Synthesis and electrochemical performances of mixed-valence vanadium oxide/ordered mesoporous carbon composites for supercapacitors

Liang Hao, Jie Wang, Laifa Shen, Jiajia Zhu, Bing Ding, Xiaogang Zhang*

*この研究の対応する著者

研究成果査読

11 被引用数 (Scopus)

抄録

Mixed-valence vanadium oxide (VOx)/ordered mesoporous carbon (CMK-3) composite (VOC) were synthesized through a facile liquid-phase method followed by calcination. The microstructures of the composite were characterized by X-ray diffraction (XRD), nitrogen adsorption and desorption, X-ray photoelectron spectra (XPS), scanning election microscopy (SEM) and transmission election microscopy (TEM). The relevant results showed that vanadium oxide nanoparticles with mixed valence were successfully embedded in mesoporous channels in the conductive matrix and dispersed on the CMK-3 surface to form the interwoven composite. The introduction of the CMK-3 framework not only improves electron transfer but also prevents the structure collapsing during cycling. As expected, the composite exhibits excellent electrochemical properties. It delivered a specific capacitance of 257 F g-1 at 0.5 A g-1 and maintained 77.3% at 8 A g-1 in 5 M LiNO3. After 5000 cycles, the capacitance only decreased 20%.

本文言語English
ページ(範囲)25056-25061
ページ数6
ジャーナルRSC Advances
6
30
DOI
出版ステータスPublished - 2016
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)

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