CN104538634A - Electrode binder and preparation method thereof - Google Patents
Electrode binder and preparation method thereof Download PDFInfo
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- CN104538634A CN104538634A CN201410753070.4A CN201410753070A CN104538634A CN 104538634 A CN104538634 A CN 104538634A CN 201410753070 A CN201410753070 A CN 201410753070A CN 104538634 A CN104538634 A CN 104538634A
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/32—Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F291/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00
- C08F291/12—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00 on to nitrogen-containing macromolecules
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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 an electrode binder and a preparation method thereof. The binder comprises the following components: 2-acrylamido-2-methyl propane sulfonic acid, active silica powder, liquid nitrile rubber, glass fibers, a coupling agent, an initiator, carboxymethylcellulose, barium stearate, methyl methacrylate, paraffin, epoxy acrylate and carbon powder. The preparation method comprises the steps of uniformly stirring and mixing 2-acrylamido-2-methyl propane sulfonic acid, liquid nitrile rubber, glass fibers, carboxymethylcellulose, methyl methacrylate, paraffin and epoxy acrylate in a mixing stirrer to obtain a mixture I; heating the mixture I in an inert gas atmosphere to have reaction to obtain a reactant I; adding the active silica powder, the coupling agent, the initiator, barium stearate and the carbon powder into the reactant I to be heated for reacting under a vacuum condition to obtain the electrode binder. The electrode binder provided by the invention is excellent in comprehensive performance and capable of being widely applied to the field of electrochemistry.
Description
Technical field
The invention belongs to electrochemical field, be specifically related to a kind of binders for electrodes and preparation method thereof.
Background technology
In the electrodes, binding agent is used to electrode active material adhesion macromolecular compound on a current collector.Its Main Function is bonding and keeps active material, intensifier electrode active material contacts with conductive agent and the electronics between active material with collector, stablize the structure of pole piece better, for the lithium ion battery plus-negative plate of the meeting of volume in charge and discharge process expansion/contraction, require that binding agent can play certain cushioning effect to this.Select a kind of suitable lithium ion battery binding agent, require that its Ohmic resistance is little, stable performance in the electrolytic solution, do not expand, not loose, not shedding.Generally speaking, the performance of binding agent, as cohesive force, pliability, alkali resistance, hydrophily etc., directly affects the performance of battery.Add the binding agent of optimised quantity, can obtain larger capacity, longer cycle life and lower internal resistance, in this cycle performance to raising battery, quick charge and discharge ability and reduction battery, pressure etc. have facilitation.Therefore select a kind of suitable binding agent extremely important.
The binders for electrodes used at present, its curing time is longer, generally reach more than 5 hours, shear strength is lower, alkaline resistance properties can reach 200 hours, in use, the discharge capacity of certain cycle-index has larger decline, therefore needs to research and develop the binders for electrodes that a kind of curing time is short, cohesive force is strong, electric property is excellent further simultaneously.
Summary of the invention
The object of the invention is to provide a kind of binders for electrodes and preparation method thereof to overcome above the deficiencies in the prior art, improving the shear strength of binding agent, reduce curing time, strengthen electric property, improve heat resistance.
The present invention adopts following technological means to realize:
A kind of binders for electrodes, comprises following component in components by weight percent: 2-acrylamide-2-methylpro panesulfonic acid 10-20 part, active micro silicon powder 2-8 part, LNBR 3-7 part, glass fiber 1-5 part, coupling agent 1-5 part, initator 1-5 part, carboxymethyl cellulose 4-8 part, barium stearate 2-6 part, methyl methacrylate 3-8 part, paraffin 1-4 part, epoxy acrylate 2-7 part, carbon dust 1-4 part.
Described binders for electrodes, preferably can comprise following component in components by weight percent: 2-acrylamide-2-methylpro panesulfonic acid 14-18 part, active micro silicon powder 4-7 part, LNBR 5-7 part, glass fiber 2-4 part, coupling agent 3-5 part, initator 1-3 part, carboxymethyl cellulose 5-7 part, barium stearate 4-5 part, methyl methacrylate 4-6 part, paraffin 2-4 part, epoxy acrylate 3-6 part, carbon dust 3-4 part.
