CN105810948A - Adhesive for lithium ion batteries and preparation method of adhesive for lithium ion batteries - Google Patents
Adhesive for lithium ion batteries and preparation method of adhesive for lithium ion batteries Download PDFInfo
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- CN105810948A CN105810948A CN201610357753.7A CN201610357753A CN105810948A CN 105810948 A CN105810948 A CN 105810948A CN 201610357753 A CN201610357753 A CN 201610357753A CN 105810948 A CN105810948 A CN 105810948A
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- China
- Prior art keywords
- lithium ion
- binding agent
- ion battery
- parts
- preparation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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 adhesive for lithium ion batteries and a preparation method of the adhesive for the lithium ion batteries. The adhesive is prepared from 2-cyanoacrylates, cyanoethyl ethylenediamine, citric acid, polyethyleneimine, a modified polyacrylate mixture, a coupling agent and an initiator. The preparation method includes: adding the 2-cyanoacrylates, the cyanoethyl ethylenediamine, the citric acid, the polyethyleneimine and the modified polyacrylate mixture into a reaction kettle, well mixing, heating to 60-70 DEG C, adding the coupling agent and the initiator, heating to 80-85 DEG C under inert gas protection, reacting for 40-60min, and cooling to the room temperature to obtain the adhesive. The adhesive for the lithium ion batteries is excellent in usability and further meets utilization requirements.
Description
Technical field
The invention belongs to field of lithium ion battery, be specifically related to a kind of lithium ion battery binding agent and preparation method thereof.
Background technology
Lithium ion battery be at present research the most extensively, one of the most deep energy storing device, because it has high capacity density, cycle life height, environmental protection, use temperature range width and security performance advantages of higher, it is widely used the fields such as smart mobile phone, panel computer, electric automobile.And the electrode slice performance of lithium ion battery is one of key factor determining performance of lithium ion battery, it is mainly made up of electrode active material, conductive agent, binding agent and metal collector (Copper Foil or aluminium foil etc.)；Wherein binding agent is used for bond electrode active material and conductive agent granule, bonds them on metal collector surface simultaneously.Therefore the quality of binding agent mechanical property and the cycle life of battery are closely related, if mechanical property is the best, easily causes electrode slice efflorescence in electrochemistry cyclic process, cause electrode material to come off from collection liquid surface, lose electrochemical energy storage performance.Additionally, when the electrochemical stability of binding agent is bad, during electrode electro Chemical, some functional groups of binding agent can occur irreversible chemical reaction with lithium ion, thus causes the reversible capacity of battery to decline.
The binding agent that lithium ion battery is the most frequently used at present mainly has Kynoar (PVDF), sodium carboxymethyl cellulose (CMC) and butadiene-styrene rubber (SBR) etc..PVDF binding agent is a kind of binding agent more ripe in Technology, there is preferable adhesive property, but use this binding agent to prepare electrode slice and need to consume N-Methyl pyrrolidone (NMP) organic solvent of substantial amounts of higher, cost is high, environmental pollution is big, and PVDF binding agent is the most swelling in some conventional electrolyte, causes electrode stability to decline.CMC and SBR binding agent is generally mated use, and this kind of binding agent Chang Yishui is solvent, low cost, environmental friendliness, is widely used, but such binding agent mechanical property is bad, and electric conductivity is poor.Especially, having the high-capacity electrode material (such as silicon, tin ash negative pole etc.) of notable change in volume for some during charge and discharge cycles, these conventional binding agents cannot meet and are actually needed.
Summary of the invention
It is an object of the invention to provide a kind of lithium ion battery binding agent and preparation method thereof to overcome above the deficiencies in the prior art, promote mechanical performance and the electric property of binding agent.
Technical scheme is as follows:
A kind of lithium ion battery binding agent, component includes in parts by weight: 2-cyanacrylate 5-10 part, cyanoethyl ethylenediamine 2-6 part, citric acid 1-3 part, polymine 1-3 part, modified polyacrylate mixture 15-20 part, coupling agent 1-3 part, initiator 0.5-1 part.
