Abstract
In the current investigation, we examined hydrothermally reduced graphene oxide (HRGO) as a pivotal electrode material in symmetric supercapacitors, aiming to enhance performance and efficiency in a concise manner. The HRGO electrode surpasses the graphene oxide (GO) electrode, displaying exceptional capacitive behaviour with an impressive specific capacitance of 262 Fg−1 at 1 Ag−1 current density. The symmetric supercapacitor with HRGO achieves a specific capacitance of 75 Fg−1 at 1 Ag−1, coupled with an impressive energy density of 15 WhKg−1 at 600 WKg−1 power density. Notably, it maintains excellent cycling stability over 2000 cycles.
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