CN105788887B - A kind of compound binding agent, using pole piece of compound binding agent preparation and preparation method thereof, application - Google Patents
A kind of compound binding agent, using pole piece of compound binding agent preparation and preparation method thereof, application Download PDFInfo
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- CN105788887B CN105788887B CN201610277795.XA CN201610277795A CN105788887B CN 105788887 B CN105788887 B CN 105788887B CN 201610277795 A CN201610277795 A CN 201610277795A CN 105788887 B CN105788887 B CN 105788887B
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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
- H01M4/623—Binders being polymers fluorinated polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- 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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- 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
-
- 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
- Y02E60/13—Energy storage using capacitors
Abstract
The present invention relates to a kind of compound binding agents, the pole piece prepared using the compound binding agent and preparation method thereof, application, belong to energy storage device technical field.Compound binding agent of the invention by forming following weight percentage components: phosphatase 11 %~13%, Kynoar 20%~45%, phenolic resin 5%~9%, amino resins 2%~3%, polyacrylate 6%~11%, acrylate based terpolymers latex 10%~30%, sodium carboxymethylcellulose 1%~4%, polyimides 3%~17%, ethyl alcohol 2%~4%, N-Methyl pyrrolidone 6%~18%.Compound binding agent of the invention can reduce the problems such as electrode dusting, removing of internal resistance and pole piece volume expansion initiation of lithium ion battery or supercapacitor, improve electrode material utilization and cycle life.
Description
Technical field
The present invention relates to a kind of compound binding agent, the pole piece prepared using the compound binding agent and preparation method thereof, apply,
Belong to energy storage device technical field.
Background technique
Binder is very important component part in lithium ion battery and the electrode material of supercapacitor, binder
Main function is bonding and keeps active material, is enhanced between electrode active material and conductive agent and active material and collector
Electronic contact, the structure of preferably stable pole piece.Moreover, swollen for volume of the lithium ion cell electrode in charge and discharge process
Swollen/to shrink, binder can play definitely buffer function.In general, the performance of binder, such as cohesive force, flexibility, resistance to
Alkalinity, hydrophily etc., directly affect the performance of lithium ion battery or supercapacitor, the type of binder and with content shadow
Capacity, cycle life and the internal resistance of lithium ion battery or supercapacitor are rung, suitable binder is to the circulation for improving battery
Performance, quick charge and discharge ability and the internal resistance for reducing battery etc. have facilitation.
Lithium ion battery and the common binder of supercapacitor mainly include Kynoar (PVDF), carboxymethyl at present
Cellulose (CMC), poly- SBR emulsion (SBR), CMC-SBR mixed system, sodium alginate, polyacrylic acid (PAA) etc..In recent years
Come the study found that for high-capacity electrode material, especially silicon based anode material, volume expansion reaches in charge and discharge process
300% or more, internal stress caused by violent volume change easily leads to the dusting of electrode, peels off, and leads to battery performance sharply
Deteriorate.And for porous and big surface area electrode material, the content of binder in electrode material is promoted simply, it will
Increase pole piece resistance, substantially reduces the energy density and its comprehensive performance (such as power, coulomb of lithium ion battery or supercapacitor
Efficiency, cycle life etc.) performance.
Summary of the invention
It can reduce pole piece internal resistance and the strong compound binding agent of caking property the purpose of the present invention is to provide a kind of.The present invention
Purpose also reside in provide using above-mentioned compound binding agent pole piece and the pole piece preparation method, preparing lithium ion battery
Or the application in terms of supercapacitor.
To achieve the above object, the technical solution of compound binding agent of the invention is:
Compound binding agent of the invention, by forming following weight percentage components: phosphatase 11 %~13%, polyvinylidene fluoride
Alkene 20%~45%, phenolic resin 5%~9%, amino resins 2%~3%, polyacrylate 6%~11%, esters of acrylic acid
Terpolymer latex 10%~30%, sodium carboxymethylcellulose 1%~4%, polyimides 3%~17%, ethyl alcohol 2%~
4%, N-Methyl pyrrolidone 6%~18%.
