# US 2017/0288264 A1 · Solid electrolyte compositions

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- Number: US 2017/0288264 A1
- Document ID: US20170288264A1
- Status: Published application
- Kind: A1
- Application number: 15/085,924
- Filed: 2016-03-30
- Published: 2017-10-05
- Earliest claimed: 2016-03-30
- Assignees: Wildcat Discovery Technologies, Inc.
- Applicants: Wildcat Discovery Technologies, Inc.
- Inventors: Bin Li; Marissa Caldwell; Prabhakar Tamirisa; Hui Ye
- Web page: https://patentgrep.com/patent/US20170288264A1

## CPC

- H01M 10/0565: Polymeric materials, e.g. gel-type or solid-type
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 2300/0028: characterised by the solvent
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A battery having an anode, a soft-solid electrolyte, and a cathode. The soft-solid electrolyte includes a polymer soft-solid material formed from polymer combined with a solvent such as butylene carbonate, butyl sulfoxide, n-methyl-2-pyrrolidone, or γ-caprolactone.

## Claims

### Claim 1

A battery, comprising:
an anode;
a cathode comprising an electrode active material; and
an electrolyte film including a lithium salt and a polymer soft-solid material, the polymer soft-solid material comprising a solvent selected from the group consisting of butylene carbonate, butyl sulfoxide, n-methyl-2-pyrrolidone, and γ-caprolactone.

### Claim 2 (depends on 1)

The battery of claim 1, wherein the solvent comprises butylene carbonate.

### Claim 3 (depends on 1)

The battery of claim 1, wherein the solvent comprises butyl sulfoxide.

### Claim 4 (depends on 1)

The battery of claim 1, wherein the solvent comprises n-methyl-2-pyrrolidone.

### Claim 5 (depends on 1)

The battery of claim 1, wherein the solvent comprises γ-caprolactone.

### Claim 6 (depends on 2)

The battery of claim 2, wherein the lithium salt comprises lithium bis(trifluoromethanesulfonyl)imide.

### Claim 7 (depends on 1)

The battery of claim 1, wherein the solvent comprises butylene carbonate and about 20 molar percent lithium bis(trifluoromethanesulfonyl)imide.

### Claim 8 (depends on 4)

The battery of claim 4, wherein the lithium salt comprises lithium bis(trifluoromethanesulfonyl)imide.

### Claim 9 (depends on 1)

The battery of claim 1, wherein the solvent comprises n-methyl-2-pyrrolidone and about 20 molar percent lithium bis(trifluoromethanesulfonyl)imide.

### Claim 10 (depends on 2)

The battery of claim 2, wherein the lithium salt comprises lithium tetrafluoroborate.

### Claim 11 (depends on 1)

The battery of claim 1, wherein the solvent comprises butylene carbonate and about 20 molar percent lithium tetrafluoroborate.

### Claim 12 (depends on 3)

The battery of claim 3, wherein the lithium salt comprises lithium tetrafluoroborate.

### Claim 13 (depends on 1)

The battery of claim 1, wherein the liquid precursor portion comprises butyl sulfoxide and about 20 molar percent lithium tetrafluoroborate.

### Claim 14

A method of making a soft-solid electrolyte, comprising:
forming a liquid precursor by suspending at least 20 molar percent of a lithium salt in a liquid solvent;
combining an ethylene oxide polymer and the liquid precursor to form a soft-solid material; and
annealing the soft-solid material.

### Claim 15 (depends on 14)

The method of claim 14 wherein the combining is done via mechanical milling.

### Claim 16 (depends on 14)

The method of claim 14 wherein the annealing is done at less than about 90 degrees Celsius.

### Claim 17 (depends on 14)

The method of claim 14 wherein the liquid precursor comprises butylene carbonate and about 20 molar percent lithium bis(trifluoromethanesulfonyl)imide.

### Claim 18 (depends on 14)

The method of claim 14 wherein the liquid precursor comprises n-methyl-2-pyrrolidone and about 20 molar percent lithium bis(trifluoromethanesulfonyl)imide.

### Claim 19 (depends on 14)

The method of claim 14 wherein the liquid precursor comprises butylene carbonate and about 20 molar percent lithium tetrafluoroborate.

### Claim 20 (depends on 14)

The method of claim 14 wherein the liquid precursor portion butyl sulfoxide and about 20 molar percent lithium tetrafluoroborate.