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An aqueous, high potential asymmetric supercapacitor (ASC) is developed using cobalt manganite (CoMn2O4) modified graphene nanoribbon (GNR). Combining CoMn2O4/GNR and GNR as different electrodes of supercapacitor in Na2SO4 electrolyte, the ASC device exhibited 1.9V wide potential window for charge storage along with significantly improved capacitive performance than symmetric counterpart. When cycled...
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