A nanocomposite of needle-like MnO2 nanowires arrays sandwiched between graphene nanosheets for supercapacitors

作者：Song Hongfang; Li Xinlu^*; Zhang Yonglai; Wang Hao; Li Hongyi; Huang Jiamu

来源：Ceramics International, 2014, 40(1): 1251-1255.

DOI：10.1016/j.ceramint.2013.06.044

• Graphene
• Manganese dioxide
• Supercapacitor

A nanocomposite of needle-like MnO2 nanowires arrays-graphene (NMNAG) is synthesized by in-situ growth of MnO2 nanowires on the surface of graphene nanosheets (GNS), resulting in a sandwich nanoarchitecture hybrid. The preparation is a simple redox reaction between potassium permanganate (KMnO4) and GNS, which is facile to produce in large scale at low cost. The nanocomposite exhibits high-capacitance performance (276 F g(-1) at 0.5 A g(-1)), excellent rate capability (62.7% capacity retention at 60 A g(-1)), stable cycleability (no degradation after 1200 cycles) and a maximum power density of 21.6 kW kg(-1).

• 出版日期2014-1
• 单位重庆大学