Patents by Inventor Daiwon Choi

Daiwon Choi 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: 9444096
    Abstract: Disclosed are embodiments of active materials for organometallic and organometallic-inorganic hybrid electrodes and particularly active materials for organometallic and organometallic-inorganic hybrid cathodes for lithium-ion batteries. In certain embodiments the organometallic material comprises a ferrocene polymer.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: September 13, 2016
    Assignee: Battelle Memorial Institute
    Inventors: Qian Huang, John P. Lemmon, Daiwon Choi, Lelia Cosimbescu
  • Patent number: 9070942
    Abstract: Nanocomposite materials comprising a metal oxide bonded to at least one graphene material. The nanocomposite materials exhibit a specific capacity of at least twice that of the metal oxide material without the graphene at a charge/discharge rate greater than about 10 C.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: June 30, 2015
    Assignees: Battelle Memorial Institute, The Trustees of Princeton University
    Inventors: Jun Liu, Ilhan A. Aksay, Daiwon Choi, Donghai Wang, Zhenguo Yang
  • Patent number: 9040200
    Abstract: A method for forming a nanocomposite material, the nanocomposite material formed thereby, and a battery made using the nanocomposite material. Metal oxide and graphene are placed in a solvent to form a suspension. The suspension is then applied to a current collector. The solvent is then evaporated to form a nanocomposite material. The nanocomposite material is then electrochemically cycled to form a nanocomposite material of at least one metal oxide in electrical communication with at least one graphene layer.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: May 26, 2015
    Assignee: Battelle Memorial Institute
    Inventors: Jun Liu, Daiwon Choi, Wendy D. Bennett, Gordon L. Graff, Yongsoon Shin
  • Patent number: 9023529
    Abstract: A crystalline nanowire and method of making a crystalline nanowire are disclosed. The method includes dissolving a first nitrate salt and a second nitrate salt in an acrylic acid aqueous solution. An initiator is added to the solution, which is then heated to form polyacrylatyes. The polyacrylates are dried and calcined. The nanowires show high reversible capacity, enhanced cycleability, and promising rate capability for a battery or capacitor.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: May 5, 2015
    Assignee: Battelle Memorial Institute
    Inventors: Jun Liu, Yuliang Cao, Lifen Xiao, Zhenguo Yang, Wei Wang, Daiwon Choi, Zimin Nie
  • Patent number: 9017867
    Abstract: Nanocomposite materials having at least two layers, each layer consisting of one metal oxide bonded to at least one graphene layer were developed. The nanocomposite materials will typically have many alternating layers of metal oxides and graphene layers, bonded in a sandwich type construction and will be incorporated into an electrochemical or energy storage device.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: April 28, 2015
    Assignees: Battelle Memorial Institute, The Trustees of Princeton University
    Inventors: Jun Liu, Ilhan A. Aksay, Daiwon Choi, Rong Kou, Zimin Nie, Donghai Wang, Zhenguo Yang
  • Patent number: 8835046
    Abstract: Nanocomposite materials having at least two layers, each layer consisting of one metal oxide bonded to at least one graphene layer were developed. The nanocomposite materials will typically have many alternating layers of metal oxides and graphene layers, bonded in a sandwich type construction and will be incorporated into an electrochemical or energy storage device.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: September 16, 2014
    Assignee: Battelle Memorial Institute
    Inventors: Jun Liu, Daiwon Choi, Rong Kou, Zimin Nie, Donghai Wang, Zhenguo Yang
  • Publication number: 20140234536
    Abstract: Modifications to the surface of an electrode and/or the surfaces of the electrode material can improve battery performance. For example, the modifications can improve the capacity, rate capability and long cycle stability of the electrode and/or may minimize undesirable catalytic effects. In one instance, metal-ion batteries can have an anode that is coated, at least in part, with a metal fluoride protection layer. The protection layer is preferably less than 100 nm in thickness. The anode material is fabricated according to methods that result in improved anode performance.
