Method of forming a stable form of LiMnO.sub.2 as cathode in lit

Details Method of forming a stable form of LiMnO.sub.2 as cathode in lit Method of forming a stable form of LiMnO.sub.2 as cathode in lit

1995-04-26

1996-04-09

Maples, John S.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429197, H01M 458, H01M 614

Patent

active

055060781

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: 4893476 (1991-01-01), Slane et al.
patent: 5169736 (1992-12-01), Bittihn et al.
patent: 5219684 (1993-06-01), Wilkinson et al.
Hoppe et al., J. Anorg. Allg. Chem., 417, 1 (no month) (1975).
Ohzuku et al. Chemistry Express, 7, 193 (no month) (1992).

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