Positive electrode active material, method for producing...

H - Electricity – 01 – M

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H01M 4/58 (2010.01) H01M 4/136 (2010.01) H01M 4/1397 (2010.01) H01M 10/0585 (2010.01) C01B 25/45 (2006.01) H01M 4/04 (2006.01)

Patent

CA 2623629

Disclosed is an olivine-type positive electrode active material which is a low- cost positive electrode active material having high safety and excellent battery characteristics such as energy density. Also disclosed are a method for producing such an olivine-type positive electrode active material, and a nonaqueous electrolyte battery having a positive electrode which contains such an olivine-type positive electrode active material. Specifically disclosed is a positive electrode active material having a particle diameter of 10-500 nm and containing an olivine-type lithium manganese phosphate compound represented by the following general formula (1): LixMnyMaPO4 (1) (wherein 0 < x < 2, 0 < y < 1, 0 < a < 1, and M represents at least one metal element selected from the group consisting of Co, Ni, Fe, Zn, Cu, Ti, Sn, Zr, V and Al).

La présente invention concerne un matériau actif pour électrode positive de type olivine qui est un matériau actif pour électrode positive économique présentant une sécurité élevée et d~excellentes caractéristiques de batterie comme la densité d~énergie. Elle concerne également un procédé de production d'un tel matériau actif pour électrode positive de type olivine, et une batterie à électrolyte non aqueux comportant une électrode positive qui contient un tel matériau actif pour électrode positive de type olivine. Elle concerne spécifiquement un matériau actif pour électrode positive dont le diamètre de particule est de 10-500 nm et contenant un composé de phosphate de lithium manganèse de type olivine représenté par la formule générale suivante (1) : LixMnyMaPO4 (1) (avec 0 < x < 2, 0 < y < 1, 0 < a < 1, et M représentant au moins un élément métallique sélectionné parmi le groupe constitué de Co, Ni, Fe, Zn, Cu, Ti, Sn, Zr, V et Al).

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