Nanowire supercapacitors and method of manufacture

Patent metadata

Field	Value
Publication number	US-10650982-B2
Application number	US-201715836338-A
Country	US
Kind code	B2
Filing date	Dec 8, 2017
Priority date	Dec 8, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A method for the fabrication of h-WO3/WS2 core/shell nanowires and their use in flexible supercapacitor applications. The novel nanowire assemblies exhibit multifold advantages desired for high-performance supercapacitors, including superior material properties and electrode design. The material design principle can be extended to other material systems, implying its great potential for a variety of energy storage devices compatible with emerging flexible and wearable technologies.

First claim

What is claimed is:

1. A supercapacitor comprising:
an array of nanowires fabricated from a metal foil, each of the nanowires of the array comprising;
a nanowire core formed by oxidizing the metal foil to form an oxidized metal foil; and
a shell surrounding the nanowire core, the shell formed by sulfurizing the oxidized metal foil of the nanowire core to form a plurality of layers of sulfurized metal foil, each of the plurality of layers separated from each other by a sub-nanometer physical gap.

2. The supercapacitor of claim 1 , wherein the metal foil is tungsten (W) foil.

3. The supercapacitor of claim 1 , wherein the metal foil is about 50 μm thick.

4. The supercapacitor of claim 1 , wherein the metal foil is flexible.

5. The supercapacitor of claim 1 , wherein the nanowire core is a one-dimensional tungsten trioxide (WO 3 ) nanowire.

6. The supercapacitor of claim 1 , wherein the nanowire core is a highly single-crystalline hexagonal tungsten trioxide (h-WO 3 ) nanowire.

7. The supercapacitor of claim 1 , wherein the nanowires of the array are substantially vertically aligned.

8. The supercapacitor of claim 1 , wherein the shell is a two-dimensional tungsten disulfide (WS 2 ) shell.

9. A supercapacitor comprising:
an array of nanowires fabricated from a tungsten (W) foil, each of the nanowires of the array comprising;
a one-dimensional hexagonal tungsten trioxide (h-WO 3 ) nanowire core; and
a two-dimensional tungsten disulfide (WS 2 ) shell surrounding the nanowire core, the shell comprising a plurality of layers, each of the plurality of layers separated from each other by a sub-nanometer physical gap.

Assignees

• Univ Central Florida Res Found Inc

Inventors

• Jung Yeonwoong
• Choudhary Nitin
• Thomas Jayan

Classifications

• H01G11/28 Primary

  arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives · CPC title

• H01G11/68

  characterised by their material · CPC title

• H01G11/86

  specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34) · CPC title

• H01G11/48

  Conductive polymers · CPC title

• H01G11/36

  Nanostructures, e.g. nanofibres, nanotubes or fullerenes · CPC title