| abstract |
Process of making high purity, synthetic FeS 2 , and an electrochemical battery employing such synthetic FeS 2 in the positive electrode. Synthetic FeS 2 may be prepared by a sulfidation process comprising reacting ferric oxide, hydrogen sulfide, and elemental sulfur at a temperature above the melting point of element sulfur. Synthetic FeS 2 may also be produced by a milling process that comprises (i) milling iron powder and sulfur powder in the presence of a milling media and a processing agent to provide a homogenous powder mixture, and (ii) treating the powder mixture to form FeS 2 . In the milling process, the powder mixture may be treated to form FeS 2 by heating the powder mixture or subjecting the powder mixture to a subsequent milling operation. |