Title:
SOLID-STATE LITHIUM BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/071551
Kind Code:
A1
Abstract:
The present invention relates to the technical field of solid-state lithium batteries, and specifically relates to a solid-state lithium battery, which comprises a positive electrode, a negative electrode and a polymer solid-state electrolyte located between the positive electrode and the negative electrode. The polymer solid-state electrolyte comprises a polymer, the positive electrode comprises a positive electrode material layer, and the positive electrode material layer comprises a positive electrode active substance and a compound as shown in a structural formula 1. The solid-state lithium battery satisfies the following conditions: 5≤uL/wd≤500; u being a mass percentage of the polymer in the total mass of the polymer solid-state electrolyte, and the unit being %; w being the mass percentage of the compound shown in structural formula 1 in total the mass of the positive electrode active material, the unit being %; L being the thickness of the positive electrode material layer, the unit being μm; and D being the thickness of the polymer solid-state electrolyte, the unit being μm. The positive electrode used in the solid-state lithium battery of the present invention is doped with an unsaturated phosphate compound, decreasing the probability that an end group of a polymer macromolecular chain is broken due to attack, and improving the cycle stability of the solid-state lithium battery.
Inventors:
DENG YONGHONG (CN)
LIU ZHONGBO (CN)
AO XIAOHU (CN)
WANG MAN (CN)
LIU ZHONGBO (CN)
AO XIAOHU (CN)
WANG MAN (CN)
Application Number:
PCT/CN2022/117985
Publication Date:
May 04, 2023
Filing Date:
September 09, 2022
Export Citation:
Assignee:
SHENZHEN CAPCHEM TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/62; H01M10/052; H01M10/0565
Foreign References:
| CN114023965A | 2022-02-08 | |||
| CN106898827A | 2017-06-27 | |||
| CN104584289A | 2015-04-29 | |||
| CN108539122A | 2018-09-14 | |||
| CN106571446A | 2017-04-19 |
Attorney, Agent or Firm:
SHENZHEN GHZF INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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