Erman Taer, - and Apriwandi, - and Widya Febriani, - and Rika Taslim, - (2022) Suitable Micro/Mesoporous Carbon Derived from Galangal Leaves (Alpinia galanga L.) Biomass for Enhancing Symmetric Electrochemical Double-layer Capacitor Performances. ChemistrySelect, 7. ISSN 2365-6549

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Abstract

Recently, micro/mesoporous biomass-based functional carbon as an excellent electrode material and energy storage device has attracted massive attention due to the availability of abundant raw materials, adaptability to pore structure, good chemical-physical behaviors, high conductivity, enhanced en- ergy density, and long life cyclic stability. This study performs micro/meso carbon from the novel galangal leaves biomass through KOH and CO2 activation as electrodes material for symmetric supercapacitors. The activated carbon obtained showed a clear hierarchical pore structure with an excellent micro:meso ratio of 56.72%:43.28% which caused their high electrochemical properties. The carbon was further assembled into electrodes through a binder-free solid disc designed to assess the electrochemical performance as a supercapacitor. The results indicated that the galangal leaves-based adapted micro/mesoporous carbon obtained a high specific capacitance of 161 Fg 1 at 1 Ag 1 . Additionally, the symmetric super- capacitor had a specific capacitance retention rate of 78% at 10 mVs 1 and low resistance in the aqueous electrolyte of 1 M H2SO4. The maximum energy density was 19.53 Whkg 1 at an optimum power density of 132.32 Wkg 1 . Therefore, the appropriate micro/mesopores carbon ratio based on the novel galangal leaves biomass can be considered as a good electrode material for high-performance supercapacitor.

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