Electrode Materials for Supercapacitors Synthesized By Sol–Gel Process

This review article on synthesis of various carbonaceous and transition metal oxide based supercapacitor electrode materials and their electrochemical performance shows that though a potential method, the sol–gel process needs to be extensively explored and practiced on a large extent. The carbonaceous materials possess high electrochemical stabilities but they demonstrate lower capacitance compared to the ruthenium-based materials. Overall excellence in electrochemical behaviour was exhibited by a binary metal oxide NiCoO₄ in thin film form with a value of 2157 F/g.