolymer, butyl acrylate, butyl acrylate acrylonitrile glycidol methyl acrylate copoly
Object, polyisobutene, butyl rubber, isobutylene-styrene copolymer, polybutadiene, polyisoprene, fourth two
Alkene-styrene block copolymer, styrene-isoprene block copolymer, acrylonitrile-butadiene copolymer, acrylic nitrile-butadiene two
Alkene-styrol copolymer, butadiene-styrene block copolymer, Styrene-Butadiene-Styrene Block Copolymer, benzene second
The poly- silicon oxygen of alkene-isoprene block copolymer, styrene-isoprene-styrene block copolymer, methyl-silicone oil, diphenyl
Alkane, polysiloxanediol, liquid polyethylene, polypropylene, poly 1-butene, ethene-alpha-olefin copolymer, propylene-alpha olefin copolymerization
Object, ethylene-propylene-diene copolymer, ethylene-propylene, Styrene copolymer, polyvinyl alcohol, polyvinyl acetate poly-vinegar acid second
Enester, stearic acid, styrol copolymer, polyethylene oxide, chlorinated polypropylene, epichlorohydrin rubber, vinylidene fluoride rubber
Glue, ethylene propylene rubber, polyethylene, butadiene-styrene rubber, nitrile rubber, hydrogenated nitrile-butadiene rubber, epichlorohydrin rubber and acrylate rubber
One of glue is a variety of.
5. the dry-forming method of electrode of lithium cell as described in claim 1, which is characterized in that the polymeric adhesive material
It is a kind of cross-linked structure selected from flexible polymer, there is the functional group for accounting for 3-12% flexible polymer weight on flexible polymer, it is soft poly-
The functional group at least one for closing object is selected from by unsaturated group, carboxyl, hydroxyl, amino, epoxy group.
6. the dry-forming method of electrode of lithium cell as described in claim 1, which is characterized in that the polymeric binder makes
It is mixed with preceding needs with a kind of solvent, while also adding active material particle and carbon conductor, solvent and binder in a binder
Weight proportion be the weight proportion of 10-40:1, active material particle and carbon conductor and binder from 10:1 to 1:5.
7. the dry-forming method of electrode of lithium cell as claimed in claim 6, which is characterized in that the solvent is nytron
One of object, acetone, naphtha, acetic acid, acrylonitrile, toluene, dimethylbenzene, alcohol, ethyl alcohol, methanol, vinyl acetate are a variety of.
8. the dry-forming method of electrode of lithium cell as described in claim 1, the multi-pass high temperature rolling of the electrode film band
It is by electrode composite material by being formed after multipair hot roll rolling, wherein roll heating temperature is 100-200 DEG C.
9. the dry-forming method of electrode of lithium cell as described in claim 1, which is characterized in that the thickness of the electrode film band
50-100 microns of degree.
10. the dry-forming method of electrode of lithium cell as described in claim 1, which is characterized in that the electrode current collecting body is
Using a kind of metallic foil with adhesive coating；Described adhesive coating is the homopolymer of Kynoar (PVDF) and is total to
One of polymers is a variety of；Described adhesive coating material is a kind of flexible polymer, derivative for acrylic acid, methacrylic acid
Object, butyl acrylate, butyl methacrylate, poly hydroxy ethyl acrylate, polyacrylamide, polypropylene homopolymer or copolymerization
Object, n butyl acrylate styrene, acrylonitrile copolymer, butyl acrylate, butyl acrylate acrylonitrile methacrylic acid
Glycidyl ester copolymer, butyl rubber, isobutylene-styrene copolymer, polybutadiene, is gathered polyisobutene
Isoprene, butadiene-styrene block copolymer, styrene-isoprene block copolymer, acrylonitrile-butadiene copolymerization
Object, acrylonitrile-butadiene-styrene copolymer, butadiene-styrene block copolymer, s-B-S are embedding
Section copolymer, styrene-isoprene block copolymer, styrene-isoprene-styrene block copolymer, methyl-silicone oil,
Diphenylpolysiloxane, polysiloxanediol, liquid polyethylene, polypropylene, poly 1-butene, ethene-alpha-olefin copolymer, third
Alkene-alpha olefin copolymer, ethylene-propylene, Styrene copolymer, polyvinyl alcohol, gathers ethylene-propylene-diene copolymer (EPDM)
Vinyl alcohol polyvinyl acetate, stearic acid, styrol copolymer, polyethylene oxide, chlorinated polypropylene, epoxychloropropane rubber
Glue, vinylidene fluoride rubber, ethylene propylene rubber, polyethylene, butadiene-styrene rubber (SBR), nitrile rubber (NBR), hydrogenated butyronitrile rubber
One of glue (HNBR), epichlorohydrin rubber (CHR) and acrylic rubber (ACM) are a variety of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811630834.5A CN109755473A (en) | 2018-12-29 | 2018-12-29 | A kind of dry-forming method of electrode of lithium cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811630834.5A CN109755473A (en) | 2018-12-29 | 2018-12-29 | A kind of dry-forming method of electrode of lithium cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109755473A true CN109755473A (en) | 2019-05-14 |
Family
