E3S Web Conf.
Volume 16, 201711th European Space Power Conference
|Number of page(s)||4|
|Section||Energy Storage: Future Developments in Energy storage|
|Published online||23 May 2017|
High Specific Energy Lithium Cells for Space Exploration
1 Democritus University of Thrace, Kimmeria Campus 67100 Xanthi, Greece
2 CERTH, 6 th km. Charilaou-Thermi Rd., GR570 01, Thermi, Thessaloniki, Greece
3 ESA/ESTEC, PO Box 299, 2200 AG Noordwijk, The Netherlands
The paper discusses development under an ESA TRP activity (Contract No. 4000109879/13/NL/LvH) with a target of high specific energy Lithium-ion cells, capable of operating under low temperature conditions, i.e. −40 °C. Such cells may be encountered in future exploration missions, which do not consider the use of Radioisotope Heater Units. During the activity, ≥1 Ah silicon-based high energy density prototype cells, following components characterization and optimization, were designed, developed, manufactured and tested under room and subzero temperature conditions down to −40 °C.
The developed and tested prototype cells exhibited energy density of around 208 Wh/Kg at room temperature under C/10 charge-discharge rate within voltage range of 2.8 V and 4.1 V. Moreover, the prototype cells could retain and deliver more than 75% of their capacity at room temperature upon cycling at −40 °C, demonstrating an energy density of 140 Wh/kg.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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