Tuesday, 31 May 2022: 17:20
West Meeting Room 202 (Vancouver Convention Center)
Activated carbon from biomass cocoa pod husks (ACC) has been synthesized using carbonization process via KOH activation with temperature ranging from 500oC to 800 oC for optimization procedure. The as prepared materials were characterized and the ACC 600 oC sample exhibited better electrochemical properties among the prepared samples, which was used to fabricate an electrode in a symmetric device, using 2.5 KNO3 as neutral electrolyte for supercapacitors’ applications. A sponge-like morphology, amorphous structure and presence of only micropores were observed in the carbon materials. Electrochemical properties of material carbonized at 600 oC (ACC 600 oC) were critically examined, and exhibited a fairly large specific energy of 19 Wh kg-1with corresponding specific power of 453 W kg-1 at 0.5 A g-1 before voltage holding test and Coloumbic efficiency of the material still remained 100% stable after 15000 cycles. Remarkably, specific energy of the device also increased from 19 Wh kg-1 to 30 Wh kg-1 after subjecting the device to a voltage holding test for over 110 hours. The results suggest that cocoa pod husk could be a suitable material for synthesizing porous carbon for supercapacitors’ applications.