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:
Aug. 15, 2000
Filed:
Sep. 26, 1997
Applicant:
Inventors:
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M / ; H01M / ;
U.S. Cl.
CPC ...
429223 ; 42923195 ; 4292311 ; 423140 ; 423594 ;
Abstract
A process of preparing a positive electrode active material for a nonaqueous secondary battery, comprising: making a buffered aqueous solution of a water-soluble lithium compound and a water-soluble nickel compound having a definite pH, reacting with oxalic acid and a water-soluble lithium compound and a water-soluble nickel compound to yield a co-precipitate of a slightly water-soluble salt of lithium and nickel in the resulting aqueous solution, followed by calcination.