WO2017177946A1 - Wearable flexible battery with high safety performance and manufacturing process thereof - Google Patents

Wearable flexible battery with high safety performance and manufacturing process thereof Download PDF

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WO2017177946A1
WO2017177946A1 PCT/CN2017/080461 CN2017080461W WO2017177946A1 WO 2017177946 A1 WO2017177946 A1 WO 2017177946A1 CN 2017080461 W CN2017080461 W CN 2017080461W WO 2017177946 A1 WO2017177946 A1 WO 2017177946A1
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flexible
battery
electrode
flexible battery
wearable
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PCT/CN2017/080461
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French (fr)
Chinese (zh)
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薛永
谢志懋
王占东
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佛山市欣源电子股份有限公司
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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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/44—Fibrous material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • 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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0025—Organic electrolyte
    • 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

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  • the invention relates to the field of battery preparation, and in particular to a method for producing a flexible battery.
  • the invention discloses a wearable flexible battery with high safety performance and a manufacturing process thereof, which not only improves the mechanical flexibility of the battery, but also has excellent bending and tensile properties, and ensures that the battery is not deformed by external force. A crack or overall failure may occur to improve the safety and mechanical properties of the flexible battery.
  • the present invention includes a positive electrode flexible electrode 1 and a negative electrode flexible electrode 3, and a flexible separator 2 is disposed between the positive electrode flexible electrode 1 and the negative electrode flexible electrode 3.
  • a manufacturing process for a wearable flexible battery with high safety performance the following production steps:
  • Step 1 by electrospinning to obtain a flexible membrane 2 required for a flexible battery
  • Step 2 preparing a flexible battery electrolyte, and adding a flexible battery electrolyte to LiFePO 4 and graphene;
  • Step 3 The contact surface of the positive and negative electrodes and the flexible membrane 2 must be coated with a flexible adhesive to ensure that the flexible battery does not undergo cracking or overall failure when deformed by external force;
  • Step 4 Finished product inspection, passing impact test and safety test
  • Step 5 applies a practical invention to a flexible battery to produce flexible wearable equipment.
  • the flexible battery electrolyte is prepared by the following materials: carboxymethyl cellulose 20-30%, polyimide 2-16%, polyacrylate terpolymer latex 5-8%, phenolic resin 18 to 42%, polyvinyl alcohol 8 to 12%, and butyl titanate 3 to 18%;
  • the flexible adhesive is prepared by the following materials: 12 to 25% of polyvinylidene fluoride, 10 to 28% of N-methylpyrrolidone (NMP), 3 to 6% of phenolic resin, 2 to 3% of amino resin, and poly
  • NMP N-methylpyrrolidone
  • the acrylate terpolymer latex is 10 to 30%
  • the styrene-butadiene latex is 8 to 13%
  • the dimethyl fumarate is 1 to 6%
  • the dehydroacetic acid is 3 to 7%
  • the thiamine is 18 to 23%.
  • the flexible battery electrolyte has certain adsorption characteristics, ensuring that the flexible battery does not leak electrolyte under the action of external force; the main material of the electrode is still the former LiFePO 4 and graphene, and in the development of the electrolyte
  • the flexible battery electrolyte leaks due to its easy deformation, and the flexible battery electrolyte has a certain absorption function. It is interposed between the flexible electrode and the flexible diaphragm in the flexible battery and has good adhesion to the electrode and the diaphragm. Otherwise, it is prone to rupture after mechanical deformation. In order to maintain the original energy density in research and development, the safety performance, electrochemical performance and mechanical properties of the separator during battery charging and discharging are improved.
  • the flexible adhesive ensures this flexibility.
  • Figure 1 is a schematic view of the structure of the present invention.
  • the positive electrode flexible electrode 1 and the negative electrode flexible electrode 3 are provided with a flexible separator 2 between the positive electrode flexible electrode 1 and the negative electrode flexible electrode 3.
  • a manufacturing process for a wearable flexible battery with high safety performance the following production steps:
  • Step 1 by electrospinning to obtain a flexible membrane 2 required for a flexible battery
  • Step 2 preparing a flexible battery electrolyte, and adding a flexible battery electrolyte to LiFePO 4 and graphene;
  • Step 3 The contact surface of the positive and negative electrodes and the flexible membrane 2 must be coated with a flexible adhesive to ensure that the flexible battery does not undergo cracking or overall failure when deformed by external force;
  • Step 4 Finished product inspection, passing impact test and safety test
  • Step 5 applies a practical invention to a flexible battery to produce flexible wearable equipment.
  • the flexible battery electrolyte is prepared by the following materials: carboxymethyl cellulose 23%, polyimide 9%, polyacrylate terpolymer emulsion 6%, phenolic resin 38%, polyvinyl alcohol 11%, butyl titanate 23%;
  • the flexible adhesive is prepared by the following materials: polyvinylidene fluoride 19%, N-methylpyrrolidone (NMP) 25%, phenolic resin 4%, amino resin 2.5%, polyacrylate terpolymer latex 11%, styrene-butadiene latex 9%, dimethyl fumarate 3.5%, dehydroacetic acid 5%, thiamine 21%.
  • the flexible battery electrolyte has certain adsorption characteristics, ensuring that the flexible battery does not leak electrolyte under the action of external force; the main material of the electrode is still the former LiFePO 4 and graphene, and in the development of the electrolyte
  • the flexible battery electrolyte leaks due to its easy deformation, and the flexible battery electrolyte has a certain absorption function. It is interposed between the flexible electrode and the flexible diaphragm in the flexible battery and has good adhesion to the electrode and the diaphragm. Otherwise, it is prone to rupture after mechanical deformation. In order to maintain the original energy density in research and development, the safety performance, electrochemical performance and mechanical properties of the separator during battery charging and discharging are improved.
  • the flexible adhesive ensures this flexibility.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Cell Separators (AREA)
  • Secondary Cells (AREA)

