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1. (WO2017155021) LITHIUM ION SECONDARY BATTERY

Pub. No.:    WO/2017/155021    International Application No.:    PCT/JP2017/009429
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Fri Mar 10 00:59:59 CET 2017
IPC: H01M 4/13
H01M 4/36
H01M 4/38
H01M 4/48
H01M 4/587
H01M 10/052
H01M 10/0566
Applicants: NEC CORPORATION
日本電気株式会社
Inventors: AZAMI, Takeshi
莇 丈史
Title: LITHIUM ION SECONDARY BATTERY
Abstract:
Provided is a lithium ion secondary battery that has excellent cycle characteristics and employs a silicon material for a negative electrode. This lithium ion secondary battery is characterized by having a negative electrode that contains: plate-shaped artificial graphite that is bent, at least some of the particles having a crease on the plate surface; and a material containing silicon as a constituent element.