Open AccessLess Expensive and Eco-Friendly Preparation of Activated Carbon Derived from Coffee Leaf as an Supercapacitors Electrode
Author(s) -
Erman Taer,
Ester Stefani Gultom,
Agustino,
Rika Taslim,
Widya Febriani
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2049/1/012019
Subject(s) - supercapacitor , carbonization , cyclic voltammetry , electrode , materials science , capacitance , activated carbon , carbon fibers , activation energy , analytical chemistry (journal) , environmentally friendly , specific energy , chemical engineering , nanotechnology , electrochemistry , chemistry , composite material , organic chemistry , scanning electron microscope , adsorption , ecology , physics , quantum mechanics , composite number , engineering , biology
In this paper, less expensive and eco-friendly biomass-based activated carbon from coffee leaf (CL) was prepared as electrode materials for supercapacitor applications using KOH activation, carbonization, and physical activation in a CO 2 atmosphere. Using cyclic voltammetry and galvanostatic charge/discharge techniques, the CL sample was tested in a two-electrode configuration operating in 1 M H 2 SO 4 . After physical activation, the percentage reduction of the mass, diameter, thickness, and diameter are 76.47%, 29.38%, 28.57%, and 38.04%, respectively. The CL sample exhibits specific capacitance, energy and power densities of 210 F/g, 29.17 Wh/kg, and 39.99 W/kg at constant current 1 A, respectively. Therefore, the CL sample obtained through KOH activation, carbonization, and physical activation using CO 2 atmosphere has a promising future applied as an electrode material for supercapacitor applications.