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1. (WO2018052077) LITHIUM ION SECONDARY BATTERY

Pub. No.:    WO/2018/052077    International Application No.:    PCT/JP2017/033246
Publication Date: Fri Mar 23 00:59:59 CET 2018 International Filing Date: Fri Sep 15 01:59:59 CEST 2017
IPC: H01M 10/0525
H01M 4/131
H01M 4/62
H01M 10/0567
H01M 10/058
Applicants: NEC CORPORATION
日本電気株式会社
Inventors: TAMAI, Suguru
玉井 卓
YOSHIDA, Noboru
吉田 登
Title: LITHIUM ION SECONDARY BATTERY
Abstract:
The purpose of one embodiment of the present invention is to provide a lithium ion secondary battery which has improved cycle properties and the negative terminal of which contains silicon oxide. The present invention relates to a lithium ion secondary battery comprising: a negative terminal containing silicon oxide; and an electrolyte containing a fluorinated acid anhydride.