Positive electrode active material for lithium battery and a met

Details Positive electrode active material for lithium battery and a met Positive electrode active material for lithium battery and a met

1996-10-09

1998-07-21

Nuzzolillo, M.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429224, H01M 204

Patent

active

057833320

ABSTRACT:
A positive electrode active material for lithium battery which is represented by general formula Li.sub.x Mn.sub.2-y M.sub.y O.sub.4 (M: a 2-valency metal selected from Ni, Co, Fe and Zn with 0.45.ltoreq.y.ltoreq.0.60, 1.ltoreq.x.ltoreq.2.1) having cubic spinel structure of lattice constant within 8.190 angstrom. Such an active material is manufactured by employing sol-gel process wherein one of inorganic salt, hydroxide and organic acid salt of lithium or a mixture of these for Li, one of inorganic salt and organic acid salt of manganese or a mixture of these for Mn, and one of inorganic salt and organic acid salt of the selected metal or a mixture of these for M are used as the starting materials for synthesis, ammonia water is added to the solutions of these starting materials in alcohol or water to obtain gelatinous material and the gelatinous material thus obtained is fired.

REFERENCES:
patent: 5169736 (1992-12-01), Bittihn et al.
patent: 5316877 (1994-05-01), Thackeray et al.
Taracsson et al., The Spinekl Phase of Li1Mn204 as a Cathode in Secondary Lithium Cells, J. Electrochem. Soc., vol. 138, No. 10, Oct. 1991, pp. 2859-2864.
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Mat. Res. Bull., vol. 18 (1983), pp. 461-472. Lithium Insertion Into Maganese Spinels, M.M. Tackery, W. I. F. David, P.G. Bruce,and J. B. Goodenough (Mouth N/A).
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Journal of Power Sources 52 (1994) , pp. 185-192. Determination of thermodynamic, kinetic and interfacial properties for the Li/Li.sub.x Mn.sub.2 O.sub.4 system by electrochemical techniques, J. Barker, R. Pynenburg, R. Koksbang (Mouth N/A).
J. Electrochem. Soc., vol. 183, No. 10 (Oct. 1991) , pp. 2859-2864. The Spinel Phase of LiMn.sub.2 O.sub.4 as a Cathode in Secondary Lithium Cells, J.M. Tarascon, E. Wang, and F.K Shokoohi.
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Japanese Patent Application Laid-Open No. 63-274059, filed Nov. 11, 1988.
Japanese Patent Application Laid-Open No. 4-87268, filed Mar. 19, 1992.
Thr Spinal Phase of LiMn.sub.2 O.sub.4 as a Cathrode in Secondary Lithium Cells by Tarascon.
The Spinal Phases LiMyMn2-yO4 (M=Co, Cr, Ni) as the cathode for rechargeable lithium batteries by Li Guahua et al., Oct. 1991.

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