A facile new strategy for the synthesis of multi-channel-contained N-doped carbon nanofibers composed of few-layered MoSe 2 nanosheets (denoted as MC-NCNF/MoSe 2 ) was introduced and the composite was demonstrated as an anode material for sodium-ion batteries. This was the first time that diethylenetriamine 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/MoSe 2 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/MoSe 2 facilitated effective Na + and electron diffusion during repeated discharge/charge processes and accommodated the huge volume expansion of the MoSe 2 nanosheets induced by electrochemical reaction of the Na + ion.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) ( NRF-2018R1A4A1024691 , NRF-2017M1A2A2087577 , NRF-2018R1D1A3B07042514 ).
© 2019 The Korean Society of Industrial and Engineering Chemistry
- Molybdenum diselenide
- Sodium ion batteries
ASJC Scopus subject areas
- General Chemical Engineering