CN109742402A - A kind of preparation method of enhancement type polyvinylidene difluoroethylene lithium battery conductive adhesive - Google Patents
A kind of preparation method of enhancement type polyvinylidene difluoroethylene lithium battery conductive adhesive Download PDFInfo
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- CN109742402A CN109742402A CN201910016180.5A CN201910016180A CN109742402A CN 109742402 A CN109742402 A CN 109742402A CN 201910016180 A CN201910016180 A CN 201910016180A CN 109742402 A CN109742402 A CN 109742402A
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- binder
- enhancement type
- difluoroethylene
- conductive adhesive
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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 preparation method of enhancement type polyvinylidene difluoroethylene lithium battery conductive adhesive.Polyvinylidene fluoride, N-Methyl pyrrolidone, silane coupled agent composition in the ratio of material quality part proportion 5:40~50:1~4, are added to and are set in a round bottom flask, enhanced PVDF binder is made in 1~3h of magnetic agitation after mixing by this method.Enhanced PVDF binder obtained is mixed in positive electrode active materials, conductive carbon and is added in ball grinder, uniform sizing material is made.Uniform sizing material obtained is coated in the adhesion strength that polyvinylidene fluoride binder can be improved in aluminum foil current collector.Present invention process is simple, easy to operate, and modified significant effect.Modified binder prepared by the present invention can be applicable in the preparation of based lithium-ion battery positive plate.
Description
Technical field
The present invention relates to the modified fields of lithium ion battery conductive adhesive, and in particular to a kind of using silane coupler modified
Enhancement type polyvinylidene difluoroethylene lithium battery conductive adhesive preparation method.Modified binder prepared by the present invention can be applied
In the preparation of based lithium-ion battery positive plate.
Background technique
It is solution since lithium ion battery has many advantages, such as that voltage is high, have a safety feature, environmental pollution is small, memory-less effect
The certainly important technical of environmental pollution and energy crisis.Lithium ion battery is mainly by portions such as anode, cathode, diaphragm, electrolyte
Part composition.Binder is the important auxiliary material for preparing battery positive and negative electrode, has important shadow to the overall performance of lithium ion battery
It rings.In preparing anode process, active material is uniformly dispersed in slurry prepared by binder, is then bonded to plus plate current-collecting body
On.
Kynoar has many advantages, such as that stable electrochemical property, dielectric constant are high, caking property is good, cheap, is lithium
The widely used binder of anode of ion battery.But, polyvinylidene fluoride resin binder is easy be electrolysed in positive system
Occur Swelling in liquid, split away off active material from plus plate current-collecting body, cause the discharge capacity of lithium ion battery with
Charge-discharge cycle is declined rapidly, and causes great security risk in battery system, and application field is restricted.In addition, by
It is higher in the crystallinity of Kynoar itself, it will increase the internal resistance of cell in battery system, influence the hair of cell discharge performance
It waves, therefore Kynoar is modified very necessary.
Silane coupling agent and can have and can react with organic substance with the hydrolyzable groups in conjunction with inorganic substances since its is existing
Organo-functional group, two kinds of biggish material interfaces of nature difference can be made to be coupled, to improve the performance and enhancing of material
Adhesion strength, to have the function that modified material performance.Silane coupling agent is widely used in as interface modifier
The fields such as rubber, plastics, adhesive, sealant, coating, glass, ceramics, anti-corrosion of metal.
Summary of the invention
In order to solve the problems, such as it is above-mentioned exist, the present invention provide it is a kind of using silane coupling agent improve lithium ion battery enhancing
The preparation method of type polyvinylidene fluoride (PVDF) lithium battery conductive adhesive.The present invention handles lithium ion using silane coupling agent
The adhesive property of polyvinylidene fluoride had both can be improved with polyvinylidene fluoride (PVDF) in battery, enhanced interface stability, and energy
The chemical property of lithium ion battery is improved, lithium ion cycle life is improved.In addition, the type of silane coupling agent is more, price is low
Honest and clean, modified at low cost and technique for applying is easy.The enhanced PVDF binder that the present invention is prepared by method of modifying has operation
The features such as simplicity, adhesion strength is big, at low cost.
