Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Patent
1998-05-08
1999-10-05
Nuzzolillo, Maria
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
4292311, 423599, H01M 450
Patent
active
059621664
ABSTRACT:
A series of electroactive insertion compounds, LiM.sub.y.sup.II M.sub.z.sup.III Mn.sub.l.sup.III Mn.sub.q.sup.IV O.sub.4 (0<y+z.ltoreq.0.5, y+z+l+q=2), where M=any transition metal or combination of metals, for application in non-aqueous batteries, capacitors, and superconducting materials, are disclosed. These newly synthesized compounds are unique in that they contain at least two mixed valence elements, thereby allowing the reversible intercalation of lithium cations at potentials near 4.7-5.1 V vs. lithium. Also disclosed are novel copper insertion compounds of the formula LiM.sub.y Cu.sub.0.5-y Mn.sub.1.5 O.sub.4 (0.ltoreq.y.ltoreq.0.49), where M=one or more metals or transition metals. Such materials have also been found to be remarkably stable at this voltage upon repeated cycling.
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Ein-Eli et al., "LiMn2-xCuxO4 Spinels (0.1<.times.<0.5) . . . " J. Ekectrochem. Soc., vol. 145, pp. 1238-1244, Apr. 1998.
Ein-Eli et al., "LiCuxCuyMn(2-(x+y)O4: 5 V Cathode Materials", J. Electrochem Soc., vol. 144, p. L205, Aug. 1997.
Krutzsch et al., "Uber Das System . . . ", Journal of the Less Common Metals, vol. 124 pp. 155-164, Oct. 1986.
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Ein-Eli Yair
Howard, Jr. Wilmont F.
Chaney Carol
Covalent Associates, Inc.
Nuzzolillo Maria
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