The mass concentration of the phosphoric acid is 10-30%.
The amino resins is one of methyl-etherified melamine resin, ether melamine resin.
The polyacrylate is one of polymethyl methacrylate, fluorine-containing polymethacrylates.
The acrylate based terpolymers latex is Tri- n -butyltin methacrylate terpolymer latex, contains methyl fluoride
One of acrylate based terpolymers latex.
The preparation method of above-mentioned compound binding agent include: by the phosphoric acid, Kynoar, phenolic resin, amino resins,
Polyacrylate, acrylate based terpolymers latex, sodium carboxymethylcellulose, polyimides, ethyl alcohol, N- crassitude
Ketone is uniformly mixed to obtain the final product.
The acrylate based terpolymers latex is total for methyl methacrylate-butyl acrylate-acrylic acid ternary
One of copolymer latex, methyl methacrylate-butyl acrylate-fluorine-containing methacrylate terpolymer latex.Its
" fluorine-containing ternary propylene can be used in middle methyl methacrylate-butyl acrylate-fluorine-containing methacrylate terpolymer latex
The synthesis and performance of acid esters emulsion copolymers " (recording, it is beautiful etc. to know, applied chemistry, 2004 (9)).
The technical solution of pole piece of the invention is:
A kind of pole piece prepared using above-mentioned compound binding agent.
The pole piece includes collector and attachment electrode material layer on a current collector, the electrode material layer mainly by
Electrode active material is made with above-mentioned compound binding agent.
The pole piece is made by the method included the following steps: by the compound binding agent, electrode active material, conductive agent
It is uniformly mixed to prepare electrode slurry with solvent, electrode slurry is coated in collection liquid surface, is drying to obtain.
The solvent is one or more of N-Methyl pyrrolidone, ethyl alcohol, deionized water.
The technical solution of the preparation method of pole piece of the invention is:
The preparation method of above-mentioned pole piece includes the following steps:
1) compound binding agent is added in solvent, is mixed to prepare glue；Electrode active material is added in glue, leads
Electric agent, is mixed to prepare electrode slurry；
2) it on a current collector by electrode slurry coating, is drying to obtain.
The mass ratio of electrode active material and compound binding agent is 80-97:2-20 in step 1).Electrode active material is led
The mass ratio of electric agent and compound binding agent is 80-97:0-15:2-20.Further preferably 80-97:1-15:2-20.
The solid content of glue described in step 1) is 4%-12%.
The solvent is one or more of N-Methyl pyrrolidone, ethyl alcohol, deionized water.
Mixing in step 1) when glue liquid is under vacuum conditions, to stir 2-5h with the revolving speed of 500-1000rpm.It is described
The vacuum degree of vacuum condition is -0.01~-0.10MPa.The temperature when stirring is 25-70 DEG C.
Mixing in step 1) when electrode slurry processed is the revolving speed stirring 2-6h with 2000-4000rpm, then with 500-
The revolving speed of 1000rpm stirs 1-3h.The viscosity of the electrode slurry is 2000-6000mPas.
Dry temperature is 80-120 DEG C in step 2).Roll-in is carried out after drying.
The pole piece be positive plate or negative electrode tab, it is corresponding, the electrode active material be positive active material or
Negative electrode active material, the positive active material are LiFePO 4, cobalt acid lithium, nickel ion doped, LiMn2O4, lithium-rich manganese-based solid solution
One or more of body, phosphoric acid vanadium lithium, tertiary cathode material.
The negative electrode active material be mesocarbon microspheres, artificial graphite, natural graphite, soft carbon, hard carbon, carbon nanotube,
One or more of lithium titanate, silicon based anode material, tin base cathode material.
The conductive agent is one of acetylene black, conductive carbon black, electrically conductive graphite, carbon fiber, carbon nanotube, metallic fiber
Or it is several.
