Patents by Inventor Nadine Treuil

Nadine Treuil 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).

  • Lithium and manganese double oxides for the positive electrodes of electrochemical devices, preparation thereof, and electrodes including such oxides
    Patent number: 6071647
    Abstract: The invention relates to a method of preparing an oxide of formula Li.sub.x Mn.sub.y O.sub.z, in which x lies in the range 0 to 2, y lies in the range 1 to 3, and z lies in the range 3 to 4.5, x, y, and z being such that the oxide has a composition close to LiMn.sub.2 O.sub.4. According to the invention, the method comprises the following steps:a) a polymer complex of lithium and of manganese is prepared in the form of a gel or of a xerogel by causing a reducing polymer, copolymer or polymer mixture possessing complexing functions for lithium and manganese to react in a common solvent with an oxidizing lithium salt and with an oxidizing manganese salt, and by evaporating off the solvent, partially or in full; andb) the resulting lithium and manganese polymer complex is mineralized by the explosive oxidation-reduction technique to recover fine amorphous particles of the oxide of formula Li.sub.x Mn.sub.y O.sub.z.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: June 6, 2000
    Assignee: France Telecom
    Inventors: Nadine Treuil, Josik Portier, Guy Campet, Josette Ledran, Jean-Claude Frison