NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

• US 20190326640A1
• Filed: 12/14/2017
• Published: 10/24/2019
• Est. Priority Date: 12/22/2016
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: Hasegawa, Masaki, Zhong, Yuanlong
• Granted Patent: US 10,991,981 B2
• Time in Patent Office: Days
• CPC Class Codes: C07D 251/34 Cyanuric or isocyanuric esters
• CPC Class Codes: C07D 319/12 not condensed with other rings
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0567 characterised by the additives
• CPC Class Codes: H01M 10/0569 characterised by the solvents
• CPC Class Codes: H01M 2004/028 Positive electrodes
• CPC Class Codes: H01M 2300/0025 Organic electrolyte
• CPC Class Codes: H01M 4/131 Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

This nonaqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode and a non-aqueous electrolyte. The non-aqueous electrolyte contains: a non-aqueous solvent that contains a fluorine-containing cyclic carbonate; an isocyanuric acid derivative such as triallyl isocyanurate; and a cyclic carboxylic acid anhydride such as diglycolic acid anhydride.

Claims

1. A non-aqueous electrolyte secondary battery comprising:

a positive electrode including a positive electrode active material that comprises a Ni-containing lithium composite oxide as a main component;

a negative electrode; and

a non-aqueous electrolyte;

wherein the non-aqueous electrolyte includes;

a non-aqueous solvent including a fluorine-containing cyclic carbonate;

an isocyanuric acid derivative represented by the formula below;

2. The non-aqueous electrolyte secondary battery according to claim 1, wherein the content of the fluorine-containing cyclic carbonate is 0.1 vol % or more and 30 vol % or less based on the total volume of the non-aqueous solvent.

3. The non-aqueous electrolyte secondary battery according to claim 1, wherein the content of the cyclic carboxylic anhydride is 0.1 mass % or more and 1.5 mass % or less based on the total mass of the non-aqueous electrolyte.

4. The non-aqueous electrolyte secondary battery according to claim 1, wherein the content of the isocyanuric acid derivative is 0.1 mass % or more and 1.5 mass % or less based on the total mass of the non-aqueous electrolyte.

5. The non-aqueous electrolyte secondary battery according to claim 1, wherein the cyclic carboxylic anhydride includes diglycolic anhydride.

6. The non-aqueous electrolyte secondary battery according to claim 1, wherein the isocyanuric acid derivative includes triallyl isocyanurate.