High rate performance carbon nano-cages with oxygen-containing functional groups as supercapacitor electrode materials

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• 作者：Liang Jiang^a ; ^{jiangliangjnmc@126.com" class="auth_mail" title="E-mail the corresponding author} ; Jing Wang^b ; Xuyan Mao^a ; Xiangyu Xu^a ; Bo Zhang^c ; Jie Yang^a ; Yunfei Wang^d ; Jun Zhu^a ; Shifeng Hou^a ; ^{shifenghou@sdu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 刊名：Carbon
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：111
• 期：Complete
• 页码：207-214
• 全文大小：1906 K

文摘

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.