Title:
ELECTROLYTE SOLUTION, LITHIUM-SULFUR SECONDARY BATTERY, AND MODULE
Document Type and Number:
WIPO Patent Application WO/2020/246578
Kind Code:
A1
Abstract:
Provided are an electrolyte solution that makes it possible to improve output characteristics and capacity retention, a lithium-sulfur secondary battery that comprises the electrolyte solution, and a module. An electrolyte solution that is for use in a battery that has a positive electrode or a negative electrode that contains a sulfur-based electrode active material that includes one substance selected from the group that consists of elemental sulfur, lithium polysulfides (Li2Sn, 1≤n≤8), and organic sulfur compounds. The electrolyte solution includes: a fluorinated ether that is represented by formula (1) (Rf-(OR1)n-O-R2, in which Rf is an alkyl group that includes a fluorine atom and may form a C1–5 branch or ring, the R1s are an alkyl group that may include a fluorine atom, R2 is a C1–9 alkyl group that does not include fluorine and may form a branch or a ring, n is 0, 1, or 2, and there are at least 5 carbons per molecule); an ether compound that is represented by formula (2) (R4-(OCHR3CH2)x-OR5, in which R4 and R5 may together form a ring but are each independently selected from the group that consists of C1–9 alkyl groups that do not include fluorine, phenyl groups that may be substituted with a halogen atom, and cyclohexyl groups that may be substituted with a halogen atom, the R3s are each independently H or CH3, and x is 0–10); and an alkali metal salt.
Inventors:
HIDAKA TOMOYA (JP)
KUWAJIMA YOSHIKO (JP)
YAMAZAKI SHIGEAKI (JP)
KUWAJIMA YOSHIKO (JP)
YAMAZAKI SHIGEAKI (JP)
Application Number:
PCT/JP2020/022276
Publication Date:
December 10, 2020
Filing Date:
June 05, 2020
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
H01M4/134; H01M4/38; H01M10/052; H01M10/0568; H01M10/0569
Domestic Patent References:
| WO2018163778A1 | 2018-09-13 |
Foreign References:
| JP2018067501A | 2018-04-26 | |||
| JP2011187163A | 2011-09-22 | |||
| JP2019507482A | 2019-03-14 | |||
| KR20180117868A | 2018-10-30 | |||
| JP2018106979A | 2018-07-05 | |||
| JP2014041811A | 2014-03-06 | |||
| JP2013225496A | 2013-10-31 | |||
| JP2014041811A | 2014-03-06 | |||
| JPS584557B2 | 1983-01-26 | |||
| JP2005108724A | 2005-04-21 |
Other References:
ELECTROCHIMICA ACTA, vol. 161, 2015, pages 55 - 62
See also references of EP 3982442A4
See also references of EP 3982442A4
Attorney, Agent or Firm:
TASS MEISTER PATENT FIRM (JP)
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