Multi-channel-contained few-layered MoSe2 nanosheet/N-doped carbon hybrid nanofibers prepared using Diethylenetriamine (cas 111-40-0) as anodes for high-performance sodium-ion batteries

Add time:08/28/2019    Source:sciencedirect.com

A facile new strategy for the synthesis of multi-channel-contained N-doped carbon nanofibers composed of few-layered MoSe2 nanosheets (denoted as MC-NCNF/MoSe2) was introduced and the composite was demonstrated as an anode material for sodium-ion batteries. This was the first time that Diethylenetriamine (cas 111-40-0) was introduced as a pore generator in the electrospinning process and played a key role in generating multi-channels in the structure by phase-separation from the molybdenum salt and subsequent volatilization without any additional process. Polyvinylpyrrolidone was used as a carbon precursor and played the role of a N-doping source for the carbon matrix. MC-NCNF/MoSe2 achieved a high reversible discharge capacity of 386 mA h g−1 at a current density of 0.5 A g−1 after the 300th cycle and superior rate capability of 285 mA h g-1 at 10.0 A g−1. The multi-channeled structure of MC-NCNF/MoSe2 facilitated effective Na+ and electron diffusion during repeated discharge/charge processes and accommodated the huge volume expansion of the MoSe2 nanosheets induced by electrochemical reaction of the Na+ ion.

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