| 摘要 |
The invention relates to a rechargeable electrochemical cell comprising a negative electrode, an electrolyte and a positive electrode, characterized in that the positive electrode structure thereof comprises (a) one or more materials selected from the group consisting of LiMn2O4, LiCoO2, LiNiO2, LiNixCo1-xO2 where 0<x<1, preferably LiMn2O4 and (b) one or more materials selected from the group consisting of orthorhombic LiMnO2, monoclinic LiMnO2 (m-LiMnO2), hexagonal LiFeO2 (h-LiFeO2), alpha-NaMnO2, beta-NaMnO2, alpha-NaFeO2, and lithium/sodium compounds of the formula LixNayM(II)O1+1/2(x+y), where x>=0, y>=0 and x+y<=2, and where M(II) is a transition metal in oxidation state +2, selected from the group consisting of Mn, Co, Ni and Fe, preferably LixNayMn(II)O1+1/2(x+y), where x>=0, y>=0 and x+y<=2, more preferably LiNa0.6MnO1.8, the material(s) of group (a) being present in the electrode structure in an amount corresponding to 20-98% by weight of the complete electrode structure, and the material(s) of group (b) being present in the electrode structure in an amount corresponding to 1-79% by weight of the complete electrode stucture. |
