Boosting High-Performance in Lithium-Sulfur Batteries via Dilute Electrolyte.
Boosting High-Performance in Lithium-Sulfur Batteries via Dilute Electrolyte.
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通过稀释电解质提高锂硫电池的高性能
DOI：
10.1021/acs.nanolett.0c01778
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发表时间：
2020-05
期刊：
影响因子：
10.8
通讯作者：
Yushin Gleb
中科院分区：
文献类型：
--
作者：
Wu Feixiang;Chu Fulu;Ferrero Guillermo A;Sevilla Marta;Fuertes Antonio B;Borodin Oleg;Yu Yan;Yushin Gleb
多硫化物穿梭效应、活性物质损耗、电阻表面层的形成和持续的电解液消耗是采用轻型低成本锂硫(Li-S)电池的主要障碍。通过使用添加剂和最重要的是大幅增加电解液的摩尔分数来调整电解液组成，以前被证明是最有效的策略之一。相反，对于被认为会加剧多硫化物溶解和穿梭效应的LiTFSI/DME/DOL/LiNO3基电解液，很少有人注意到它们的稀释和过稀。在这里，我们挑战了这一传统观点，展示了一种稀电解液(0.1molLiTFSI在二甲醚/DOL中的0.1molLiTFSI和1wt.%LiNO3)电解液的卓越性能，能够更好地润湿电极，大大提高高硫负极的高倍率能力和稳定的循环性能，适用于高硫负荷和低电解液/硫比的Li-S电池。总体而言，这项研究揭示了这种电解质体系抑制短链多硫化物溶解和多硫化物穿梭效应的非凡能力。
Polysulfide shuttle effects, active material losses, formation of resistive surface layers and continuous electrolyte consumption create a major barrier for the lightweight and low-cost lithium-sulfur (Li-S) battery adoption. Tuning electrolyte composition by using additives and most importantly by substantially increasing electrolyte molarity was previously shown to be one of the most effective strategies. Contrarily, little attention has been paid to dilute and super-diluted LiTFSI/DME/DOL/LiNO3 based-electrolytes, which have been thought to aggravate the polysulfide dissolution and shuttle effects. Here we challenge this conventional wisdom and demonstrate outstanding capabilities of a dilute (0.1 mol L-1 of LiTFSI in DME/DOL with 1 wt.% LiNO3) electrolyte to enable better electrode wetting, greatly improved high-rate capability and stable cycle performance for high sulfur loading cathodes and low electrolyte/sulfur ratio in Li-S cells. Overall, the presented study shines light on the extraordinary ability of such electrolyte systems to suppress short-chain polysulfide dissolution and polysulfide shuttle effects.
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影响因子：
4.3
作者：
Feixiang Wu;O. Borodin;G. Yushin
通讯作者：
Feixiang Wu;O. Borodin;G. Yushin
影响因子：
3.9
作者：
K. Sun;Na Li;D. Su;H. Gan
通讯作者：
K. Sun;Na Li;D. Su;H. Gan
一种抑制锂硫电池多硫化物溶解的新型电解液体系
影响因子：
17.1
作者：
Tingzhou Yang;Tao Qian;Jie Liu;Na Xu;Yutao Li;Nicholas Grundish;Chenglin Yan;John B. Goodenough
通讯作者：
John B. Goodenough
影响因子：
19
作者：
Feixiang Wu;Haifeng Lv;Shuangqiang Chen;S. Lorger;V. Srot;M. Oschatz;P. V. van Aken;Xiaojun Wu
通讯作者：
Feixiang Wu;Haifeng Lv;Shuangqiang Chen;S. Lorger;V. Srot;M. Oschatz;P. V. van Aken;Xiaojun Wu
影响因子：
29.4
作者：
Wu, Feixiang;Lee, Jung Tae;Yushin, Gleb
通讯作者：
Yushin, Gleb