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Investigating the electroactivity of nitrogen species in MoC nanoparticles/N-doped carbon nanosheets for high-performance Na/Li-ion batteries

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Abstract

Various MoC/nitrogen (N)-doped carbon nanosheet hybrid materials (MoC@NCs) have been synthesized, and the effects of various N dopants [graphitic N (G6-N), pyrrolic N (P5-N), pyridinic N (P6-N), and Mo–N] on the electrochemical properties were systematically investigated. With increasing N-doping of MoC@NCs, the electronic conductivity increases. The formation of Mo–N bonds improves the electrochemical stability of MoC@NCs by pinning MoC nanoparticles (NPs) on carbon nanosheets, while the defective species (P5–N and P6–N) are of benefit for ion storage. Thus, MoC@NC-1.0 displays the best cycling stability and rate capability for both sodium-ion batteries (SIBs) (98% capacity retention after 1000 cycles at 1.0 A g−1) and lithium-ion batteries (LIBs) (762 mA h g−1 at 1.0 A g−1). This work not only presents an in-depth understanding of how various N dopants can enhance the electrochemical properties of MoC@NC electrodes but also offers new avenues to develop novel electrode materials for alkaline-ion batteries.

Graphical abstract: Investigating the electroactivity of nitrogen species in MoC nanoparticles/N-doped carbon nanosheets for high-performance Na/Li-ion batteries

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Supplementary files

Article information


Submitted
24 Aug 2020
Accepted
25 Sep 2020
First published
25 Sep 2020

J. Mater. Chem. A, 2020, Advance Article
Article type
Paper

Investigating the electroactivity of nitrogen species in MoC nanoparticles/N-doped carbon nanosheets for high-performance Na/Li-ion batteries

Q. Wu, X. Li, X. Wang, T. Yao, Y. Bai, J. Jian and B. Song, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/D0TA08301A

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