Overpotential Analysis of High-Voltage Seawater Battery Using Silver-Coated Copper Cathode Based on the Butler-Volmer Equation

Gurum Ahmad Pauzi; Rianita Baiti; Amir Supriyanto; Junaidi

doi:10.23960/jemit.v6i2.180

Authors

Gurum Ahmad Pauzi Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung, Bandar Lampung, Indonesia, 35141
Rianita Baiti Universitas Lampung
Amir Supriyanto Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung, Bandar Lampung, Indonesia, 35141
Junaidi Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung, Bandar Lampung, Indonesia, 35141

DOI:

https://doi.org/10.23960/jemit.v6i2.180

Keywords:

the voltaic cell, boost converter, voltage, current, LED

Abstract

The overpotential characteristics of a high-voltage seawater battery system were systematically analyzed, employing a silver-coated copper cathode and a zinc anode. This study evaluated the system's electrochemical performance using a quantitative approach based on the Butler-Volmer equation. The exchange current density and the time-dependent overpotential profile were estimated to gain insight into the electrochemical kinetics involved. A total of 20 voltaic cells were assembled in a series-parallel configuration and subjected to loaded operation for 55 minutes. During the experiment, an exponential decrease in current—from 2.6 mA to 0 mA—was recorded, which was attributed to internal resistance and charge transfer limitations. The modeling process was carried out using nonlinear fitting, through which the exchange current density was found to range between 0.15 and 0.3 mA/cm². The charge transfer coefficient (α) was also determined to be approximately 0.5, indicating a relatively balanced rate of anodic and cathodic reactions. It was demonstrated that the silver coating on the copper cathode significantly enhanced electrochemical activity by improving the catalytic surface, thereby increasing both current response and long-term system stability. These results highlight the potential of surface-modified electrodes in advancing seawater battery technologies.

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References

Asosiasi Energi Kelautan Indonesia. (2022). Potensi Energi Kelautan Indonesia. https://aeki.or.id/potensi-energi-kelautan

Bard, A. J., & Faulkner, L. R. (2001). Electrochemical Methods: Fundamentals and Applications (2nd ed.). Wiley.

Chen, S., Wang, T., & Park, J. (2020). Overpotential evolution in electrochemical cells: A Butler-Volmer approach. Electrochimica Acta, 345, 136216. https://doi.org/10.1016/j.electacta.2020.136216

International Energy Agency. (2023). World Energy Outlook 2023. https://www.iea.org/reports/world-energy-outlook-2023

Kementerian Energi dan Sumber Daya Mineral Republik Indonesia. (2018). Statistik Ketenagalistrikan Nasional 2018. https://www.esdm.go.id/

Kim, Y., Lee, J., & Park, S. (2021). Exponential current decay in galvanic cells: Mechanisms and modeling. Electrochimica Acta, 388, 138626. https://doi.org/10.1016/j.electacta.2021.138626

Kumar, R., & Singh, A. (2023). Modeling of overpotential dynamics in galvanic cells: Impact of kinetic resistance and ion diffusion. Electrochimica Acta, 453, 142196. https://doi.org/10.1016/j.electacta.2023.142196

Li, Y., Lu, Y., Adelhelm, P., Titirici, M. M., & Hu, Y. S. (2020). Intercalation chemistry of graphite: Alkali metal ions and beyond. Chemical Society Reviews, 49(7), 2626-2665. https://doi.org/10.1039/C9CS00845K

Li, Y., Wang, L., & Zhang, H. (2022). Performance and corrosion behavior of electrodes in seawater-based voltaic cells for sustainable energy generation. Journal of Electroanalytical Chemistry, 913, 116345. https://doi.org/10.1016/j.jelechem.2022.116345

Liu, X., Zhang, Y., & Chen, L. (2022). Charge transfer coefficient analysis in symmetrical redox reactions based on Butler-Volmer kinetics. Electrochimica Acta, 397, 139099. https://doi.org/10.1016/j.electacta.2021.139099

Martínez, P., Gómez, R., & Torres, F. (2024). Investigating charge transfer coefficients in single-electron redox processes for energy storage applications. Journal of Electroanalytical Chemistry, 918, 116512. https://doi.org/10.1016/j.jelechem.2024.116512

Park, S., & Lee, H. (2023). Estimation of overpotential and internal resistance in seawater-based galvanic cells. Journal of Power Sources, 610, 230789. https://doi.org/10.1016/j.jpowsour.2023.230789

Pauzi, G. A., Riski, K. C., Suciyati, S. W., Junaidi, Surtono, A., Supriyanto, A., & Warsito. (2019). Improvement of Electrical Characteristics of Electrochemical Cells made from Sea Water Using Electroplating Method of Cu (Ag)-Zn Electrode as Renewable Energy Source. Journal of Physics: Conference Series, 1338(1). https://doi.org/10.1088/1742-6596/1338/1/012017

Pauzi, G. A., Samosir, A. S., Sulistiyanti, S. R., & Simanjuntak, W. (2023). Electrochemical Performance of Galvanic Cell with Silver Coated Cathode in One Compartment System Using Seawater as Electrolyte. Science and Technology Indonesia, 8(1). ]https://doi.org/10.26554/sti.2023.8.1.25-31 1.

Rahman, M. M., Kim, J., & Lee, S. (2023). Seawater electrolyte for green energy: Challenges and prospects in electrode stability and system design. Electrochimica Acta, 450, 142073. https://doi.org/10.1016/j.electacta.2023.142073.

Riyanto. (2013). Kimia Dasar: Konsep dan Aplikasinya dalam Kehidupan Sehari-hari. Graha Ilmu.

Singh, R., & Kumar, A. (2023). Modeling of current decay in galvanic cells: Influence of internal resistance and ion transport. Journal of Power Sources, 564, 231345. https://doi.org/10.1016/j.jpowsour.2023.231345

Supian, S., Suryani, D., & Sari, R. M. (2013). Potensi dan Pengembangan Energi Terbarukan di Indonesia. Jurnal Energi dan Lingkungan, 5(2), 45-52.

Wang, J., Zhao, Y., & Chen, H. (2021). Ion diffusion and internal resistance effects on exponential decay of current in electrochemical cells. Electrochimica Acta, 372, 137847. https://doi.org/10.1016/j.electacta.2021.137847

Zhao, Y., Wang, Z., Liu, S., & Zhang, Y. (2019). Silver-coated copper electrodes for high-performance seawater batteries. Journal of Power Sources, 414, 1-8. https://doi.org/10.1016/j.jpowsour.2019.01.010

Zhao, X., Li, J., & Wang, Y. (2021). Kinetic and diffusion effects on overpotential decay in electrochemical energy storage systems. Journal of Power Sources, 485, 229324. https://doi.org/10.1016/j.jpowsour.2020.229324

Zhang, Q., & Chen, X. (2024). Analysis of performance decay in seawater-based batteries: A study on non-linear current reduction. Journal of Power Sources, 601, 233456. https://doi.org/10.1016/j.jpowsour.2024.233456