Liquid electrolyte for battery

Patent metadata

Field	Value
Publication number	US-10950893-B2
Application number	US-201715421136-A
Country	US
Kind code	B2
Filing date	Jan 31, 2017
Priority date	Dec 19, 2016
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

The present disclosure relates to an electrochemical cell which may be used, for example, in a rechargeable battery based on the reversible transfer of halide anions, and a method for making an electrolyte composition for use in the same. The electrochemical cell includes a positive electrode, a negative electrode, and an electrolyte composition positioned between the two electrodes, where the electrolyte composition contains a crown ether-metal halide complex in a solvent.

First claim

What is claimed is:

1. A method of making an electrolyte composition, the method comprising:
(a) dissolving a crown ether and a metal halide in a solvent;
(b) reacting the crown ether and the metal halide to form a crown ether-metal halide complex;
(c) isolating the crown ether-metal halide complex; and
(d) adding the crown ether-metal halide complex into a non-aqueous electrolyte solution of a rechargeable battery to provide one or more halide ions in the electrolyte solution, wherein the electrolyte solution comprises at least one organic solvent.

2. The method of claim 1 , wherein the metal halide comprises a metal ion selected from the group consisting of potassium, sodium, lithium, magnesium, and calcium ions.

3. The method of claim 1 , wherein the metal halide is a metal fluoride.

4. The method of claim 1 , wherein the metal halide is potassium fluoride.

5. The method of claim 4 , wherein the crown ether is selected from the group consisting of 18-crown-6, dibenzo-18-crown-6, and 15-crown-5.

6. The method of claim 5 , wherein the crown ether is 18-crown-6.

7. The method of claim 1 , wherein the crown ether is 18-crown-6, the metal halide is potassium fluoride, the crown ether-metal halide complex is 18-crown-6 potassium fluoride complex, and the concentration of the fluoride ions dissolved in the electrolyte solution is from 0.08 to 0.20M.

8. The method of claim 1 , wherein the organic solvent is selected from the group consisting of propanenitrile, 2,6-difluoropyridine, 2-fluorobenzonitrile, N-methyl-N-propylpiperidnium bis((trifluoromethyl)sulfonyl)amide, and bis(trifluoroethyl)ether.

9. The method of claim 1 , wherein the concentration of said halide ions dissolved in the electrolyte solution is from 0.01 M to 1 M.

Assignees

• Honda Motor Co Ltd

Inventors

• Omichi Kaoru
• Brooks Christopher
• Mckenney Ryan

Classifications

• H01M10/05

  Accumulators with non-aqueous electrolyte (H01M10/39 takes precedence) · CPC title

• H01M2300/0025

  Organic electrolyte · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title