Patents by Inventor Xiangfeng Duan

Xiangfeng Duan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10692660
    Abstract: An electrochemical capacitor includes a pair of electrodes and an electrolyte disposed between the pair of electrodes. At least a first electrode of the pair of electrodes includes a graphene framework film, and the graphene framework film includes interconnected graphene sheets with nanopores formed in the graphene sheets.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: June 23, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Yuxi Xu
  • Patent number: 10370774
    Abstract: A process of growing graphene includes: (1) providing a metal substrate; (2) annealing the metal substrate up to a growth temperature for an annealing time period and in the presence of a non-reducing gas; and (3) introducing a gas mixture to grow graphene over the metal substrate. The gas mixture includes a first gas and a second gas that is a carbon-containing precursor, a molar ratio of the first gas and the second gas is at least 100, and introducing the gas mixture is carried out at a pressure up to 100 mbar.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: August 6, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Hailong Zhou
  • Publication number: 20190226120
    Abstract: A manufacturing method includes: (1) providing M-M? nanowires, wherein M? is at least one sacrificial metal different from M; and (2) subjecting the M-M? nanowires to electrochemical de-alloying to form jagged M nanowires.
    Type: Application
    Filed: August 29, 2017
    Publication date: July 25, 2019
    Inventors: Xiangfeng DUAN, Yu HUANG, Mufan LI
  • Publication number: 20190190033
    Abstract: An electrode material includes a catalyst support and Pt—Ni-M-M? nanostructures affixed to the catalyst support. M is a transition metal different from Pt and Ni, and M? is a transition metal different from Pt, Ni, and M.
    Type: Application
    Filed: August 3, 2017
    Publication date: June 20, 2019
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yu HUANG, Zipeng ZHAO, Xiangfeng DUAN
  • Patent number: 10319589
    Abstract: A method of forming a thin film includes: (1) providing an ink composition including nanoplates of a layered material disposed in a liquid dispersion medium; (2) applying the ink composition over a substrate to form a coating; and (3) annealing the coating to form a thin film of the layered material over the substrate.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: June 11, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Yu Huang
  • Patent number: 10307746
    Abstract: A palladium hydride nanomaterial includes nanostructures having a chemical composition represented by the formula: My-PdxHz, where M is at least one metal different from palladium; x has a non-zero value in the range of 0 to 5; y has a value in the range of 0 to 5; and z has a non-zero value in the range of 0 to 5.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: June 4, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Yu Huang, Zipeng Zhao, Xiaoqing Huang
  • Publication number: 20190137795
    Abstract: Methods and apparatus for providing all-optically generated, on-chip propagated and high-efficiency tunable plasmons are described. The plasmon generating apparatus includes a graphene based silicon nitride waveguide (GSiNW) utilizing ‘C+L’ band light sources and detectors that take advantage of the surface 2nd nonlinearity on graphene. The optical generation is accomplished via one or more optical communication lasers through the difference-frequency generation process. The THz frequency and intensity is tunable via an external gate voltage. Using such a device the optical to THz conversion may be made at least an order of magnitude more efficient than prior THz sources, and can be used to make chip-scale room-temperature THz sources, switches, modulators and detectors based on graphene.
    Type: Application
    Filed: June 9, 2017
    Publication date: May 9, 2019
    Applicant: The Regents of the University of California
    Inventors: Chee Wei Wong, Baicheng Yao, Yuan Liu, Xiangfeng Duan
  • Publication number: 20180142114
    Abstract: A method of forming a graphene-based material includes: (1) treating a mixture including an etchant and graphene oxide sheets to yield formation of holey graphene oxide sheets; (2) dispersing the holey graphene oxide sheets in a re-dispersal solvent to yield a holey graphene oxide dispersion including the holey graphene oxide sheets; and (3) treating the holey graphene oxide dispersion under reducing conditions to yield self-assembly of the holey graphene oxide sheets into a graphene-based material.
    Type: Application
    Filed: May 26, 2016
    Publication date: May 24, 2018
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng DUAN, Yuxi XU, Yu HUANG
  • Publication number: 20180123138
    Abstract: An electrode material includes a catalyst support and Pt—Ni nanostructures affixed to the catalyst support. The Pt—Ni nanostructures are doped with at least one dopant M.
    Type: Application
    Filed: April 13, 2016
    Publication date: May 3, 2018
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yu HUANG, Xiangfeng DUAN, Xiaoqing HUANG, Zipeng ZHAO
  • Publication number: 20180090768
    Abstract: A method of forming an electrode material includes: (1) loading an electrochemically active material onto graphene sheets; (2) combining the electrochemically active material-loaded graphene sheets with holey graphene oxide sheets to form a mixture; and (3) treating the mixture under reducing conditions to form a composite including a graphene framework loaded with the electrochemically active material.
