Electrolytic solution, electrochemical device, secondary cell, and module

Patent metadata

Field	Value
Publication number	US-2020127332-A1
Application number	US-201816626755-A
Country	US
Kind code	A1
Filing date	May 30, 2018
Priority date	Jun 30, 2017
Publication date	Apr 23, 2020
Grant date	—

Abstract

An electrolyte solution containing at least one selected from a compound (I) represented by the following formula (I) and specific compounds (II). The formula (I) is as follows:

wherein R 11 is a C2-C6 alkyl group. Also disclosed are a secondary battery containing the electrolyte solution and a module including the electrochemical device or the secondary battery.

First claim

1 . An electrolyte solution comprising:
at least one selected from the group consisting of: a compound (I) represented by the following formula (I); and at least one compound (II) selected from the group consisting of a compound (a) represented by the following formula (a), a compound (b) represented by the following formula (b), a compound (c) represented by the following formula (c), a compound (d) represented by the following formula (d), the formula (I) being:

wherein R 11 is a C2-C6 alkyl group,
the formula (a) being:

wherein R 12 and R 13 are each individually a halogen atom or a C1-C3 alkyl group optionally containing a halogen atom, a substituent, or a hetero atom, or they are C1-C3 alkylene groups which bind to each other to form a ring together with a boron atom and each of which optionally contains a halogen atom, a substituent, or a hetero atom,
the formula (b) being:

wherein Rf 11 is a C2-C6 alkyl group optionally containing a fluorine atom,
the formula (c) being:

wherein Rf 12 is a fluorine atom or a C1-C6 alkyl group optionally containing a fluorine atom,
the formula (d) being:

wherein R 14 is a fluorine atom or a C1-C3 alkyl group containing a halogen atom.

2 . The electrolyte solution according to claim 1 , further comprising a solvent.

3 . The electrolyte solution according to claim 2 ,
wherein the solvent contains at least one selected from the group consisting of a non-fluorinated saturated cyclic carbonate other than the compound (b), a fluorinated saturated cyclic carbonate other than the compound (b), a non-fluorinated acyclic carbonate, a fluorinated acyclic carbonate, a non-fluorinated acyclic ester, and a fluorinated acyclic ester.

4 . The electrolyte solution according to claim 2 ,
wherein the compound (I) is present in an amount of 0.001 to 10% by mass relative to the solvent.

5 . The electrolyte solution according to claim 2 ,
wherein the compound (II) is present in an amount of 0.001 to 10% by mass relative to the solvent.

6 . The electrolyte solution according to claim 1 ,
wherein the compound (I) is represented by the following formula:

7 . The electrolyte solution according to claim 1 , further comprising an electrolyte salt other than the compound (a).

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

9 . A secondary battery comprising the electrolyte solution according to claim 1 .

10 . A module comprising the electrochemical device according to claim 8 or the secondary battery.

11 . A module comprising the secondary battery according to claim 9 .

Assignees

• Daikin Ind Ltd

Inventors

• Hidaka Tomoya
• Takahashi Kenzou
• Kinoshita Masakazu
• Yamazaki Shigeaki

Classifications

• H01G9/035

  Liquid electrolytes, e.g. impregnating materials (H01G11/54 takes precedence) · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01G11/60

  characterised by the solvent · CPC title

• H01M10/0568

  characterised by the solutes · CPC title