Systematic insight of the behavior of LiNO3 additive in Li-S batteries with gradient S loading

文献类型： 外文期刊

第一作者： Mao, Yangyang

作者： Mao, Yangyang;Li, Tianle;Abuelgasim, Siddig;Hao, Xiaoqian;Xiao, Yupeng;Li, Chongyang;Wang, Wenju;Li, Yuqian;Bao, Encai

作者机构：

关键词： Lithium-sulfur batteries; Solid-electrolyte interphase; lithium nitrate additive; Sulfur loading

期刊名称：JOURNAL OF ENERGY STORAGE （ 影响因子：9.4； 五年影响因子：9.1 ）

ISSN： 2352-152X

年卷期： 2024 年 79 卷

页码：

收录情况： SCI

摘要： Previous studies revealed that LiNO3 can enhance the cyclic stability of lithium-sulfur (Li-S) batteries by creating a solid electrolyte interface protecting the lithium electrode. However, this study investigated the effect of LiNO3 and concentration in the electrolyte, first studied under low and high sulfur loading. It is confirmed that adding a small amount of LiNO3 inhibits the shuttle effect phenomenon in Li-S batteries, and the Coulombic efficiency was significantly improved. Appropriately increasing the concentration of LiNO3 to 2 % could prolong the cycle life. However, when LiNO3 is excessive, the rate and cycling performance decrease. The design of practical Li-S batteries requires more research on the parameters of electrolyte additives under high-sulfur -loading conditions. After gradient increasing the sulfur loading, the low concentration of LiNO3 cannot play the best performance of the battery, so it is necessary to improve the concentration of LiNO3 further. It is evident that adding LiNO3 in Li-S batteries has certain benefits, and the optimal amount of additive is related to the value of sulfur loading.

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