Described lithium ion battery binding agent, the preparation method of described modified polyacrylate mixture is by polyacrylate 20-30 part in parts by weight, polyvinyl alcohol 2-10 part, dimethyl diallyl ammonium chloride 3-5 part join reactor is carried out mixing, melting temperature 80-100 DEG C, mixing time 10-20 minute, obtains modified polyacrylate mixture.
Described lithium ion battery binding agent, described coupling agent is titanate coupling agent.
Described lithium ion battery binding agent, described initiator is Ammonium persulfate..
A kind of preparation method of described lithium ion battery binding agent, step is as follows:
Step one, weighs each component according to weight portion；
Step 2; by 2-cyanacrylate, cyanoethyl ethylenediamine, citric acid; polymine and modified polyacrylate mixture join in reactor; it is uniformly mixed, is warming up to 60-70 DEG C, add coupling agent and initiator; 80-85 DEG C it is warming up under conditions of inert gas shielding; react 40-60 minute, be down to room temperature, obtain lithium ion battery binding agent.
The preparation method of described lithium ion battery binding agent, in step 2, noble gas is nitrogen or argon.
The lithium ion battery binding agent that the present invention provides has good application performance, and wherein pole piece peel strength has reached 19.2N/mm2Above, good toughness, after 500 circulations of battery, capability retention has reached more than 97.6%, is significantly better than state of the art.
Detailed description of the invention:
Embodiment 1
A kind of lithium ion battery binding agent, component includes in parts by weight: 2-cyanacrylate 5 parts, cyanoethyl ethylenediamine 2 parts, citric acid 1 part, polymine 1 part, 15 parts of modified polyacrylate mixture, titanate coupling agent 1 part, ammonium persulfate initiator 0.5 part.
In above component, the preparation method of modified polyacrylate mixture is as follows:
By polyacrylate 20 parts in parts by weight, polyvinyl alcohol 2 parts, dimethyl diallyl ammonium chloride 3 parts join reactor is carried out mixing, melting temperature 80 DEG C, mixing time 10 minutes, obtain modified polyacrylate mixture.
The preparation method of above lithium ion battery binding agent, step is as follows:
Step one, weighs each component according to weight portion；
Step 2; by 2-cyanacrylate, cyanoethyl ethylenediamine, citric acid; polymine and modified polyacrylate mixture join in reactor; it is uniformly mixed, is warming up to 60 DEG C, add titanate coupling agent and Ammonium persulfate.; it is warming up to 80 DEG C under conditions of nitrogen is protected; react 40 minutes, be down to room temperature, obtain lithium ion battery binding agent.
Embodiment 2
A kind of lithium ion battery binding agent, component includes in parts by weight: 2-cyanacrylate 6 parts, cyanoethyl ethylenediamine 4 parts, citric acid 2 parts, polymine 1 part, 17 parts of modified polyacrylate mixture, titanate coupling agent 2 parts, ammonium persulfate initiator 0.6 part.
In above component, the preparation method of modified polyacrylate mixture is as follows:
By polyacrylate 23 parts in parts by weight, polyvinyl alcohol 4 parts, dimethyl diallyl ammonium chloride 4 parts join reactor is carried out mixing, melting temperature 85 DEG C, mixing time 15 minutes, obtain modified polyacrylate mixture.
The preparation method of above lithium ion battery binding agent, step is as follows:
Step one, weighs each component according to weight portion；
Step 2; by 2-cyanacrylate, cyanoethyl ethylenediamine, citric acid; polymine and modified polyacrylate mixture join in reactor; it is uniformly mixed, is warming up to 63 DEG C, add titanate coupling agent and Ammonium persulfate.; 82 DEG C it are warming up under conditions of argon shield; react 48 minutes, be down to room temperature, obtain lithium ion battery binding agent.
Embodiment 3
A kind of lithium ion battery binding agent, component includes in parts by weight: 2-cyanacrylate 8 parts, cyanoethyl ethylenediamine 5 parts, citric acid 2 parts, polymine 2 parts, 17 parts of modified polyacrylate mixture, titanate coupling agent 3 parts, ammonium persulfate initiator 0.7 part.
