Title:
LITHIUM ION SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTE SOLUTION
Document Type and Number:
WIPO Patent Application WO/2023/032871
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a lithium ion secondary battery that has excellent safety during use at high temperatures, which is considered important for in-vehicle secondary batteries for electric automobiles and the like, while additionally having excellent battery characteristics such as initial capacity and high-rate charge at low temperatures. The present invention provides a lithium ion secondary battery which is provided with a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte solution that contains a nonaqueous solvent and an electrolyte salt, and which is characterized in that the nonaqueous electrolyte solution contains a pivalic acid ester having 12 to 13 carbon atoms in an amount of not less than 0.1% by volume but less than 5% by volume relative to the nonaqueous solvent, the pivalic acid ester having a flash point of 90°C or more and a viscosity of 2 to 2.3 cp at 25°C.
Inventors:
ABE KOJI (JP)
Application Number:
PCT/JP2022/032306
Publication Date:
March 09, 2023
Filing Date:
August 29, 2022
Export Citation:
Assignee:
KYOCERA CORP (JP)
International Classes:
H01M10/0567; H01M10/052; H01M10/0568; H01M10/0569
Domestic Patent References:
| WO2016017809A1 | 2016-02-04 | |||
| WO2013153814A1 | 2013-10-17 |
Foreign References:
| JP2011009230A | 2011-01-13 | |||
| JP2008243642A | 2008-10-09 | |||
| JP4691871B2 | 2011-06-01 | |||
| JP6575521B2 | 2019-09-18 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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