@article{bibcite_8762, author = {S. Kandhasamy and G. Nikiforidis and G. J. Jongerden and E. F. Jongerden and M. C. M. van de Sanden and M. N. Tsampas}, title = {Operational strategies to improve the performance and long-term cyclability of intermediate temperature sodium-sulfur (IT-NaS) battery}, abstract = {Based on the preliminary investigation of the intermediate temperature sodium-sulfur (IT-NaS) battery (150 {\textdegree}C), herein we advance this energy storage system, by re-tuning the catholyte formulation; namely i) concentration, ii) layer thickness and iii) cut-off limits during galvanostatic charge-discharge cycling, lowering the operating temperature and improving cell design. The systematic implementation of these strategies boosted the cell performance markedly, delivering 112 mAh/g-sulfur, 90\% of its theoretical specific capacity (125 mAh/g-sulfur), and 50 deep reversible charge-discharge cycles with coulombic and round-trip energy efficiencies of 97 {\textpm} 3\% and 73 {\textpm} 4\%, respectively. Along with the stability and improvement of cycle life, this study demonstrates, for the first time, the practicality of the tubular IT-NaS technology at a temperature as low as 125 {\textdegree}C. }, year = {2021}, journal = {ChemElectroChem}, volume = {8}, pages = {1156-1166}, month = {03/2021}, doi = {10.1002/celc.202100223}, language = {eng}, }