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- Title
NiCo2O4 纳米线/SiC 复合纤维制备及其电化学性能.
- Authors
朱彬; 刘盼; 吕东风; 崔燚; 魏恒勇; 陈越军; 魏颖娜; 卜景龙
- 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.
- Subjects
ELECTRIC double layer; ENERGY density; FIBROUS composites; POWER density; ETHYL silicate; SEMICONDUCTOR nanowires
- Publication
Acta Materiae Compositae Sinica, 2020, Vol 37, Issue 7, p1684
- ISSN
1000-3851
- Publication type
Article
- DOI
10.13801/j.cnki.fhclxb.20191121.001