The technical solution of the application of pole piece of the invention in terms of preparing lithium ion battery or supercapacitor is:
A kind of application of above-mentioned pole piece in terms of preparing lithium ion battery or supercapacitor.Its specific preparation side
Method includes:
Pole piece, diaphragm are assembled into battery core, enter shell, infuses electrolyte, is encapsulated to get lithium ion battery or supercapacitor.
The diaphragm be polyethene microporous membrane, microporous polypropylene membrane, inorganic ceramic membrane, cellulose paper diaphragm and non-woven fabrics every
At least one of film.Preferably, diaphragm is PP/PE/PP composite membrane.
The electrolyte includes electrolyte and organic solvent, and the electrolyte is LiBF4, lithium hexafluoro phosphate, tetrafluoro
One of tetraethylammonium borate, tetrafluoro boric acid triethyl ammonium are several.
The organic solvent is ethylene carbonate, propene carbonate, vinylene carbonate, dimethyl carbonate, carbonic acid diethyl
One or more of ester, methyl ethyl carbonate, gamma-butyrolacton, acetonitrile, sulfolane, n,N dimethylformamide.Preferably, have
Solvent is the mixed solvent that EC, DEC, DMC, EMC are mixed to get according to volume ratio 1:1:1:3.
The concentration of the electrolyte is 1.2mol/L.
Compound binding agent of the invention can overcome deficiency in the prior art, reduce lithium ion battery or supercapacitor
Internal resistance and pole piece volume expansion cause electrode dusting, removing the problems such as, improve electrode material utilization and cycle life, make
The lithium ion battery made of compound binding agent of the invention or supercapacitor have low internal resistance, long circulation life and high safety
The features such as property.
Specific embodiment
Embodiments of the present invention are described further below.
Pole piece of the invention includes the electrode material layer of collector and coating on a current collector.Pole piece can be anode
Piece, or negative electrode tab.The positive plate that lithium ion battery uses includes plus plate current-collecting body aluminium foil and coated on aluminium foil
Positive electrode material layer, the negative electrode tab that lithium ion battery uses include negative current collector copper foil and coated in the negative electrode material on copper foil
Layer.
Embodiment 1
The compound binding agent of the present embodiment by forming following weight percentage components: phosphatase 11 %, Kynoar
20%, phenolic resin 5%, methyl-etherified melamine resin 2%, polymethyl methacrylate 6%, methyl methacrylate-the third
Olefin(e) acid butyl ester-acrylic ternary copolymer latex 30%, sodium carboxymethylcellulose 1%, polyimides 15%, ethyl alcohol 2%, N- first
Base pyrrolidones 18%.The mass fraction of above-mentioned phosphoric acid is 20%.
The preparation method of above-mentioned compound binding agent include the following steps: by the phosphoric acid, Kynoar, phenolic resin,
Methyl-etherified melamine resin, polymethyl methacrylate, methyl methacrylate-butyl acrylate-acrylic acid ternary polymerization
Object latex, sodium carboxymethylcellulose, polyimides, ethyl alcohol, N-Methyl pyrrolidone are uniformly mixed to obtain the final product.
The positive plate of the present embodiment is prepared using above-mentioned compound binding agent, and preparation method is specific as follows:
1) above-mentioned compound binding agent is added in solvent N-methyl pyrilidone (NMP), be in 55 DEG C and vacuum degree-
Under conditions of 0.08MPa, 3h is stirred with the speed of 800rpm, the glue that solid content is 8% is made, positive active material cobalt is added
Sour lithium (LiCoO2) and conductive agent Super P, above-mentioned positive active material, conductive agent, compound binding agent weight ratio be 96:2:
2；4h is stirred with the speed of 3500rpm, then 2h is stirred with the speed of 800rpm, the anode slurry that viscosity is 3000mPas is made
Material；
2) anode sizing agent is spread evenly across on plus plate current-collecting body aluminium foil, it is dry at 110 DEG C, through roll squeezer roll-in, obtain
Positive plate.
