Nonaqueous electrolyte solution and energy device

Patent metadata

Field	Value
Publication number	US-12469878-B2
Application number	US-202217584697-A
Country	US
Kind code	B2
Filing date	Jan 26, 2022
Priority date	Jul 31, 2019
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

Provided is a nonaqueous electrolyte solution which can provide an energy device in which the initial discharge resistance is reduced and the gas generation during storage is inhibited. This nonaqueous electrolyte solution for an energy device including a positive electrode and a negative electrode is characterized by containing a compound represented by the following Formula (1) together with an electrolyte and a nonaqueous solvent:

(wherein, X represents an optionally substituted unsaturated hydrocarbon group and at least one unsaturated carbon-carbon bond; Y represents an organic group, which is constituted by atoms selected from the group consisting of a carbon atom, a hydrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom; R 1 represents a hydrogen atom, a halogen atom, or an unsubstituted or halogen atom-substituted hydrocarbon group; R 2 represents an unsubstituted or halogen atom-substituted hydrocarbon group; and n represents an integer of 1 to 3).

First claim

The invention claimed is:

1 . A nonaqueous electrolyte solution comprising a compound represented by the following Formula (1) together with an electrolyte and a nonaqueous solvent:

wherein, X represents an optionally substituted unsaturated hydrocarbon group having 2 to 5 carbon atoms and at least one unsaturated carbon-carbon bond;
Y represents an organic group having 1 to 10 carbon atoms, which consists of atoms selected from the group consisting of a carbon atom, a hydrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom;
R 1 represents a hydrogen atom, a halogen atom, or an unsubstituted or halogen atom-substituted hydrocarbon group having 1 to 10 carbon atoms;
R 2 represents an unsubstituted or halogen atom-substituted hydrocarbon group having 1 to 10 carbon atoms;
n represents an integer of 1 to 3;
if the compound includes plural R 1 , each R 1 is the same or different from the other;
if the compound includes plural R 2 , each R 2 is the same or different from the other; and
if the compound includes plural Ys each Y is the same or different from the other,
with a proviso that R 2 and one selected from X and Y are not bound with each other to form a ring.

2 . The nonaqueous electrolyte solution according to claim 1 , wherein X comprises a group having at least one carbon-carbon double bond.

3 . The nonaqueous electrolyte solution according to claim 1 , wherein X is an aliphatic unsaturated hydrocarbon group having at least one carbon-carbon double bond.

4 . The nonaqueous electrolyte solution according to claim 1 , wherein R 1 is an alkyl group having 1 to 10 carbon atoms.

5 . The nonaqueous electrolyte solution according to claim 1 , wherein R 2 is an alkylene group having 1 to 10 carbon atoms.

6 . The nonaqueous electrolyte solution according to claim 1 , wherein Y is a hydrocarbon group or an alkylsulfonyl group having 1 to 10 carbon atoms, or an alkyloxycarbonyl group or an alkylcarbonyl group having 2 to 10 carbon atoms.

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

8 . The nonaqueous electrolyte solution according to claim 1 , wherein Y comprises the oxygen atom.

9 . The nonaqueous electrolyte solution according to claim 1 , wherein Y comprises the sulfur atom.

10 . The nonaqueous electrolyte solution according to claim 1 , wherein Y comprises, and the phosphorus atom.

11 . The nonaqueous electrolyte solution according to claim 6 , wherein Y is the hydrocarbon group having 1 to 10 carbon atoms.

12 . The nonaqueous electrolyte solution according to claim 6 , wherein Y is the alkylsulfonyl group having 1 to 10 carbon atoms.

13 . The nonaqueous electrolyte solution according to claim 6 , wherein Y is the alkyloxycarbonyl group having 2 to 10 carbon atoms.

14 . The nonaqueous electrolyte solution according to claim 6 , wherein Y is the alkylcarbonyl group having 2 to 10 carbon atoms.

15 . The nonaqueous electrolyte solution according to claim 1 , wherein the content of the compound represented by Formula (1) is 0.001% by mass to 7% by mass with respect to a total amount of the nonaqueous electrolyte solution.

16 . The nonaqueous electrolyte solution according to claim 1 , wherein the content of the compound represented by Formula (1) is 0.001% by mass to 5% by mass with respect to a total amount of the nonaqueous electrolyte solution.

17 . The nonaqueous electrolyte solution according to claim 1 , wherein Y represents the organic group having 1 to 10 carbon atoms, which consists of atoms selected from the group consisting of a carbon atom, a hydrogen atom, an oxygen atom, and a phosphorus atom.

18 . The nonaqueous electrolyte solution according to claim 1 , wherein the compound represented by Formula (1) comprises at least one selected from the group consisting of compounds below:

19 . An energy device, comprising:
a negative electrode; a positive electrode; and the nonaqueous electrolyte solution according to claim 1 .

20 . The energy device according to claim 19 , wherein
the positive electrode comprises a positive electrode active material, and the positive electrode active material comprises a lithium-transition metal composite oxide represented by the following composition formula (3):
Li a101 Ni b101 Co c101 M d101 O 2   (3)

wherein, a101, b101, c101, and d101 represent numerical values satisfying 0.90≤a101≤1.10, 0.40≤b101≤0.98, 0.01≤c101<0.50 and 0.01≤d101<0.50, respectively, and satisfy 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.

Assignees

• Mitsubishi Chem Corp
• Mu Ionic Solutions Corp

Inventors

• Sawa Shuhei
• Nishio Koichi
• Nakamura Takeshi
• Tamai Kaho

Classifications

• H01M2300/0025

  Organic electrolyte · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M10/0525

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

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01G11/64

  characterised by additives · CPC title