| 摘要 |
Electrode active materials, preferably having an olivine structure, of the formula: AaMbXY4 wherein (a) A is one or more alkali metals, preferably Li, and 0<a<=2; (b) M is one or more metals, comprising Co and Fe, 0<b<=2; and (c) XY4 is X'O4-xY'x, X'O4-yY'2y, X''S4, or a mixture thereof, where X' is P, As, Sb, Si, Ge, V, S, or a mixture thereof; X'' is P, As, Sb, Si, Ge, V, or a mixture thereof; Y' is halogen, S, N, or a mixture thereof; 0<=x<3; and 0<y<4. Preferably 0.8<=a<=1.2, and 0.9<=b<=1. In a preferred embodiment, M further comprises one or more non-transition elements. Also provided are electrodes and batteries comprising an electrode active material of this invention.
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