Abstract

Provided are a wearable flexible battery with high safety performance and a manufacturing process thereof. The wearable flexible battery is characterized in that a flexible separator is disposed between a flexible positive electrode and a flexible negative electrode. The present application improves mechanical flexible performance of a battery, has excellent bendable and stretchable performance, and ensures that the situation of layer spallation or malfunction of the whole battery does not occur when the battery is deformed due to external force applied to the battery, so as to improve the security performance and mechanical performance of the flexible battery.

Description

一种安全性能高的可穿戴柔性电池及其制造工艺Wearable flexible battery with high safety performance and manufacturing process thereof 技术领域Technical field
本发明涉及电池制备领域，具体涉及柔性电池的生产方法。The invention relates to the field of battery preparation, and in particular to a method for producing a flexible battery.
背景技术Background technique
目前，国内市场上在柔性锂离子电池方面，锂离子电极材料的制备技术已经取得了很大的进步，并也取得了相应的技术成果。但是，在电性能方面，锂离子的柔性电池还是离传统锂离子电池有一定的差距，石墨烯已经作为锂离子核心材料，也被广泛应用，但是在力学性能上还是有一定的局限性，而且制约柔性电池发展有着至关重要的四个问题，就目前来说也最最棘手的。一、电极材料和柔性电解液材料以至于隔膜材料适应各种复杂受力的应用；二、柔性电池材料具有一定的自我修复能力；三、柔性电池的快速充放电能力；四、柔性电极制备的新工艺。At present, in the domestic market, in the flexible lithium ion battery, the preparation technology of the lithium ion electrode material has made great progress, and the corresponding technical achievements have also been obtained. However, in terms of electrical performance, lithium-ion flexible batteries are still far from the traditional lithium-ion batteries. Graphene has been widely used as a lithium ion core material, but it still has certain limitations in mechanical properties. There are four critical issues that constrain the development of flexible batteries, and at the moment it is the most difficult. First, the electrode material and the flexible electrolyte material so that the diaphragm material can adapt to various complicated force applications; Second, the flexible battery material has a certain self-repairing ability; Third, the rapid charge and discharge capability of the flexible battery; Fourth, the preparation of the flexible electrode New Technology.
发明内容Summary of the invention
本发明公开了一种安全性能高的可穿戴柔性电池及其制造工艺，不但提升了电池力学柔性性能，具备有优良的弯折、拉伸性能，并保证电池在受外界力发生形变的时候不会发生层裂或整体失效的情况，以提高柔性电池的安全性能和力学性能。The invention discloses a wearable flexible battery with high safety performance and a manufacturing process thereof, which not only improves the mechanical flexibility of the battery, but also has excellent bending and tensile properties, and ensures that the battery is not deformed by external force. A crack or overall failure may occur to improve the safety and mechanical properties of the flexible battery.
本发明包括有：正极柔性电极1和负极柔性电极3，其正极柔性电极1与负极柔性电极3之间设有柔性隔膜2。The present invention includes a positive electrode flexible electrode 1 and a negative electrode flexible electrode 3, and a flexible separator 2 is disposed between the positive electrode flexible electrode 1 and the negative electrode flexible electrode 3.
一种安全性能高的可穿戴柔性电池其制造工艺，以下生产步骤：A manufacturing process for a wearable flexible battery with high safety performance, the following production steps:
步骤①通过电纺得到柔性电池所需柔性隔膜2；Step 1 by electrospinning to obtain a flexible membrane 2 required for a flexible battery;
步骤②配制柔性电池电解液，并在LiFePO4和石墨烯之中加入柔性电池电解液；Step 2: preparing a flexible battery electrolyte, and adding a flexible battery electrolyte to LiFePO 4 and graphene;
