# US 11,444,322 B2 · Solid-state polymer electrolyte with improved processability and method for manufacturing the same

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- Number: US 11,444,322 B2
- Document ID: US11444322B2
- Status: Granted
- Kind: B2
- Application number: 16/782,074
- Filed: 2020-02-05
- Published: 2021-07-01
- Granted: 2022-09-13
- Earliest claimed: 2019-12-27
- Assignees: Korea Institute of Energy Research
- Applicants: Korea Institute of Energy Research
- Inventors: Jung Hyun Lee; Jung Joon Yoo; Jeong Gu Yeo
- Web page: https://patentgrep.com/patent/US11444322B2

## CPC

- H01G 11/56: Solid electrolytes, e.g. gels; Additives therein
- H01M 10/0565: Polymeric materials, e.g. gel-type or solid-type
- H01G 11/84: Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G 11/62: characterised by the solute, e.g. salts, anions or cations therein
- H01M 2300/0082: Organic polymers
- H01M 2300/0085: Immobilising or gelification of electrolyte
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

## Abstract

The present disclosure relates to a solid-state polymer electrolyte with improved processability and a method for manufacturing the same, and more particularly to a solid electrolyte containing a polymer obtained by pertaining polymerization of a zwitterionic monomer in a solvent-free ionic liquid.

## Claims

### Claim 1

A method for manufacturing a solid electrolyte, the method comprising:
mixing sulfobetaine methacrylate with an ionic liquid; and
polymerizing the sulfobetaine methacrylate in the ionic liquid; wherein the sulfobetaine methacrylate and the ionic liquid are mixed at a weight ratio of 1:0.3 to 1:2,
wherein the ionic liquid is 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide.

### Claim 2 (depends on 1)

The method of claim 1, wherein no solvent is added in the mixing the sulfobetaine methacrylate and the ionic liquid.

### Claim 3 (depends on 1)

The method of claim 1, further comprising applying the mixed sulfobetaine methacrylate and ionic liquid to an object prior to the polymerizing of the mixture.

### Claim 4

A solid electrolyte comprising
a polymer obtained by a polymerization of a sulfobetaine methacrylate and an ionic liquid in the absence of solvent, wherein a weight ratio of the polymer to the ionic liquid is 1:0.3 to 1:2, and there is no solvent in the solid electrolyte, and the solid electrolyte is present in a supercapacitor; and
wherein the ionic liquid is 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide.

### Claim 5 (depends on 4)

A supercapacitor comprising the solid electrolyte of claim 4.