Patent Number: 7,087,346

Title: Alkali/transition metal phosphates and related electrode active materials

Abstract: Electrode active materials comprising lithium or other alkali metals, a transition metal, and a phosphate or similar moiety, of the formula: A.sub.a+xM.sub.bP.sub.1-xSi.sub.xO.sub.4 wherein (a) A is selected from the group consisting of Li, Na, K, and mixtures thereof, and 0<a<1.0 and 0.ltoreq.x.ltoreq.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.ltoreq.2; and wherein M, a, b, and x are selected so as to maintain electroneutrality of said compound.

Inventors: Barker; Jeremy (Oxfordshire, GB), Saidi; M. Yazid (Henderson, NV), Swoyer; Jeffrey (Henderson, NV)

Assignee: Valence Technology, Inc.

International Classification: H01M 4/00 (20060101); H01M 4/58 (20060101)

Expiration Date: 8/08/02018