Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10131128 | Electrochimica Acta | 2018 | 25 Pages |
Abstract
A novel rGO/V2O5 hybrid aerogel composite made up of vanadium pentoxide nanospheres embedded in graphene sheets was synthesized by an easy hydrothermal method. V2O5 with a loading of only 12â¯wt% in composite played a significant pseudocapacitance role. To obtain better material, an annealing process in a tube furnace was used. The final rGO/V2O5 electrode showed excellent electrochemical performance, achieving a specific capacitance of 384â¯Fâ¯g-1â¯at 0.1â¯Aâ¯gâ1 and of 197â¯Fâ¯g-1â¯at 2â¯Aâ¯gâ1. The rGO/V2O5 functioned as the anode and graphene functioned as the cathode in an asymmetric supercapacitor used in an organic electrolyte resulted in a wide potential operating window of 2.5â¯V and delivered a maximum energy density of 80.4â¯Wh kgâ1 (275â¯Wâ¯kgâ1) at 0.2â¯Aâ¯gâ1. In addition, the device possessed acceptable cyclic stability, with only 17.8% loss after 10000 cycles at 2â¯Aâ¯gâ1. All of these outstanding properties could make the electrode material prepared in this study a promising application material for supercapacitors.
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Authors
Zhangming Liu, Haiyan Zhang, Qiao Yang, Yaowu Chen,