Designing room temperature sodium sulfur batteries with long cycle-life at pouch cell level
Pampel J, Doerfler S, Althues H, Kaskel S (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 21
Pages Range: 41-49
DOI: 10.1016/j.ensm.2019.05.035
Abstract
The successful transfer of room temperature sodium sulfur (RT-Na-S) technology from coin cell to pouch cell level is demonstrated. The general cell design is based on a previously developed RT-Na-S concept implementing hard carbon based anodes. Scalable technologies known from lithium ion battery production are utilized for electrode production. The electrolyte composition, the voltage window as well as the balancing is evaluated on coin cell level leading to optimized parameters. For scaled electrodes and electrolytes, a specific capacity of 418 mAh gS −1 coupled with a high coulombic efficiency of 95.3% can be still obtained in RT-Na-S coin cells after a total of 549 cycles. Residual carbonates in the HC-anode were found to deteriorate the cycling performance. An increased cut-off voltage (1.5 V) significantly raises the coulombic efficiency. Finally, the design is successfully transferred to a 10-layered pouch cell leading to a high energy efficiency of 88.6% and a capacity of 387 mAh gS −1 after a total of 937 cycles. Hence, the present work shows the principle feasibility of a stationary energy storage technology based on RT-Na-S pouch cell technology.
Involved external institutions
Technische Universität Dresden
Germany (DE)
Fraunhofer-Institut für Werkstoff- und Strahltechnik (IWS) / Fraunhofer Institute for Material and Beam Technology
Germany (DE)
Germany (DE)
Fraunhofer-Institut für Werkstoff- und Strahltechnik (IWS) / Fraunhofer Institute for Material and Beam Technology
Germany (DE)
How to cite
APA:
Pampel, J., Doerfler, S., Althues, H., & Kaskel, S. (2019). Designing room temperature sodium sulfur batteries with long cycle-life at pouch cell level. Energy Storage Materials, 21, 41-49. https://doi.org/10.1016/j.ensm.2019.05.035
MLA:
Pampel, Jonas, et al. "Designing room temperature sodium sulfur batteries with long cycle-life at pouch cell level." Energy Storage Materials 21 (2019): 41-49.
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