In above component, the preparation method of modified polyacrylate mixture is as follows:
By polyacrylate 28 parts in parts by weight, polyvinyl alcohol 7 parts, dimethyl diallyl ammonium chloride 4 parts join reactor is carried out mixing, melting temperature 90 DEG C, mixing time 16 minutes, obtain modified polyacrylate mixture.
The preparation method of above lithium ion battery binding agent, step is as follows:
Step one, weighs each component according to weight portion；
Step 2; by 2-cyanacrylate, cyanoethyl ethylenediamine, citric acid; polymine and modified polyacrylate mixture join in reactor; it is uniformly mixed, is warming up to 65 DEG C, add titanate coupling agent and Ammonium persulfate.; it is warming up to 84 DEG C under conditions of nitrogen is protected; react 50 minutes, be down to room temperature, obtain lithium ion battery binding agent.
Embodiment 4
A kind of lithium ion battery binding agent, component includes in parts by weight: 2-cyanacrylate 10 parts, cyanoethyl ethylenediamine 5 parts, citric acid 3 parts, polymine 3 parts, 17 parts of modified polyacrylate mixture, titanate coupling agent 2 parts, ammonium persulfate initiator 0.8 part.
In above component, the preparation method of modified polyacrylate mixture is as follows:
By polyacrylate 30 parts in parts by weight, polyvinyl alcohol 10 parts, dimethyl diallyl ammonium chloride 4 parts join reactor is carried out mixing, melting temperature 95 DEG C, mixing time 18 minutes, obtain modified polyacrylate mixture.
The preparation method of above lithium ion battery binding agent, step is as follows:
Step one, weighs each component according to weight portion；
Step 2; by 2-cyanacrylate, cyanoethyl ethylenediamine, citric acid; polymine and modified polyacrylate mixture join in reactor; it is uniformly mixed, is warming up to 70 DEG C, add titanate coupling agent and Ammonium persulfate.; it is warming up to 85 DEG C under conditions of nitrogen is protected; react 55 minutes, be down to room temperature, obtain lithium ion battery binding agent.
Embodiment 5
A kind of lithium ion battery binding agent, component includes in parts by weight: 2-cyanacrylate 10 parts, cyanoethyl ethylenediamine 6 parts, citric acid 3 parts, polymine 3 parts, 20 parts of modified polyacrylate mixture, titanate coupling agent 3 parts, ammonium persulfate initiator 1 part.
In above component, the preparation method of modified polyacrylate mixture is as follows:
By polyacrylate 30 parts in parts by weight, polyvinyl alcohol 10 parts, dimethyl diallyl ammonium chloride 5 parts join reactor is carried out mixing, melting temperature 100 DEG C, mixing time 20 minutes, obtain modified polyacrylate mixture.
The preparation method of above lithium ion battery binding agent, step is as follows:
Step one, weighs each component according to weight portion；
Step 2; by 2-cyanacrylate, cyanoethyl ethylenediamine, citric acid; polymine and modified polyacrylate mixture join in reactor; it is uniformly mixed, is warming up to 70 DEG C, add titanate coupling agent and Ammonium persulfate.; it is warming up to 85 DEG C under conditions of nitrogen is protected; react 60 minutes, be down to room temperature, obtain lithium ion battery binding agent.
Reference examples
A kind of lithium ion battery binding agent, component includes in parts by weight: 2-cyanacrylate 10 parts, cyanoethyl ethylenediamine 5 parts, citric acid 3 parts, polymine 3 parts, polyacrylate 17 parts, titanate coupling agent 2 parts, ammonium persulfate initiator 0.8 part.
The preparation method of above lithium ion battery binding agent, step is as follows:
Step one, weighs each component according to weight portion；
Step 2; by 2-cyanacrylate, cyanoethyl ethylenediamine, citric acid; polymine and polyacrylate join in reactor; it is uniformly mixed, is warming up to 70 DEG C, add titanate coupling agent and Ammonium persulfate.; it is warming up to 85 DEG C under conditions of nitrogen is protected; react 55 minutes, be down to room temperature, obtain lithium ion battery binding agent.
