High rate performance carbon nano-cages with oxygen-containing functional groups as supercapacitor electrode materials. (January 2017)

• Record Type: Journal Article
• Authors: Jiang, Liang; Wang, Jing; Mao, Xuyan; Xu, Xiangyu; Zhang, Bo; Yang, Jie; Wang, Yunfei; Zhu, Jun; Hou, Shifeng
• Is Part Of: Carbon. Volume 111(2017)
• Page Start: 207
• Page End: 214
• Publication Date: 2017-01
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2016.09.081
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Graphitized carbon nano-cages can be prepared by carbon dioxide and magnesium metal as precursors. The carbon materials can produce a large amount of functional groups by the oxidation of nitric acid. Compared with amorphous carbon, the oxidation treatment can improve capacitive performance of carbon nano-cages, especially rate performance. At high scan rate, specific capacitance of carbon nano-cages is much higher than that of the microporous activated carbon. So carbon nano-cages are promising high rate performance materials. A series of physical and chemical characterization exhibits that excellent capacitive performance is derived from carbon nano-cages structure themselves. It is due to higher electrical conductivity of graphite structure, lower charge transfer resistance of hierarchical porous structure and extra pseudo-capacitance of oxygen-containing functional groups. Graphical abstract: