Sustainable energy storage in supercapacitors using agro-waste materials
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Date
2023-05
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CCSHAU, Hisar
Abstract
Eco-friendly and low-cost agro-waste derived novel materials have been fascinated a lot of attention to generating porous activated carbon (AC), graphene oxide (GO), biochar, etc, with specific surface parameters (surface area, pore size, pore volume) required for energy storage applications. In this work, paddy straw and sugarcane bagasse, the agro-waste, are utilized to synthesize AC and GO. As-produced ACP-5M acquired a high SSA of 1358 m2 g-1 with hierarchical pore configuration. In order to enhance the electrochemical performance of ACP and GO were composited with manganese oxide to increase the active sites. The prepared materials were characterized using different characterization tools like XRD, FTIR, FR-SEM, BET, XPS and TEM. The electrochemical was tested using CV, GCD and EIS techniques. The composite of MnO2 with ACP-5M obtained the specific capacitance of 438 F g-1 in 6 M KOH aqueous electrolyte with a specific energy of 60.8 Wh kg-1 at a specific power of 500 W kg-1. In addition, the symmetric device fabricated using this material offers a specific capacitance of 239 F g-1 with a specific energy of 65.06 Wh kg-1 at a specific power of 699.2 W kg-1. Hence, these findings suggest that all the synthesized electrode materials can be applied as efficient and effective electrode materials in high-performance supercapacitors.