Invention Grant
- Patent Title: Electrolyte and secondary battery
- Patent Title (中): 电解液和二次电池
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Application No.: US14794426Application Date: 2015-07-08
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Publication No.: US09450273B2Publication Date: 2016-09-20
- Inventor: Yuko Hayakawa , Tadahiko Kubota , Masayuki Ihara
- Applicant: Sony Corporation
- Applicant Address: JP Tokyo
- Assignee: SONY CORPORATION
- Current Assignee: SONY CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Chip Law Group
- Priority: JP2009-073661 20090325
- Main IPC: H01M10/0567
- IPC: H01M10/0567 ; H01M10/0569 ; H01M4/133 ; H01M4/134 ; H01M4/1393 ; H01M4/1395 ; H01M4/36 ; H01M4/38 ; H01M4/587 ; H01M10/052 ; H01M10/0568 ; H01M4/40 ; H01M10/0525

Abstract:
Secondary batteries capable of improving cycle characteristics are provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with the electrolytic solution. The electrolytic solution contains a solvent and an electrolyte salt. The solvent contains a cyclic compound having a disulfonic acid anhydride group (—S(═O)2—O—S(═O)2—) and at least one of a nitrile compound. Compared to a case that the solvent does not contain both the cyclic compound having the disulfonic acid anhydride group and succinonitrile or a case that that the solvent contains at least one thereof, chemical stability of the electrolytic solution is improved. Thus, even if charge and discharge are repeated, electrolytic solution decomposition is inhibited.
Public/Granted literature
- US20150311566A1 ELECTROLYTE AND SECONDARY BATTERY Public/Granted day:2015-10-29
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