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1. WO2020220686 - POSITIVE CURRENT COLLECTOR, POSITIVE ELECTRODE PLATE, SECONDARY BATTERY, AND DEVICE

Publication Number WO/2020/220686
Publication Date 05.11.2020
International Application No. PCT/CN2019/124826
International Filing Date 12.12.2019
IPC
H01M 4/66 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
64Carriers or collectors
66Selection of materials
H01M 4/64 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
64Carriers or collectors
CPC
H01M 10/0525
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 4/134
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
134Electrodes based on metals, Si or alloys
H01M 4/667
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
64Carriers or collectors
66Selection of materials
665Composites
667in the form of layers, e.g. coatings
Y02E 60/10
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
60Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
10Energy storage using batteries
Applicants
  • 宁德时代新能源科技股份有限公司 CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED [CN]/[CN]
Inventors
  • 梁成都 LIANG, Chengdu
  • 王铈汶 WANG, Shiwen
  • 黄起森 HUANG, Qisen
Agents
  • 北京东方亿思知识产权代理有限责任公司 BEIJING EAST IP LTD.
Priority Data
201910351219.928.04.2019CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) POSITIVE CURRENT COLLECTOR, POSITIVE ELECTRODE PLATE, SECONDARY BATTERY, AND DEVICE
(FR) COLLECTEUR DE COURANT POSITIF, PLAQUE D'ÉLECTRODE POSITIVE, BATTERIE SECONDAIRE ET DISPOSITIF
(ZH) 正极集流体、正极极片、二次电池及装置
Abstract
(EN)
A positive current collector (10), a positive electrode plate (20), a secondary battery (5), and a device, the positive current collector (10) comprising: a support layer (101), provided with two opposing surfaces (101a, 101b) in the width direction thereof; and a conductive layer (102), arranged on at least one of the two surfaces (101a, 101b) of the support layer (101). The width D1 of the conductive layer (102) satisfies 300 nm ≤ D1 ≤ 2μm. When the tensile strain of the positive current collector (10) is 1.5%, the rate of increase of the sheet resistance of the conductive layer (102) is T ≤ 30%. The present positive current collector (10) is able to simultaneously maintain high safety performance and high electrical performance, and thus a positive electrode plate (20) and a secondary battery (5) using said collector can be used to simultaneously maintain high safety performance and high electro-chemical performance.
(FR)
La présente invention concerne un collecteur de courant positif (10), une plaque d'électrode positive (20), une batterie secondaire (5), et un dispositif, le collecteur de courant positif (10) comprenant : une couche de support (101), pourvue de deux surfaces opposées (101a, 101b) dans le sens de la largeur de celle-ci ; et une couche conductrice (102), disposée sur au moins l'une des deux surfaces (101a, 101b) de la couche de support (101). La largeur D1 de la couche conductrice (102) satisfait à 300 nm ≤ D1 ≤ 2 µm. Lorsque la contrainte de traction du collecteur de courant positif (10) est de 1,5 %, le taux d'augmentation de la résistance de feuille de la couche conductrice (102) est T ≤ 30 %. Le présent collecteur de courant positif (10) peut simultanément maintenir une performance de sécurité élevée et une performance électrique élevée, et ainsi une plaque d'électrode positive (20) et une batterie secondaire (5) utilisant ledit collecteur peuvent être utilisées pour maintenir simultanément une performance de sécurité élevée et une performance électro-chimique élevée.
(ZH)
一种正极集流体(10)、正极极片(20)、二次电池(5)及装置,正极集流体(10)包括:支撑层(101),在自身厚度方向上具有相对的两个表面(101a,101b);导电层(102),设置于所述支撑层(101)的两个所述表面(101a,101b)中的至少一者上;其中,所述导电层(102)的厚度D1满足300nm≤D1≤2μm;所述正极集流体(10)的拉伸应变为1.5%时,所述导电层(102)的方块电阻增长率T≤30%。该正极集流体(10)能够同时兼顾较高的安全性能及电性能,从而能够使采用其的正极极片(20)及二次电池(5)同时兼顾较高的安全性能及电化学性能。
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