Electrolytic solution, electrochemical device, lithium-ion secondary battery, and module

Patent metadata

Field	Value
Publication number	US-2021384556-A1
Application number	US-201917050165-A
Country	US
Kind code	A1
Filing date	Mar 11, 2019
Priority date	Apr 25, 2018
Publication date	Dec 9, 2021
Grant date	—

Abstract

The disclosure provides an electrolyte solution capable of improving the output characteristics of an electrochemical device at initial stage and after high-temperature storage. The electrolyte solution contains a compound represented by the following formula (1). In the formula (1), R 101 s are each individually an optionally fluorinated organic group; X 101 s are each individually a halogen atom, —R c101 , or —OR c101 , wherein R c101 is an alkyl group or an aryl group; p1 is an integer of 1 to 4; and q1 is an integer satisfying p1+q1=4.
Formula (1):

First claim

1 . An electrolyte solution comprising a compound represented by the following formula (1),
the formula (1) being:

wherein R 101 s are each individually an optionally fluorinated organic group; X 101 s are each individually a halogen atom, —R c101 , or —OR c101 , wherein R c101 is an alkyl group or an aryl group; p1 is an integer of 1 to 4; and q1 is an integer satisfying p1+q1=4.

2 . The electrolyte solution according to claim 1 ,
wherein, in the formula (1), R 101 s are each individually an optionally fluorinated alkyl group or —(SiR b120 2 ) n101 SiR a101 3 , wherein R a101 and R b101 are each individually an alkyl group or an aryl group and n101 is an integer of 0 or greater; and X 101 s are each individually a halogen atom.

3 . The electrolyte solution according to claim 1 , further comprising at least one selected from the group consisting of compounds represented by the following formulas (11-1) to (11-4),
the formula (11-1) being:

wherein R 111 and R 112 are the same as or different from each other and are each a hydrogen atom, a fluorine atom, or an alkyl group optionally containing a fluorine atom; and R 113 is an alkyl group free from a fluorine atom or an organic group containing an unsaturated carbon-carbon bond,
the formula (11-2) being:

wherein R 121 is an optionally fluorinated C1-C7 alkyl group, an optionally fluorinated C2-C8 alkenyl group, an optionally fluorinated C2-C9 alkynyl group, or an optionally fluorinated C6-C12 aryl group, and optionally contains at least one selected from the group consisting of O, Si, S, and N in a structure,
the formula (11-3) being:

wherein R 131 and R 132 are (i) each individually H, F, an optionally fluorinated C1-C7 alkyl group, an optionally fluorinated C2-C7 alkenyl group, an optionally fluorinated C2-C9 alkynyl group, or an optionally fluorinated C5-C12 aryl group, or (ii) hydrocarbon groups binding to each other to form a 5-membered or 6-membered hetero ring with a nitrogen atom; and R 131 and R 132 each optionally contain at least one selected from the group consisting of O, S, and N in a structure,
the formula (11-4) being:

wherein Rf 141 is CF 3 —, CF 2 H—, or CFH 2 —; and R 141 is an optionally fluorinated C2-C5 alkenyl group or an optionally fluorinated C2-C8 alkynyl group and optionally contains Si in a structure.

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

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

6 . A module comprising the electrochemical device according to claim 4 .

7 . A module comprising the lithium ion secondary battery according to claim 5 .

Assignees

• Daikin Ind Ltd

Inventors

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

Classifications

• 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

• H01M10/052

  Li-accumulators · CPC title

• H01G11/64

  characterised by additives · CPC title

• H01M10/4235

  Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title