Title:
ELECTROLYTE SOLUTION FOR LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/130958
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an electrolyte solution for a lithium ion secondary battery, with which the quantity of a cyclic carbonate can be optimized, decomposition reactions of graphite-based anodes can be suppressed, and battery performance in low temperature regions can be improved. This electrolyte solution for a lithium ion secondary battery is characterized by containing 10-20 vol% of ethylene carbonate (EC) and/or propylene carbonate (PC) as a cyclic carbonate, 0.38-0.75 mol/L of at least one type selected from among lithium hexafluorophosphate (LiPF6), lithium fluoroborate (LiBF4) and lithium bis(oxalate) borate (LiBOB) as a first lithium salt, and a lithium imide salt, with the total quantity of the lithium imide salt and the first lithium salt being 0.5 -1.5 mol/L, and the cyclic carbonate/first lithium salt molar ratio being 3-5.
Inventors:
SASAKI HIRONORI (JP)
MIKI TAKESHI (JP)
SUZUKI SHUICHI (JP)
MIKI TAKESHI (JP)
SUZUKI SHUICHI (JP)
Application Number:
PCT/JP2018/043688
Publication Date:
July 04, 2019
Filing Date:
November 28, 2018
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
H01M10/0568; H01M10/0525; H01M10/0569
Domestic Patent References:
| WO2017217407A1 | 2017-12-21 |
Foreign References:
| JP2017084820A | 2017-05-18 | |||
| JP2015523701A | 2015-08-13 |
Attorney, Agent or Firm:
HIRAKI & ASSOCIATES (JP)
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