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Graphene/Carbon Nanotube Films Prepared by Solution Casting for Electrochemical Energy Storage

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6 Author(s)
Juan-Juan Li ; Institute of Advanced Materials , Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu, China ; Yan-Wen Ma ; Xu Jiang ; Xiao-Miao Feng
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Graphene oxide/carbon nanotube (GO/CNT) films with different CNT contents were prepared by a solution-casting method. The oxygen-containing groups on the GO/CNT films were removed by thermal annealing at 200°C and the corresponding hybrid graphene/CNT films were obtained. The graphene/CNT films have good mechanical and electrical properties as well as high stability in electrolyte due to the combination of the film-formation capability of graphenes and the excellent mechanical and electrical properties of CNTs. These graphene/CNT films could be directly used as a supercapacitor electrode without assistance of any binders and metal current collectors, demonstrating good electrochemical capacitance performance with the specific capacitance of 70-110 F/g at a low scan rate of 1 mV/s.

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IEEE Transactions on Nanotechnology  (Volume:11 ,  Issue: 1 )