| 摘要 |
PURPOSE:To increase battery voltage and energy density by containing at least one halogen element in a positive active material. CONSTITUTION:A positive active material has a composition represented by LiwMxOyXz. M shows Co, Ni, Mn, V, Fe, or Ti, and X shows at least one halogen element. As the halogen element, fluorine is most effective. A composition ratio is in a range of 2<=w<=2.5, 0.8<=x<=1.25, 1<=y<=2, and 0<z<=1. Insertion/ release of lithium attendant on charge/discharge is carried out within an adquate range, and even if the valency of the component M is changed, reversibility is maintained, and high reactivity of the halogen element in the component X with lithium is retarded. |
