Patents by Inventor Denis Yu

Denis Yu 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: 11626585
    Abstract: A method of preparing an electrode material includes heating a substrate with a bonding agent to form a self-assembled monolayer-containing material; and depositing a polymer coating onto the self-assembled monolayer-containing material under an elevated temperature to form a layered material. An electrode material and an electrode incorporating the electrode material is also provided.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: April 11, 2023
    Assignee: City University of Hong Kong
    Inventors: Yau Wai Denis Yu, Pui Kit Lee, Tian Tan
  • Patent number: 11165091
    Abstract: A battery system includes a positive electrode having a first material arranged to undergo chemical reaction during charging and/or discharging of the battery, a negative electrode having a second material arranged to undergo chemical reaction during charging and/or discharging of the battery, a separator disposed between the positive electrode and the negative electrode; and an electrolyte having a charge carrier, wherein the charge carrier is arranged to facilitate the chemical reaction of the first material during charging and/or discharging of the battery.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: November 2, 2021
    Assignee: City University of Hong Kong
    Inventors: Yau Wai Denis Yu, Huimin Wang
  • Publication number: 20210234152
    Abstract: A material for use in a battery includes an active material arranged to undergo chemical reaction during charging and/or discharging of battery, and one or more metal atoms arranged to hold and inactivate one or more oxygen atoms of the active material during the charging and/or discharging of the battery.
    Type: Application
    Filed: January 29, 2020
    Publication date: July 29, 2021
    Inventors: Yau Wai Denis Yu, Pui Kit Lee, Tian Tan
  • Patent number: 10910645
    Abstract: There is provided a compound for use as material in cathode of a battery. The compound has i) at least sodium or ii) sodium and lithium as a first ingredient, copper as a second ingredient, at least a first transition metal in a third ingredient (M) selected from a group including manganese, nickel, iron, copper, zinc, chromium, vanadium, titanium, molybdenum and tungsten, niobium; and oxygen as a fourth ingredient; and wherein the compound has a chemical formula of NayCuxM1-xO2, or LiaNabCuxM1-xO2.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: February 2, 2021
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Yau Wai Denis Yu, Wenpei Kang, Chun Sing Lee
  • Publication number: 20200112020
    Abstract: A method of preparing an electrode material includes heating a substrate with a bonding agent to form a self-assembled monolayer-containing material; and depositing a polymer coating onto the self-assembled monolayer-containing material under an elevated temperature to form a layered material. An electrode material and an electrode incorporating the electrode material is also provided.
    Type: Application
    Filed: October 9, 2018
    Publication date: April 9, 2020
    Inventors: Yau Wai Denis Yu, Pui Kit Lee, Tian Tan
  • Publication number: 20190229363
    Abstract: A battery system includes a positive electrode having a first material arranged to undergo chemical reaction during charging and/or discharging of the battery, a negative electrode having a second material arranged to undergo chemical reaction during charging and/or discharging of the battery, a separator disposed between the positive electrode and the negative electrode; and an electrolyte having a charge carrier, wherein the charge carrier is arranged to facilitate the chemical reaction of the first material during charging and/or discharging of the battery.
    Type: Application
    Filed: January 23, 2018
    Publication date: July 25, 2019
    Inventors: Yau Wai Denis Yu, Huimin Wang
  • Patent number: 9755227
    Abstract: The invention relates to anode materials suitable for use in batteries, such as lithium ion batteries and sodium ion batteries. In particular, the anode material is a reduced graphene oxide/metal sulfide composite. Methods for forming the reduced graphene oxide/metal sulfide composite are also disclosed.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: September 5, 2017
    Assignees: Nanyang Technological University, Yissum Research Development Company of the Hebrew University of Jerusalem Ltd.
    Inventors: Yau Wai Denis Yu, Sudip Kumar Batabyal, Ovadia Lev, Jenny Gun, Petr V. Prikhodchenko
  • Publication number: 20170104217
    Abstract: A material for use in a battery includes an active material arranged to undergo chemical reaction during charging and/or discharging of the battery, and a coating material coated on the active material, wherein the coating material is arranged to prevent the active material from cracking during charging and/or discharging of the battery.