The negative electrode tab of the present embodiment is prepared using above-mentioned compound binding agent, and preparation method is specific as follows:
1) above-mentioned compound binding agent is added in solvent N-methyl pyrilidone (NMP), be in 55 DEG C and vacuum degree-
Under conditions of 0.08MPa, 3h is stirred with the speed of 800rpm, the glue that mass fraction is 8% is made, negative electrode active material is added
Silicon-carbon and conductive agent Super P stir 4h with the speed of 3500rpm, then stir 2h with the speed of 800rpm, and obtained viscosity is
The negative electrode slurry of 3000mPas；
2) negative electrode slurry is spread evenly across on negative current collector copper foil, it is dry at a temperature of 110 DEG C, through roll squeezer roller
Pressure, obtains negative electrode tab.Above-mentioned negative electrode active material, conductive agent, compound binding agent weight ratio be 95.5:2:2.5.
The lithium ion battery of the present embodiment includes above-mentioned positive plate, above-mentioned negative electrode tab, diaphragm, electrolyte, diaphragm PP/
PE/PP composite membrane, electrolyte include electrolyte and organic solvent, and electrolyte is lithium hexafluoro phosphate (LiPF6), lithium hexafluoro phosphate exists
Concentration in electrolyte is 1.2mol/L, and organic solvent EC, DEC, DMC, EMC are mixed to get according to volume ratio 1:1:1:3
Mixed solvent.
The preparation method of above-mentioned lithium ion battery includes the following steps: above-mentioned positive plate, above-mentioned negative electrode tab, diaphragm folded
Lamination forms on piece machine, is assembled into battery core, enters shell, injects electrolyte, encapsulates to get lithium ion battery；With the work of 3.0-4.2V
Make voltage to carry out lithium ion battery pre- charge and discharge 3 weeks, constant current density C/5.
Embodiment 2
The compound binding agent of the present embodiment, by forming following weight percentage components: phosphatase 11 3%, Kynoar
45%, phenolic resin 7%, methyl-etherified melamine resin 2.5%, polymethyl methacrylate 8.5%, methyl methacrylate
Ester-butylacrylate-acrylic acid terpolymer latex 10%, sodium carboxymethylcellulose 2%, polyimides 3%, ethyl alcohol 3%,
N-Methyl pyrrolidone 6%.The mass fraction of above-mentioned phosphoric acid is 10%.
The preparation method of the compound binding agent of the present embodiment includes the following steps: the phosphoric acid, Kynoar, phenolic aldehyde
Resin, methyl-etherified melamine resin, polymethyl methacrylate, methyl methacrylate-butyl acrylate-acrylic acid ternary
Copolymer latices, sodium carboxymethylcellulose, polyimides, ethyl alcohol, N-Methyl pyrrolidone are uniformly mixed to obtain the final product.
The positive plate of the present embodiment is prepared using above-mentioned compound binding agent, and preparation method is specific as follows:
1) above-mentioned compound binding agent is added in solvent N-methyl pyrilidone (NMP), be in 70 DEG C and vacuum degree-
Under conditions of 0.01MPa, 5h is stirred with the speed of 500rpm, the glue that solid content is 4% is made, positive active material phosphorus is added
Ferrous silicate lithium and conductive agent Super P, positive active material, conductive agent, above-mentioned compound binding agent weight ratio be 96:2:2；With
The speed of 2000rpm stirs 6h, then stirs 3h with the speed of 500rpm, and the anode sizing agent that viscosity is 5000mPas is made；
2) anode sizing agent is spread evenly across on plus plate current-collecting body aluminium foil, it is dry at 80 DEG C, through roll squeezer roll-in, obtain just
Pole piece.