    Type: Application
    Filed: April 28, 2014
    Publication date: August 21, 2014
    Applicant: Battelle Memorial Institute
    Inventors: Wu Xu, Wei Wang, Zhenguo Yang, Jiguang Zhang, Daiwon Choi
  • Publication number: 20140212753
    Abstract: Disclosed are embodiments of active materials for organometallic and organometallic-inorganic hybrid electrodes and particularly active materials for organometallic and organometallic-inorganic hybrid cathodes for lithium-ion batteries. In certain embodiments the organometallic material comprises a ferrocene polymer.
    Type: Application
    Filed: January 29, 2014
    Publication date: July 31, 2014
    Inventors: Qian Huang, John P. Lemmon, Daiwon Choi, Lelia Cosimbescu
  • Publication number: 20140030181
    Abstract: Nanocomposite materials comprising a metal oxide bonded to at least one graphene material. The nanocomposite materials exhibit a specific capacity of at least twice that of the metal oxide material without the graphene at a charge/discharge rate greater than about 10 C.
    Type: Application
    Filed: October 1, 2013
    Publication date: January 30, 2014
    Applicants: The Trustees of Princeton University, Battelle Memorial Institute
    Inventors: Jun Liu, Ilhan A. Aksay, Daiwon Choi, Donghai Wang, Zhenguo Yang
  • Publication number: 20140023925
    Abstract: A method for forming a nanocomposite material, the nanocomposite material formed thereby, and a battery made using the nanocomposite material. Metal oxide and graphene are placed in a solvent to form a suspension. The suspension is then applied to a current collector. The solvent is then evaporated to form a nanocomposite material. The nanocomposite material is then electrochemically cycled to form a nanocomposite material of at least one metal oxide in electrical communication with at least one graphene layer.
    Type: Application
    Filed: September 27, 2013
    Publication date: January 23, 2014
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: Jun Liu, Daiwon Choi, Wendy D. Bennett, Gordon L. Graff, Yongsoon Shin
  • Patent number: 8563169
    Abstract: Nanocomposite materials having at least two layers, each layer consisting of one metal oxide bonded to at least one graphene layer were developed. The nanocomposite materials will typically have many alternating layers of metal oxides and graphene layers, bonded in a sandwich type construction and will be incorporated into an electrochemical or energy storage device.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: October 22, 2013
    Assignee: Battelle Memorial Institute
    Inventors: Jun Liu, Ilhan A. Aksay, Daiwon Choi, Rong Kou, Zimin Nie, Donghai Wang, Zhenguo Yang
  • Patent number: 8557441
    Abstract: A method for forming a nanocomposite material, the nanocomposite material formed thereby, and a battery made using the nanocomposite material. Metal oxide and graphene are placed in a solvent to form a suspension. The suspension is then applied to a current collector. The solvent is then evaporated to form a nanocomposite material. The nanocomposite material is then electrochemically cycled to form a nanocomposite material of at least one metal oxide in electrical communication with at least one graphene layer.
    Type: Grant
    Filed: October 9, 2010
    Date of Patent: October 15, 2013
    Assignee: Battelle Memorial Institute
    Inventors: Jun Liu, Daiwon Choi, Wendy D Bennett, Gordon L Graff, Yongsoon Shin
  • Patent number: 8557442
    Abstract: Nanocomposite materials comprising a metal oxide bonded to at least one graphene material. The nanocomposite materials exhibit a specific capacity of at least twice that of the metal oxide material without the graphene at a charge/discharge rate greater than about 10 C.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: October 15, 2013
    Assignees: Battelle Memorial Institute, Trustees of Princeton University
    Inventors: Jun Liu, Ilhan A. Aksay, Daiwon Choi, Donghai Wang, Zhenguo Yang
  • Patent number: 8450014
    Abstract: Lithium ion batteries having an anode comprising at least one graphene layer in electrical communication with titania to form a nanocomposite material, a cathode comprising a lithium olivine structure, and an electrolyte. The graphene layer has a carbon to oxygen ratio of between 15 to 1 and 500 to 1 and a surface area of between 400 and 2630 m2/g. The nanocomposite material has a specific capacity at least twice that of a titania material without graphene material at a charge/discharge rate greater than about 10 C. The olivine structure of the cathode of the lithium ion battery of the present invention is LiMPO4 where M is selected from the group consisting of Fe, Mn, Co, Ni and combinations thereof.