    Type: Application
    Filed: October 7, 2015
    Publication date: April 13, 2017
    Inventors: Yau Wai Denis YU, Yingshun LI
  • Publication number: 20170077500
    Abstract: There is provided a compound for use as material in cathode of a battery. The compound has i) at least sodium or ii) sodium and lithium as a first ingredient, copper as a second ingredient, at least a first transition metal in a third ingredient (M) selected from a group including manganese, nickel, iron, copper, zinc, chromium, vanadium, titanium, molybdenum and tungsten, niobium; and oxygen as a fourth ingredient; and wherein the compound has a chemical formula of NayCuxM1-xO2, or LiaNabCuxMi-xO2.
    Type: Application
    Filed: September 14, 2015
    Publication date: March 16, 2017
    Applicant: City University of Hong Kong
    Inventors: Yau Wai Denis YU, Wenpei KANG, Chun Sing LEE
  • Publication number: 20150318544
    Abstract: The invention relates to anode materials suitable for use in batteries, such as lithium ion batteries and sodium ion batteries. In particular, the anode material is a reduced graphene oxide/metal sulfide composite. Methods for forming the reduced graphene oxide/metal sulfide composite are also disclosed.
    Type: Application
    Filed: November 15, 2013
    Publication date: November 5, 2015
    Inventors: Yau Wai Denis Yu, Sudip Kumar Batabyal, Ovadia Lev, Jenny Gun, Petr V. Prikhodchenko
  • Publication number: 20130273429
    Abstract: In nonaqueous electrolyte secondary batteries whose positive electrode includes a positive electrode active material containing a lithium-excess transition metal oxide, the charge-discharge cycle characteristics are improved. The positive electrode active material contains a first active material represented by general formula LiCoxM1?xO2 (0.3?x?0.7, M is at least one transition metal element and includes at least Ni or Mn) and a second active material represented by general formula Li1+yMn1?y?zA2O<y<0.4, 0<z<0.6, A is at least one transition metal element and includes at least Ni or Co).
    Type: Application
    Filed: February 28, 2012
    Publication date: October 17, 2013
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventor: Denis Yu
  • Publication number: 20090286159
    Abstract: The present invention relates to a positive electrode for a rechargeable lithium ion battery comprised of single particles containing a compound of the formula LiMPCU, whereby M is a metal selected from the group consisting of Co, Ni, Mn, Fe, Ti or combinations thereof, and whereby in a X-Ray diffraction chart of the electrode the ratio of the intensity I1:I2 of two selected peaks (1) and (2) is larger than (9:1) and wherein I1 represents essentially the intensity of peak (1) assigned to the (020) plane and I2 represents the intensity of peak (2) assigned to the (301) plane. The invention relates further to a process for the manufacture of such a positive electrode and to a battery comprising such an electrode.
    Type: Application
    Filed: May 11, 2006
    Publication date: November 19, 2009
    Inventors: Gerhard Nuspl, Christian Vogler, Denis Yu, Kazunori Donoue, Takao Inoue, Christopher Fietzek, Wolfgang Weydanz
  • Publication number: 20060014076
    Abstract: A non-aqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode comprises a positive electrode mixture and a current collector, wherein the positive electrode mixture has a positive electrode active material, a binder, and a conducting agent. A lithium-containing compound having an olivine structure is used as the positive electrode active material. A copolymer of polyvinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene is used as the binder. Conducting carbon powder may be used as the conducting agent. Lithium metal may be used as the negative electrode. A non-aqueous solvent in which an electrolytic salt is dissolved may be used as the non-aqueous electrolyte.
    Type: Application
    Filed: July 15, 2005
    Publication date: January 19, 2006
    Inventors: Kazunori Donoue, Takao Inoue, Denis Yu, Masahisa Fujimoto