Abstract Layered transition metal dichalcogenides (TMDs) such as molybdenum diselenides (MoSe2) have raised much research interest for its excellent electrochemical and catalytic properties. In this study, a new nanocomplex (MoSe2/HPCFs)… Click to show full abstract
Abstract Layered transition metal dichalcogenides (TMDs) such as molybdenum diselenides (MoSe2) have raised much research interest for its excellent electrochemical and catalytic properties. In this study, a new nanocomplex (MoSe2/HPCFs) was constructed by anchoring MoSe2 nanosheets onto nitric-acid modified Polyacrylonitrile carbon nanofibers (HPCFs) via one pot hydrothermal treatment, followed by calcination. To target issues triggered by energy storage, lithium-ion batteries (LIBs), sodium-ion batteries (SIBs) and hydrogen evolution reactions (HER) were deployed to comprehensively assess the electrochemical and electrocatalytic performances of the binder-free MoSe2/HPCFs electrodes. When investigated as anode material for LIBs and SIBs, the MoSe2/HPCFs electrodes delivered initial discharge capacities of 862.7 and 586.6 mA h g−1, respectively, at a current density of 0.1 A g−1. The MoSe2/HPCFs electrodes also displayed outstanding electrocatalytic activity in HER, requiring only 106 mV of overpotential to reach a current density of 10 mA cm−2, all the while having a small Tafel slope of 61 mV dec−1. This study’s findings suggest that the synergistic combination of HPCFs fibers and MoSe2 nanosheets could significantly enhance the electrochemical and electrocatalytic performances of Li-ion/Na-ion batteries and HER, which could provide a feasible and easy solution in designing high-performance flexible devices for energy storage and conversion.
               
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