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

Patent metadata

Field	Value
Publication number	US-2021005933-A1
Application number	US-201816768471-A
Country	US
Kind code	A1
Filing date	Oct 2, 2018
Priority date	Dec 1, 2017
Publication date	Jan 7, 2021
Grant date	—

Abstract

An electrolyte solution containing LiFSO 3 and a compound (1) represented by the following formula (1): LiZ, wherein Z is PF 6 , BF 4 , N(FSO 2 ) 2 , N(CF 3 SO 2 ) 2 , N(C 2 F 5 SO 2 ) 2 , PO 2 F 2 , or B(C 2 O 4 ) 2 . The electrolyte solution has a ratio [FSO 3 ]/[Z] of a molar content of FSO 3 [FSO 3 ] to a molar content of Z [Z] of 3 to 1000. 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

1 . An electrolyte solution comprising LiFSO 3 and a compound (1) represented by the following formula (1): LiZ,
wherein Z is PF 6 , BF 4 , N(FSO 2 ) 2 , N(CF 3 SO 2 ) 2 , N(C 2 F 5 SO 2 ) 2 , PO 2 F 2 , or

the electrolyte solution having a ratio [FSO 3 ]/[Z] of a molar content of FSO 3 [FSO 3 ] to a molar content of Z [Z] of 3 to 1000.

2 . The electrolyte solution according to claim 1 ,
wherein the electrolyte solution contains LiFSO 3 at a concentration of 0.01 to 5.0 mol/L.

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

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

5 . A module comprising the electrochemical device according to claim 3 .

6 . A module comprising the lithium ion secondary battery according to claim 4 .

Assignees

• Daikin Ind Ltd

Inventors

• Kinoshita Masakazu
• Suzuki Yuuki
• Yamazaki Shigeaki
• Takahashi Kenzou
• Hidaka Tomoya
• Kuwajima Yoshiko
• Yamauchi Akiyoshi
• Hayashi Kotaro

Classifications

• H01G11/06

  with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC] · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• H01G9/2004

  characterised by the electrolyte, e.g. comprising an organic electrolyte · CPC title

• H01M2300/0025

  Organic electrolyte · CPC title

• H01M10/0567

  characterised by the additives · CPC title