CNT/High Mass Loading MnO2/Graphene-Grafted Carbon Cloth Electrodes for High-Energy Asymmetric Supercapacitors

CNT/MnO2/graphene-grafted carbon cloth electrode is designed and achieves high MnO2 mass loading (9.1 mg cm−2). The electrode with favorable electronic/ionic conductivity delivers a large areal capacitance and rate capability. The assembled asymmetric supercapacitor yields a large energy density of 10.18 mWh cm−3.