WO2020078308A1 - Batterie secondaire - Google Patents

Batterie secondaire Download PDF

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Publication number
WO2020078308A1
WO2020078308A1 PCT/CN2019/110993 CN2019110993W WO2020078308A1 WO 2020078308 A1 WO2020078308 A1 WO 2020078308A1 CN 2019110993 W CN2019110993 W CN 2019110993W WO 2020078308 A1 WO2020078308 A1 WO 2020078308A1
Authority
WO
WIPO (PCT)
Prior art keywords
negative electrode
positive electrode
secondary battery
positive
negative
Prior art date
Application number
PCT/CN2019/110993
Other languages
English (en)
Chinese (zh)
Inventor
王家政
申玉良
康蒙
何立兵
朱宝健
徐守江
Original Assignee
宁德时代新能源科技股份有限公司
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 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2020078308A1 publication Critical patent/WO2020078308A1/fr

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Classifications

    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H01M2004/021—Physical characteristics, e.g. porosity, surface area
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • Rechargeable batteries have outstanding characteristics such as light weight, high energy density, no pollution, no memory effect, and long service life, so they are widely used in mobile phones, computers, household appliances, power tools and other fields. Among them, charging time is increasingly valued by end consumers, and is also an important factor limiting the popularity of rechargeable batteries. From the technical principle, the key to determining the charging speed of rechargeable batteries is the negative electrode.
  • the positive pole will be discharged to a very high Potential, and the positive pole piece cannot accept a large amount of active ions in a moment, resulting in obvious polarization, the battery reaches the cut-off voltage in advance, the battery capacity cannot be exerted, and the structure of the positive electrode active material is damaged during the long-term cycle use of the battery It is also relatively large, and thus the cycle life of the battery will also be affected.
  • the lower limit value of (D50 negative electrode ⁇ M negative electrode ) / [(D50 positive electrode + 4) ⁇ (M positive electrode + 4)] may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7,0.8, (D50 negative negative ⁇ M) / [(D50 positive electrode +4) ⁇ (positive M +4)] the upper limit may be 0.5,0.6,0.7,0.8,0.9,1.0,1.1,1.2, 1.3, 1.4, 1.5.
  • the positive electrode film capacitance per unit area of the positive electrode M 1mAh / cm 2 ⁇ 10mAh / cm 2; more preferably, the positive electrode capacitance per unit area of the diaphragm M is a positive electrode 2mAh / cm 2 ⁇ 6mAh / cm 2.
  • the positive pole piece can have better kinetic performance, which is more conducive to improving the rapid discharge capacity and energy density of the secondary battery.
  • the separator is provided between the positive pole piece and the negative pole piece to play a role of isolation.
  • the type of the separator is not specifically limited, and may be any separator material used in existing batteries, such as polyethylene, polypropylene, polyvinylidene fluoride, and their multilayer composite membranes, but not limited to These ones.
  • Step 1) Fully discharge the lithium-ion battery containing the positive pole pieces of each embodiment and comparative example, and let it stand for 5 minutes, then charge to the cut-off voltage, where the charging process is to charge at a constant current of 1 / 3C to the cut-off voltage , And then charge to 0.03C with the constant voltage of the cut-off voltage, the charging capacity C 0 obtained at this time is the discharge capacity of the positive electrode diaphragm.
  • the lithium ion batteries prepared in the examples and comparative examples were fully charged at 1C and then discharged at 1C and 4C, respectively, and the ratio of the discharge capacity of 4C to the discharge capacity of 1C was counted. If the ratio is greater than or equal to 95%, it means that the discharge performance of the lithium-ion battery is excellent; if the ratio is between 85% and 95%, it means that the discharge performance of the lithium-ion battery is moderate; if the ratio is less than or equal to 85%, it means that the lithium ion The discharge performance of the battery is poor.
  • the lithium ion batteries prepared in the examples and comparative examples were fully charged at 1 C rate and fully discharged at 1 C rate, and the actual discharge energy at this time was recorded; Weighing, the ratio of the actual discharge energy of the lithium ion battery 1C to the weight of the lithium ion battery is the actual energy density of the lithium ion battery.
  • the batteries of Examples 1-16 can have both long cycle life, high energy density, and rapid charge and discharge capabilities, because the batteries of Examples 1-16 all satisfy 0.1 ⁇ (D50 negative electrode ⁇ M negative electrode ) / [(D50 positive electrode + 4) ⁇ (M positive electrode + 4)] ⁇ 1.5, at this time, the dynamic performance of the positive pole piece and the negative pole piece can be well matched, and the resulting battery can have a long Cycle life, high energy density and fast charge and discharge capability.
  • the positive pole piece preferably satisfies 35 ⁇ (D50 positive electrode + 4) ⁇ (M positive electrode + 4) ⁇ 230
  • the negative pole piece preferably satisfies 1 ⁇ D50 negative electrode ⁇ M negative electrode ⁇ 100.
  • the sheet and the negative pole piece can maintain better dynamic performance, which is more conducive to improving the cycle life, energy density, fast charging ability and fast discharging ability of the battery.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne une batterie secondaire. La batterie secondaire comprend une pièce d'électrode positive, une pièce d'électrode négative, un électrolyte et un film isolant ; l'élément d'électrode positive comprend un collecteur de courant positif et un diaphragme positif disposé sur au moins une surface du collecteur de courant positif et comprenant un matériau actif positif ; et l'élément d'électrode négative comprend un collecteur de courant négatif et un diaphragme négatif disposé sur au moins une surface du collecteur de courant négatif et comprenant un matériau actif négatif. La batterie secondaire satisfait également : 0,1 ≤ (D50électrode négative×Mélectrode négative)/[(D50électrode positive+4)×(Mélectrode négative+4)] ≤ 1,5. La batterie secondaire présente les avantages d'une longue durée de vie, d'une densité d'énergie élevée et d'une capacité de charge et de décharge rapide, fournie par la présente invention, est obtenue en mettant en correspondance raisonnablement une relation entre les tailles de particules des matériaux actifs positifs et négatifs et les capacités des membranes positives et négatives.
PCT/CN2019/110993 2018-10-17 2019-10-14 Batterie secondaire WO2020078308A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811208710.8 2018-10-17
CN201811208710.8A CN109509909B (zh) 2018-10-17 2018-10-17 二次电池