The negative electrode tab of the present embodiment is prepared using above-mentioned compound binding agent, and preparation method is specific as follows:
1) above-mentioned compound binding agent is added in solvent N-methyl pyrilidone (NMP), be in 70 DEG C and vacuum degree-
Under conditions of 0.01MPa, 5h is stirred with the speed of 500rpm, the glue that solid content is 4% is made, it is hard that negative electrode active material is added
Carbon and conductive agent Super P, negative electrode active material, conductive agent, above-mentioned compound binding agent weight ratio be 95.5:2:2.5；With
The speed of 2000rpm stirs 6h, then stirs 3h with the speed of 500rpm, and the negative electrode slurry that viscosity is 5000mPas is made；
2) negative electrode slurry is spread evenly across on negative current collector copper foil, it is dry at a temperature of 80 DEG C, through roll squeezer roll-in,
Obtain negative electrode tab.
The lithium ion battery of the present embodiment includes above-mentioned positive plate, above-mentioned negative electrode tab, diaphragm, electrolyte, diaphragm PP/
PE/PP composite membrane, electrolyte include electrolyte and organic solvent, and electrolyte is lithium hexafluoro phosphate (LiPF6), lithium hexafluoro phosphate exists
Concentration in electrolyte is 1.2mol/L, and organic solvent EC, DEC, DMC, EMC are mixed to get according to volume ratio 1:1:1:3
Mixed solvent.
The preparation method of above-mentioned lithium ion battery includes the following steps: above-mentioned positive plate, above-mentioned negative electrode tab, diaphragm folded
Lamination forms on piece machine, is assembled into battery core, enters shell, injects electrolyte, encapsulates to get lithium ion battery；With the work of 3.0-4.2V
Make voltage to carry out lithium ion battery pre- charge and discharge 3 weeks, constant current density C/5.
Embodiment 3
The compound binding agent of the present embodiment, by forming following weight percentage components: phosphoric acid 7%, Kynoar
30%, phenolic resin 9%, methyl-etherified melamine resin 3%, polymethyl methacrylate 11%, methyl methacrylate-the third
Olefin(e) acid butyl ester-acrylic ternary copolymer latex 15%, sodium carboxymethylcellulose 4%, polyimides 7%, ethyl alcohol 4%, N- first
Base pyrrolidones 10%.The mass fraction of above-mentioned phosphoric acid is 20%.
The preparation method of the compound binding agent of the present embodiment includes the following steps: the phosphoric acid, Kynoar, phenolic aldehyde
Resin, methyl-etherified melamine resin, polymethyl methacrylate, methyl methacrylate-butyl acrylate-acrylic acid ternary
Copolymer latices, sodium carboxymethylcellulose, polyimides, ethyl alcohol, N-Methyl pyrrolidone are uniformly mixed to obtain the final product.
The positive plate of the present embodiment is prepared using above-mentioned compound binding agent, and preparation method is specific as follows:
1) above-mentioned compound binding agent is added in solvent N-methyl pyrilidone (NMP), be in 25 DEG C and vacuum degree-
Under conditions of 0.1MPa, 2h is stirred with the speed of 1000rpm, the glue that solid content is 12% is made, positive active material is added
Rich lithium manganese base solid solution and conductive agent Super P, positive active material, conductive agent, above-mentioned compound binding agent weight ratio be 96:
2:2；2h is stirred with the speed of 4000rpm, then 1h is stirred with the speed of 1000rpm, the anode that viscosity is 4000mPas is made
Slurry；
2) anode sizing agent is spread evenly across on plus plate current-collecting body aluminium foil, it is dry at 120 DEG C, through roll squeezer roll-in, obtain
Positive plate.
The negative electrode tab of the present embodiment is prepared using above-mentioned compound binding agent, and preparation method is specific as follows:
1) above-mentioned compound binding agent is added in solvent N-methyl pyrilidone (NMP), be in 25 DEG C and vacuum degree-
Under conditions of 0.1MPa, 2h is stirred with the speed of 1000rpm, the glue that solid content is 12% is made, negative electrode active material is added
Artificial graphite and conductive agent Super P, negative electrode active material, conductive agent, above-mentioned compound binding agent weight ratio be 95.5:2:
2.5；2h is stirred with the speed of 4000rpm, then 1h is stirred with the speed of 1000rpm, the cathode that viscosity is 4000mPas is made
Slurry；
2) negative electrode slurry is spread evenly across on negative current collector copper foil, it is dry at a temperature of 120 DEG C, through roll squeezer roller
Pressure, obtains negative electrode tab.
