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Open Circuit Voltage Characterization of Microporous Silicon Anodes for Lithium Ion Batteries
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| Author(s) |
Hamzeh BEIRANVAND, Sahil SHINGOTE, Ashwin SHEJWALKAR, Jan-Ole STERN, Monja GRONENBERG, Rainer ADELUNG, Stephan WULFINGHOFF |
| Abstract |
Silicon-based Lithium-ion batteries are emerging in industry. Their high energy density promises an optimum solution for e-mobility applications. This paper investigates open-circuit voltage (OCV) characterization methods for microporous silicon (MP-Si) anodes. Two MP-Si samples of the capacity of 2.5 mAh are built in the laboratory. Pulse tests are applied to the two different samples. The OCV of MP-Si measured during charging and discharging are different leading to a hysteresis behavior. MP-Si OCV is approximated by different functions for charging and discharging. Considering the RMS error, polynomial approximation is the best option. A fictitious equilibrium potential is derived based on the difference in energy losses during the charging and discharging and characterized for MP-Si based on the experimental results. |
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| Filename: | 0287-epe2023-full-12535026.pdf |
| Filesize: | 1.761 MB |
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| Type |
Members Only |
| Date |
Last modified 2023-09-24 by System |
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