Overall, the combination of high voltage and relatively low mass promotes both sodium and sulfur to be employed as electroactive compounds in electrochemical energy storage systems for obtaining high specific energy, especially at intermediate and high temperatures (100–350 °C). 4.
The substances used in the structure of this battery are harmful to health. Sodium–sulfur batteries provide high energy density of 110 Wh/kg and power density of 150 W/kg . Parts and general appearance of a typical sodium–sulfur battery are given in Fig. 5.12.
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When NaS batteries are used for short-term applications, the power can reach five times the rated power. These devices have a round trip efficiency of 75%, high energy density, low maintenance, 99% recyclability, and low self-discharge [21,22].
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