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1. (WO2018025621) NONAQUEOUS ELECTROLYTE SOLUTION AND LITHIUM ION SECONDARY BATTERY

Pub. No.:    WO/2018/025621    International Application No.:    PCT/JP2017/025786
Publication Date: Fri Feb 09 00:59:59 CET 2018 International Filing Date: Sat Jul 15 01:59:59 CEST 2017
IPC: H01M 10/0567
H01M 10/052
H01M 10/0568
H01M 10/0569
Applicants: NEC CORPORATION
日本電気株式会社
Inventors: MAEDA Katsumi
前田 勝美
CHENG Qian
程 騫
Title: NONAQUEOUS ELECTROLYTE SOLUTION AND LITHIUM ION SECONDARY BATTERY
Abstract:
A nonaqueous electrolyte solution which contains a nonaqueous solvent, an electrolyte, lithium difluorophosphate and a difluoroboron complex compound represented by general formula (1), and wherein the content of lithium bis(fluorosulfonyl)imide serving as a component of the electrolyte is 0-80% by mole relative to the total number of moles of the electrolyte. (In the formula, each of R1 and R2 independently represents a substituted or unsubstituted alkyl group having 1-6 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, or a substituted or unsubstituted alkoxy group; and R3 represents a hydrogen atom, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group.)