Abstract
An electrospinning method was used to synthesize the Co3O4/NiO nanofibers, which then was sulfurized by solvothermal method in order to improve their electrochemical properties. The SEM pictures showed that sulfurized Co3O4/NiO nanofibers were irregular short nano-rods consisting of nanocrystalline particles; the BET tests showed that sulfuration is beneficial to improve the specific surface area of the fibers; the XPS showed that the existence of the valence state: Co2+, Co3+, Ni2+, Ni3+ and S2− in sulfurized sample, which was confirmed by XRD as Co3S4 and Ni0.96S, respectively. Especially, electrochemical tests showed that the sulfurized Co3O4/NiO nanofibers electrode delivers high specific capacity of 156.84 mA h g−1 at 1 A g−1 and 151.07 mA h g−1 at 10 A g−1 and after 1000 cycles, its capacity retention reaches 87.3% at 5 A g−1. The mechanism of improving the electrochemical performance after sulfidation was also discussed in detail.
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This research is supported by “the Fundamental Research Funds for the Central Universities (no. 2017XKZD08)”.
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Zhang, S., Zhu, Y., Tang, X. et al. Sulfidation of cobalt nickel oxide nanofibers for improving their specific capacity. J Mater Sci: Mater Electron 29, 20800–20807 (2018). https://doi.org/10.1007/s10854-018-0222-7
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DOI: https://doi.org/10.1007/s10854-018-0222-7