Xin Zhao

US Patent:

7852612, Dec 14, 2010

Filed:

Oct 25, 2007

Appl. No.:

11/976574

Inventors:

Xin Zhao - Williamsburg VA, US

Assignee:

College of William and Mary - Williamsburg VA

International Classification:

H01G 9/00
H01B 1/04

US Classification:

361502, 252502

Abstract:

A supercapacitor comprises a first electrode, a second electrode, and a separator. The electrodes are created with carbon nanosheets in various configurations. For example, the carbon nanosheets may be disposed orthogonal to a surface to which it is attached and comprise a single graphene layer or multiple graphene layers. The electrodes are impregnated with an electrolyte.

US Patent:

8153240, Apr 10, 2012

Filed:

Oct 4, 2004

Appl. No.:

10/574507

Inventors:

Jianjun Wang - Williamsburg VA, US
Mingyao Zhu - Williamsburg VA, US
Brian C. Holloway - Williamsburg VA, US
Ronald A. Outlaw - Williamsburg VA, US
Dennis M. Manos - Williamsburg VA, US
Xin Zhao - Williamsburg VA, US

Assignee:

College of William and Mary - Williamsburg VA

International Classification:

B32B 7/02
B32B 27/32
B32B 5/16
B32B 9/00
B32B 15/02
B32B 17/02
B32B 19/00
B32B 21/02
B32B 23/02
B32B 27/02

US Classification:

428215, 428220, 428402, 977755

Abstract:

Carbon nanoflakes, methods of making the nanoflakes, and applications of the carbon nanoflakes are provided. In some embodiments, the carbon nanoflakes are carbon nanosheets, which are less than 2 nm thick. The carbon nanoflakes may be made using RF-PECVD. Carbon nanoflakes may be useful as field emitters, for hydrogen storage applications, for sensors, and as catalyst supports.

US Patent:

20190376928, Dec 12, 2019

Filed:

Jun 11, 2018

Appl. No.:

16/005150

Inventors:

Wei Zheng - Williamsburg VA, US
Xin Zhao - North Potomac MD, US

International Classification:

G01N 27/42

Abstract:

This disclosure is about invention of electrodes for electrochemical stripping analysis comprising vertically free standing graphene containing Carbon Nanosheets, which is a novel material being distinctly different from graphite, planer graphene, carbon nanotubes, carbon nanowalls, carbon nanoflakes, graphene nanoplatelets, aggregated graphene powders made of exfoliated graphite flakes etc. Performance enhancement effects of electrodes are achieved by unique structure, morphology, topography and crystal defects of vertically free standing graphene containing Carbon Nanosheets: large surface area, exceptional electrical conductivity, good mechanical strength and edge effects. An enhanced electrical conductivity and surface area of electrodes can yield high signal level in electrochemical stripping analysis. More over, vertically free standing graphene containing Carbon Nanosheets can carrier more target substance-to-be-analyzed, catalyst particles, or additives due to the large surface area, high density of graphene edges and large number of actived atomistic sites of vertically free standing graphene containing Carbon Nanosheets.

US Patent:

20170170486, Jun 15, 2017

Filed:

Dec 9, 2016

Appl. No.:

15/374712

Inventors:

Wei Zheng - Williamsburg VA, US
Xin Zhao - North Potomac MD, US

International Classification:

H01M 4/92
H01M 4/96
H01M 4/86

Abstract:

This disclosure is about invention of fuel cells comprising vertically free-standing graphene and carbon nanosheets in the components, and methods of making thereof. Performance enhancement effect of the fuel cell is achieved by using: an electrically conducting component whose surface is covered by vertically free-standing graphene and carbon nanosheets; and/or a catalyst supporting structure made of vertically free-standing graphene and carbon nanosheets; and/or a catalyst based on vertically free-standing graphene and carbon nanosheets. Layers of fuel cells embedded with vertically free-standing graphene and carbon nanosheets can be mechanically strengthened. Vertically free-standing graphene and carbon nanosheets embedded in the electrodes can also enhance the electrical conductivity.

US Patent:

20160226061, Aug 4, 2016

Filed:

Feb 4, 2015

Appl. No.:

14/613617

Inventors:

- Yorktown VA, US
Xin ZHAO - Yorktown VA, US

International Classification:

H01M 4/36
H01M 4/583

Abstract:

A graphene-based battery includes an anode, a cathode and an electrolyte. The electrodes of anode and cathode include vertically free-standing graphene, carbon nanosheets, and/or three-dimensional (3D) carbon nanostructures in various configurations. For example, the carbon nanosheets are disposed orthogonally to a surface, and include a single layer or multiple layers of graphene. The vertically free-standing carbon nanosheets are coated with an active material as the cathode. A liquid, gel or solid-state electrolyte is either pseudo-morphologically coated on the surface of free-standing carbon nanosheets, or fully impregnates the space between the free-standing carbon nanosheets. Essentially, the vertically free-standing carbon nanosheets function as space-organizers at nanoscale. By partitioning the space between the anode and the cathode, the vertically free-standing carbon nanosheets can greatly enlarge the surface area of the loaded active material, and provide utterly high electrical conductivity, by virtue of physical properties of graphene.