Described binders for electrodes, coupling agent can be silane coupler.
Described binders for electrodes, initator can be ammonium persulfate.
The preparation method of the binders for electrodes described in more than one any one, comprises the following steps:
Step one, takes each component according to weight portion;
Step 2, joins 2-acrylamide-2-methylpro panesulfonic acid, LNBR, glass fiber, carboxymethyl cellulose, methyl methacrylate, paraffin and epoxy acrylate in mixing and blending machine and is uniformly mixed, obtain mixture one;
Step 3, proceeds in reactor by mixture one, in atmosphere of inert gases, is heated to 60-80 DEG C, stirs 40-60 minute, obtains reactant one;
Step 4, joins active micro silicon powder, coupling agent, initator, barium stearate and carbon dust in reactant one, under the condition of vacuum degree 0.02-0.06MPa, is heated to 100-120 DEG C, stirs 50-100 minute, is down to room temperature, obtains binders for electrodes.
The preparation method of described binders for electrodes, the mixing speed be uniformly mixed in step 2 can be 300-350 rev/min, and mixing time can be 20-30 minute.
The preparation method of described binders for electrodes, the speed stirred in step 3 can be 100-120 rev/min.
The preparation method of described binders for electrodes, the speed stirred in step 4 can be 70-80 rev/min.
Binders for electrodes provided by the invention has good performance, within wherein reaching 45min curing time, shear strength reaches more than 30MPa, the 500 power capacitance rates of descent that circulate reach within 1.2%, it is without exception that alkaline resistance properties reaches 500h, and it is without exception that heat resistance reaches 2000h.
Embodiment
Embodiment 1
A kind of binders for electrodes, comprises following component in components by weight percent: 2-acrylamide-2-methylpro panesulfonic acid 10 parts, active micro silicon powder 2 parts, LNBR 3 parts, 1 part, glass fiber, silane coupler 1 part, initiator ammonium persulfate 1 part, carboxymethyl cellulose 4 parts, barium stearate 2 parts, methyl methacrylate 3 parts, 1 part, paraffin, epoxy acrylate 2 parts, carbon dust 1 part.
The preparation method of above-described binders for electrodes, comprises the following steps:
Step one, takes each component according to weight portion;
Step 2,2-acrylamide-2-methylpro panesulfonic acid, LNBR, glass fiber, carboxymethyl cellulose, methyl methacrylate, paraffin and epoxy acrylate are joined in mixing and blending machine and is uniformly mixed, wherein mixing speed is 300 revs/min, mixing time is 20 minutes, obtains mixture one;
Step 3, proceeds in reactor by mixture one, is heated to 60 DEG C in atmosphere of inert gases, and stir 40 minutes, mixing speed is 100 revs/min, obtains reactant one;
Step 4, joins active micro silicon powder, silane coupler, initiator ammonium persulfate, barium stearate and carbon dust in reactant one, is heated to 100 DEG C under the condition of vacuum degree 0.02MPa, stir 50 minutes, mixing speed is 70 revs/min, is down to room temperature, obtains binders for electrodes.
Embodiment 2
A kind of binders for electrodes, comprises following component in components by weight percent: 2-acrylamide-2-methylpro panesulfonic acid 14 parts, active micro silicon powder 4 parts, LNBR 5 parts, 2 parts, glass fiber, silane coupler 3 parts, initiator ammonium persulfate 1 part, carboxymethyl cellulose 5 parts, barium stearate 4 parts, methyl methacrylate 4 parts, 2 parts, paraffin, epoxy acrylate 3 parts, carbon dust 3 parts.
