期刊
APPLIED SURFACE SCIENCE
卷 533, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.147521
关键词
NiCo2S4; Porous carbon fiber; High-rate; Asymmetric supercapacitor
类别
资金
- National Natural Science Foundation of China [21471041]
- Natural Science Foundation of Heilongjiang Province of China [QC2017007]
- University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2017181]
The intertwined fiber structure is advantageous as a structure of supercapacitor electrode material. In this paper, the NiCo2S4 embedded in carbon fiber (NiCo2S4/CF) has been prepared through hydrothermal vulcanization of electrospun NiCo2O4/carbon nanofibers precursor. It is a simple way to integrate the pseudocapacitive material with carbon, rendering high capacitance (1169 F g(-1) at 1 A g(-1)), excellent rate capability (81.3% at 20 A g(-1)) and superior cycle stability (87.2% capacitance retention after 10,000 cycles). Afterwards, an all-solid-state asymmetric supercapacitor device (ASC) has been prepared with the NiCo2S4/CF positive electrode and porous carbon nanofiber negative electrode. When the power density of ASC is 878.3 W kg(-1), the energy density can reach 28.8 Wh kg(-1) with excellent cycle stability.
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