Synthesis of activated carbon from black liquor for the application of supercapacitor

Abstract

In this present study, the black liquor carbonization has been investigated by hydrothermal process. The activated carbon from the carbonization of black liquor (AC-BL) and biomass based activated carbon from citrus sinensis avedos (AC-OP) has been investigated for the suitability in supercapacitor application. The study have analysed in electrochemical measurement of both AC-BL and AC-OP in electrochemical station. The role of stable hydroxyl molecules on the surface of carbon material has been observed and its effective conductivity is studied. The superior performance of AC-OP derived nano porous carbon has fast ionic and electronic diffusion of the electrolyte in and out of the pores during charging and discharging due to high surface area. AC-BL exhibited with an EDLC mechanism, but AC-OP shows the pseudo capacitance property. The porous structure and oxygen doping characteristics in AC-BL can in uence the potential electrode material for applications in the eld of supercapacitors. With the help of this movement, electronic conductivity of the AC-BL has been increased. In general, electrochemical stability of the EDLC is far better than pseudo capacitor. From the EIS analysis, ESR value is very small for AC-BL (60 Ω), when compared to AC-OP (155 Ω). To conclude that the EIS results of low conductivity by AC-BL has potential to be future supercapacitor with enhanced treatment in carbonization techniques.

Sustainable Synthesis of Porous Biomass-Derived Carbon from Tecoma capensis for High Performance Supercapacitors: Characterization and Electrochemical Evaluation

“…The elevated charge transfer resistance in 1 M H 2 SO 4 is attributed to the combination of poor electrode conductivity and electrolyte characteristics. These findings provide insight into the electrochemical characteristics of TCL-700 material, confirming its capacity for efficient energy storage and utilization [49].…”