Publications (1)

Publication Number Publication Date
WO2020078308A1 true WO2020078308A1 (fr) 2020-04-23

Family

ID=65746702

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/110993 WO2020078308A1 (fr) 2018-10-17 2019-10-14 Batterie secondaire

Country Status (2)

Country Link
CN (1) CN109509909B (fr)
WO (1) WO2020078308A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109509909B (zh) * 2018-10-17 2020-07-03 宁德时代新能源科技股份有限公司 二次电池
CN112242551B (zh) 2019-07-16 2021-12-07 宁德时代新能源科技股份有限公司 二次电池
CN115295791A (zh) * 2019-09-26 2022-11-04 宁德时代新能源科技股份有限公司 二次电池及含有该二次电池的电池模块、电池包、装置
CN112582596B (zh) 2019-09-27 2021-10-15 宁德时代新能源科技股份有限公司 二次电池及含有该二次电池的电池模组、电池包、装置
CN115498246A (zh) * 2022-09-22 2022-12-20 江苏正力新能电池技术有限公司 一种锂离子电池、电池模组和电池包
CN115458797A (zh) * 2022-10-27 2022-12-09 欣旺达电动汽车电池有限公司 一种二次电池及用电设备
CN116053564A (zh) * 2022-11-11 2023-05-02 江苏正力新能电池技术有限公司 一种二次电池、电池组、用电装置及二次电池的制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104584312A (zh) * 2012-08-16 2015-04-29 日本电气株式会社 锂二次电池及其制造方法
CN106299236A (zh) * 2015-06-29 2017-01-04 新日铁住金化学株式会社 锂离子二次电池用负极及二次电池
CN106463780A (zh) * 2014-06-24 2017-02-22 株式会社钟化 非水电解质二次电池、以及将多个该非水电解质二次电池连接而成的组电池
WO2017187637A1 (fr) * 2016-04-28 2017-11-02 日産自動車株式会社 Batterie secondaire à électrolyte non aqueux
CN107925057A (zh) * 2015-10-30 2018-04-17 株式会社Lg化学 二次电池用正极、其制备方法以及包含所述正极的锂二次电池
CN109509909A (zh) * 2018-10-17 2019-03-22 宁德时代新能源科技股份有限公司 二次电池

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JP2000036300A (ja) * 1998-07-17 2000-02-02 Shin Kobe Electric Mach Co Ltd 非水電解質二次電池用負極板
CN102195079B (zh) * 2010-03-12 2015-03-04 江苏海四达电源股份有限公司 一种大容量高功率磷酸亚铁锂动力电池及其制造方法
CN101826634B (zh) * 2010-05-17 2015-07-01 江西省福斯特新能源有限公司 一种锂离子电池及其制作方法
CN103441305B (zh) * 2013-08-27 2016-09-21 深圳市贝特瑞新能源材料股份有限公司 一种动力与储能锂离子电池及其制备方法
CN107768733B (zh) * 2017-10-13 2019-12-03 江苏海四达电源股份有限公司 一种锂电池及其制备方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104584312A (zh) * 2012-08-16 2015-04-29 日本电气株式会社 锂二次电池及其制造方法
CN106463780A (zh) * 2014-06-24 2017-02-22 株式会社钟化 非水电解质二次电池、以及将多个该非水电解质二次电池连接而成的组电池
CN106299236A (zh) * 2015-06-29 2017-01-04 新日铁住金化学株式会社 锂离子二次电池用负极及二次电池
CN107925057A (zh) * 2015-10-30 2018-04-17 株式会社Lg化学 二次电池用正极、其制备方法以及包含所述正极的锂二次电池
WO2017187637A1 (fr) * 2016-04-28 2017-11-02 日産自動車株式会社 Batterie secondaire à électrolyte non aqueux
CN109509909A (zh) * 2018-10-17 2019-03-22 宁德时代新能源科技股份有限公司 二次电池

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Publication number Publication date
CN109509909B (zh) 2020-07-03
CN109509909A (zh) 2019-03-22

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