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:
Dec. 25, 1990
Filed:
Jul. 12, 1989
Michael M Thackeray, Pretoria, ZA;
Annemare De Kock, Pretoria, ZA;
CSIR, Pretoria, ZA;
Abstract
A method of synthesizing a lithium manganese oxide in accordance with the formula Li.sub.1-x Mn.sub.2 O.sub.4 in which 0.ltoreq.x<1 and having a spinel-type crystal structure includes forming a mixture in finely divided solid form of at least one lithium salt such as Li.sub.2 CO.sub.3 which decomposes when heated in air to form an oxide of lithium, and at least one manganese salt such as MnCO.sub.3 which decomposes when heated in air to form an oxide of manganese. The mixture is heated in an oxidizing atmosphere to a temperature in the range 200.degree.-600.degree. C. to decompose the salts and to obtain the Li.sub.1-x Mn.sub.2 O.sub.4 having a spinel-type crystal structure.