Synthesis and electrochemical performance of WS2 nanosheet for thermal batteries

Cathode materials that have better thermal stability, larger specific capacity and higher conductivity can efficiently improve the electrochemical performance of the batteries. In this work, we synthesized tungsten disulfide (WS 2 ) nanosheet and investigated its applicability as cathode material for thermal battery. The WS 2 is thermally stable up to 1200 °C. The open-circuit voltage is 1.43 V versus Li-B anode. At a current density of 150 mA cm −2 , the Li-B/WS 2 single cell exhibits a specific capacity of 334.7 mA h g −1 with a cut-off voltage of 1.0 V. The end discharge products are proved to be W and Li 2 S. This work provides a beginning for further applying WS 2 as a promising cathode material for long-life thermal batteries.