The lithium ion battery of the present embodiment includes above-mentioned positive plate, above-mentioned negative electrode tab, diaphragm, electrolyte, diaphragm PP/
PE/PP composite membrane, electrolyte include electrolyte and organic solvent, and electrolyte is lithium hexafluoro phosphate (LiPF6), lithium hexafluoro phosphate exists
Concentration in electrolyte is 1.2mol/L, and organic solvent EC, DEC, DMC, EMC are mixed to get according to volume ratio 1:1:1:3
Mixed solvent.
The preparation method of above-mentioned lithium ion battery includes the following steps: above-mentioned positive plate, above-mentioned negative electrode tab, diaphragm folded
Lamination forms on piece machine, is assembled into battery core, enters shell, injects electrolyte, encapsulates to get lithium ion battery；With the work of 3.0-4.2V
Make voltage to carry out lithium ion battery pre- charge and discharge 3 weeks, constant current density C/5.
Embodiment 4
The compound binding agent of the present embodiment, by forming following weight percentage components: phosphatase 11 0%, Kynoar
40%, phenolic resin 9%, ether melamine resin 3%, fluorine-containing polymethacrylates 11%, methyl methacrylate-
Butyl acrylate-fluorine-containing methacrylate terpolymer latex 10%, sodium carboxymethylcellulose 4%, polyimides 3%,
Ethyl alcohol 4%, N-Methyl pyrrolidone 6%.The mass fraction of above-mentioned phosphoric acid is 10%.
The preparation method of the compound binding agent of the present embodiment includes the following steps: the phosphoric acid, Kynoar, phenolic aldehyde
Resin, ether melamine resin, fluorine-containing polymethacrylates, methyl methacrylate-butyl acrylate-contain methyl fluoride
Acrylate terpolymer latex, sodium carboxymethylcellulose, polyimides, ethyl alcohol, N-Methyl pyrrolidone are uniformly mixed i.e.
?.
The pole piece of the present embodiment is prepared using above-mentioned compound binding agent, and preparation method is specific as follows:
1) above-mentioned compound binding agent is added in solvent N-methyl pyrilidone, is -0.06MPa's in 60 DEG C and vacuum degree
Under the conditions of, 4h is stirred with the speed of 800rpm, the glue that solid content is 5% is made, electrode activity thing activated carbon is added and leads
Electric agent Super P, electrode active material, conductive agent, compound binding agent weight ratio be 88:8:4；It is stirred with the speed of 4000rpm
5h is mixed, then 3h is stirred with the speed of 1000rpm, the electrode slurry that viscosity is 3000mPas is made；
2) electrode slurry is spread evenly across in current collector aluminum foil, it is dry at 110 DEG C, through roll squeezer roll-in, obtain pole piece.
The supercapacitor of the present embodiment includes above-mentioned pole piece, diaphragm, electrolyte, and diaphragm is that cellulose paper diaphragm is compound
Film, TEABF4/ PC solution, the concentration of electrolyte are 1.2mol/L.
The preparation method of above-mentioned lithium ion battery includes the following steps: for above-mentioned pole piece, diaphragm to be wound on the winder
Type is assembled into battery core, enters shell, injects electrolyte, encapsulates to get supercapacitor；With the operating voltage of 0-2.7V to super electricity
Container carries out pre- charge and discharge 3 weeks, constant current density 1C.
Comparative example 1
Using PVDF as binder, by cobalt acid lithium (LiCoO2), conductive agent Super P, binder PVDF mass ratio be 96:
Positive plate is made in 2:2；Using CMC as thickener, SBR is binder, by silicon-carbon cathode, conductive agent Super P, thickener CMC, is glued
Knot agent SBR mass ratio is that negative electrode tab is made in 95.5:2:1:1.5, other identical as in embodiment 1.
