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1. (WO2017022731) LITHIUM ION SECONDARY BATTERY

Pub. No.:    WO/2017/022731    International Application No.:    PCT/JP2016/072566
Publication Date: Fri Feb 10 00:59:59 CET 2017 International Filing Date: Tue Aug 02 01:59:59 CEST 2016
IPC: H01M 10/0568
H01M 4/587
H01M 10/052
Applicants: HITACHI CHEMICAL COMPANY, LTD.
日立化成株式会社
Inventors: ABE, Mie
阿部 美枝
HOSHI, Kento
星 賢匠
Title: LITHIUM ION SECONDARY BATTERY
Abstract:
A lithium ion secondary battery which comprises a positive electrode, a negative electrode, a separator and an electrolyte solution containing an electrolyte, and wherein: the negative electrode contains an easily graphitizable carbon as a negative electrode active material; the electrolyte contains lithium bis(fluorosulfonyl)imide; and the content of lithium bis(fluorosulfonyl)imide is 70% by mass or less based on the total mass of the electrolyte.