A Facile Strategy for the Preparation of MoS 3 and its Application as a Negative Electrode for Supercapacitors

Owing to their graphene‐like structure and available oxidation valence states, transition metal sulfides are promising candidates for supercapacitors. Herein, we report the application of MoS 3 as a new negative electrode for supercapacitors. MoS 3 was fabricated by the facile thermal decomposition of a (NH 4 ) 2 MoS 4 precursor. For comparison, samples of MoS 3 &MoS 2 and MoS 2 were also synthesized by using the same method. Moreover, this is the first report of the application of MoS 3 as a negative electrode for supercapacitors. MoS 3 displayed a high specific capacitance of 455.6 F g −1 at a current density of 0.5 A g −1 . The capacitance retention of the MoS 3 electrode was 92 % after 1500 cycles, and even 71 % after 5000 cycles. In addition, an asymmetric supercapacitor assembly of MoS 3 as the negative electrode demonstrated a high energy density at a high potential of 2.0 V in aqueous electrolyte. These notable results show that MoS 3 has significant potential in energy‐storage devices.