Nickel Cobalt Oxide-Single Wall Carbon Nanotube Composite Material for Superior Cycling Stability and High-Performance Supercapacitor Application

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• 作者：Xu Wang ; Xuanding Han ; Mengfang Lim ; Nandan Singh ; Chee Lip Gan ; Ma Jan ; Pooi See Lee
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：June 14, 2012
• 年：2012
• 卷：116
• 期：23
• 页码：12448-12454
• 全文大小：438K
• 年卷期：v.116,no.23(June 14, 2012)
• ISSN：1932-7455

文摘

The electron conductivity of electrode material has always been a problem that hinders the practical application of supercapacitor. In this contribution, we report a facile synthesis of highly conductive nickel cobalt oxide-single wall carbon nanotube (NiCo₂O₄鈥揝WCNT) nanocomposite by controlled hydrolysis process in ethanol鈥搘ater mixed solvent. Ultrafine NiCo₂O₄ nanocrystals with a diameter around 6鈥?0 nm are formed on the functionalized SWCNT bundles. This novel material not only exhibits a high specific capacitance of 1642 F g^鈥? within a 0.45 V potential range but also shows an excellent cycling stability of 94.1% retention after 2000 cycles at high mass loading. Our method provides a promising facile and high-performance strategy for supercapacitor electrode application.