Premium
Designed Synthesis and Supercapacitor Electrode of V 2 O 3 @C Core‐shell Structured Nanorods with Excellent Pseudo‐capacitance in Na 2 SO 4 Neutral Electrolyte
Author(s) -
Zhang Yifu
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702705
Subject(s) - supercapacitor , pseudocapacitance , capacitance , materials science , nanorod , amorphous solid , electrode , calcination , electrolyte , nanotechnology , electrochemistry , chemical engineering , analytical chemistry (journal) , chemistry , crystallography , catalysis , chromatography , biochemistry , engineering
Abstract V 2 O 3 @C core‐shell structured nanorods (VCNR) were successfully prepared using V 2 O 5 nanowires and glucose via a facile hydrothermal route combination of calcination. VCNR comprised of core‐shell structures with V 2 O 3 cores and amorphous carbon shells. Electrochemical properties of VCNR as supercapacitor electrodes were studied in Na 2 SO 4 neutral electrolyte. Results demonstrated that VCNR featured capacitive behavior originating from pseudocapacitance. Specific capacitances of VCNR at 0.5, 1, 2, 5 and 10 A⋅g −1 were achieved to 219, 192, 148, 127 and 119 F⋅g −1 , respectively, and VCNR displayed higher specific capacitance than the values of carbon spheres and V 2 O 3 particles. Maximum specific capacitance of VCNR reached 219 F⋅g −1 at 0.5 A⋅g −1 in present study, which was superior to the reported values of V 2 O 3 ‐based materials and VO 2 ‐based materials. Capacitance retention of VCNR was 100% after 700 cycles and 66% after 1000 cycles. Findings in present study proved that VCNR could be promising candidate as an ideal material for supercapacitors’ electrode.