Comparative example 2
Using PTFE as binder, electrode is made by active carbon, conductive agent Super P, binder PTFE mass ratio 88:8:4
Piece is other identical as in embodiment 4.
Experimental example
By in each embodiment and comparative example lithium ion battery or supercapacitor test the efficiency, negative of its first charge-discharge
The peel strength of pole pole piece, completely fill negative electrode tab expansion rate, Equivalent DC internal resistance (supercapacitor only test pole piece peel strength and
Equivalent DC internal resistance), test result is as shown in table 1.
Lithium ion battery or performance of the supercapacitor in table 1 embodiment 1-4 and comparative example 1-2
As can be seen from the above table, opposite common bond, uses lithium ion battery made from compound binding agent of the invention
Or the negative electrode tab peel strength of supercapacitor, first charge-discharge efficiency are higher, completely fill in negative electrode tab expansion rate and Equivalent DC
Hindering relatively low, of the invention compound binding agent has certain buffer function to electrode expansion/contraction, reduces electrode volume
It is congruency will to greatly improve active material utilization, cycle life and peace for the problems such as expanding the electrode dusting caused, removing
Energy.
Claims (3)
1. a kind of pole piece, it is characterised in that: be made by the method included the following steps:
1) compound binding agent is added in solvent, is mixed to prepare glue；Electrode active material, conductive agent are added in glue, mixes
It closes and electrode slurry is made；The mass ratio of the electrode active material, conductive agent and compound binding agent is 80-97:0-15:2-20；
The solid content of the glue is 4%-12%；The solvent is N-Methyl pyrrolidone；
2) it on a current collector by the coating of electrode slurry made from step 1), is drying to obtain；Mixing in step 1) when glue liquid is
Under vacuum conditions, 2-5h being stirred with the revolving speed of 500-1000rpm, the vacuum degree of the vacuum condition is -0.01~-
0.10Mpa, the temperature when stirring are 25-70 DEG C；Mixing in step 1) when electrode slurry processed is with 2000-4000rpm
Revolving speed stir 2-6h, then 1-3h is stirred with the revolving speed of 500-1000rpm；The viscosity of the electrode slurry is 2000-
6000mPa·s；
The compound binding agent by forming following weight percentage components: phosphatase 11 %~13%, Kynoar 20%~45%,
Phenolic resin 5%~9%, amino resins 2%~3%, polyacrylate 6%~11%, acrylate based terpolymers latex 10%~
30%, sodium carboxymethylcellulose 1%~4%, polyimides 3%~17%, ethyl alcohol 2%~4%, N-Methyl pyrrolidone 6%~18%；Institute
The mass concentration for stating phosphoric acid is 10-30%；The amino resins is methyl-etherified melamine resin, ether melamine resin
One of；The polyacrylate is one of polymethyl methacrylate, fluorine-containing polymethacrylates；The propylene
Acid esters based terpolymers latex is Tri- n -butyltin methacrylate terpolymer latex, fluorine-containing methacrylate class ternary is total
One of copolymer latex.
2. a kind of preparation method of pole piece as described in claim 1, characterized by the following steps:
1) compound binding agent is added in solvent, is mixed to prepare glue；Electrode active material, conduction are added in glue
Agent is mixed to prepare electrode slurry；
2) it on a current collector by the coating of electrode slurry made from step 1), is drying to obtain；
Mixing in step 1) when glue liquid is under vacuum conditions, to stir 2-5h, the vacuum with the revolving speed of 500-1000rpm
The vacuum degree of condition is -0.01~-0.10Mpa, and the temperature when stirring is 25-70 DEG C；In step 1) when electrode slurry processed
Mixing be 2-6h to be stirred with the revolving speed of 2000-4000rpm, then 1-3h is stirred with the revolving speed of 500-1000rpm；The electrode slurry
The viscosity of material is 2000-6000mPas.
