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Over the past two decades, with the advancement in scientific inventions, the need for energy storage and conversion has increased immensely. Several alternative energy storage technologies such as thin films solar cells, Li-ion batteries and supercapacitors have been developed considerably to account for the ever-growing energy demands. Among different energy devices, supercapacitors have played a dominant role in academia and industry due to their remarkable advantages, such as low cost, high power density, safe operation, long-term stability and fast charge-discharge cycles. The key aspect of developing efficient and cost-effective supercapacitors is the proper choice of electrode materials. In our lab, we employ simple and inexpensive techniques such as chemical bath deposition (CBD), successive ionic layer adsorption and reaction (SILAR) and electrodeposition for metal oxides/hydroxide (La2O3, Ni(OH)2, WO3, MnO2, Fe2O3, CuO), conducting polymers (Polyaniline-composites), metal sulfides (MoS2, CoS, LaS2, Cu4SnS4) and carbon-based composite (graphene, carbon nanotubes (CNT)) material synthesis for supercapacitor applications. Furthermore, we have also focused our interest in fabricating solid-state device supercapacitors for practical applications.