步骤③在正负电极、柔性隔膜2的接触表面必须涂有柔性黏合剂，保证此柔性电池在受外界力发生形变的时候不会发生层裂或整体失效的情况；Step 3: The contact surface of the positive and negative electrodes and the flexible membrane 2 must be coated with a flexible adhesive to ensure that the flexible battery does not undergo cracking or overall failure when deformed by external force;
步骤④成品检测，通过冲击试验和安全试验；Step 4 Finished product inspection, passing impact test and safety test;
步骤⑤对柔性电池进行实用发明，生产柔性可穿戴装备。Step 5 applies a practical invention to a flexible battery to produce flexible wearable equipment.
所述的柔性电池电解液由以下材料配比而成：羧甲基纤维素20～30％、聚酰亚胺2～16％、聚丙烯酸酯类三元共聚物乳5～8％、酚醛树脂18～42％、聚乙烯醇8～12％、钛酸丁酯3～18％；The flexible battery electrolyte is prepared by the following materials: carboxymethyl cellulose 20-30%, polyimide 2-16%, polyacrylate terpolymer latex 5-8%, phenolic resin 18 to 42%, polyvinyl alcohol 8 to 12%, and butyl titanate 3 to 18%;
所述的柔性黏合剂以下材料配比而成：聚偏氟乙烯12～25％、N-甲基吡咯烷酮(NMP)10～28％、酚醛树脂3～6％、氨基树脂2～3％、聚丙烯酸酯类三元共聚物乳胶10～30％、丁苯乳胶8～13％、富马酸二甲酯1～6％、脱氢醋酸3～7％、硫胺18～23％。The flexible adhesive is prepared by the following materials: 12 to 25% of polyvinylidene fluoride, 10 to 28% of N-methylpyrrolidone (NMP), 3 to 6% of phenolic resin, 2 to 3% of amino resin, and poly The acrylate terpolymer latex is 10 to 30%, the styrene-butadiene latex is 8 to 13%, the dimethyl fumarate is 1 to 6%, the dehydroacetic acid is 3 to 7%, and the thiamine is 18 to 23%.
柔性电池电解液具有还一定的吸附的特性，保证柔性电池在受外力的作用下不会发生电解液的泄露；电极的主体材料依然是之前的LiFePO4和石墨烯，而在电解液的开发上柔性电池电解液，因其易受力形变发生漏液，柔性电池电解液具有一定的吸收功能，在柔性电池中介于柔性电极和柔性隔膜之间且和电极以及隔膜都有很好的粘合作用，否则在机械变形后容易发生破裂，要想在研发上尽量保持原有能量密度的基础上提高了隔膜在电池充 放电过程中的安全性能、电化学性能和力学性能，柔性黏合剂保证此柔性电池在受外界力发生形变的时候不会发生层裂或整体失效的情况，大大的增加柔性电池在发生形变时的安全性能，具备有优良的弯折、拉伸性能，并保证电池在受外界力发生形变的时候不会发生层裂或整体失效的情况，以提高柔性电池的安全性能和力学性能。The flexible battery electrolyte has certain adsorption characteristics, ensuring that the flexible battery does not leak electrolyte under the action of external force; the main material of the electrode is still the former LiFePO 4 and graphene, and in the development of the electrolyte The flexible battery electrolyte leaks due to its easy deformation, and the flexible battery electrolyte has a certain absorption function. It is interposed between the flexible electrode and the flexible diaphragm in the flexible battery and has good adhesion to the electrode and the diaphragm. Otherwise, it is prone to rupture after mechanical deformation. In order to maintain the original energy density in research and development, the safety performance, electrochemical performance and mechanical properties of the separator during battery charging and discharging are improved. The flexible adhesive ensures this flexibility. When the battery is deformed by external force, it will not cause delamination or overall failure, which greatly increases the safety performance of the flexible battery when it is deformed. It has excellent bending and tensile properties and ensures that the battery is exposed to the outside world. When the force is deformed, no cracking or overall failure occurs, so as to improve the safety performance of the flexible battery and Properties.
附图说明DRAWINGS
图1是本发明的结构示意图。Figure 1 is a schematic view of the structure of the present invention.
具体实施方式detailed description
如图1所示，正极柔性电极1和负极柔性电极3，其正极柔性电极1与负极柔性电极3之间设有柔性隔膜2。As shown in FIG. 1, the positive electrode flexible electrode 1 and the negative electrode flexible electrode 3 are provided with a flexible separator 2 between the positive electrode flexible electrode 1 and the negative electrode flexible electrode 3.
一种安全性能高的可穿戴柔性电池其制造工艺，以下生产步骤：A manufacturing process for a wearable flexible battery with high safety performance, the following production steps:
步骤①通过电纺得到柔性电池所需柔性隔膜2；Step 1 by electrospinning to obtain a flexible membrane 2 required for a flexible battery;
