Preparation of niobium pentoxide loaded on porous carbon and its application in supercapacitors

Li, Heshun, Gao, Lixin, Zhang, Daquan and Lin, Tong 2016, Preparation of niobium pentoxide loaded on porous carbon and its application in supercapacitors, Hua gong xue bao = CIESC journal, vol. 67, no. 7, pp. 3071-3077, doi: 10.11949/j.issn.0438-1157.20151500.

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Title Preparation of niobium pentoxide loaded on porous carbon and its application in supercapacitors
Author(s) Li, Heshun
Gao, Lixin
Zhang, Daquan
Lin, TongORCID iD for Lin, Tong
Journal name Hua gong xue bao = CIESC journal
Volume number 67
Issue number 7
Start page 3071
End page 3077
Total pages 7
Publisher Zhongguo hua gong xue hui
Place of publication Beijing, China
Publication date 2016-07
ISSN 0438-1157
Keyword(s) Nb2O5
porous carbon
Summary Niobium pentoxide (Nb2O5) loaded on porous carbon was synthesized from resorcinol, formaldehyde and niobium oxalate hydrate based on in-situ polymerization and high-temperature calcination. X-ray diffraction (XRD) and scanning electron microscope (SEM) examinations showed that the orthorhombic type Nb2O5 was synthesized and loaded on porous carbon with protrusion on its surface. Cyclic voltammetry (CV) tests indicated that the specific capacitance of the composites was 290 F·g-1 (1.0~3.0 V vs. Li+/Li) with a good large-current discharge capability evidenced by the capacitance of 108 F·g-1 at a large-current of 5 A·g-1. The initial capacitance was 355 F·g-1 at 0.5 A·g-1 with 82% capacitance being maintained after 100 cycles. The pseudocapacitance characteristics of the complex was studied by analyzing the electrochemical impedance spectroscopy (EIS) and simulation of equivalent circuit. The improved conductivity and pseudocapacitance of Nb2O5 were due to several factors including the shortened distance in the composites and the reduced diffusion resistance of the Li+ in the electrolyte during the charge-discharge process and the enhanced contact with the electrolyte because of the protrusion morphology.
Language chi
DOI 10.11949/j.issn.0438-1157.20151500
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 0 Not Applicable
HERDC Research category C1 Refereed article in a scholarly journal
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