Technical scheme is as follows:
1) material quality part matches:
| Polyvinylidene fluoride | 5 parts |
| N-Methyl pyrrolidone | 40~50 parts |
| Silane coupled agent composition | 1~4 part |
2) preparation method:
Silane coupled agent composition, polyvinylidene fluoride, N-Methyl pyrrolidone (NMP) are added to according to weight ratio and set
In a round bottom flask, enhanced PVDF binder is made in 1~3h of magnetic agitation after mixing；
3) it applies
Ball milling is added in enhanced PVDF binder made from above-mentioned steps, lithium ion battery positive electrode active materials, conductive carbon
In tank, and suitable grinding aid is added dropwise and carries out 1~3h of ball milling, uniform sizing material is made.Uniform sizing material obtained is coated in aluminium foil
On collector, peel strength is surveyed after dry.Test sample peel strength is referring to " 180 ° of GB/T2790-1995 adhesive removings
Strength Testing Methods flexible material is to rigid material " in sample preparation require to carry out sample preparation test.Think that modified general PVDF is viscous
Knot agent is compared with enhanced PVDF binder prepared by the present invention, and enhanced PVDF binder is stronger than general PVDF binder bonding
Degree improves 15 times.
The silane coupled agent composition refer to KH550, KH560 in silanes coupling agent, KH570, KH590,
The mixture of two or more any mass ratio in KH792.
Preferably, what above-mentioned silane coupling agent accounted for anode sizing agent mixture is (1- with the amount ratio of polyvinylidene fluoride
4):5。
The invention has the following beneficial effects:
It being significantly improved by the adhesive property of silane coupler modified Kynoar binder, peel strength significantly improves,
So that the stability of lithium ion battery improves.Key innovations of the invention are that modified technique is simple, efficient.
Detailed description of the invention
Fig. 1 is the knot that the batten for implementing to prepare and comparative example use puller system Kynoar binder peel strength test
Fruit.
Specific embodiment
It is next combined with specific embodiments below that the present invention will be described in detail.
Embodiment 1
The preparation of enhanced binder: silane coupled agent composition, PVDF, NMP are placed in round bottom according to the mass ratio of 1:5:50
In flask, magnetic agitation 1h is to get silane coupler modified enhancement type polyvinylidene difluoroethylene binder.Wherein KH550,
The mass ratio of KH570 is 0.28:0.72.
The preparation of positive uniform sizing material: by positive active material commodity ternary material NCM523, conductive carbon, enhancement type polyvinylidene
Difluoroethylene binder, NMP are mixed according to the mass ratio of 17:2:10:80, are carried out ball milling 1.5h mixing, are obtained anode sizing agent.
Test bars preparation: anode sizing agent being coated on the aluminium foil of thickness 15um, dry, referring to " GB/T2790-1995
180 ° of peeling strength test method flexible materials of adhesive are to rigid material " in sample preparation require carry out sample preparation test, result is such as
Batten 1 in Fig. 1.
Embodiment 2
The preparation of enhanced binder: silane coupled agent composition: PVDF:NMP is placed in round bottom according to the mass ratio of 2:5:40
In flask, magnetic agitation 3h is to get silane coupler modified enhancement type polyvinylidene difluoroethylene binder.Wherein KH560,
The mass ratio of KH550, KH570 are 0.4:0.2:0.4.
The preparation of positive uniform sizing material: by positive active material commodity ternary material NCM523, conductive carbon, enhancement type polyvinylidene
Difluoroethylene binder, NMP are mixed according to the mass ratio of 17:2:10:80, are carried out ball milling 3h mixing, are obtained anode sizing agent.
Test bars preparation: anode sizing agent being coated on the aluminium foil of thickness 15um, dry, referring to " GB/T2790-1995
180 ° of peeling strength test method flexible materials of adhesive are to rigid material " in sample preparation require carry out sample preparation test, result is such as
Batten 2 in Fig. 1.
