Nonaqueous electrolyte, nonaqueous electrolyte secondary battery, and energy device

Patent metadata

Field	Value
Publication number	US-2020220222-A1
Application number	US-202016824891-A
Country	US
Kind code	A1
Filing date	Mar 20, 2020
Priority date	Sep 22, 2017
Publication date	Jul 9, 2020
Grant date	—

Abstract

Provided is a nonaqueous electrolyte secondary battery including: a positive electrode; a negative electrode; and a nonaqueous electrolyte solution, wherein the positive electrode includes a metal oxide represented by the following composition formula (14): Li a101 Ni b101 Co c101 M d101 O 2 (14), where a101, b101, c101 and d101 represent numerical values of 0.90≤a101≤1.10, 0.50≤b101≤0.98, 0.01≤c101<0.50 and 0.01≤d101<0.50, satisfying b101+c101+d101=1; and M represents at least one element selected from the group consisting of Mn, Al, Mg, Zr, Fe, Ti, and Er, and the nonaqueous electrolyte solution includes a compound represented by the following Formula (C):

where R 101 to R 103 each independently represent a C 1-10 alkyl group optionally having a substituent, or a C 6-18 aryl group optionally having a substituent; and X represents hydrogen, a C 2-10 alkenyl group, or a C 2-10 alkynyl group.

First claim

What is claimed is:

1 . A nonaqueous electrolyte secondary battery comprising:
a positive electrode; a negative electrode; and a nonaqueous electrolyte solution, wherein the positive electrode comprises a metal oxide represented by the following composition formula (14):
Li a101 Ni b101 CO c101 M d101 O 2   (14)

wherein, a101, b101, c101 and d101 represent numerical values of 0.90≤a101≤1.10, 0.50≤b101≤0.98, 0.01≤c101<0.50 and 0.01≤d101≤0.50, satisfying b101+c101+d101=1; and M represents at least one element selected from the group consisting of Mn, Al, Mg, Zr, Fe, Ti, and Er, and the nonaqueous electrolyte solution comprises a compound represented by the following Formula (C):

wherein, R 101 to R 103 each independently represent an alkyl group having 1 to 10 carbon atoms which optionally has a substituent, or an aryl group having 6 to 18 carbon atoms which optionally has a substituent; and X represents hydrogen, an alkenyl group having 2 to 10 carbon atoms, or an alkynyl group having 2 to 10 carbon atoms.

2 . The nonaqueous electrolyte secondary battery according to claim 1 , wherein the positive electrode comprises a metal oxide represented by the following composition formula (15):
Li a102 Ni b102 CO c102 M d102 O 2   (15)
wherein, a102, b102, c102 and d102 represent numerical values of 0.90≤a102≤1.10, 0.50≤b102≤0.90, 0.05≤c102≤0.30 and 0.05≤d102≤0.30, satisfying b102+c102+d102=1; and M represents at least one element selected from the group consisting of Mn, Al, Mg, Zr, Fe, Ti, and Er.

3 . The nonaqueous electrolyte secondary battery according to claim 1 , wherein the content of the compound represented by Formula (C) is 0.001% by mass to 10% by mass with respect to a total amount of the nonaqueous electrolyte solution.

4 . The nonaqueous electrolyte secondary battery according to claim 1 , wherein X in Formula (C) is a vinyl group, an allyl group, or a methallyl group.

5 . The nonaqueous electrolyte secondary battery according to claim 4 , wherein X in Formula (C) is a vinyl group.

6 . The nonaqueous electrolyte secondary battery according to claim 1 , wherein the nonaqueous electrolyte solution further comprises at least one compound selected from the group consisting of a difluorophosphate, a fluorosulfonate, and a salt having a bis-fluorosulfonylimide structure.

7 . The nonaqueous electrolyte secondary battery according to claim 6 , wherein the content of all compounds belonging to the group consisting of the difluorophosphate, the fluorosulfonate, and the salt having a bis-fluorosulfonylimide structure is 0.001% by mass to 10% by mass with respect to a total amount of the nonaqueous electrolyte solution.

Assignees

• Mitsubishi Chem Corp

Inventors

• Watarai Atsushi
• Nakazawa Eiji
• Sawa Shuhei

Classifications

• Y02T10/70

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

• H01G11/50

  specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title