    Type: Grant
    Filed: October 9, 2010
    Date of Patent: May 28, 2013
    Assignee: Battelle Memorial Institute
    Inventors: Jun Liu, Daiwon Choi, Zhenguo Yang, Donghai Wang, Gordon L Graff, Zimin Nie, Vilayanur V Viswanathan, Jason Zhang, Wu Xu, Jin Yong Kim
  • Publication number: 20130095386
    Abstract: Modifications to the surface of an electrode and/or the surfaces of the electrode material can improve battery performance. For example, the modifications can improve the capacity, rate capability and long cycle stability of the electrode and/or may minimize undesirable catalytic effects. In one instance, metal-ion batteries can have an anode that is coated, at least in part, with a metal fluoride protection layer. The protection layer is preferably less than 100 nm in thickness.
    Type: Application
    Filed: October 12, 2011
    Publication date: April 18, 2013
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: Wu Xu, Wei Wang, Zhenguo Yang, Jiguang Zhang, Daiwon Choi
  • Publication number: 20120305165
    Abstract: Nanocomposite materials having at least two layers, each layer consisting of one metal oxide bonded to at least one graphene layer were developed. The nanocomposite materials will typically have many alternating layers of metal oxides and graphene layers, bonded in a sandwich type construction and will be incorporated into an electrochemical or energy storage device.
    Type: Application
    Filed: August 14, 2012
    Publication date: December 6, 2012
    Inventors: Jun Liu, Ilhan A. Aksay, Daiwon Choi, Rong Kou, Zimin Nie, Donghai Wang, Zhenguo Yang
  • Publication number: 20120295147
    Abstract: A crystalline nanowire and method of making a crystalline nanowire are disclosed. The method includes dissolving a first nitrate salt and a second nitrate salt in an acrylic acid aqueous solution. An initiator is added to the solution, which is then heated to form polyacrylatyes. The polyacrylates are dried and calcined. The nanowires show high reversible capacity, enhanced cycleability, and promising rate capability for a battery or capacitor.
    Type: Application
    Filed: May 18, 2012
    Publication date: November 22, 2012
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: Jun Liu, Yuliang Cao, Lifen Xiao, Zhenguo Yang, Wei Wang, Daiwon Choi, Zimin Nie
  • Publication number: 20120295096
    Abstract: Nanocomposite materials comprising a metal oxide bonded to at least one graphene material. The nanocomposite materials exhibit a specific capacity of at least twice that of the metal oxide material without the graphene at a charge/discharge rate greater than about 10 C.
    Type: Application
    Filed: July 26, 2012
    Publication date: November 22, 2012
    Inventors: Jun Liu, Ilhan A. Aksay, Daiwon Choi, Donghai Wang, Zhenguo Yang
  • Patent number: 8257867
    Abstract: Nanocomposite materials comprising a metal oxide bonded to at least one graphene material. The nanocomposite materials exhibit a specific capacity of at least twice that of the metal oxide material without the graphene at a charge/discharge rate greater than about 10C.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: September 4, 2012
    Assignee: Battelle Memorial Institute
    Inventors: Jun Liu, Ilhan A. Aksay, Daiwon Choi, Donghai Wang, Zhenguo Yang
  • Publication number: 20120164534
    Abstract: A lithium ion battery having an anode, an electrolyte, and a cathode comprising nano-structured carbon in electrical communication with LiFePO4. The cathode of the lithium ion battery of the present invention has sufficient structural stability to maintain at least 90-99 percent of the specific capacity of the cathode over 500 charge/discharge cycles.
    Type: Application
    Filed: December 28, 2010
    Publication date: June 28, 2012
    Inventors: Daiwon Choi, Jun Liu, Zhenguo Yang, Wei Wang, Gordon L. Graff