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1. WO2020108014 - LITHIUM ION SECONDARY BATTERY

Publication Number WO/2020/108014
Publication Date 04.06.2020
International Application No. PCT/CN2019/105730
International Filing Date 12.09.2019
IPC
H01M 4/36 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
36Selection of substances as active materials, active masses, active liquids
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 10/0567
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
056characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
0564the electrolyte being constituted of organic materials only
0566Liquid materials
0567characterised by the additives
H01M 10/4235
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
4235Safety or regulating additives or arrangements in electrodes, separators or electrolyte
H01M 2300/0025
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2300Electrolytes
0017Non-aqueous electrolytes
0025Organic electrolyte
H01M 4/364
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
36Selection of substances as active materials, active masses, active liquids
362Composites
364as mixtures
H01M 4/505
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
36Selection of substances as active materials, active masses, active liquids
48of inorganic oxides or hydroxides
50of manganese
505of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
Applicants
  • 宁德时代新能源科技股份有限公司 CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED [CN]/[CN]
Inventors
  • 李志强 LI, Zhiqiang
  • 韩昌隆 HAN, Changlong
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
201811433543.728.11.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) LITHIUM ION SECONDARY BATTERY
(FR) BATTERIE SECONDAIRE AU LITHIUM-ION
(ZH) 锂离子二次电池
Abstract
(EN)
Disclosed is a lithium ion secondary battery comprising a positive electrode piece, a negative electrode piece, a separator and an electrolyte solution, with the positive electrode piece comprising a positive electrode active material layer and the negative electrode piece comprising a negative electrode active material layer, wherein a positive electrode active material in the positive electrode active material layer includes a lithium-manganese-based positive electrode active material; and the negative electrode active material layer and/or the electrolyte solution include(s) a sulfur-containing compound, such that the sulfur-containing compound forms, at the negative electrode active material layer, a solid electrolyte interface membrane containing a sulfur element; furthermore, the mass percentage content v of the sulfur element in the negative electrode active material layer comprising the interface membrane and the mass percentage content u of manganese element in the positive electrode active material satisfy: v=0.018u+ω, where the units of u and v are both wt% and ω is 0.01-2. The lithium ion secondary battery can achieve a higher safety performance, cycle performance, and storage performance overall.
(FR)
L'invention concerne une batterie secondaire au lithium-ion comprenant une pièce d'électrode positive, une pièce d'électrode négative, un séparateur et une solution d'électrolyte. La pièce d'électrode positive comporte une couche de matériau actif d'électrode positive et la pièce d'électrode négative comprend une couche de matériau actif d'électrode négative. Un matériau actif d'électrode positive dans la couche de matériau actif d'électrode positive comprend un matériau actif d'électrode positive à base de lithium-manganèse, et la couche de matériau actif d'électrode négative et/ou la solution d'électrolyte comprennent un composé contenant du soufre, de telle sorte que le composé contenant du soufre forme, au niveau de la couche de matériau actif d'électrode négative, une membrane d'interface d'électrolyte solide contenant un élément soufre. En outre, la teneur en élément soufre en pourcentage en masse (v) dans la couche de matériau actif d'électrode négative comprenant la membrane d'interface et la teneur en pourcentage en masse (u) de l'élément manganèse dans le matériau actif d'électrode positive satisfont la condition suivante : v = 0,018 u+ω, les unités des valeurs u et v étant toutes deux des pourcentages en poids et la valeur ω étant comprise entre 0,01 et 2. La batterie secondaire au lithium-ion peut atteindre, dans l'ensemble, des performances supérieures en termes de sécurité, de cycle et de stockage.
(ZH)
一种锂离子二次电池,锂离子二次电池包括正极极片、负极极片、隔离膜和电解液,正极极片包括正极活性物质层,负极极片包括负极活性物质层,其中,所述正极活性物质层的正极活性物质包括锂锰基正极活性物质;所述负极活性物质层和/或所述电解液中包括含硫化合物,以使所述含硫化合物在所述负极活性物质层形成含硫元素的固体电解质界面膜,并使含有所述界面膜的负极活性物质层中硫元素的质量百分含量v与所述正极活性物质中锰元素的质量百分含量u之间满足:v=0.018u+ω,其中,u和v的单位均为wt%,ω为0.01~2。锂离子二次电池能同时兼顾较高的安全性能、循环性能及存储性能。
Also published as
EP2019861300
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