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SYNTHESIS OF MnO2 AS CANDIDATE FOR THE MATERIAL OF SUPERCAPACITORS ELECTRODE WITH GREEN CHEMISTRY METHOD THOUGH HYDROXYLATED YLANG-YLANG FLOWER ESSENTIAL OIL (Cananga odorata) Universitas Negeri Malang Abstract The rapid technological advancement has accelerated the demand for portable electronic devices that require energy storage media. The high-performance supercapacitor is one of the energy storage media with excellent capacitance and a great lifecycle. Currently, various synthesis methods on the electrode component of the supercapacitor have been developed. However, most of that synthesis is not environmentally friendly. This study aims to synthesize MnO2 through a green chemical process with the minimum usage of non-environmentally friendly additives. This study uses ylang-ylang flower essential oil (Cananga odorata) as the raw material. The primary stages of synthesis include the isolation of essential oil from the ylang-ylang frower through the steam-water distillation process, synthesis of MnO2 through dihydroxylation reaction using the ylang-ylang flower essential oil with various calcination temperatures, and the characterization of the produced synthesis using XRD, SEM, and CV. The XRD results show that the MnO2 has been successfully synthesized and generated a number of polymorph of alpha-, gamma-, and delta-. Meanwhile, the highest MnO2 purity has been obtained from 500oC calcination temperature and dominated by the delta-MnO2 polymorph. The results of the SEM test suggest that the synthesized product is in the form of a nano-sized particle with an average diameter of 49.8 nm. The results of the CV test signify that the specific capacitance of MnO2 calcinated at 500oC temperature is 29.21 mF/g so that the synthesized MnO2 is the potential supercapacitor candidate. Keywords: MnO2 synthesize, hydroxylated alkene, ylang-ylang flower essential oil, supercapacitor Topic: Materials Sciences: Synthetic and Characterization |
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