| http://www.w3.org/ns/prov#value | - In accordance with one aspect of an exemplary embodiment, the cathode pellets may be produced from a variety of materials, such as calcium chromate (CaCrO4), potassium dichromate (K2Cr2O4), potassium chromate (KCr2O2), lead chromate (PbCrO4), metal oxides such as vanadium pentoxide (V2O5) and tungsten trioxide (WO3), and sulfides such as cupric sulfide (CuS), iron disulfide (FeS2), and cobalt disu
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