    Type: Application
    Filed: September 25, 2017
    Publication date: March 29, 2018
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng DUAN, Yu HUANG, Hongtao SUN
  • Publication number: 20180047985
    Abstract: A lithium-ion battery includes: 1) an anode; 2) a cathode; and 3) an electrolyte disposed between the anode and the cathode and including lithium ions. The anode includes a graphene framework film including interconnected graphene sheets, and the graphene framework film has a specific surface area of 600 m2g?1 or more.
    Type: Application
    Filed: March 9, 2016
    Publication date: February 15, 2018
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng DUAN, Yuxi XU
  • Publication number: 20170274363
    Abstract: A palladium hydride nanomaterial includes nanostructures having a chemical composition represented by the formula: My—PdxHz, where M is at least one metal different from palladium; x has a non-zero value in the range of 0 to 5; y has a value in the range of 0 to 5; and z has a non-zero value in the range of 0 to 5.
    Type: Application
    Filed: August 21, 2015
    Publication date: September 28, 2017
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng DUAN, Yu Huang, Zipeng Zhao, Xiaoqing Huang
  • Publication number: 20170213656
    Abstract: The present disclosure provides supercapacitors that may avoid shortcomings of current energy storage technology. Provided herein are materials and fabrication processes of such supercapacitors. In some embodiments, an electrochemical system comprising a first electrode, a second electrode, wherein at least one of the first electrode and the second electrode comprises a three dimensional porous reduced graphene oxide framework.
    Type: Application
    Filed: January 25, 2017
    Publication date: July 27, 2017
    Inventors: Xiangfeng DUAN, Yu HUANG, Benjamin PAPANDREA, Xu XU
  • Publication number: 20170194144
    Abstract: A method of forming a thin film includes: (1) providing an ink composition including nanoplates of a layered material disposed in a liquid dispersion medium; (2) applying the ink composition over a substrate to form a coating; and (3) annealing the coating to form a thin film of the nanoplates over the substrate.
    Type: Application
    Filed: September 10, 2015
    Publication date: July 6, 2017
    Inventors: Xiangfeng Duan, Yu Huang
  • Patent number: 9685559
    Abstract: A vertically stacked heterostructure device includes: (1) a substrate; and (2) vertically stacked layers disposed over the substrate and including (a) a source electrode including a layer of graphene; (b) a drain electrode; and (c) a semiconducting channel disposed between the source electrode and the drain electrode. During operation of the device, a current is configured to flow between the source electrode and the drain electrode through the semiconducting channel.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: June 20, 2017
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Woojong Yu, Yuan Liu, Yu Huang
  • Publication number: 20170033370
    Abstract: A metal-air battery includes: (1) a metal anode; (2) a cathode including a graphene membrane; and (3) an electrolyte disposed between the metal anode and the cathode, where the graphene membrane includes graphene in an amount of at least 80% by weight of the graphene membrane.
    Type: Application
    Filed: April 3, 2015
    Publication date: February 2, 2017
    Inventors: Xiangfeng Duan, Xing Zhong, Yuxi Xu
  • Publication number: 20160339154
    Abstract: Described here is a graphene-catalysts conjugate, comprising: a graphene support; a first catalyst conjugated to the graphene support; and a second catalyst conjugated to the graphene support, and the second catalyst is different from the first catalyst. In some embodiments, the first catalyst and the second catalyst correspond to a tandem catalytic system to drive a chemical transformation.
    Type: Application
    Filed: January 27, 2015
    Publication date: November 24, 2016
    Applicants: The Regents of the University of California, The Regents of the University of Michigan
    Inventors: Xiangfeng Duan, Yu Huang, Teng Xue, Mark E. Meyerhoff
  • Publication number: 20160284481
    Abstract: An electrochemical capacitor includes a pair of electrodes and an electrolyte disposed between the pair of electrodes. At least a first electrode of the pair of electrodes includes a graphene framework film, and the graphene framework film includes interconnected graphene sheets with nanopores formed in the graphene sheets.
    Type: Application
    Filed: July 30, 2014
    Publication date: September 29, 2016
    Inventors: Xiangfeng Duan, Yuxi Xu
  • Publication number: 20160164084
    Abstract: A silicide-air battery includes an anode, a cathode, and an electrolyte disposed between the anode and the cathode. The anode includes a metal silicide represented as MxSiy, where M is at least one metal selected from alkaline earth metals, transition metals, and post-transition metals.
    Type: Application
    Filed: July 24, 2014
    Publication date: June 9, 2016
    Inventors: Xiangfeng DUAN, Yu HUANG, Hua ZHANG, Xing ZHONG
  • Publication number: 20150337458
    Abstract: A process of growing graphene includes: (1) providing a metal substrate; (2) annealing the metal substrate up to a growth temperature for an annealing time period and in the presence of a non-reducing gas; and (3) introducing a gas mixture to grow graphene over the metal substrate. The gas mixture includes a first gas and a second gas that is a carbon-containing precursor, a molar ratio of the first gas and the second gas is at least 100, and introducing the gas mixture is carried out at a pressure up to 100 mbar.
    Type: Application
    Filed: January 8, 2014
    Publication date: November 26, 2015
    Inventors: Xiangfeng Duan, Hailong Zhou