Synthesis of reduced graphene oxide/tungsten trioxide nanocomposite electrode for high electrochemical performance

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• 作者：Christelle Pau Ping Wong ^{christellewpp.91@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Chin Wei Lai ; ^{cwlai@um.edu.my" class="auth_mail" title="E-mail the corresponding author} ; Kian Mun Lee ^{leekianmun@um.edu.my" class="auth_mail" title="E-mail the corresponding author} ; Joon Ching Juan ^{jcjuan@um.edu.my" class="auth_mail" title="E-mail the corresponding author} ; Sharifah Bee Abd Hamid ^{sharifahbee@um.edu.my" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Reduced graphene Oxide ; Tungsten trioxide ; Supercapacitor ; Electrochemical performance
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：15 August 2016
• 年：2016
• 卷：42
• 期：11
• 页码：13128-13135
• 全文大小：2065 K

文摘

A facile and well-controllable reduced graphene oxide/tungsten trioxide (rGO/WO₃) nanocomposite electrode was successfully synthesized via an electrostatic assembly route at 350 rpm for 24 h. In this study, hexagonal-phase WO₃ (h-WO₃) nanofiber was well distributed on rGO sheets by applying optimal processing parameters. The as-synthesized rGO/WO₃ nanocomposite electrode was compared with pure h-WO₃ electrode. A maximum specific capacitance of 85.7 F g⁻¹ at a current density of 0.7 A g⁻¹ was obtained for the rGO/WO₃ nanocomposite electrode, which showed better electrochemical performance than the WO₃ electrode. The incorporation of WO₃ into rGO could prevent the restacking of rGO and provide favourable surface adsorption sites for intercalation/de-intercalation reactions. The impedance studies demonstrated that the rGO/WO₃ nanocomposite electrode exhibited lower resistance because of the superior conductivity of rGO that improved ion diffusion into the electrode. To evaluate the contribution of WO₃ to the rGO/WO₃ nanocomposite, the influence of mass loading of WO₃ on the capacitance was investigated.