Embodiment 3
The preparation of enhanced binder: silane coupled agent composition: PVDF:NMP is placed in round bottom according to the mass ratio of 2:5:50
In flask, magnetic agitation 2h is to get silane coupler modified enhancement type polyvinylidene difluoroethylene binder.Wherein silane coupling agent
Mixture is mixed in mass ratio for 0.35:0.25:0.1:0.3 by KH560, KH550, KH570, KH792.
The preparation of positive uniform sizing material: by positive active material commodity ternary material NCM523, conductive carbon, enhancement type polyvinylidene
Difluoroethylene binder, NMP are mixed according to the mass ratio of 17:2:10:80, are carried out ball milling 2h mixing, are obtained anode sizing agent.
Test bars preparation: anode sizing agent being coated on the aluminium foil of thickness 15um, dry, referring to " GB/T2790-1995
180 ° of peeling strength test method flexible materials of adhesive are to rigid material " in sample preparation require carry out sample preparation test, result is such as
Batten 3 in Fig. 1.
Embodiment 4
The preparation of enhanced binder: silane coupled agent composition: PVDF:NMP is placed in round bottom according to the mass ratio of 4:5:40
In flask, magnetic agitation 1.5h is to get silane coupler modified enhancement type polyvinylidene difluoroethylene binder.
Wherein silane coupled agent composition is 0.2 by KH560, KH550, KH570, KH792, KH590 in mass ratio:
0.25:0.1:0.3:0.15 is mixed.
The preparation of positive uniform sizing material: by positive active material commodity ternary material NCM523, conductive carbon, enhancement type polyvinylidene
Difluoroethylene binder, NMP are mixed according to the mass ratio of 17:2:10:80, are carried out ball milling 2h mixing, are obtained anode sizing agent.
Test bars preparation: anode sizing agent being coated on the aluminium foil of thickness 15um, dry, referring to " GB/T2790-1995
180 ° of peeling strength test method flexible materials of adhesive are to rigid material " in sample preparation require carry out sample preparation test, result is such as
Batten 4 in Fig. 1.
Embodiment 5
The preparation of enhanced binder: silane coupled agent composition: PVDF:NMP is placed in round bottom according to the mass ratio of 4:5:50
In flask, magnetic agitation 2.5h is to get silane coupler modified enhancement type polyvinylidene difluoroethylene binder.It is wherein silane coupled
Agent composition is 0.65:0.05:0.05:0.1:0.15 mixing by KH560, KH550, KH570, KH792, KH590 in mass ratio
It forms.
The preparation of positive uniform sizing material: positive active material commodity ternary material NCM523, conductive carbon, KH792 is modified
Polyvinylidene fluoride binder, NMP are mixed according to the mass ratio of 17:2:10:80, are carried out ball milling 2h mixing, are obtained anode sizing agent.
Test bars preparation: anode sizing agent being coated on the aluminium foil of thickness 15um, dry, referring to " GB/T2790-1995
180 ° of peeling strength test method flexible materials of adhesive are to rigid material " in sample preparation require carry out sample preparation test, result is such as
Batten 5 in Fig. 1.
Embodiment 6
The preparation of enhanced binder: silane coupled agent composition: PVDF:NMP is placed in round bottom according to the mass ratio of 2:5:50
In flask, magnetic agitation mixes 3.5h to get silane coupler modified enhancement type polyvinylidene difluoroethylene binder.
Wherein silane coupled agent composition is mixed in mass ratio for 0.65:0.05:0.2:0.1 by KH560, KH550, KH570
It closes.
The preparation of positive uniform sizing material: by positive active material commodity ternary material NCM523, conductive carbon, enhancement type polyvinylidene
Difluoroethylene binder, NMP are mixed according to the mass ratio of 17:2:10:80, are carried out ball milling 2h mixing, are obtained anode sizing agent.
Test bars preparation: anode sizing agent being coated on the aluminium foil of thickness 15um, dry, referring to " GB/T2790-1995
180 ° of peeling strength test method flexible materials of adhesive are to rigid material " in sample preparation require carry out sample preparation test, result is such as
Batten 6 in Fig. 1.
