| http://www.w3.org/ns/prov#value | - LiVPO4F, other ???polyanion??? compounds as described below, and vanadium oxides VxOy including V2O5 and V6O11.In one or more embodiments the active material comprises a transition metal polyanion compound, for example as described in U.S. Pat. No. 7,338,734.
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