Synthesis of a MnO₂-graphene foam hybrid with controlled MnO₂ particle shape and its use as a supercapacitor electrode

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• 作者：Xiaochen Dong ; Xuewan Wang ; Jing Wang ; Hao Song ; Xingao Li ; Lianhui Wang ; Mary B. Chan-Park ; Chang Ming Li ; Peng Chen
• 刊名：Carbon
• 出版年：2012
• 出版时间：November, 2012
• 年：2012
• 卷：50
• 期：13
• 页码：4865-4870
• 全文大小：988 K

文摘

A simple approach was developed to synthesize the three-dimensional (3D) hybrid of manganese dioxide (MnO₂) and graphene foam. The morphology of the MnO₂ nanostructures can be readily controlled by the solution acidity. Furthermore, we demonstrate that, serving as a free-standing supercapacitor electrode, this novel three-dimensional hybrid gives a remarkable specific capacitance (560 F/g at the current density of 0.2 A/g) and excellent cycling stability.