步骤②配制柔性电池电解液，并在LiFePO4和石墨烯之中加入柔性电池电解液；Step 2: preparing a flexible battery electrolyte, and adding a flexible battery electrolyte to LiFePO 4 and graphene;
步骤③在正负电极、柔性隔膜2的接触表面必须涂有柔性黏合剂，保证此柔性电池在受外界力发生形变的时候不会发生层裂或整体失效的情况；Step 3: The contact surface of the positive and negative electrodes and the flexible membrane 2 must be coated with a flexible adhesive to ensure that the flexible battery does not undergo cracking or overall failure when deformed by external force;
步骤④成品检测，通过冲击试验和安全试验；Step 4 Finished product inspection, passing impact test and safety test;
步骤⑤对柔性电池进行实用发明，生产柔性可穿戴装备。Step 5 applies a practical invention to a flexible battery to produce flexible wearable equipment.
所述的柔性电池电解液由以下材料配比而成：羧甲基纤维素23％、聚酰亚胺9％、聚丙烯酸酯类三元共聚物乳6％、酚醛树脂38％、聚乙烯醇11％、钛酸丁酯23％；The flexible battery electrolyte is prepared by the following materials: carboxymethyl cellulose 23%, polyimide 9%, polyacrylate terpolymer emulsion 6%, phenolic resin 38%, polyvinyl alcohol 11%, butyl titanate 23%;
所述的柔性黏合剂以下材料配比而成：聚偏氟乙烯19％、N-甲基吡咯烷酮(NMP)25％、酚醛树脂4％、氨基树脂2.5％、聚丙烯酸酯类三元共聚物乳胶11％、丁苯乳胶9％、富马酸二甲酯3.5％、脱氢醋酸5％、硫胺21％。The flexible adhesive is prepared by the following materials: polyvinylidene fluoride 19%, N-methylpyrrolidone (NMP) 25%, phenolic resin 4%, amino resin 2.5%, polyacrylate terpolymer latex 11%, styrene-butadiene latex 9%, dimethyl fumarate 3.5%, dehydroacetic acid 5%, thiamine 21%.
柔性电池电解液具有还一定的吸附的特性，保证柔性电池在受外力的作用下不会发生电解液的泄露；电极的主体材料依然是之前的LiFePO4和石墨烯，而在电解液的开发上柔性电池电解液，因其易受力形变发生漏液，柔性电池电解液具有一定的吸收功能，在柔性电池中介于柔性电极和柔性隔膜之间且和电极以及隔膜都有很好的粘合作用，否则在机械变形后容易发生破裂，要想在研发上尽量保持原有能量密度的基础上提高了隔膜在电池充放电过程中的安全性能、电化学性能和力学性能，柔性黏合剂保证此柔性电池在受外界力发生形变的时候不会发生层裂或整体失效的情况，大大的增加柔性电池在发生形变时的安全性能，具备有优良的弯折、拉伸性能，并保证电池在受外界力发生形变的时候不会发生层裂或整体失效的情况，以提高柔性电池的安全性能和力学性能。The flexible battery electrolyte has certain adsorption characteristics, ensuring that the flexible battery does not leak electrolyte under the action of external force; the main material of the electrode is still the former LiFePO 4 and graphene, and in the development of the electrolyte The flexible battery electrolyte leaks due to its easy deformation, and the flexible battery electrolyte has a certain absorption function. It is interposed between the flexible electrode and the flexible diaphragm in the flexible battery and has good adhesion to the electrode and the diaphragm. Otherwise, it is prone to rupture after mechanical deformation. In order to maintain the original energy density in research and development, the safety performance, electrochemical performance and mechanical properties of the separator during battery charging and discharging are improved. The flexible adhesive ensures this flexibility. When the battery is deformed by external force, it will not cause delamination or overall failure, which greatly increases the safety performance of the flexible battery when it is deformed. It has excellent bending and tensile properties and ensures that the battery is exposed to the outside world. When the force is deformed, no cracking or overall failure occurs, so as to improve the safety performance of the flexible battery and Properties.
最后应说明的是：显然，上述实施例仅仅是为清楚地说明本发明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引申出的显而易见的变化或变动仍处于本发明的保护范围之中。 It should be noted that the above-described embodiments are merely illustrative of the invention and are not intended to limit the embodiments. Other variations or modifications of the various forms may be made by those skilled in the art in light of the above description. There is no need and no way to exhaust all of the implementations. Obvious changes or variations resulting therefrom are still within the scope of the invention.

