CN115136348A - 一种负极极片、包含该负极极片的电化学装置及电子装置 - Google Patents

一种负极极片、包含该负极极片的电化学装置及电子装置 Download PDF

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CN115136348A
CN115136348A CN202080097358.4A CN202080097358A CN115136348A CN 115136348 A CN115136348 A CN 115136348A CN 202080097358 A CN202080097358 A CN 202080097358A CN 115136348 A CN115136348 A CN 115136348A
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silicon
based particles
negative electrode
pole piece
negative pole
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廖群超
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Ningde Amperex Technology Ltd
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Ningde Amperex Technology Ltd
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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
    • 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
    • H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • 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
    • H01M4/139—Processes of manufacture
    • H01M4/1395—Processes of manufacture of 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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/364—Composites as mixtures
    • 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
    • H01M4/362—Composites
    • H01M4/366—Composites as layered products
    • 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
    • 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
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    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • 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
    • 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)
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  • Engineering & Computer Science (AREA)
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  • Inorganic Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)
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Abstract

本申请提供了一种负极极片、包含该负极极片的电化学装置和电子装置，其中负极极片包含负极材料层，所述负极材料层包含硅基颗粒和石墨颗粒，所述硅基颗粒中硅含量B为20wt％至60wt％，所述硅基颗粒的孔隙率α1为15％至60％，所述负极极片孔隙率α2为15％至41％，通过以上设计，使负极极片既能有一定的空间供嵌锂膨胀，又能兼顾其结构的稳定性和加工性，从而有效改善电化学装置的循环性能和膨胀变形的问题。

Description

PCT国内申请，说明书已公开。

Claims (11)

  1. PCT国内申请，权利要求书已公开。
CN202080097358.4A 2020-12-28 2020-12-28 一种负极极片、包含该负极极片的电化学装置及电子装置 Pending CN115136348A (zh)

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PCT/CN2020/140366 WO2022140975A1 (zh) 2020-12-28 2020-12-28 一种负极极片、包含该负极极片的电化学装置及电子装置

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CN115136348A true CN115136348A (zh) 2022-09-30

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EP (1) EP4270532A1 (zh)
KR (1) KR20230117625A (zh)
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160006024A1 (en) * 2014-07-03 2016-01-07 GM Global Technology Operations LLC Negative electrode material for lithium-based batteries
CN105981203A (zh) * 2014-02-07 2016-09-28 信越化学工业株式会社 非水电解质二次电池用负极材料、非水电解质二次电池用负极及非水电解质二次电池用负极的制造方法以及非水电解质二次电池
CN106450246A (zh) * 2016-12-28 2017-02-22 江西正拓新能源科技股份有限公司 一种锂离子电池用多孔硅‑碳复合材料及其制备方法
CN106876665A (zh) * 2015-12-14 2017-06-20 中国科学院苏州纳米技术与纳米仿生研究所 硅碳复合颗粒、其制备方法及应用
CN107204431A (zh) * 2016-03-16 2017-09-26 比亚迪股份有限公司 一种锂离子电池负极活性材料及其制备方法、包含该负极活性材料的负极和电池
CN110867560A (zh) * 2018-08-28 2020-03-06 宁德时代新能源科技股份有限公司 一种负极极片及二次电池

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105981203A (zh) * 2014-02-07 2016-09-28 信越化学工业株式会社 非水电解质二次电池用负极材料、非水电解质二次电池用负极及非水电解质二次电池用负极的制造方法以及非水电解质二次电池
US20160006024A1 (en) * 2014-07-03 2016-01-07 GM Global Technology Operations LLC Negative electrode material for lithium-based batteries
CN106876665A (zh) * 2015-12-14 2017-06-20 中国科学院苏州纳米技术与纳米仿生研究所 硅碳复合颗粒、其制备方法及应用
CN107204431A (zh) * 2016-03-16 2017-09-26 比亚迪股份有限公司 一种锂离子电池负极活性材料及其制备方法、包含该负极活性材料的负极和电池
CN106450246A (zh) * 2016-12-28 2017-02-22 江西正拓新能源科技股份有限公司 一种锂离子电池用多孔硅‑碳复合材料及其制备方法
CN110867560A (zh) * 2018-08-28 2020-03-06 宁德时代新能源科技股份有限公司 一种负极极片及二次电池

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EP4270532A1 (en) 2023-11-01
KR20230117625A (ko) 2023-08-08

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