ELECTROLYTE SOLUTIONS FOR RECHARGEABLE BATTERIES

• US 20170288271A1
• Filed: 09/18/2015
• Published: 10/05/2017
• Est. Priority Date: 09/19/2014
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Le, Dinh Ba
• Application Number:
  US15/511,256
• Publication Number:
  US 20170288271A1
• Time in Patent Office: Days
• 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 10/0568 characterised by the solutes
• CPC Class Codes: H01M 10/0569 characterised by the solvents
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 2300/0028 characterised by the solvent
• CPC Class Codes: H01M 2300/0037 Mixture of solvents
• CPC Class Codes: H01M 4/133 Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/134 Electrodes based on metals, Si or alloys
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An electrolyte composition includes ethyl acetate and one or more lithium salts. The ethyl acetate is present in the electrolyte composition in an amount of at least 50 volume % based on the total volume of the electrolyte composition.

Claims

1. An electroltye composition comprising:

ethyl acetate;

one or more lithium salts;

a minor solvent component comprising vinylene carbonate;

wherein the ethyl acetate is present in the electrolyte composition in an amount of at least 50 volume % based on the total volume of the electrolyte composition; and

wherein the minor solvent component is present in the electrolyte composition in an amount of up to 30 vol. % based on the total volume of the electrolyte composition.

2. The electrolyte composition of claim 1, wherein the ethyl acetate is present in the electrolyte composition in an amount of at least 75 volume % based on the total volume of the electrolyte composition.

3. The electrolyte composition of claim 1, wherein the one or more lithium salts comprise any or all of LiPF6, lithium bis(oxalato)borate, or LiN(SO₂CF₃)₂.

4. The electrolyte composition of claim 1, wherein the one or more lithium salts comprise LiPF6 and either or both of lithium bis(oxalato)borate and LiN(SO₂CF₃)₂.

8. An electrochemical cell comprising:

a positive electrode;

a negative electrode; and

an electrolyte composition according to claim 1.

9. The electrochemical cell according to claim 8, wherein the positive electrode comprises an active material, and wherein the active material of the positive electrode comprises nickel, manganese, and cobalt.

10. The electrochemical cell according to claim 8, wherein the negative electrode comprises an active material, and wherein the active material of the negative electrode comprises silicon alloy.

5. (canceled)

6. (canceled)

7. A method of making an electrolyte composition, the method comprising:

combining ethyl acetate, a minor solvent component comprising vinylene carbonate, and one or more lithium salts to form the electrolyte composition;

wherein the ethyl acetate is present in the electrolyte composition in an amount of at least 50 volume % based on the total volume of the electrolyte composition; and

wherein the minor solvent component is present in the electrolyte composition in an amount of up to 30 vol. % based on the total volume of the electrolyte composition.

11. (canceled)