Abstract
The development of low-cost energy storage schemes is imminent in light of the ever-growing demand of electricity. Sodium-sulfur (NaS) batteries offer low-cost technology for energy storage applications due to the intrinsically high capacities of elemental sodium and sulfur as well as their abundant resources. Operating this battery technology on the intermediate range (130-200◦C) can lead to lower material costs, mitigate thermal management and safety issues and enhance cycle life. Herein, an electrochemical study on the cathode of the IT NaS cell is performed at 150◦C and a concentration range of 1.5 to 3 M sodium pentasulfide dissolved in tetraglyme, showing a robust long term performance (42 days of continuous cycling) with a volumetric energy density of 83 Wh L−1. Most importantly, the cell was eligible for a tenfold volume scale-up considerably enhancing its capacity (790 mAh) but in the same time somewhat hindered by mass transport, especially during the end of the discharge process as manifested by electrochemical impedance spectroscopy.
| Original language | English (US) |
|---|---|
| Pages (from-to) | A135-A142 |
| Number of pages | 1 |
| Journal | Journal of The Electrochemical Society |
| Volume | 166 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 12 2019 |
Bibliographical note
KAUST Repository Item: Exported on 2021-12-14Acknowledgements: The authors thank J.J.A Zeebregts (TU.e) for her assistance on the drying of the chemicals, I. Schreuer-Piet (TU.e) for her assistance in SEM measurements and to B. Lamers (DIFFER) for his assistance in the drawing of the cell and I. Dogan (TNO) for the useful discussions. Finally, the authors acknowledge Ionotec Ltd. for cooperation and the delivery of dedicated beta-alumina membranes.
ASJC Scopus subject areas
- Materials Chemistry
- Surfaces, Coatings and Films
- Electrochemistry
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Renewable Energy, Sustainability and the Environment