3. a kind of application of pole piece as described in claim 1 in terms of preparing lithium ion battery or supercapacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610277795.XA CN105788887B (en) | 2016-04-28 | 2016-04-28 | A kind of compound binding agent, using pole piece of compound binding agent preparation and preparation method thereof, application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610277795.XA CN105788887B (en) | 2016-04-28 | 2016-04-28 | A kind of compound binding agent, using pole piece of compound binding agent preparation and preparation method thereof, application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105788887A CN105788887A (en) | 2016-07-20 |
| CN105788887B true CN105788887B (en) | 2019-02-26 |
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| DE102016111981A1 (en) * | 2016-06-30 | 2018-01-04 | Volkswagen Ag | Process for the preparation of a supported catalyst material for a fuel cell |
| PL3588636T3 (en) * | 2017-02-24 | 2023-12-27 | Zeon Corporation | Binder composition for non-aqueous secondary batteries, slurry composition for non-aqueous secondary battery functional layers, functional layer for non-aqueous secondary batteries, and non-aqueous secondary battery |
| CN109755575A (en) * | 2017-11-03 | 2019-05-14 | 南京知博工业科技有限公司 | A kind of composition and preparation method thereof |
| CN111105937A (en) * | 2018-10-26 | 2020-05-05 | 中国科学院大连化学物理研究所 | Super capacitor or metal pre-embedded cathode and preparation method thereof |
| CN109524670A (en) * | 2018-11-12 | 2019-03-26 | 溧阳中科海钠科技有限责任公司 | A kind of anode of secondary battery slurry, anode pole piece and secondary cell |
| CN110760279A (en) * | 2019-10-22 | 2020-02-07 | 东莞市卓高电子科技有限公司 | High-cohesiveness water-based slurry for diaphragm and lithium ion battery diaphragm manufactured by using same |
| CN110797537B (en) * | 2019-11-06 | 2022-06-21 | 重庆工商大学 | Lithium-sulfur battery binder and preparation method and application thereof |
| CN113066982B (en) * | 2021-03-22 | 2022-06-14 | 远景动力技术(江苏)有限公司 | Modified water-based binder and preparation method and application thereof |
| CN115216245A (en) * | 2021-04-15 | 2022-10-21 | 恒大新能源技术(深圳)有限公司 | Binder, battery pole piece, preparation method of battery pole piece and secondary battery |
| CN113363485B (en) * | 2021-05-28 | 2022-05-13 | 万向一二三股份公司 | Negative electrode slurry of lithium battery and preparation method thereof |
| CN113372482A (en) * | 2021-08-16 | 2021-09-10 | 江苏卓高新材料科技有限公司 | Acrylic acid multipolymer, preparation method thereof and application thereof in positive pole piece |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562078A (en) * | 2009-05-15 | 2009-10-21 | 深圳清华大学研究院 | Super-capacitor and preparation method thereof |
| CN101923962A (en) * | 2010-03-23 | 2010-12-22 | 集盛星泰(北京)科技有限公司 | Active carbon electrode and super capacitor containing same |
| CN105406079A (en) * | 2015-12-17 | 2016-03-16 | 佛山市南海区欣源电子有限公司 | Lithium ion battery negative pole piece and preparation method thereof |
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| CN101980396A (en) * | 2010-09-08 | 2011-02-23 | 秦皇岛市芯驰光电科技有限公司 | Method for preparing lithium ion battery anode paste |
| CN103985837B (en) * | 2014-05-30 | 2016-06-15 | 合肥国轩高科动力能源有限公司 | The preparation technology of lithium ion battery electrode sizing agent |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562078A (en) * | 2009-05-15 | 2009-10-21 | 深圳清华大学研究院 | Super-capacitor and preparation method thereof |
| CN101923962A (en) * | 2010-03-23 | 2010-12-22 | 集盛星泰(北京)科技有限公司 | Active carbon electrode and super capacitor containing same |
| CN105406079A (en) * | 2015-12-17 | 2016-03-16 | 佛山市南海区欣源电子有限公司 | Lithium ion battery negative pole piece and preparation method thereof |
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