Electrospun Carbon Nanofibers with in Situ Encapsulated Co3O4 Nanoparticles as Electrodes for High-Performance Supercapacitors

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• 作者：Sara Abouali ; Mohammad Akbari Garakani ; Biao Zhang ; Zheng-Long Xu ; Elham Kamali Heidari ; Jian-qiu Huang ; Jiaqiang Huang ; Jang-Kyo Kim
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：June 24, 2015
• 年：2015
• 卷：7
• 期：24
• 页码：13503-13511
• 全文大小：628K
• ISSN：1944-8252

文摘

A facile electrospinning method with subsequent heat treatments is employed to prepare carbon nanofibers (CNFs) containing uniformly dispersed Co₃O₄ nanoparticles as electrodes for supercapacitors. The Co₃O₄/CNF electrodes with 鈭?8 wt % active particles deliver a remarkable capacitance of 586 F g^鈥? at a current density of 1 A g^鈥?. When the current density is increased to 50 A g^鈥?, 鈭?6% of the original capacitance is retained. The electrodes also present excellent cyclic stability of 74% capacity retention after 2000 cycles at 2 A g^鈥?. These superior electrochemical properties are attributed to the uniform dispersion of active particles in the CNF matrix, which functions as a conductive support. The onionlike graphitic layers formed around the Co₃O₄ nanoparticles not only improve the electrical conductivity of the electrode but also prevent the separation of the nanoparticles from the carbon matrix.