Fully biodegradable supercapacitor and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-10984965-B2
Application number	US-201716476572-A
Country	US
Kind code	B2
Filing date	Dec 20, 2017
Priority date	Jan 11, 2017
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

The present description relates to a fully biodegradable supercapacitor and a method for manufacturing the same. When the fully biodegradable supercapacitor and the method for manufacturing the same according to the present description are used, supercapacitor having high capacitance, high energy, and high output is provided by forming a metal oxide on a metal electrode and a surface of a solid electrolyte. In addition, the present description is environment-friendly, biodegradable, and biocompatible to be implanted into a body, and may be a bio-implantable energy storage device in the future.

First claim

What is claimed is:

1. A supercapacitor comprising:
a flexible substrate comprising a biodegradable polymer;
a metal electrode layer comprising a biodegradable metal disposed on the flexible substrate; and
a biodegradable solid electrolyte layer disposed on the metal electrode layer,
wherein a metal oxide layer is disposed between the metal electrode layer and the biodegradable solid electrolyte layer.

2. The supercapacitor of claim 1 , wherein the biodegradable metal comprises one or more selected from the group consisting of tungsten, iron, magnesium, zinc, and molybdenum.

3. The supercapacitor of claim 1 , wherein the metal oxide layer is disposed as the biodegradable metal of the metal electrode layer is electrochemically corroded.

4. The supercapacitor of claim 1 , wherein the biodegradable polymer comprises one or more selected from the group consisting of polylactic acid-glycolic acid copolymer, bio-cellulose, polyglycolic acid, polylactic acid, poly-ϵ-caprolactone, polyamino acid, polyanhydride, polyorthoesters, and their derivatives and copolymer.

5. The supercapacitor of claim 1 , wherein the biodegradable solid electrolyte layer comprises one or more selected from group consisting of agarose, polyvinyl alcohol, and polyethylene oxide.

6. The supercapacitor of claim 1 , further comprising a biodegradable encapsulant covering the flexible substrate, the metal electrode layer, and the biodegradable solid electrolyte layer.

7. A method for manufacturing a supercapacitor comprising:
forming a metal electrode layer;
disposing the metal electrode layer on a flexible substrate comprising a biodegradable polymer;
disposing a biodegradable solid electrolyte layer on the metal electrode layer to form a structure; and
forming a metal oxide layer between the metal electrode layer and the biodegradable solid electrolyte layer by applying electricity to the structure.

8. The method for manufacturing the supercapacitor of claim 7 ,
wherein disposing the biodegradable solid electrolyte layer further comprises:
forming a mixture by mixing sodium chloride with one or more selected from the group consisting of agarose, polyvinyl alcohol and polyethylene oxide, and
stacking the mixture on the metal electrode layer.

Assignees

• Univ Korea Res & Bus Found

Inventors

• Ha Jeong Sook
• Lee Geumbee
• Jeong Yu Ra

Classifications

• H01G11/54

  Electrolytes · CPC title

• H01G11/46 Primary

  Metal oxides · CPC title

• C08L5/12

  {Agar or} agar-agar {, i.e. mixture of agarose and agaropectin}; Derivatives thereof · CPC title

• C08L71/02

  Polyalkylene oxides · CPC title

• H01G11/84

  Processes for the manufacture of hybrid or EDL capacitors, or components thereof · CPC title