Patents by Inventor Premkumar Senguttuvan

Premkumar Senguttuvan 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).

  • Active substance for electrode for a sodium ion battery
    Patent number: 9331333
    Abstract: The present invention relates to a negative electrode material for a sodium ion battery, and to a method for producing it. The active material of the electrode material is composed of an oxide with a structure corresponding to the layered structure of the compound Na2Ti3O7, said oxide conforming to the formula NaxTi(IV)aTi(III)bMcO7 (A), in which x denotes the number of Na+ ions inserted between the layers, per Ti3O7 structural unit, with 0<x?5; Ti(IV) and Ti(III) represent titanium in the oxidation states IV and III, respectively; M represents one or more elements selected from 3d transition metals and 4d transition metals; the values of x, a, b and c are such that the compound is electronically neutral in view of the oxidation state of the element or elements represented by M; and the ratio (a+b)/c is greater than 0.5. The electrode material is obtained by electrochemical reduction of an oxide Nax?Ti(IV)a?McO7(B).
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: May 3, 2016
    Assignees: AGENCIA ESTALAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Premkumar Senguttuvan, Rosa Maria Palacin, Jean-Marie Tarascon
  • ACTIVE SUBSTANCE FOR ELECTRODE FOR A SODIUM ION BATTERY
    Publication number: 20150295236
    Abstract: The present invention relates to a negative electrode material for a sodium ion battery, and to a method for producing it. The active material of the electrode material is composed of an oxide with a structure corresponding to the layered structure of the compound Na2Ti3O7, said oxide conforming to the formula NaxTi(IV),Ti(III)bMcO7 (A), in which x denotes the number of Na+ ions inserted between the layers, per Ti3O7 structural unit, with 0<x?5; Ti(IV) and Ti(III) represent titanium in the oxidation states IV and III, respectively; M represents one or more elements selected from 3d transition metals and 4d transition metals; the values of x, a, b and c are such that the compound is electronically neutral in view of the oxidation state of the element or elements represented by M; and the ratio (a+b)/c is greater than 0.5. The electrode material is obtained by electrochemical reduction of an oxide Nax?Ti(IV)a?McO7(B).
    Type: Application
    Filed: July 2, 2012
    Publication date: October 15, 2015
    Applicants: Universite De Picardie Jules Verne, Centre National De La Recherche Scientifque, Agencia Estalal Consejo Superior De Investigaciones Cientifcas
    Inventors: Premkumar Senguttuvan, Rosa Maria Palacin, Jean-Marie Tarascon