ID=66404274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811630834.5A Pending CN109755473A (en) | 2018-12-29 | 2018-12-29 | A kind of dry-forming method of electrode of lithium cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109755473A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111613775A (en) * | 2020-05-20 | 2020-09-01 | 东莞东阳光科研发有限公司 | Electrode plate and preparation method and application thereof |
| CN112635701A (en) * | 2020-12-21 | 2021-04-09 | 天目湖先进储能技术研究院有限公司 | Lithium battery electrode and dry preparation method and application thereof |
| CN112670483A (en) * | 2020-12-25 | 2021-04-16 | 合肥国轩高科动力能源有限公司 | Positive plate, positive polar plate and solid-state battery |
| CN116487519A (en) * | 2023-06-26 | 2023-07-25 | 江苏正力新能电池技术有限公司 | Dry electrode, preparation method thereof and battery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012069358A (en) * | 2010-09-22 | 2012-04-05 | Nissan Motor Co Ltd | Electrode drying method and electrode drying apparatus |
| CN105489388A (en) * | 2015-12-28 | 2016-04-13 | 宁波南车新能源科技有限公司 | Lithium-ion capacitor electrode and preparation method thereof |
| CN106654177A (en) * | 2016-11-29 | 2017-05-10 | 宁波中车新能源科技有限公司 | Method for preparing battery capacitor composite electrode by dry method |
| CN107658139A (en) * | 2017-10-16 | 2018-02-02 | 池州市修典新能源科技有限公司 | A kind of lithium electric capacity negative electrode and preparation method thereof |
| CN107768145A (en) * | 2017-10-16 | 2018-03-06 | 池州市修典新能源科技有限公司 | A kind of energy storage electrode and preparation method thereof |
-
2018
- 2018-12-29 CN CN201811630834.5A patent/CN109755473A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012069358A (en) * | 2010-09-22 | 2012-04-05 | Nissan Motor Co Ltd | Electrode drying method and electrode drying apparatus |
| CN105489388A (en) * | 2015-12-28 | 2016-04-13 | 宁波南车新能源科技有限公司 | Lithium-ion capacitor electrode and preparation method thereof |
| CN106654177A (en) * | 2016-11-29 | 2017-05-10 | 宁波中车新能源科技有限公司 | Method for preparing battery capacitor composite electrode by dry method |
| CN107658139A (en) * | 2017-10-16 | 2018-02-02 | 池州市修典新能源科技有限公司 | A kind of lithium electric capacity negative electrode and preparation method thereof |
| CN107768145A (en) * | 2017-10-16 | 2018-03-06 | 池州市修典新能源科技有限公司 | A kind of energy storage electrode and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111613775A (en) * | 2020-05-20 | 2020-09-01 | 东莞东阳光科研发有限公司 | Electrode plate and preparation method and application thereof |
| CN112635701A (en) * | 2020-12-21 | 2021-04-09 | 天目湖先进储能技术研究院有限公司 | Lithium battery electrode and dry preparation method and application thereof |
| CN112670483A (en) * | 2020-12-25 | 2021-04-16 | 合肥国轩高科动力能源有限公司 | Positive plate, positive polar plate and solid-state battery |
| CN116487519A (en) * | 2023-06-26 | 2023-07-25 | 江苏正力新能电池技术有限公司 | Dry electrode, preparation method thereof and battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10923707B2 (en) | Dry process method for producing electrodes for electrochemical devices and electrodes for electrochemical devices | |
| JP7195414B2 (en) | Separator and electrochemical device | |
| CN104008893B (en) | The preparation method of lithium ion hybrid capacitors and lithium ion hybrid capacitors thereof | |
| CN109755473A (en) | A kind of dry-forming method of electrode of lithium cell | |
| CN111900392B (en) | Positive plate and lithium ion battery containing same | |
| WO2022037092A1 (en) | Current collector, pole piece and battery | |
| CN106058245A (en) | Low temperature lithium ion battery | |
| CN110247013B (en) | Positive pole piece and electrochemical device containing same | |
| CN112467075B (en) | Pole piece, electric core and secondary battery | |
| CN107112539B (en) | Binder composition for secondary battery electrode, slurry composition for secondary battery electrode, electrode for secondary battery, and secondary battery | |
| US20130171523A1 (en) | Lithium-ion secondary battery and the cathode material thereof | |
| KR20230019962A (en) | Electrode sheet and lithium ion battery | |
| CN111799470B (en) | Positive pole piece and sodium ion battery | |
| CN108511752A (en) | Modified graphite cathode material and preparation method thereof and secondary cell | |
| CN109119632A (en) | Positive electrode slurry, positive plate and lithium ion battery | |
| CN112201783A (en) | Positive pole piece for lithium ion battery with high cost performance and long cycle life | |
| CN112349900A (en) | Negative pole piece and lithium ion battery containing same | |
| US20220223836A1 (en) | Positive electrode plate, and electrochemical apparatus and electronic apparatus including such positive electrode plate | |
| CN114695838B (en) | Positive electrode plate of lithium battery, preparation method of positive electrode plate and lithium battery adopting positive electrode plate | |
| CN112599719A (en) | Negative plate, preparation method of negative plate and battery | |
| CN109461935A (en) | Electrode slice and electrochemical energy storage device | |
| JP2000011991A (en) | Organic electrolyte secondary battery | |
| CN114597335A (en) | Negative plate and battery comprising same | |
| KR20230013081A (en) | Anode of hybrid capacitor and its manufacturing method and use | |
| CN111430658A (en) | Electrode sheet and 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 |
Application publication date: 20190514 |
|
| RJ01 | Rejection of invention patent application after publication |