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

Patent metadata

Field	Value
Publication number	US-11996522-B2
Application number	US-201917054718-A
Country	US
Kind code	B2
Filing date	Mar 18, 2019
Priority date	May 14, 2018
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

An electrolyte solution containing a compound represented by formula (1) and a compound represented, for example, by formula (11-1), the formula (1) being:

wherein M 101 is P or P═O; R 101 is a group such as a C1-C11 alkylsilyloxy group; n101 is an oxidation number of M 101 minus 1 or an oxidation number of M 101 minus 3; and R 102 to R 104 are each individually a group such as a C1-C11 alkyl group; the formula (11-1) being:

wherein R 111 and R 112 are the same as or different from each other and are each an atom or group such as a hydrogen atom; and R 113 is a group such as an alkyl group free from a fluorine atom.

First claim

The invention claimed is:

1. An electrolyte solution comprising:
a compound (1) represented by the following formula (1); and
at least one compound (11) selected from the group consisting of compounds represented by the following formulas (11-1) to (11-4),
the formula (1) being:

wherein M 101 is P or P═O; R 101 is a C1-C11 alkyloxy group, a silyloxy group, a C1-C11 alkylsilyloxy group, a C1-C11 alkoxysilyloxy group, or a C6-C18 arylsilyloxy group; n101 is a number of R 101 s binding to M 101 and is an oxidation number of M 101 minus 1 or an oxidation number of M 101 minus 3; when n101 is 2 or greater, R 101 s are the same as or different from each other; and R 102 to R 104 are each individually a C1-C11 alkyl group, a C2-C11 alkenyl group, a C1-C11 alkyloxy group, or a C6-C11 aryl group,
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.

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

wherein M 101 is P or P═O.

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

• Kuwajima Yoshiko
• Hidaka Tomoya
• Kinoshita Masakazu
• Suzuki Yuuki
• Shimooka Toshiharu
• Nakamura Hisako
• Yamada Takaya
• Yamazaki Shigeaki
• Yamauchi Akiyoshi
• Hayashi Kotaro
• Yamamoto Yoshihiro
• Takahashi Kenzou

Classifications

• 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

• H01M10/0567 Primary

  characterised by the additives · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• H01M2300/0028

  characterised by the solvent · CPC title