Electrolyte solution, electrochemical device, lithium ion secondary battery and module

Patent metadata

Field	Value
Publication number	US-11489204-B2
Application number	US-201816497559-A
Country	US
Kind code	B2
Filing date	Jan 26, 2018
Priority date	Mar 31, 2017
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

An electrolyte solution containing a solvent. The solvent contains a compound (1) represented by the following formula (1), wherein R a , R b , R c , and R d are the same as or different from each other, and are each —H, —F, —CH 3 , or —CF 3 ; at least one of R a , R b , R c , or R d is —F or —CF 3 ; and at least one of R a , R b , R c , or R d is —CH 3 , and a compound (2) represented by the following formula (2), wherein R e is a C1-C5 linear or branched alkyl or alkoxy group optionally containing an ether bond; R f is a C1-C5 linear or branched alkyl group optionally containing an ether bond; and at least one of R e or R f contains a fluorine atom. Also disclosed is an electrochemical device including the electrolyte solution, a lithium-ion secondary battery including the electrolyte solution and a module including the electrochemical device.

First claim

The invention claimed is:

1. An electrolyte solution comprising a solvent,
the solvent containing:
a compound (1);
and
a compound (2) represented by the following formula (2):

wherein R e is a C1-C5 linear or branched alkyl or alkoxy group optionally containing an ether bond; R f is a C1-C5 linear or branched alkyl group optionally containing an ether bond; and at least one of R e or R f contains a fluorine atom; and
wherein the compound (1) includes at least one compound of any of the following formulae (1b)-(1f):

2. The electrolyte solution according to claim 1 ,
wherein the compound (1) is contained in an amount of 0.001 to 99.999% by volume relative to the solvent.

3. The electrolyte solution according to claim 1 ,
wherein the compound (2) is contained in an amount of 0.001 to 99.999% by volume relative to the solvent.

4. The electrolyte solution according to claim 1 , further comprising an electrolyte salt.

5. An electrochemical device comprising the electrolyte solution according to claim 1 .

6. A lithium-ion secondary battery comprising the electrolyte solution according to claim 1 .

7. A module comprising the electrochemical device according to claim 5 .

8. A module comprising the lithium-ion secondary battery according to claim 6 .

Assignees

• Daikin Ind Ltd

Inventors

• Yamazaki Shigeaki
• Arima Hiroyuki
• Takahashi Kenzou

Classifications

• H01M2300/0037

  Mixture of solvents · CPC title

• H01M2300/0034

  Fluorinated solvents · CPC title

• H01M10/0569 Primary

  characterised by the solvents · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title