Abstract
Layered molybdenum diselenide (MoSe2) anode has received intensive research interest for sodium energy conversion and storage because of its large interlayer spacing, high theoretical capacity and large surface area. However, the volume expansion, inferior electrical conductivity and accumulation of layers are still great challenges, which significantly prevent the application of MoSe2 electrode for sodium energy storage. Herein, the one-dimensional MoSe2@C nanofiber (abbreviated as 1D-MoSe2@C) has been designed and prepared using a facile electrospinning method. The structure, morphology and sodium-storage property of 1D-MoSe2@C have been systematically investigated in this research. The electrochemical measurements reveal that the 1D-MoSe2@C anode displays high discharge capacities of 573.9 and 342.5 mAh g−1 at 0.2 and 3 A g−1. Benefiting from the one-dimensional conductive carbon frameworks, it delivers a high reversible capacity of 287.2 mAh g−1 at 4 A g−1 after 200 cycles with a capacity retention of about 95.2%.
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