The preparation method of above-described binders for electrodes, comprises the following steps:
Step one, takes each component according to weight portion;
Step 2,2-acrylamide-2-methylpro panesulfonic acid, LNBR, glass fiber, carboxymethyl cellulose, methyl methacrylate, paraffin and epoxy acrylate are joined in mixing and blending machine and is uniformly mixed, wherein mixing speed is 320 revs/min, mixing time is 24 minutes, obtains mixture one;
Step 3, proceeds in reactor by mixture one, is heated to 65 DEG C in atmosphere of inert gases, and stir 48 minutes, mixing speed is 105 revs/min, obtains reactant one;
Step 4, joins active micro silicon powder, silane coupler, initiator ammonium persulfate, barium stearate and carbon dust in reactant one, is heated to 108 DEG C under the condition of vacuum degree 0.03MPa, stir 60 minutes, mixing speed is 72 revs/min, is down to room temperature, obtains binders for electrodes.
Embodiment 3
A kind of binders for electrodes, comprises following component in components by weight percent: 2-acrylamide-2-methylpro panesulfonic acid 16 parts, active micro silicon powder 5 parts, LNBR 6 parts, 3 parts, glass fiber, silane coupler 4 parts, initiator ammonium persulfate 2 parts, carboxymethyl cellulose 6 parts, barium stearate 5 parts, methyl methacrylate 5 parts, 3 parts, paraffin, epoxy acrylate 5 parts, carbon dust 4 parts.
The preparation method of above-described binders for electrodes, comprises the following steps:
Step one, takes each component according to weight portion;
Step 2,2-acrylamide-2-methylpro panesulfonic acid, LNBR, glass fiber, carboxymethyl cellulose, methyl methacrylate, paraffin and epoxy acrylate are joined in mixing and blending machine and is uniformly mixed, wherein mixing speed is 330 revs/min, mixing time is 26 minutes, obtains mixture one;
Step 3, proceeds in reactor by mixture one, is heated to 70 DEG C in atmosphere of inert gases, and stir 50 minutes, mixing speed is 110 revs/min, obtains reactant one;
Step 4, joins active micro silicon powder, silane coupler, initiator ammonium persulfate, barium stearate and carbon dust in reactant one, is heated to 110 DEG C under the condition of vacuum degree 0.03MPa, stir 70 minutes, mixing speed is 76 revs/min, is down to room temperature, obtains binders for electrodes.
Embodiment 4
A kind of binders for electrodes, comprises following component in components by weight percent: 2-acrylamide-2-methylpro panesulfonic acid 18 parts, active micro silicon powder 7 parts, LNBR 7 parts, 4 parts, glass fiber, silane coupler 5 parts, initiator ammonium persulfate 3 parts, carboxymethyl cellulose 7 parts, barium stearate 5 parts, methyl methacrylate 6 parts, 4 parts, paraffin, epoxy acrylate 6 parts, carbon dust 4 parts.
The preparation method of above-described binders for electrodes, comprises the following steps:
Step one, takes each component according to weight portion;
Step 2,2-acrylamide-2-methylpro panesulfonic acid, LNBR, glass fiber, carboxymethyl cellulose, methyl methacrylate, paraffin and epoxy acrylate are joined in mixing and blending machine and is uniformly mixed, wherein mixing speed is 340 revs/min, mixing time is 30 minutes, obtains mixture one;
Step 3, proceeds in reactor by mixture one, is heated to 75 DEG C in atmosphere of inert gases, and stir 56 minutes, mixing speed is 115 revs/min, obtains reactant one;
Step 4, joins active micro silicon powder, silane coupler, initiator ammonium persulfate, barium stearate and carbon dust in reactant one, is heated to 118 DEG C under the condition of vacuum degree 0.04MPa, stir 80 minutes, mixing speed is 80 revs/min, is down to room temperature, obtains binders for electrodes.
Embodiment 5
A kind of binders for electrodes, comprises following component in components by weight percent: 2-acrylamide-2-methylpro panesulfonic acid 20 parts, active micro silicon powder 8 parts, LNBR 7 parts, 5 parts, glass fiber, silane coupler 5 parts, initiator ammonium persulfate 5 parts, carboxymethyl cellulose 8 parts, barium stearate 6 parts, methyl methacrylate 8 parts, 4 parts, paraffin, epoxy acrylate 7 parts, carbon dust 4 parts.
