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:
Sep. 30, 1997
Filed:
Jan. 11, 1996
Masaki Okada, Tokuyama, JP;
Takashi Mouri, Hikari, JP;
Tosoh Corporation, Shinnanyo, JP;
Abstract
A manganeses oxide is provided which is represented by the general formula A.sub.x Mn.sub.2 O.sub.4.nH.sub.2 O, where A is Zn, Mg, Ca, or Co; and if A is Zn, 0<x<1 and n=0; if A is Mg or Ca, 0.ltoreq.x.ltoreq.1 and 0.ltoreq.n.ltoreq.20; and if A is Co 0<x.ltoreq.1 and n=0. The manganese oxide has a spinel type, a layer type, or amorphous type both crystal structures of layer type and spinel type. The manganese oxide is produced by oxidizing a mixture of a hydroxide of A (where A is Zn, Mg, Ca, or Co) and manganese hydroxide in a molar ratio 1:2 in an alkali solution, and then removing A by oxidation treatment. A lithium secondary battery is provided by use of a kind of the above manganese oxide for the positive electrode, exhibiting high output with high energy density and with satisfactory reversibility in charge-discharge cycle.