Search International and National Patent Collections

1. (WO2018221346) LITHIUM ION SECONDARY CELL

Pub. No.:    WO/2018/221346    International Application No.:    PCT/JP2018/019826
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Thu May 24 01:59:59 CEST 2018
IPC: H01M 10/0568
H01M 4/38
H01M 4/48
H01M 4/505
H01M 4/525
H01M 10/052
H01M 10/0569
H01M 10/0585
Applicants: NEC CORPORATION
日本電気株式会社
Inventors: NOGUCHI, Takehiro
野口 健宏
HASEGAWA, Takuya
長谷川 卓哉
SHIMANUKI, Ikiko
島貫 伊紀子
KAWASAKI, Daisuke
川崎 大輔
Title: LITHIUM ION SECONDARY CELL
Abstract:
Provided is a lithium ion secondary cell having high energy density and exceptional cycle characteristics. The present invention pertains to a lithium ion secondary cell comprising: a negative-electrode active material that includes a material including silicon as a constituent element; and an electrolyte. The electrolyte contains: a non-aqueous solvent including a fluorinated ether compound, an acyclic sulfone compound, and a cyclic carbonate compound; and a supporting electrolyte that includes LiPF6, lithium bis(fluorosulfonyl) imide, and lithium bis(oxalate) borate (LiBOB), the LiBOB content in the electrolyte being 0.2% by mass or greater.