Preparation of capacitor's electrode from cassava peel waste.
Cassava peel was used as the precursor for activated carbon-based electrodes which were then prepared by a combination of chemical and physical activation. The surface of the activated carbon was treated with the oxidative chemical agents, 98 wt.% H(2)SO(4), 65 wt.% HNO(3), and 30 wt.% H(2)O(2) solutions. The surface modification had no significant effect on the specific surface area, but greatly influenced the surface chemistry of the carbons. The presence of oxygen-containing groups increased the polarity and hydrophilicity of activated carbon, and thus improved the performance of the activated carbon-based electrode. As a result, the specific capacitance of the HNO(3) modified AC-electrode reached 264.08F/g, an increase of 72.6% compared to the original one. The results indicate that cassava peel waste can potentially be applied as a raw material for the production of low cost-high performance activated carbon electrode materials for Electric Double Layer Capacitors (EDLCs).
Ismanto
Andrian Evan
AE
Department of Chemical Engineering, Widya Mandala Surabaya Catholic University Kalijudan 37, Surabaya 60114, Indonesia.
Wang
Steven
S
Soetaredjo
Felycia Edi
FE
Ismadji
Suryadi
S
D004566:Electrodes; D002365:Manihot; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared