Abstract
Mesoporous carbon materials derived from the novel biomass of fallen teak leaves were synthesized using versatile, low cost, and environmentally friendly route. Therefore, mesoporous carbon materials were prepared in the monolith form, followed by treatment with the integrated pyrolysis of both carbonization and physical activation. In addition, there are detailed studies and analysis on the influences of chemical activation processes under different concentrations on the textural properties, morphology, crystalline degree, chemical elements and electrochemical performance. These mesoporous carbon possess the highest specific surface area of 489.81 m2 g-1, with a pore volume of 0.293 cm3 g-1, and well-developed mesoporosity. Hence, the electrode of mesoporous carbon for supercapacitor in two electrode system with 1 M H2SO4 , exhibits a high specific capacitance of 280 F g-1 without heteroatom doping. This report provides an effective route to utilize the novel biomass of fallen teak leaves, with the potential benefits of waste reduction and the production of excellent electrode to serve as energy storage materials.
Highlights
Supercapacitors, known as electrochemical double layer capacitance (EDLC), is an adopted strategy for renewable and sustainable resource required in energy storage, and devoid of mass depletion [1, 2]
Teak leaves (TL) waste were collected in the University of Riau, Pekanbaru, Riau province, Indonesia and synthesized into activated carbon monolith using the steps earlier specified (Figure 1); (1) This involved the conversion teak leave into powder, through ball milling 20 hours and sieving into a size of ≤ 53μm; (2) Subsequently, the resulting powder was chemically activated by applying potassium hydroxide (KOH) under various concentration (i.e., 0.2M and 0.4M)
The results indicated possible plant decomposition leading to changes in the polymer structure to carbon atom in the form of released oxygen and hydrogen
Summary
Supercapacitors, known as electrochemical double layer capacitance (EDLC), is an adopted strategy for renewable and sustainable resource required in energy storage, and devoid of mass depletion [1, 2]. This supercapacitors demonstrates a performance between batteries and conventional capacitor integrated with higher power density, fast charge/discharge rate, and prolonged life cycle [3, 4]. Based on the equation Es= 1/2CV2, the energy density, is assumed to expand by increasing the specific capacitance (C) or extending the window voltage (V) [6,7,8]. Electrodes with suitable pore structure are prerequisites for enhanced specific capacitance
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