Invention Publication
- Patent Title: Secondary Battery
-
Application No.: US18010818Application Date: 2022-11-16
-
Publication No.: US20240178368A1Publication Date: 2024-05-30
- Inventor: Yonghong Deng , Yunxian Qian , Shiguang Hu , Guiyan Sun , Xiaoxia Xiang , Xionggui Lin , Chaowei Cao
- Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.
- Applicant Address: CN Shenzhen, Guangdong
- Assignee: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.
- Current Assignee: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.
- Current Assignee Address: CN Shenzhen, Guangdong
- Priority: CN 2111604228.8 2021.12.24
- International Application: PCT/CN2022/132196 2022.11.16
- Date entered country: 2022-12-16
- Main IPC: H01M4/134
- IPC: H01M4/134 ; H01M10/0567

Abstract:
The present application provides a secondary battery, including a positive electrode, a negative electrode with a negative electrode material layer, and a non-aqueous electrolyte, the negative electrode material layer comprises a negative electrode active material, and the negative electrode active material comprises a silicon-based material;
the non-aqueous electrolyte comprises a solvent, an electrolyte salt and an additive, the additives comprises a compound represented by structural formula 1;
wherein n is 0 or 1, A is selected from C or O, X is selected from
R1 and R2 are each independently selected from H,
R1 and R2 are not selected from H at the same time, and X, R1 and R2 comprise at least one sulfur atom;
the secondary battery meets the following requirements:
0
.
2
1
≤
m
*
n
*
r
S
≤
40
;
and 40%≤m≤90%, 0.05%≤n≤2%, 1.2 g/cm3≤r≤1.8 g/cm3, 5%≤S≤30%.
the non-aqueous electrolyte comprises a solvent, an electrolyte salt and an additive, the additives comprises a compound represented by structural formula 1;
wherein n is 0 or 1, A is selected from C or O, X is selected from
R1 and R2 are each independently selected from H,
R1 and R2 are not selected from H at the same time, and X, R1 and R2 comprise at least one sulfur atom;
the secondary battery meets the following requirements:
0
.
2
1
≤
m
*
n
*
r
S
≤
40
;
and 40%≤m≤90%, 0.05%≤n≤2%, 1.2 g/cm3≤r≤1.8 g/cm3, 5%≤S≤30%.
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