Green and sustainable fallen night jasmine-derived carbon for enhancing the efficiency of supercapacitors

Abstract

Biomass is emerging as a potential candidate to achieve sustainable, clean, and cost-effective electrode materials for energy storage devices. The biomass field is also being explored with low-cost, renewable resources and easy processing techniques. The work depicts the development of effective carbon material preparation by a template-free and facile method using fallen night jasmine and studies its applications in high-performance supercapacitors for the very first time. The as-synthesized FNJDC (Fallen night jasmine-derived carbon) offered a high specific capacitance of 221.87Fg−1 at 0.25 Ag−1 current density. Further, the stability of prepared carbon material was found to be 99.95 % capacitance retention over 10,000 cycles in 1 M H2SO4 electrolyte. The FNJDC also delivers an excellent energy density of 16.64 Whkg−1 at 500 Wkg−1 power density with cyclic stability of 10,000 cycles with very little loss of capacitance in symmetric supercapacitors. Hence, the high specific capacitance and cyclic stability of prepared biomass-derived carbon notably emerged as potential candidates for high-performance energy storage systems.