Stable form of LiMnO.sub.2 as cathode in lithium cell

Details Stable form of LiMnO.sub.2 as cathode in lithium cell Stable form of LiMnO.sub.2 as cathode in lithium cell

1995-11-20

1997-05-13

Maples, John S.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429197, H01M 450

Patent

active

056291124

ABSTRACT:
The invention disclosed relates to a new method of forming spinel-related .lambda.-Li.sub.2-x Mn.sub.2 O.sub.4, wherein 0.ltoreq.x.ltoreq.2, solely by electrochemical means with air-stable orthorhombic LiMnO.sub.2 as the starting material. This spinel-related material is hydroscopic, metastable and is typically made by chemical means, followed by electrochemical conversion of spinel-type LiMn.sub.2 O.sub.4. Also disclosed are new secondary lithium ion electrochemical cells employing as initial active cathode material a compound of formula LiMnO.sub.2, having a specific orthorhombic crystal structure.

REFERENCES:
patent: 5219684 (1993-06-01), Wilkinson et al.
Ohzuku et al, Chemistry Express, 7, 193 (1992) (No month).

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