Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Reexamination Certificate
2006-04-11
2006-04-11
Weiner, Laura (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
C429S218100, C429S231950, C429S224000, C252S518100, C252S519130, C423S179500
Reexamination Certificate
active
07026069
ABSTRACT:
Reacting MnO2, a lithium compound and a bismuth compound produces a lithium battery cathode material for lithium electrochemical systems. The same results can also be achieved by reacting MnO2, lithium, or a compound containing lithium and bismuth, or a compound containing bismuth. Manganese based mixed metal oxides with lithium and bismuth were initially examined as a cathode material for rechargeable lithium and lithium-ion batteries in order to provide a new mixed metal oxide cathode material as the positive electrode in rechargeable lithium and lithium ion electrochemical cells. A stable mixed metal oxide was fabricated through a solid-state reaction between manganese dioxide, a lithium compound and bismuth or a bismuth compound. In addition to the lithium battery cathode material, a lithium manganese bismuth mixed metal oxide cathode, a lithium electrochemical system with a lithium manganese bismuth mixed metal oxide and a rechargeable lithium battery with a lithium manganese bismuth mixed metal oxide cathode are also provided. These devices provide much improved sustained specific capacity of about 120 mAhrs/g and the material exhibits an inherent catalytic behavior for charge transfer.
REFERENCES:
patent: 6489060 (2002-12-01), Zhang et al.
Atwater et al. “Thermodynamic and kinetic study of the Li/MnO2 Bi2O3 electrochemical couple”, Journal of the Electrochemical Society, vol. 145, No. 3, Mar. 1998, pp. L31-L33.
Atwater et al. “Electrochemical properties of the Li/MnO2 Bi2O3 couple”, Proceedings of the Power Sources Conference (1998), 38th.
Atwater Terrill B.
Suszko Arek
Tereschuk George B.
The United States of America as represented by the Secretary of
Weiner Laura
Zelenka Michael
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