CaO impregnated highly porous honeycomb activated carbon from agriculture waste: symmetrical supercapacitor study

• Main Authors: Ali, Gomaa A. M., Habeeb, Omar Abed, Algarni, H., K. F., Chong
• Format: Article
• Language: English
• Published: Scientific Research 2019
• Subjects: QD Chemistry
• Online Access: http://umpir.ump.edu.my/id/eprint/23675/1/49-CaO%20impregnated%20highly%20porous%20honeycomb%20activated%20carbon%20from%20agriculture%20waste%20%20symmetrical%20supercapacitor%20study1.pdf; http://umpir.ump.edu.my/id/eprint/23675/; https://doi.org/10.1007/s10853-018-2871-6

This study presents the electrochemical studies of activated carbon prepared from palm kernel shell (ACPKS), with CaO impregnation. The CaO is obtained from chicken eggshell waste to produce CaO/ACPKS, which shows highly porous honeycomb structure with homogeneous distribution of CaO nanoparticles (30–50 nm in size). The prepared materials are evaluated as supercapacitor electrodes by testing their electrochemical characteristics. A high specific capacitance value of 222 F g−1 at 0.025 A g−1 is obtained for CaO/ACPKS, which is around three times higher than that for ACPKS (76 F g−1). In addition, electrochemical impedance data show lower impedance for CaO/ACPKS. Lastly, a practical symmetrical supercapacitor is fabricated by CaO/ACPKS and its performance is discussed.