Preparation and electrochemical properties of a new Fe0.5Co0.5S2 cathode material for thermal batteries

Composite sulfide Fe0.5Co0.5S2 used as cathode material in thermal batteries can be prepared through traditional high-temperature solid-state method and liquid phase method, which combines precipitation and high temperature sulfuration. The single cells with S-Fe0.5Co0.5S2 and L-Fe0.5Co0.5S2 exhibit discharge capacities of 1547.17 A s g(-1) and 1872.89 A s g(-1) with the cut-off voltage of 1.25 V. For comparison, the single cell with FeS2 also discharged, demonstrating a discharge capacity of 1221.45 A s g(-1). Moreover, the physical properties and electrochemical behaviors of L-Fe0.5Co0.5S2 are obviously superior to that of S-Fe0.5Co0.5S2 . Due to its excellent electrochemical properties, Fe0.5Co0.5S2 compound, especially synthesized by liquid phase method, can be used as cathode material instead of FeS2 for thermal batteries. (C) 2018 Elsevier B.V. All rights reserved.