Facile synthesis of self-standing binder-free vanadium pentoxide-carbon nanofiber composites for high-performance supercapacitors

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• 作者：Arup Choudhury^a ; Ji-Hoon Kim^b ; Kap-Seung Yang^b ; ^{ksyang@chonnam.ac.kr" class="auth_mail" title="E-mail the corresponding author} ; Duck-Joo Yang^c ; ^{djyang@utdallas.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Carbon nanofibres ; Vanadium pentoxide ; Nanocomposite electrode ; Supercapacitor
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：20 September 2016
• 年：2016
• 卷：213
• 期：Complete
• 页码：400-407
• 全文大小：1205 K

文摘

Vanadium pentoxide (V₂O₅) thin layers were hydrothermally deposited on self-standing carbon nanofibre (CNF) paper, which was fabricated through electrospinning of polyacrylonitrile (PAN) precursor solution followed by thermal stabilization and carbonization. The prepared V₂O₅/CNF nanocomposite paper was characterized by various spectroscopic and microscopic techniques. The electrochemical performance of as-prepared free-standing nanocomposite electrode was examined using cyclic voltammetry (CV) and galvanostatic charge-discharge techniques for supercapacitor applications. A specific capacitance of 227 F/g and 157 F/g were achieved for the nanocomposite obtained from V₂O₅-deposition of 5 and 7-day period, respectively, using 2 M KCl as electrolyte at sweep rate 1 A/g. The specific capacitance of the nanocomposites was retained up to 80% over 1000 cycles. The maximum energy density of 63.6 Wh/kg and power density of 4554.6 W/kg was achieved for the 5-day deposited samples. A simple and cost-effective synthesis approach of flexible binder-free V₂O₅/CNF nanocomposite paper with good capacitive behavior encourages its commercial exploitation.