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1. (WO2017038406) NONAQUEOUS ELECTROLYTE SOLUTION FOR BATTERIES AND LITHIUM SECONDARY BATTERY

Pub. No.:    WO/2017/038406    International Application No.:    PCT/JP2016/073432
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Wed Aug 10 01:59:59 CEST 2016
IPC: H01M 10/0567
H01M 4/587
H01M 4/66
H01M 6/16
H01M 10/052
H01M 10/058
Applicants: MITSUI CHEMICALS, INC.
三井化学株式会社
Inventors: MIYASATO, Masataka
宮里 将敬
TANAKA, Toshihiro
田中 敏弘
GOTO, Kenichi
後藤 謙一
HAYASHI, Takashi
林 剛史
Title: NONAQUEOUS ELECTROLYTE SOLUTION FOR BATTERIES AND LITHIUM SECONDARY BATTERY
Abstract:
A nonaqueous electrolyte solution for batteries, which contains an additive (X) that is composed of at least one compound selected from the group consisting of lithium monofluorophosphate, lithium difluorophosphate and sulfonic acid ester compounds represented by formula (XA), and wherein the content of elemental copper relative to the total amount of the nonaqueous electrolyte solution for batteries is 0.001 ppm by mass or more but less than 5 ppm by mass. (In formula (XA), M represents a boron atom or a phosphorus atom; X represents a halogen atom; R represents an alkylene group having 1-10 carbon atoms, a halogenated alkylene group having 1-10 carbon atoms, an arylene group having 6-20 carbon atoms or a halogenated arylene group having 6-20 carbon atoms (and these groups may contain a substituent or a heteroatom in the structures); m represents an integer of 1-3; n represents an integer of 0-4; and q represents 0 or 1.)