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Vanadium pentoxide nanochains for high-performance electrochemical supercapacitors
Published in Academic Press Inc.
2016
Volume: 472
   
Pages: 210 - 219
Abstract
We have synthesized unique hierarchical one dimensional (1D) nanochains of V2O5 by employing simple hydrothermal method using cetyltrimethylammonium bromide (CTAB) as a soft template. The electrochemical performance of resulting V2O5 electrode materials was evaluated by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy techniques. The V2O5 nanochains (V2O5-ctab) show maximum specific capacitance of 631 F g-1 at a current density of 0.5 A g-1 and retain 300 F g-1 even at high current density of 15 A g-1. In addition the V2O5 nanochains show good cyclic stability with 75% capacitance retention after 1200 charge-discharge cycles. The order of specific capacitance is commercial bulk-V2O5 (160 F g-1) < agglomerated V2O5 particles (395 F g-1) < V2O5 nanochains (631 F g-1). The interconnected nanochain-like morphology and high specific surface area are the main factors which contribute to higher electrochemical performance to V2O5 nanochains and promote facile exchange of Li+ ions during the charge-discharge processes. © 2016 Elsevier Inc.
About the journal
JournalJournal of Colloid and Interface Science
PublisherAcademic Press Inc.
ISSN00219797
Open AccessNo
Concepts (30)
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    Capacitance
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    Cyclic voltammetry
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    Electrochemical impedance spectroscopy
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    Hydrothermal synthesis
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    Vanadium
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    Vanadium compounds
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    Cetyltrimethylammonium bromide
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    CTAB
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    Electrochemical impedance spectroscopy techniques
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    Electrochemical supercapacitor
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    GALVANOSTATIC CHARGE DISCHARGES
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    NANOCHAINS
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    PSEUDOCAPACITIVE BEHAVIOR
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    VANADIUM OXIDES
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    Electric discharges
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    Cetrimide
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    Lithium ion
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    Nanocrystal
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    VANADIUM PENTOXIDE
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    Article
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    Current density
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    Cyclic potentiometry
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    ELECTRIC CAPACITANCE
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    Electrochemical analysis
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    Electrode
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    Morphology
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    Priority journal
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    Surface area
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    Synthesis
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    Thermogravimetry