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AssigneeValence Technology, Inc.
InventorsJeremy Barker, M. Yazid Saidi, Jeffrey L. Swoyer
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Electrode active materials comprising lithium or other alkali metals, a transition metal, and a phosphate or similar moiety, of the formula: Aa+xMbP1-xSixO4 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; and wherein M, a, b, and x are selected so as to maintain electroneutrality of said 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.
An electrode active material comprising a compound of the formula
An electrode active material comprising a compound of the formula
An electrode active material comprising a compound of the formula
An electrode active material comprising a compound of the formula
An electrode active material according to clam 26, wherein M′ is selected from the group consisting of Ti, V, Cr, Mn, Co, Fe, Ni, Cu, and mixtures thereof.
An electrode active material comprising a compound of the formula
Dependencies are inferred from the claim text.