High voltage lithium insertion compound usable as cathode active material for a rechargeable lithium electrochemical cell

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United States of America Patent

APP PUB NO 20030138696A1
SERIAL NO

10289343

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Abstract

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The present invention provides a lithium insertion compound suitable for operating at a voltage greater than 4.5 V relative to Li/Li.sup.+, derived by substituting spinel structure lithium manganese dioxide, the compound being characterized in that its formula is: LiMn.sub.2-(x+y)M.sub.xM'.sub.yO.sub.4 in which 00.50, M is Co, and M' is selected from Ti and Mo. The invention also provides a method of manufacturing an insertion compound according to any preceding claim, from a spinel structure intermediate compound of general formula Li.sub.r(E).sub.3O.sub.4 in which r<1 and E designates the set of cations to be introduced into the final material. This method produces a lithium insertion compound suitable for operating at a voltage higher than 4.5 V relative to Li/Li.sup.+, derived by substituting spinel structure lithium manganese dioxide, the compound being characterized in that its formula is: LiMn.sub.2-(x+y)M.sub.xM'.sub.yO.sub.4 in which 00.50, M is Co or Ni, and M' is selected from Ti, Al, Co, and Mo.

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Patent Owner(s)

Patent OwnerAddress
SAFT FINANCE S AR L398 ROUTE D'ESCH L-1471

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Audry, Claudette Bruges, FR 11 84
Biensan, Philippe Carignan de Bordeaux, FR 19 233
Boeuve, Jean-Pierre Montussan, FR 9 208
Lecerf, Andre Pace, FR 16 263
Peres, Jean-Paul Merignac, FR 6 119
Siret, Clemence Bruges, FR 5 63

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