Embodiment 7
The preparation of enhanced binder: silane coupled agent composition: PVDF:NMP is placed in round bottom according to the mass ratio of 3:5:40
In flask, magnetic agitation 3h is to get silane coupler modified enhancement type polyvinylidene difluoroethylene binder.
Wherein silane coupled agent composition is mixed in mass ratio for 0.65:0.35 by KH560, KH570.
The preparation of positive uniform sizing material: by positive active material commodity ternary material NCM523, conductive carbon, enhancement type polyvinylidene
Difluoroethylene binder, NMP are mixed according to the mass ratio of 17:2:10:80, are carried out ball milling 2h mixing, are obtained anode sizing agent.
Test bars preparation: anode sizing agent being coated on the aluminium foil of thickness 15um, dry, referring to " GB/T2790-1995
180 ° of peeling strength test method flexible materials of adhesive are to rigid material " in sample preparation require carry out sample preparation test, result is such as
Batten 7 in Fig. 1.
Embodiment 8
The preparation of enhanced binder: silane coupled agent composition: PVDF:NMP is placed in round bottom according to the mass ratio of 3:5:50
In flask, magnetic agitation 2h is to get silane coupler modified enhancement type polyvinylidene difluoroethylene binder.
Wherein silane coupled agent composition by KH560, KH792, KH570 be in mass ratio 0.45:0.2:0.35 mixing and
At.
The preparation of positive uniform sizing material: by positive active material commodity ternary material NCM523, conductive carbon, enhanced modification
Polyvinylidene fluoride binder, NMP are mixed according to the mass ratio of 17:2:10:80, are carried out ball milling 2h mixing, are obtained anode sizing agent.
Test bars preparation: anode sizing agent being coated on the aluminium foil of thickness 15um, dry, referring to " GB/T2790-1995
180 ° of peeling strength test method flexible materials of adhesive are to rigid material " in sample preparation require carry out sample preparation test, result is such as
Batten 8 in Fig. 1.
Comparative example:
The preparation of comparative binders: PVDF:NMP is set in a round bottom flask according to the mass ratio of 1:10, magnetic agitation is uniformly
Obtain polyvinylidene fluoride binder.
The preparation of positive uniform sizing material: by positive active material commodity ternary material NCM523, conductive carbon, gather inclined difluoro second
Alkene binder, NMP are mixed according to the mass ratio of 17:2:10:80, are carried out ball milling 2h mixing, are obtained anode sizing agent.
Test bars preparation: anode sizing agent is coated on the aluminium foil of 15um, dry, referring to " GB/T2790-1995 gluing
180 ° of peeling strength test method flexible materials of agent are to rigid material " in sample preparation require carry out sample preparation test, result is as shown in figure 1
Comparative example batten.
Claims (3)
1. a kind of preparation method of enhancement type polyvinylidene difluoroethylene lithium battery conductive adhesive, which is characterized in that including following step
It is rapid:
1) material quality part matches
2) preparation method
Silane coupled agent composition, polyvinylidene fluoride, N-Methyl pyrrolidone are added to according to weight ratio and are placed in circle
In the flask of bottom, enhanced PVDF binder is made in magnetic agitation after mixing.
2. a kind of preparation method of enhancement type polyvinylidene difluoroethylene lithium battery conductive adhesive according to claim 1,
Be characterized in that the silane coupled agent composition refer to KH550, KH560 in silanes coupling agent, KH570, KH590,
The mixture of two or more any mass ratio in KH792.
