Risk of hydrogen sulfide releasing in lithium–sulfur battery under accident condition.

Lithium–sulfur batteries as one of the most promising technologies for energy storage applications have been attracting increasing attentions. A crucial challenge for the commercialization of lithium–sulfur batteries is the poor stability of lithium sulfide against moisture, which may lead to the release of toxic hydrogen sulfide gas. However, the risk of hydrogen sulfide releasing from lithium–sulfur batteries under the limiting conditions is still unclear. In this paper, we herein investigate the mechanism of hydrogen sulfide releasing in lithium–sulfur batteries, and evaluate the effect of battery discharging on the generation of hydrogen sulfide. The production of sulfion and hydrogen sulfide is qualitatively/qualitatively studied. According to above results, the behavior of hydrogen sulfide formation in the batteries is elucidated based on thermodynamic simulation. Furthermore, the effect of discharging of lithium–sulfur batteries on the hydrogen sulfide releasing is qualitatively calculated. These results show that the hydrogen sulfide is indeed produced from the discharging products of lithium–sulfur battery under the acid condition, the findings can also provide some guidelines or suggestions for the practical applications of lithium–sulfur battery. [ABSTRACT FROM AUTHOR]