Electrode active material and use thereof

H - Electricity – 01 – M

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H01M 4/58 (2010.01) H01M 4/136 (2010.01) H01M 4/1397 (2010.01) H01M 10/052 (2010.01) H01M 4/04 (2006.01) C01B 35/12 (2006.01)

Patent

CA 2543721

Disclosed is an electrode active material which mainly contains a metal borate complex and exhibits good charge/discharge characteristics. Also disclosed is a method for producing such an electrode active material. The electrode active material mainly contains an amorphous metal complex represented by the general formula: M2-2xB2xO3. In the formula, M represents one or more metal elements selected from transition metals such as Fe or V, and x satisfying 0 < x < 1 may, for example, be 1/2. Such an electrode active material can be produced by converting a metal complex represented by the general formula: M2-2xB2xO3 into an amorphous state by mechanical milling. The electrode active material can also be produced by solidifying a mixture, which contains an oxide including M as a constituent metal element and a boron oxide, from the molten state by quenching.

L'invention concerne une matière active pour électrode contenant principalement un complexe de borate métallique et qui présente de bonnes caractéristiques de charge et de décharge. L'invention concerne également un procédé pour produire ladite matière active pour électrode. Cette matière active pour électrodes contient principalement un complexe métallique amorphe de formule M¿2-2x?B¿2x?O¿3?. Dans cette formule M représente un ou plusieurs éléments métalliques sélectionnés parmi des métaux de transition tels que Fe ou V, et x satisfaisant 0 < x < 1 peut, par exemple, être ?. Ladite matière active pour électrode peut être produite par la conversion d'un complexe métallique de formule M¿2-2x?B¿2x?O¿3? dans un état amorphe par broyage mécanique. La matière active pour électrode peut également être produite par solidification d'un mélange, contenant un oxyde comprenant M comme élément métallique constituant et de l'oxyde de bore, de l'état fondu par refroidissement.

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