Abstract:
In the pursuit of eco-friendly and sustainable energy storage devices, supercapacitors have gain a
lot of attention due to their long cycle life, fast charge/discharge rate and high power density.
The performance of the supercapacitors is mainly based on the properties of the electrode
material, such as carbon based electrodes, mainly graphene-based electrode material serves as
the promising candidates. Cleaner ways for synthesis of graphene-like carbon are highly
expected. Renewable resources such as date seed and olive pomace serves for this purpose. The
research is based on a comparative study of two unconventional biomass resources, date seed
and olive pomace, for the graphene-like carbon synthesis and evaluate their application as
electrode material for supercapacitors. Graphene-like carbon were synthesized via hydrothermal
carbonization followed by acid washing. Electrochemical testing was performed to evaluate olive
pomace and date seed derived graphene-like carbon performance of the synthesized electrode
material. The electrochemical testing results showed that the specific capacitance of 502 F/f &
460 F/g in three cell electrode testing, respectively. Moreover, the olive pomace derived
graphene-like carbon gave the better results and was further evaluated in two cell electrode
testing it gave the specific capacitance of 518F/g. The electrode material was highly stable and
retained the capacitance retention of 96% even after 1000 cycles. Thus, olive pomace derived
graphene-like carbon served as the promising material as electrode material for the application in
supercapacitors.
