The Synthesis of Activated Carbon Electrodes from Lotus Seedpods for Supercapacitor Application
Abstract
This research, prepared activated carbon from lotus seedpods (AC-LS) by carbonization and activation processes at 700, 800, and 900 °C, respectively. The structure, morphology, surface area, and electrochemical properties of the samples are investigated by X-ray Diffraction (XRD), Raman spectroscopy (Raman), Field emission scanning electron microscopy (FE-SEM), N2 adsorption-desorption, Cyclic voltammetry (CV) and Galvanostatic charge/discharge (GCD). The activated carbon exhibits a relatively high specific surface area of 631.90 m2/g and an average pores diameter of 3.3 nm. Such the sample shows outstanding capacitive performance (113 F/g at 1 A/g), good rate capability, and excellent cycling stability (96% of capacitance retention after 1,000 cycles at 5 A/g) in 6 M KOH electrolyte. Therefore, the synthesis of activated carbon from the lotus seedpods is that the biomass exists in nature, has a low cost, and high specific surface area. It has suitable to be applied as the electrode material for the supercapacitor.
Keywords: Activated carbon, Lotus seedpods, Carbonization, Electrode, Supercapacitors
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