Abstract
ABSTRACTIn this work, to increase the specific capacitance and energy density of reduced graphene oxide–silica composite (RGO-SiO2), pseudocapacitive behaviour of polyaniline is introduced to RGO-SiO2(PANI-RGO-SiO2) and further improved by sulfonating the polyaniline system (SPANI-RGO-SiO2). Formation of SPANI-RGO-SiO2 is confirmed from IR and XRD analyses. SPANI-RGO-SiO2 shows nanorods morphology with less crystalline nature. The specific capacitance of RGO-SiO2 is increases from 24 to 780 F g−1 with sulfonation of polyaniline in RGO-SiO2. Retention in the specific capacitance value of SPANI-RGO-SiO2 is 85% with that of its original value of 780 F g−1 with coulombic efficiency (96–99%).
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