Manganese oxides production thereof, and use thereof

Details Manganese oxides production thereof, and use thereof Manganese oxides production thereof, and use thereof

1996-01-11

1997-09-30

Bos, Steven

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423594, C01G 4500, C01G 5100, C01G 900, C01F 100

Patent

active

056723296

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.

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