3. a kind of preparation method of enhancement type polyvinylidene difluoroethylene lithium battery conductive adhesive according to claim 1,
It is characterized in that the magnetic agitation, mixing time are 1~3h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910016180.5A CN109742402A (en) | 2019-01-08 | 2019-01-08 | A kind of preparation method of enhancement type polyvinylidene difluoroethylene lithium battery conductive adhesive |
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| CN201910016180.5A CN109742402A (en) | 2019-01-08 | 2019-01-08 | A kind of preparation method of enhancement type polyvinylidene difluoroethylene lithium battery conductive adhesive |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111653785A (en) * | 2020-06-28 | 2020-09-11 | 福建师范大学 | Preparation method of modified polyvinylidene fluoride conductive binder |
| CN111725498A (en) * | 2020-06-28 | 2020-09-29 | 福建师范大学 | Preparation method of ternary material NCM positive electrode slurry of lithium ion battery |
| CN113174208A (en) * | 2021-04-21 | 2021-07-27 | 山东航橡新材料有限公司 | Binder composition for lithium ion battery and preparation method thereof |
| CN113265538A (en) * | 2021-05-21 | 2021-08-17 | 中南大学 | Preparation method of high-conductivity porous electrode for lithium extraction in salt lake |
| CN114566648A (en) * | 2022-02-12 | 2022-05-31 | 浙江巨圣氟化学有限公司 | PVDF lithium battery positive electrode conductive binder and preparation method of lithium battery positive electrode |
| CN114920868A (en) * | 2022-06-22 | 2022-08-19 | 万华化学(四川)电池材料科技有限公司 | Fluoropolymer capable of improving adhesive force, preparation process and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1244953A (en) * | 1997-11-19 | 2000-02-16 | 三菱电机株式会社 | Bounding agent for cells and cells using the same |
| CN1277236A (en) * | 2000-06-08 | 2000-12-20 | 华南理工大学 | Adhesive for lithium ion cell |
| CN107845812A (en) * | 2016-09-18 | 2018-03-27 | 宁德新能源科技有限公司 | Anode pole piece and preparation method thereof and secondary cell |
-
2019
- 2019-01-08 CN CN201910016180.5A patent/CN109742402A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1244953A (en) * | 1997-11-19 | 2000-02-16 | 三菱电机株式会社 | Bounding agent for cells and cells using the same |
| CN1277236A (en) * | 2000-06-08 | 2000-12-20 | 华南理工大学 | Adhesive for lithium ion cell |
| CN107845812A (en) * | 2016-09-18 | 2018-03-27 | 宁德新能源科技有限公司 | Anode pole piece and preparation method thereof and secondary cell |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111653785A (en) * | 2020-06-28 | 2020-09-11 | 福建师范大学 | Preparation method of modified polyvinylidene fluoride conductive binder |
| CN111725498A (en) * | 2020-06-28 | 2020-09-29 | 福建师范大学 | Preparation method of ternary material NCM positive electrode slurry of lithium ion battery |
| CN111725498B (en) * | 2020-06-28 | 2022-09-20 | 福建师范大学 | Preparation method of ternary material NCM positive electrode slurry of lithium ion battery |
| CN111653785B (en) * | 2020-06-28 | 2022-09-30 | 福建师范大学 | Preparation method of modified polyvinylidene fluoride conductive adhesive |
| CN113174208A (en) * | 2021-04-21 | 2021-07-27 | 山东航橡新材料有限公司 | Binder composition for lithium ion battery and preparation method thereof |
| CN113174208B (en) * | 2021-04-21 | 2022-06-14 | 山东航橡新材料有限公司 | Binder composition for lithium ion battery and preparation method thereof |
| CN113265538A (en) * | 2021-05-21 | 2021-08-17 | 中南大学 | Preparation method of high-conductivity porous electrode for lithium extraction in salt lake |
| CN114566648A (en) * | 2022-02-12 | 2022-05-31 | 浙江巨圣氟化学有限公司 | PVDF lithium battery positive electrode conductive binder and preparation method of lithium battery positive electrode |
| CN114566648B (en) * | 2022-02-12 | 2024-01-26 | 浙江巨圣氟化学有限公司 | PVDF lithium battery anode conductive adhesive and preparation method of lithium battery anode |
| CN114920868A (en) * | 2022-06-22 | 2022-08-19 | 万华化学(四川)电池材料科技有限公司 | Fluoropolymer capable of improving adhesive force, preparation process and application |
| CN114920868B (en) * | 2022-06-22 | 2023-09-19 | 万华化学(四川)电池材料科技有限公司 | Fluorine-containing polymer for improving adhesive force, preparation process and application |
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