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Published in: Journal of Materials Science: Materials in Electronics 24/2018

16-10-2018

Sulfidation of cobalt nickel oxide nanofibers for improving their specific capacity

Authors: Sheng Zhang, Yabo Zhu, Xiaotong Tang, Chao Shi, Xiuquan Gu, Dekun Zhang

Published in: Journal of Materials Science: Materials in Electronics | Issue 24/2018

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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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Metadata
Title
Sulfidation of cobalt nickel oxide nanofibers for improving their specific capacity
Authors
Sheng Zhang
Yabo Zhu
Xiaotong Tang
Chao Shi
Xiuquan Gu
Dekun Zhang
Publication date
16-10-2018
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 24/2018
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-018-0222-7

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