The effect of carbon supports on the electrochemical performance of MoS2 nanosheets for supercapacitor applications was investigated.

Ternary Ni-Co-Se/carbon nanotube nanocomposites have been successfully prepared via a one-step hydrothermal strategy. When used as electrode materials for lithium-ion batteries, the Ni-Co-Se/CNT composite exhibits good lithium storage performances including excellent cycling stability and outstanding specific capacity, good cycling stability, and high initial coulombic efficiency. A high specific capacity of 687.8 mA h g À1 after 100 charge-discharge cycles at a current density of 0.5 A g À1 with high cycling stability is achieved. The excellent battery performance of Ni-Co-Se/CNT should be attributed to the synergistic effect of Ni and Co ions and the formed network structure.

The PCE value of the NiCoSe2-150-based DSSC is 8.76%, which is higher than that of DSSCs based on Pt (8.22%).