WO2023232162A1 - Liant et son procédé de préparation, plaque d'électrode et batterie secondaire - Google Patents

Liant et son procédé de préparation, plaque d'électrode et batterie secondaire Download PDF

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Publication number
WO2023232162A1
WO2023232162A1 PCT/CN2023/108249 CN2023108249W WO2023232162A1 WO 2023232162 A1 WO2023232162 A1 WO 2023232162A1 CN 2023108249 W CN2023108249 W CN 2023108249W WO 2023232162 A1 WO2023232162 A1 WO 2023232162A1
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WO
WIPO (PCT)
Prior art keywords
fiber
conductive
imide
binder
group
Prior art date
Application number
PCT/CN2023/108249
Other languages
English (en)
Chinese (zh)
Inventor
岳敏
周竹欣
钱超
Original Assignee
深圳市研一新材料有限责任公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市研一新材料有限责任公司 filed Critical 深圳市研一新材料有限责任公司
Publication of WO2023232162A1 publication Critical patent/WO2023232162A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • 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
    • 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
    • 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
    • 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

Definitions

  • the imide polymer is composed of a diamine polymerizable monomer (its structure contains two amino groups) and a dianhydride (its structure contains ) prepared from polymerizable monomers.
  • the present invention can further improve the cracking problem of thick electrode poles, reduce the resistance of the electrode poles, and significantly improve the electrode poles.
  • imide polymer for example, it can be 60 parts by mass, 80 parts by mass or 100 parts by mass, etc.
  • 1 to 10 parts by mass of conductive particles (for example, it can be 1 part by mass, 3 parts by mass, 5 parts by mass, or 10 parts by mass, etc.).
  • the raw materials for preparing the imide polymer include diamine polymerizable monomers and dianhydride polymerizable monomers, and the diamines can The molar ratio of polymerized monomers to the binary anhydride polymerizable monomer is 1: (0.9 ⁇ 1.5).
  • Imide polymers have strong structural rigidity and are mostly difficult to dissolve in solvents.
  • the imide polymer according to the present invention can be dissolved in polar solvents.
  • inventions of the present invention provide a lithium ion secondary battery.
  • the secondary battery includes a positive electrode sheet, a negative electrode sheet, a separator and an electrolyte.
  • the positive electrode sheet and/or the negative electrode The piece is the electrode pole piece described in the third aspect.
  • the performance testing method for the electrode pole pieces prepared from the binders obtained in the above examples and comparative examples is as follows:
  • a binder including an imide polymer having the polar group, a first conductive fiber, a second conductive fiber and conductive particles, wherein the first conductive fiber is chemically bonded to the imide polymer.
  • Amine polymers are connected to each other, the average diameter of the second conductive fiber is not less than 0.3 ⁇ m, and the average length of the second conductive fiber is not less than 10 ⁇ m, which can obtain good flexibility, high maximum coating area density, and a coating layer An electrode piece with high peel strength and excellent conductivity.
  • the imide polymer in the binder provided in Comparative Example 1 is only physically mixed with the first conductive fiber.
  • the imide polymer does not form a chemical bond with the first conductive fiber, thus affecting the properties of the first conductive fiber. Dispersion, resulting in a substantial increase in the resistivity of the electrode pole pieces.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

Liant et son procédé de préparation, plaque d'électrode et batterie secondaire. Le liant comprend un polymère imide, des premières fibres conductrices, des secondes fibres conductrices et des particules conductrices, les premières fibres conductrices ayant des groupes réactifs, et les groupes réactifs et le polymère imide subissant une réaction chimique pour générer des liaisons chimiques ; et le diamètre moyen des secondes fibres conductrices n'est pas inférieur à 0,3 µm, et la longueur moyenne des secondes fibres conductrices n'est pas inférieure à 10 µm. Le liant selon la présente invention peut non seulement réduire efficacement la résistance de la plaque d'électrode de façon à améliorer la conductivité de la plaque d'électrode, mais peut également améliorer le problème de fissuration d'une plaque d'électrode épaisse et améliorer la densité de surface de revêtement de la plaque de façon à améliorer la densité d'énergie d'une batterie.
PCT/CN2023/108249 2022-12-28 2023-07-19 Liant et son procédé de préparation, plaque d'électrode et batterie secondaire WO2023232162A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211701858.1A CN115832310A (zh) 2022-12-28 2022-12-28 一种粘结剂及其制备方法、电极极片和二次电池
CN202211701858.1 2022-12-28

Publications (1)

Publication Number Publication Date
WO2023232162A1 true WO2023232162A1 (fr) 2023-12-07

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Application Number Title Priority Date Filing Date
PCT/CN2023/108249 WO2023232162A1 (fr) 2022-12-28 2023-07-19 Liant et son procédé de préparation, plaque d'électrode et batterie secondaire

Country Status (2)

Country Link
CN (1) CN115832310A (fr)
WO (1) WO2023232162A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115832310A (zh) * 2022-12-28 2023-03-21 深圳市研一新材料有限责任公司 一种粘结剂及其制备方法、电极极片和二次电池

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104937757A (zh) * 2013-01-25 2015-09-23 帝人株式会社 非水电解质二次电池用的超极细纤维状碳、超极细纤维状碳集合物、复合物、和电极活性物质层
JP2015229741A (ja) * 2014-06-06 2015-12-21 日本ゼオン株式会社 電気化学素子電極用導電性接着剤組成物、接着剤層付集電体および電気化学素子用電極
CN107845772A (zh) * 2016-09-19 2018-03-27 通用汽车环球科技运作有限责任公司 具有粘合剂、硅和导电颗粒之间改进的界面粘合性能的高性能硅电极
CN109980199A (zh) * 2019-03-20 2019-07-05 宁德新能源科技有限公司 负极活性材料及其制备方法及使用该负极活性材料的装置
CN113078317A (zh) * 2021-03-25 2021-07-06 无锡零一未来新材料技术研究院有限公司 一种锂离子电池用水性导电粘结剂及其制备方法
CN115832310A (zh) * 2022-12-28 2023-03-21 深圳市研一新材料有限责任公司 一种粘结剂及其制备方法、电极极片和二次电池

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104937757A (zh) * 2013-01-25 2015-09-23 帝人株式会社 非水电解质二次电池用的超极细纤维状碳、超极细纤维状碳集合物、复合物、和电极活性物质层
JP2015229741A (ja) * 2014-06-06 2015-12-21 日本ゼオン株式会社 電気化学素子電極用導電性接着剤組成物、接着剤層付集電体および電気化学素子用電極
CN107845772A (zh) * 2016-09-19 2018-03-27 通用汽车环球科技运作有限责任公司 具有粘合剂、硅和导电颗粒之间改进的界面粘合性能的高性能硅电极
CN109980199A (zh) * 2019-03-20 2019-07-05 宁德新能源科技有限公司 负极活性材料及其制备方法及使用该负极活性材料的装置
CN113078317A (zh) * 2021-03-25 2021-07-06 无锡零一未来新材料技术研究院有限公司 一种锂离子电池用水性导电粘结剂及其制备方法
CN115832310A (zh) * 2022-12-28 2023-03-21 深圳市研一新材料有限责任公司 一种粘结剂及其制备方法、电极极片和二次电池

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