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. 29, 2000
Filed:
May. 30, 1997
Applicant:
Inventors:
Dinggue Xia, Beijing, CN;
Qingguo Liu, Beijing, CN;
Assignee:
Hughes Electronics Corporation, El Segundo, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G / ;
U.S. Cl.
CPC ...
423599 ; 429224 ; 42923195 ;
Abstract
A method of preparing Li.sub.x Mn.sub.2 O.sub.4 for a secondary battery includes mixing lithium nitrate, magnanese nitrate and citric acid. A complex citrate solution is formed in the substantial absence of a polyhydroxyl alcohol. The complex citrate solution is dehydrated to produce a precursor. The precursor is then heated at a substantially constant rate and then calcined to provide a spinel compound.