Preparation and electrochemistry properties of NiCo<sub>2</sub>O<sub>4</sub> nanowire/SiC composite fiber

ZHU Bin; LIU Pan; LV Dongfeng; CUI Yi; WEI Hengyong; CHEN Yuejun; WEI Yingna; BU Jinglong

doi:10.13801/j.cnki.fhclxb.20191121.001

Volume 37 Issue 7

Aug. 2020

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ZHU Bin, LIU Pan, LV Dongfeng, et al. Preparation and electrochemistry properties of NiCo2O4 nanowire/SiC composite fiber[J]. Acta Materiae Compositae Sinica, 2020, 37(7): 1684-1694. doi: 10.13801/j.cnki.fhclxb.20191121.001

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ZHU Bin, LIU Pan, LV Dongfeng, et al. Preparation and electrochemistry properties of NiCo₂O₄ nanowire/SiC composite fiber[J]. Acta Materiae Compositae Sinica, 2020, 37(7): 1684-1694. doi: 10.13801/j.cnki.fhclxb.20191121.001

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Preparation and electrochemistry properties of NiCo₂O₄ nanowire/SiC composite fiber

doi: 10.13801/j.cnki.fhclxb.20191121.001

Key Laboratory for Inorganic Nonmetallic Materials of Hebei Province, College of Material Science and Engineering, North China University of Science and Technology, Tangshan 063210, China

Received Date: 2019-08-04
Accepted Date: 2019-11-20

Available Online: 2019-11-21

Publish Date: 2020-07-15

Abstract

Abstract

The β-SiC fibers with high degree of crystallinity were obtained by electrospinning combined with carbothermal reduction method using tetraethyl orthosilicate (TEOS) as silicon source and polyvinylpyrrolidone (PVP) as spinning agent. The specific surface area of β-SiC fibers is 92.6 m²/g, which show the electric double layer capacitance. The specific capacitance of β-SiC fibers is up to 155.7 F/g. A large number of NiCo₂O₄ nanowires with a diameter of about 15 nm were grown on the surface of SiC fibers via hydrothermal method in order to obtain NiCo₂O₄ nanowires/SiC composite fibers. The results show that nickel and cobalt elements are present in the form of Ni²⁺/Ni³⁺ and Co²⁺/Co³⁺, respectively. The specific capacitance is significantly improved by the synergistic effect of NiCo₂O₄ nanowires and SiC fiber, and the NiCo₂O₄ nanowires/SiC composite fibers show both electric double layer and pseudo capacitance. The specific capacitance of NiCo₂O₄ nanowires/SiC composite fibers is up to 300.3 F/g. When the power density is 58.1 W/kg, the energy density of NiCo₂O₄ nanowires/SiC composite fibers is 60.1 W·h/kg.
- NiCo₂O₄nanowire,
- SiC,
- composite fibers,
- carbothermal reduction,
- hydrothermal method,
- electrochemistry
Long Abstrsct
Innovation Points

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References(30)

References

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