Abstract
Due to continuous progress in science and technology and the pressure to seek low cost, green materials for electrochemical devices have led to discover the possibility to use natural rubber (NR) as a polymer for electrolytes. This study reports about modifying Sri Lankan NR and using it for a solid polymer electrolyte in fabricating super capacitors with natural graphite electrodes. Solid polymer electrolyte was prepared using methyl grafted NR as the polymer and magnesiumtrifluoromethanesulfonate as the salt. The composition, 1 NR: 0.80 magnesiumtrifluoromethanesulfonate showed the maximum room temperature conductivity of 3.36 × 10–3 Scm−1. Capacitive features were dominant at low frequencies. Initial single electrode specific capacitance was about 32 Fg−1 whereas the initial single electrode specific discharge capacitance was about 12.8 Fg−1. Even though the values are not very high, they are highlighting the suitability to launch further studies to enhance performance of super capacitors with NR based electrolytes.
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Acknowledgements
HGNR and KSP acknowledge the assistance extended by National Research Council, Sri Lanka (NRC – 17-006). All authors acknowledge the support given by Wayamba University of Sri Lanka and Rubber Research Institute of Sri Lanka to carry out the investigations.
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Rajapaksha, H.G.N., Perera, K.S., Vidanapathirana, K.P. et al. Preparation of methyl grafted natural rubber and its application in super capacitor electrolytes. J Rubber Res 26, 415–424 (2023). https://doi.org/10.1007/s42464-023-00225-3
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DOI: https://doi.org/10.1007/s42464-023-00225-3