Lithium metal oxide electrodes for lithium cells and batteries

Details Lithium metal oxide electrodes for lithium cells and batteries Lithium metal oxide electrodes for lithium cells and batteries

H - Electricity

01

M

H01M 4/131 (2010.01) H01M 4/505 (2010.01) H01M 4/525 (2010.01) H01M 10/0525 (2010.01)

Patent

CA 2527207

A lithium metal oxide positive electrode for a non-aqueous lithium cell or battery is disclosed. The positive electrode comprises a lithium metal oxide having a layered structure and a general formula, after in-situ or ex-situ oxidation, of LixMnyM1-y O2wherein 0 <= x <= 0.20, 0 < y < 1, manganese is in the 4+ oxidation state, and M is one or more the first row transition metals: Ti, V, Cr, Mn, Fe, Co, Ni or Cu, or other specific other canons: AI, Mg, Mo, W, Ta, Si, Sn, Zr, Be, Ca, Ga, and P, which have an appropriate ionic radii to be inserted in to the structure without unduly disrupting it. Usage of the materials of the invention in lithium cells and batteries is disclosed. A process is disclosed for formation of materials of the invention.

L'invention concerne une électrode positive d'oxyde de métal lithium pour pile ou batterie au lithium non aqueux. Ladite électrode positive comprend un oxyde de métal lithium à structure en couche et présentant une formule générale, après oxydation in situ ou ex situ, de Li¿x?Mn¿y?M¿1-y?O¿2?, où O <= x <=0,20, O < y < 1, le manganèse étant à l'état d'oxydation 4+ et M désignant un ou plusieurs des métaux de transition de la première série: Ti, V, Cr, Mn, Fe, Co, Ni ou Cu ou d'autres cations spécifiques : Al, Mg, Mo, W, Ta, Si, Sn, Zr, Be, Ca, Ga et P, qui comportent un rayon ionique approprié à introduire dans la structure sans la rompre indûment. L'invention concerne également l'utilisation des matériaux de l'invention dans des piles et des batteries au lithium. L'invention concerne par ailleurs un procédé de formation des matériaux selon l'invention.

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