Muhammad Hafidz Ramadhan, Sumari Sumari, Hadi Nur, Nazriati
In this study, the high specific capacitance material based on activated carbon-manganese dioxide (AC/MnO2) composite was prepared by an impregnation method. The MnO2 particle was synthesized via a redox reaction between KMnO4 and lemon peel extract as a bio reductor. The step staken in this research were the preparation of lemon peel extract, then synthesis of MnO2 using lemonpeel extract, synthesis of AC/MnO2 composites, and electrodes characterization using powder XRD,SEM, and CV. According to the results, the AC/MnO2 composite electrode had a higher specific capacitance compared to the synthesized MnO2. The powder XRD test results show that thesyn thesized MnO2 consisted of α, r, and δpolymorphs. SEM data show that the average MnO2 particle size is 482.80 nm. The CV test results show that the highest AC/MnO2 capacitance is188.17 F g-1 which was obtained at an AC/MnO2 ratio is 1:1. This suggests that the AC/MnO2 composite material has the potential to be used as a super capacitor electrode material. © 2024 Trans Tech Publications Ltd, All Rights Reserved.
Chemistry Department, Faculty of Mathematics and Natural Sciences, State University of Malang, Malang, Indonesia; Center of Advance Materials for Renewable Energy (CAMRY), State University of Malang, Malang, Indonesia