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

Patent metadata

Field	Value
Publication number	US-2020373623-A1
Application number	US-201916969795-A
Country	US
Kind code	A1
Filing date	Jan 31, 2019
Priority date	Feb 16, 2018
Publication date	Nov 26, 2020
Grant date	—

Abstract

wherein R101s are the same as or different from each other and are each a C1-C6 hydrocarbon group optionally containing an unsaturated bond, and n101 is an integer of 2 to 5, and at least one compound (11) selected from the group consisting of an oxalic acid skeleton-containing lithium compound (a), a lithium phosphate compound (b), a sulfonic acid skeleton-containing compound (c), and a phosphate/phosphite compound (d). Also disclosed in an electrochemical device including the electrolyte solution, a lithium ion secondary battery containing the electrolyte solution and a module including the electrochemical device or lithium ion secondary battery.

First claim

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

wherein R 101 s are the same as or different from each other and are each a C1-C6 hydrocarbon group optionally containing an unsaturated bond, and n101 is an integer of 2 to 5, and
at least one compound (11) selected from the group consisting of an oxalic acid skeleton-containing lithium compound (a), a lithium phosphate compound (b), a sulfonic acid skeleton-containing compound (c), and a phosphate/phosphite compound (d).

2 . The electrolyte solution according to claim 1 ,
wherein the compound (1) is present in an amount of 0.001 to 15% by mass and the compound (11) is present in an amount of 0.001 to 10% by mass, relative to the electrolyte solution.

3 . The electrolyte solution according to claim 1 ,
wherein the oxalic acid skeleton-containing lithium compound (a) is a compound represented by the following formula (11a):

wherein R a11 and R a12 are each individually a halogen atom or a C1-C3 alkyl group optionally containing a halogen atom, a substituent, or a hetero atom, or are C1-C3 alkylene groups that bind to each other to form a ring together with a boron atom and optionally contain a halogen atom, a substituent, or a hetero atom,
the lithium phosphate compound (b) is a compound represented by the following formula (11b):

wherein X b11 and X b12 are the same as or different from each other and are each —H, —F, —O, —OCN, an alkyl group optionally containing an ether bond, a fluorinated alkyl group optionally containing an ether bond, an alkoxy group optionally containing an ether bond, or a fluorinated alkoxy group optionally containing an ether bond; X b11 and X b12 optionally bind to each other to form a ring; and r is an integer of 1 to 3,
the sulfonic acid skeleton-containing compound (c) includes at least one selected from the group consisting of a cyclic sulfonate and a compound represented by the following formula (11c):

wherein X c11 is —H, —F, —Cl, an alkyl group optionally containing an ether bond, a fluorinated alkyl group optionally containing an ether bond, an alkoxy group optionally containing an ether bond, or a fluorinated alkoxy group optionally containing an ether bond, and
the phosphate/phosphite compound (d) is a compound represented by the following formula (11d):

wherein R d11 is a C1-C6 alkyl group, and n11 is 0 or 1.

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

• Kinoshita Masakazu
• Yamada Takaya
• Yamazaki Shigeaki
• Suzuki Yuuki
• Hidaka Tomoya
• Takahashi Kenzou
• Shimooka Toshiharu

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• Y02T10/70

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

• H01M10/4235

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

• H01M2300/0025

  Organic electrolyte · CPC title