The preparation method of above-described binders for electrodes, comprises the following steps:
Step one, takes each component according to weight portion;
Step 2,2-acrylamide-2-methylpro panesulfonic acid, LNBR, glass fiber, carboxymethyl cellulose, methyl methacrylate, paraffin and epoxy acrylate are joined in mixing and blending machine and is uniformly mixed, wherein mixing speed is 350 revs/min, mixing time is 30 minutes, obtains mixture one;
Step 3, proceeds in reactor by mixture one, is heated to 80 DEG C in atmosphere of inert gases, and stir 60 minutes, mixing speed is 120 revs/min, obtains reactant one;
Step 4, joins active micro silicon powder, silane coupler, initiator ammonium persulfate, barium stearate and carbon dust in reactant one, is heated to 120 DEG C under the condition of vacuum degree 0.06MPa, stir 100 minutes, mixing speed is 80 revs/min, is down to room temperature, obtains binders for electrodes.
Reference examples
A kind of binders for electrodes, comprises following component in components by weight percent: 2-acrylamide-2-methylpro panesulfonic acid 16 parts, active micro silicon powder 5 parts, LNBR 6 parts, 3 parts, glass fiber, silane coupler 4 parts, initiator ammonium persulfate 2 parts, carboxymethyl cellulose 6 parts, barium stearate 5 parts, methyl methacrylate 5 parts, 3 parts, paraffin, epoxy acrylate 5 parts, carbon dust 4 parts.
The preparation method of above-described binders for electrodes, comprises the following steps:
Step one, takes each component according to weight portion;
Step 2,2-acrylamide-2-methylpro panesulfonic acid, LNBR, glass fiber, carboxymethyl cellulose, methyl methacrylate, paraffin and epoxy acrylate are joined in mixing and blending machine and is uniformly mixed, wherein mixing speed is 330 revs/min, mixing time is 26 minutes, obtains mixture one;
Step 3, mixture one is proceeded in reactor, add active micro silicon powder, silane coupler, initiator ammonium persulfate, barium stearate and carbon dust, 110 DEG C are heated under the condition of vacuum degree 0.03MPa, stir 70 minutes, mixing speed is 76 revs/min, is down to room temperature, obtains binders for electrodes.
Carry out performance test to the binders for electrodes that above embodiment prepares, result is as follows:
As can be seen from above result of the test, binders for electrodes provided by the invention has good performance, within wherein reaching 45min curing time, shear strength reaches more than 30MPa, the 500 power capacitance rates of descent that circulate reach within 1.2%, and it is without exception that alkaline resistance properties reaches 500h, and it is without exception that heat resistance reaches 2000h, simultaneously the binders for electrodes combination property for preparing of embodiment 3 is more outstanding, therefore can as most preferred embodiment.Reference examples is the further proving test carried out on the basis of embodiment 3, in preparation process, wherein do not carry out the preparation of the reactant one of step 3 in embodiment 3, and directly each component is carried out vacuum reaction, result causes the binding agent properties obtained all to obtain obvious decline, therefore can illustrate, the preparation first carrying out reactant one in preparation method is the committed step of the final products that can obtain excellent performance.
Claims (8)
1. a binders for electrodes, is characterized in that, comprises following component in components by weight percent: 2-acrylamide-2-methylpro panesulfonic acid 10-20 part, active micro silicon powder 2-8 part, LNBR 3-7 part, glass fiber 1-5 part, coupling agent 1-5 part, initator 1-5 part, carboxymethyl cellulose 4-8 part, barium stearate 2-6 part, methyl methacrylate 3-8 part, paraffin 1-4 part, epoxy acrylate 2-7 part, carbon dust 1-4 part.
2. binders for electrodes according to claim 1, is characterized in that, comprises following component in components by weight percent: 2-acrylamide-2-methylpro panesulfonic acid 14-18 part, active micro silicon powder 4-7 part, LNBR 5-7 part, glass fiber 2-4 part, coupling agent 3-5 part, initator 1-3 part, carboxymethyl cellulose 5-7 part, barium stearate 4-5 part, methyl methacrylate 4-6 part, paraffin 2-4 part, epoxy acrylate 3-6 part, carbon dust 3-4 part.