The lithium ion battery binding agent preparing above example carries out performance test, is applied in the electrode slice of lithium ion battery, tests binding agent further and applies the battery performance of binding agent, and result is as follows:
As can be seen from the above results, the lithium ion battery binding agent that the present invention provides has good application performance, and wherein pole piece peel strength has reached 19.2N/mm2Above, good toughness, after 500 circulations of battery, capability retention has reached more than 97.6%.And reference examples is directly to use polyacrylate not to be modified preparing modified mixture to it on the basis of embodiment 4, result shows that final products performance is decreased significantly, and proves technical advance and the superiority effect of the lithium ion battery binding agent of present invention offer the most further.
Claims (6)
1. a lithium ion battery binding agent, it is characterised in that component includes in parts by weight: 2-cyanacrylate 5-10 part, cyanoethyl ethylenediamine 2-6 part, citric acid 1-3 part, polymine 1-3 part, modified polyacrylate mixture 15-20 part, coupling agent 1-3 part, initiator 0.5-1 part.
Lithium ion battery binding agent the most according to claim 1, it is characterized in that, the preparation method of described modified polyacrylate mixture is by polyacrylate 20-30 part in parts by weight, polyvinyl alcohol 2-10 part, dimethyl diallyl ammonium chloride 3-5 part join reactor is carried out mixing, melting temperature 80-100 DEG C, mixing time 10-20 minute, obtain modified polyacrylate mixture.
Lithium ion battery binding agent the most according to claim 1, it is characterised in that described coupling agent is titanate coupling agent.
Lithium ion battery binding agent the most according to claim 1, it is characterised in that described initiator is Ammonium persulfate..
5. the preparation method of the lithium ion battery binding agent described in a claim 1, it is characterised in that step is as follows:
Step one, weighs each component according to weight portion；
Step 2; by 2-cyanacrylate, cyanoethyl ethylenediamine, citric acid; polymine and modified polyacrylate mixture join in reactor; it is uniformly mixed, is warming up to 60-70 DEG C, add coupling agent and initiator; 80-85 DEG C it is warming up under conditions of inert gas shielding; react 40-60 minute, be down to room temperature, obtain lithium ion battery binding agent.
The preparation method of lithium ion battery binding agent the most according to claim 5, it is characterised in that in step 2, noble gas is nitrogen or argon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610357753.7A CN105810948B (en) | 2016-05-26 | 2016-05-26 | A kind of lithium ion battery adhesive and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610357753.7A CN105810948B (en) | 2016-05-26 | 2016-05-26 | A kind of lithium ion battery adhesive and preparation method thereof |
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| Publication Number | Publication Date |
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| CN105810948A true CN105810948A (en) | 2016-07-27 |
| CN105810948B CN105810948B (en) | 2018-08-10 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1400682A (en) * | 2001-07-28 | 2003-03-05 | 潘杰民 | Lithium ion polymer cell |
| CN104871352A (en) * | 2013-01-29 | 2015-08-26 | 大曹株式会社 | Binder for battery electrode, and electrode and battery using same |
| CN105122521A (en) * | 2013-05-14 | 2015-12-02 | 日本瑞翁株式会社 | Binder composition for lithium ion secondary battery, slurry composition for lithium ion secondary battery, electrode for lithium ion secondary battery, lithium ion secondary battery, and method for producing binder composition for lithium ion secondary battery |
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2016
- 2016-05-26 CN CN201610357753.7A patent/CN105810948B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1400682A (en) * | 2001-07-28 | 2003-03-05 | 潘杰民 | Lithium ion polymer cell |
| CN104871352A (en) * | 2013-01-29 | 2015-08-26 | 大曹株式会社 | Binder for battery electrode, and electrode and battery using same |
| CN105122521A (en) * | 2013-05-14 | 2015-12-02 | 日本瑞翁株式会社 | Binder composition for lithium ion secondary battery, slurry composition for lithium ion secondary battery, electrode for lithium ion secondary battery, lithium ion secondary battery, and method for producing binder composition for lithium ion secondary battery |
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| CN105810948B (en) | 2018-08-10 |
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