CN115066777A - 负极极片、电化学装置和电子装置 - Google Patents

负极极片、电化学装置和电子装置 Download PDF

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Publication number
CN115066777A
CN115066777A CN202080096362.9A CN202080096362A CN115066777A CN 115066777 A CN115066777 A CN 115066777A CN 202080096362 A CN202080096362 A CN 202080096362A CN 115066777 A CN115066777 A CN 115066777A
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silicon
active material
based material
material layer
negative electrode
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陈志焕
姜道义
易婷
崔航
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Ningde Amperex Technology Ltd
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Ningde Amperex Technology Ltd
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Publication of CN115066777A publication Critical patent/CN115066777A/zh
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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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/134—Electrodes based on metals, Si or alloys
    • 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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H01M4/386—Silicon or alloys based on silicon
    • 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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/483—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides for non-aqueous cells
    • 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
    • H01M2004/021—Physical characteristics, e.g. porosity, surface area
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • 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
    • 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
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

一种负极极片(12)、电化学装置和电子装置。负极极片(12)包括：集流体(1)；活性物质层(2)，位于集流体(1)上；其中，活性物质层(2)包括硅基材料，相同面积且不同位置处的活性物质层中的硅元素的质量比的最小值为X1，最大值为X2，X1/X2的值为M，其中M≥0.7；其中，相同面积且不同位置处的活性物质层在800℃内的热重分析(TG)的失重比例最小值为Y1，最大值为Y2，Y1/Y2的值为N，其中N≥0.7。通过使活性物质层(2)中的硅基材料和粘结剂均匀分散，改善了电化学装置的倍率性能、循环性能并且降低了电极组件的膨胀。

Description

PCT国内申请，说明书已公开。

Claims (10)

  1. PCT国内申请，权利要求书已公开。
CN202080096362.9A 2020-03-26 2020-03-26 负极极片、电化学装置和电子装置 Pending CN115066777A (zh)

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PCT/CN2020/081306 WO2021189339A1 (zh) 2020-03-26 2020-03-26 负极极片、电化学装置和电子装置

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CN115066777A true CN115066777A (zh) 2022-09-16

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US (1) US20230021755A1 (zh)
EP (1) EP4131535A1 (zh)
CN (1) CN115066777A (zh)
WO (1) WO2021189339A1 (zh)

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WO2023082247A1 (zh) * 2021-11-15 2023-05-19 宁德新能源科技有限公司 电极及其制备方法、电化学装置和电子装置
WO2023082246A1 (zh) * 2021-11-15 2023-05-19 宁德新能源科技有限公司 电极及其制备方法、电化学装置和电子装置
CN114156479A (zh) * 2021-11-29 2022-03-08 珠海冠宇电池股份有限公司 极片及电化学装置

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CN104205442A (zh) * 2012-06-18 2014-12-10 Jsr株式会社 蓄电设备电极用粘结剂组合物、蓄电设备电极用浆料、蓄电设备电极和蓄电设备
JP6016573B2 (ja) * 2012-10-18 2016-10-26 日立マクセル株式会社 負極合剤含有組成物の製造方法、リチウム二次電池用負極の製造方法、およびリチウム二次電池の製造方法
CN109075376B (zh) * 2016-04-28 2020-05-08 远景Aesc 日本有限公司 非水电解质二次电池
US10374225B2 (en) * 2016-04-28 2019-08-06 Nissan Motor Co., Ltd. Non-aqueous electrolyte secondary battery
CN110890531B (zh) * 2019-11-14 2021-03-05 宁德新能源科技有限公司 负极材料及包含其的电化学装置和电子装置
CN110911635B (zh) * 2019-11-14 2021-01-01 宁德新能源科技有限公司 负极材料及包含其的电化学装置和电子装置
CN113346059B (zh) * 2019-11-14 2022-08-19 宁德新能源科技有限公司 负极材料及包含其的电化学装置和电子装置

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US20230021755A1 (en) 2023-01-26
EP4131535A1 (en) 2023-02-08
WO2021189339A1 (zh) 2021-09-30

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