The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2002
Filed:
Mar. 30, 2000
Akihisa Kajiyama, Hiroshima-ken, JP;
Tatsuya Nakamura, Hiroshima-ken, JP;
Toda Kogyo Corporation, Hiroshima, JP;
Abstract
The present invention provides a lithium nickel-layered rock salt-type oxide particle powder, a lithium cobalt-layered rock salt-type oxide particle powder or a particle powder of a solid solution of these layered rock salt-type oxides, wherein the surface of the particle is rendered hydrophobic by coating it with a coupling agent having both a hydrophobic group and a hydrophilic group. The layered rock salt-type oxide particle powder is free of an adverse effect caused by adsorbed water because of less amount of water adsorbed on the surface of the particle powder, high in electrochemical charging and discharging capacities, low in cycle deterioration, so that it is especially useful as a positive electrode active material in a lithium battery.