| 摘要 |
Electrode active materials comprising lithium or other alkali metals, a transition metal, and a phosphate or similar moiety, of the formula:wherein(a) A is selected from the group consisting of Li, Na, K, and mixtures thereof, and 0<a<1.0 and 0<=X≤1;(b) M comprises one or more metals, comprising at least one metal which is capable of undergoing oxidation to a higher valence state, where 0<B≤2; ANDwherein M, a, b, and x are selected so as to maintain electroneutrality of the compound. In a preferred embodiment, M comprises at least one transition metal selected from Groups 4 to 11 of the Periodic Table. In another preferred embodiment, M comprises M'cM''d, where M' is at least one transition metal from Groups 4 to 11 of the Periodic Table; and M'' is at least one element from Groups 2, 3, 12, 13, or 14 of the Periodic Table, and c+d=b. Preferably, 0.1<=a<=0.8. Preferred embodiments include those having a structure similar to the mineral olivine (herein "olivines"). This invention also provides electrodes comprising an electrode active material of this invention, and batteries that comprise a first electrode having an electrode active material of this invention; a second electrode; and an electrolyte.
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