Rechargeable spinel lithium batteries with greatly improved...

Details Rechargeable spinel lithium batteries with greatly improved... Rechargeable spinel lithium batteries with greatly improved...

H - Electricity

01

M

H01M 10/058 (2010.01) H01M 4/131 (2010.01) H01M 4/1391 (2010.01) H01M 4/505 (2010.01) H01M 10/0525 (2010.01) H01M 4/56 (2006.01) H01M 10/39 (2006.01) H01M 4/133 (2010.01) H01M 10/0587 (2010.01)

Patent

CA 2308404

The loss in delivered capacity (capacity fade) after cycling non-aqueous rechargeable lithium manganese oxide batteries at elevated temperatures can be greatly reduced by depositing a small amount of certain foreign metal species on the surface of spinel in the cathode. In particular the foreign metal species are from compounds having either bismuth, lead, lanthanum, barium, zirconium, yttrium, strontium, zinc or magnesium. The foreign metal species are introduced to the surface of spinel by moderately heating either an aqueous treated mixture or a dry mixture of ready-made spinel and the foreign metal compound.

La perte de capacité délivrée (affaiblissement) après un cycle d'une batterie aux oxydes de lithium et de manganèse rechargeable à électrolyte non aqueux à des températures élevées peut être grandement réduite en déposant une petite quantité de certaines espèces de métaux étrangers sur la surface du spinelle dans la cathode. En particulier, les espèces de métaux étrangers proviennent de composés ayant soit du bismuth, du plomb, du lanthane, du baryum, du zirconium, du yttrium, du strontium, du zinc ou du magnésium. Les espèces de métaux étrangers sont introduites à la surface du spinelle en chauffant modérément soit un mélange traité aqueux ou un mélange sec de spinelle prêt à l'emploi et le composé de métaux étrangers.

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