Abstract
Geothermal sludge (GS) from Dieng geothermal power plant has high Silica (SiO2) content. Silica is a functional material in industrial application. This work reported preparation of anode active material from GS silica material for li-ion battery application. The anode active material was prepared by a series of processes as follows: acidification with 3% HCL, silica extraction with 3 M NaOH and 1 M HCL, silica purification with 37% HCL, metallothermal, and combustion. Chemical composition of the samples after metallothermal process (M1) contains the pure Si of 2.26% and increased after combustion process (M1P) to 10.60%. The electrochemical measurement was conducted using a cylindrical full cell battery 18650 with NCA as cathode. The specific discharge capacity for samples of M1P, M1 and graphite are 761.16, 605.56 and 314.45 mAhg−1, respectively. These results show that GS can be used as a raw material for anode active materials in li-ion battery applications.
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Acknowledgements
The authors thank to Ministry of Research, Technology and Higher Education of the Republic of Indonesia for the financial support through the research grant of “Penelitian Dasar”, Contract number: 719/UN27.21/PN/2019, Cornellius Satria Yudha for the assistance in the measurement of electrochemical property and discussion.
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Widiyandari, H., Wijareni, A.S., Ardiansyah, R., Purnama, B., Purwanto, A. (2020). Preparation of Anode Active Material by Utilizing of Silica from Geothermal Sludge for Li-Ion Battery Application. In: Sabino, U., Imaduddin, F., Prabowo, A. (eds) Proceedings of the 6th International Conference and Exhibition on Sustainable Energy and Advanced Materials. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-4481-1_75
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DOI: https://doi.org/10.1007/978-981-15-4481-1_75
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