Non-aqueous electrolyte secondary cell

H - Electricity – 01 – M

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H01M 10/26 (2006.01) H01M 4/48 (2006.01) H01M 4/52 (2006.01)

Patent

CA 2336460

In a non-aqueous electrolyte secondary cell having a positive electrode mainly composed of a positive electrode active material, a negative electrode, and a non-aqueous electrolyte, the positive electrode active material includes a lithium-containing transition metal complex oxide represented with hexagonal structure by the general formula LiCo1-x M x O 2, wherein M is at least one element selected from the group consisting of V, Cr, Fe, Mn, Ni, Al, and Ti, and a crystallite size (110) of the lithium-containing transition metal complex oxide is greater than 1000 .ANG.. Thereby, the thermal stability of the positive electrode active material is increased, and the discharge characteristic and the charge-discharge characteristic of the cell are improved.

Dans une pile secondaire à électrolyte non aqueux ayant une électrode positive principalement composée d'une matière active d'une électrode positive, une électrode négative, et un électrolyte non aqueux, la matière active d'une électrode positive comprend un oxyde complexe d'un métal de transition contenant du lithium et est représenté avec une structure hexagonale par la formule générale LiCo1-x M x O 2, où M représente au moins un élément choisi dans le groupe constitué de V, Cr, Fe, Mn, Ni, Al, et Ti, et une taille de cristallite (110) de l'oxyde complexe d'un métal de transition contenant du lithium est supérieure à 1000 .ANG. (angstroem). Ainsi, la stabilité thermique de la matière active d'une électrode positive est augmentée, et les caractéristiques de décharge et les caractéristiques de la charge-décharge de la cellule sont améliorées.

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