The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2025
Filed:
Sep. 20, 2022
Murata Manufacturing Co., Ltd., Kyoto, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A secondary battery includes: a positive electrode; a negative electrode including a negative electrode active material layer on which a film including an organic substance is formed; and an electrolytic solution including a sulfur-containing cyclic compound, a fluorinated cyclic carbonic acid ester, an unsaturated cyclic carbonic acid ester, and a multi-nitrile chain compound. According to a mass analysis of the electrolytic solution using gas chromatography-mass spectrometry, a content of the sulfur-containing cyclic compound, a content of the fluorinated cyclic carbonic acid ester, a content of the unsaturated cyclic carbonic acid ester, and a content of the multi-nitrile chain compound in the electrolytic solution each satisfy the following relation: the content of the multi-nitrile chain compound>the content of the fluorinated cyclic carbonic acid ester>the content of the sulfur-containing cyclic compound>the content of the unsaturated cyclic carbonic acid ester, and the total sum of those contents is greater than or equal to 5.0 wt % and less than or equal to 11.0 wt %.