摘要
We demonstrate an efficient and cost-effective strategy to improve electrochemical properties of AC based electrode materials. A series of graphene oxide （GO）-modified activated carbon （AC） composites （GO@ACs） have been prepared as electrode materials for supercapacitors （SCs）. In GO@ACs, AC particles anchored on the surface of GO sheets which were synchronously reduced during charge/discharge process, and formed a 3D-conductive network. Electrochemical analyses revealed that 2.5 wt% GO@AC, which exhibited improved electrical conductivity and high specific capacitance at large current density in organic electrolyte, is a promising electrode material for high-performance SCs. At 6A/g, the specific capacitance of 2.5 wt% GO@AC increased by 249,5% in comparison with that of AC.
We demonstrate an efficient and cost-effective strategy to improve electrochemical properties of AC based electrode materials. A series of graphene oxide （GO）-modified activated carbon （AC） composites （GO@ACs） have been prepared as electrode materials for supercapacitors （SCs）. In GO@ACs, AC particles anchored on the surface of GO sheets which were synchronously reduced during charge/discharge process, and formed a 3D-conductive network. Electrochemical analyses revealed that 2.5 wt% GO@AC, which exhibited improved electrical conductivity and high specific capacitance at large current density in organic electrolyte, is a promising electrode material for high-performance SCs. At 6A/g, the specific capacitance of 2.5 wt% GO@AC increased by 249,5% in comparison with that of AC.
基金
financially supported by the National Natural Science Foundation of China(Nos.21501148,61376008)
the Natural Science Foundation of Zhejiang Province(No.LQ15E030002)