3. binders for electrodes according to claim 1, is characterized in that, coupling agent is silane coupler.
4. binders for electrodes according to claim 1, is characterized in that, initator is ammonium persulfate.
5. the preparation method of the binders for electrodes described in any one of claim 1-4, is characterized in that, comprises the following steps:
Step one, takes each component according to weight portion;
Step 2, joins 2-acrylamide-2-methylpro panesulfonic acid, LNBR, glass fiber, carboxymethyl cellulose, methyl methacrylate, paraffin and epoxy acrylate in mixing and blending machine and is uniformly mixed, obtain mixture one;
Step 3, proceeds in reactor by mixture one, in atmosphere of inert gases, is heated to 60-80 DEG C, stirs 40-60 minute, obtains reactant one;
Step 4, joins active micro silicon powder, coupling agent, initator, barium stearate and carbon dust in reactant one, under the condition of vacuum degree 0.02-0.06MPa, is heated to 100-120 DEG C, stirs 50-100 minute, is down to room temperature, obtains binders for electrodes.
6. the preparation method of binders for electrodes according to claim 5, is characterized in that, the mixing speed be uniformly mixed in step 2 is 300-350 rev/min, and mixing time is 20-30 minute.
7. the preparation method of binders for electrodes according to claim 5, is characterized in that, the speed stirred in step 3 is 100-120 rev/min.
8. the preparation method of binders for electrodes according to claim 5, is characterized in that, the speed stirred in step 4 is 70-80 rev/min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108574102A (en) * | 2017-02-28 | 2018-09-25 | 荒川化学工业株式会社 | For the binder aqueous solution of lithium ion battery, slurry, electrode, diaphragm, diaphragm/electrode laminate and lithium ion battery |
| CN111234319A (en) * | 2020-01-17 | 2020-06-05 | 遵义市聚源建材有限公司 | High-density polymer regulator and preparation method thereof |
| CN112980351A (en) * | 2021-02-26 | 2021-06-18 | 上海日御新材料科技有限公司 | Binder for back electrode silver paste and preparation method thereof |
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| CN103351448A (en) * | 2013-06-28 | 2013-10-16 | 中国科学院青岛生物能源与过程研究所 | High-temperature resistance lithium ion secondary battery adhesive and preparation method thereof |
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| CN101210158A (en) * | 2006-12-26 | 2008-07-02 | 中南大学 | Electric bonding for battery or capacitor and composition containing the same used for electrode |
| CN101359737A (en) * | 2007-07-31 | 2009-02-04 | 比亚迪股份有限公司 | Water repelling adhesive, zincium cathode alkaline secondary cell using the water repelling adhesive |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108574102A (en) * | 2017-02-28 | 2018-09-25 | 荒川化学工业株式会社 | For the binder aqueous solution of lithium ion battery, slurry, electrode, diaphragm, diaphragm/electrode laminate and lithium ion battery |
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| CN111234319A (en) * | 2020-01-17 | 2020-06-05 | 遵义市聚源建材有限公司 | High-density polymer regulator and preparation method thereof |
| CN111234319B (en) * | 2020-01-17 | 2021-06-01 | 遵义市聚源建材有限公司 | High-density polymer regulator and preparation method thereof |
| CN112980351A (en) * | 2021-02-26 | 2021-06-18 | 上海日御新材料科技有限公司 | Binder for back electrode silver paste and preparation method thereof |
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| CN104538634B (en) | 2017-04-12 |
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Denomination of invention: An electrode binder and its preparation method Effective date of registration: 20200819 Granted publication date: 20170412 Pledgee: Jiangsu Credit Financing Guarantee Co.,Ltd. Pledgor: NANTONG RUIDA ELECTRONIC MATERIAL Co.,Ltd. Registration number: Y2020980005147 |
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