WS2 nanoparticles–encapsulated amorphous carbon tubes: A novel electrode material for supercapacitors with a high rate capability

The present communication reports on the preparation of WS 2 nanoparticles–encapsulated amorphous carbon tubes (WS 2 NPs/CTs) via two-step processes. Firstly, CTs were grown in anodic aluminum oxide (AAO) film by hydrothermal carbonization of glucose. Secondly, the as-prepared CTs/AAO film was impregnated with (NH 4 ) 2 WS 4 followed by high temperature treatment in Ar atmosphere . We further demonstrate the application of the resulting WS 2 NP/CT composites as a novel electrode material for supercapacitor . Such composites were found to deliver a specific capacitance of 337   F/g at a high current density of 10   A/g with good cycle stability.