Claims (3)

  1. 一种安全性能高的可穿戴柔性电池，包括有：正极柔性电极(1)和负极柔性电极(3)，其特征在于：正极柔性电极(1)与负极柔性电极(3)之间设有柔性隔膜(2)。A wearable flexible battery with high safety performance includes: a positive electrode flexible electrode (1) and a negative electrode flexible electrode (3), characterized in that a flexibility is provided between the positive electrode flexible electrode (1) and the negative electrode flexible electrode (3) Diaphragm (2).
  2. 一种安全性能高的可穿戴柔性电池其制造工艺，其特征在于，以下生产步骤：A manufacturing process for a wearable flexible battery with high safety performance, characterized in that the following production steps:
    步骤①通过电纺得到柔性电池所需柔性隔膜(2)；Step 1 by electrospinning to obtain a flexible membrane (2) for a flexible battery;
    步骤②配制柔性电池电解液，并在LiFePO4和石墨烯之中加入柔性电池电解液；Step 2: preparing a flexible battery electrolyte, and adding a flexible battery electrolyte to LiFePO 4 and graphene;
    步骤③在正负电极、柔性隔膜(2)的接触表面必须涂有柔性黏合剂，保证此柔性电池在受外界力发生形变的时候不会发生层裂或整体失效的情况；Step 3: The contact surface of the positive and negative electrodes and the flexible membrane (2) must be coated with a flexible adhesive to ensure that the flexible battery does not undergo cracking or overall failure when deformed by external force;
    步骤④成品检测，通过冲击试验和安全试验；Step 4 Finished product inspection, passing impact test and safety test;
    步骤⑤对柔性电池进行实用发明，生产柔性可穿戴装备。Step 5 applies a practical invention to a flexible battery to produce flexible wearable equipment.
  3. 所述的柔性电池电解液由以下材料配比而成：羧甲基纤维素20～30％、聚酰亚胺2～16％、聚丙烯酸酯类三元共聚物乳5～8％、酚醛树脂18～42％、聚乙烯醇8～12％、钛酸丁酯3～18％；The flexible battery electrolyte is prepared by the following materials: carboxymethyl cellulose 20-30%, polyimide 2-16%, polyacrylate terpolymer latex 5-8%, phenolic resin 18 to 42%, polyvinyl alcohol 8 to 12%, and butyl titanate 3 to 18%;
    所述的柔性黏合剂以下材料配比而成：聚偏氟乙烯12～25％、N-甲基吡咯烷酮(NMP)10～28％、酚醛树脂3～6％、氨基树脂2～3％、聚丙烯酸酯类三元共聚物乳胶10～30％、丁苯乳胶8～13％、富马酸二甲酯1～6％、脱氢醋酸3～7％、硫胺18～23％。 The flexible adhesive is prepared by the following materials: 12 to 25% of polyvinylidene fluoride, 10 to 28% of N-methylpyrrolidone (NMP), 3 to 6% of phenolic resin, 2 to 3% of amino resin, and poly The acrylate terpolymer latex is 10 to 30%, the styrene-butadiene latex is 8 to 13%, the dimethyl fumarate is 1 to 6%, the dehydroacetic acid is 3 to 7%, and the thiamine is 18 to 23%.
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