SYNTHESIS OF ACTIVATED CARBON FROM BAMBOO BIOMASS FOR SUPERCAPACITOR ELECTRODES WITH VARIOUS TYPE OF ELECTROLYTES

• Main Author: Retyo Titani, Fena
• Format: Theses
• Language: Indonesia
• Subjects: Teknik kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/74307
• Institution: Institut Teknologi Bandung

<p align="justify">Supercapacitors are energy storage media that have high capacitance, long life time and good electrical conductivity performance. Supercapacitor electrodes derived from biomass as activated carbon materials have high power and energy capabilities because they have high surface area, good conductivity, and the ability of activated carbon to optimize the properties of their supercapacitors. The abundant availability of bamboo in Indonesia can be used as raw material for activated carbon. Bamboo powder as raw materials are pre-treated first by deashing and without deashing. The manufacture of activated carbon is carried out by several ways of synthesis including 2-stage pyrolysis, hydrothermal and surface modification of activated carbon using urea doping. The activated carbon that has been obtained is used for electrodes of supercapacitor cells using a variety of electrolyte types 6M KOH, 2M Na2SO4 and TEABF4. Based on the experimental results, the method of pre-treatment and synthesis of activated carbon increased the yield of activated carbon by the highest value of 35.8%. The pre-treatment deashing process of 2-stage pyrolysis synthesis lowered the surface area value from 1521.55 to 1268.97 m2 g-1 and the pore size from 1.23 to 1.20 nm. Meanwhile, pre-treatment deashing of hydrothermal synthesis decreased the surface area value from 469.374 to 453.764 m2 g-1 and increased pore size from 1.92 to 2.06 nm. The addition of atomic nitrogen doping using urea affects the characteristics of activated carbon. Non-deashing activated carbon by doping lowered the surface area value from 469.374 to 389.073 m2 g-1 and lowered the pore size from 1.92 to 1.19 nm. Meanwhile, deashing activated carbon by doping decreased the surface area value from 453.764 to 376.383 m 2 g-1 and decreased the pore size from 2.06 to 1.37 nm. Pre-treatment method, synthesis has no significant effect on the performance of supercapacitor cells. Meanwhile, the type of electrolyte has a significant effect on the performance of supercapacitor cells from a capacitance value of 37.06 F / g with a energy density value and power density produced of 4.16 Wh kg-1 and 35.47 W kg-1 respectively.