Adding Li2S8 as additive in liquid electrolyte (LE) for lithium-sulfur battery (LSB) is one of the most effective strategies which not only suppresses the shuffle effect of lithium polysulfide (LPS) through concentration difference but also maintains the excellent properties of ether-based electrolyte. However, previous researches on this strategy mostly focus on low-concentration Li2S8 additive (no more than 0.2 mol/L), which cannot provide comprehensive understanding of the special role of Li2S8. In this study, high-concentration Li2S8 is selected as the LE additive which is demonstrated inducing two marvelous reconstruction effects that have not been reported both for the cathode and solid electrolyte interphase (SEI). Through these two effects, the cathode and SEI are reconstructed to form denser and more stable structures, ensuring the battery to possess much higher discharge specific capacity and excellent cycle stability, with a Coulombic efficiency (CE) fade of only 0.091% per cycle. This exploration of Li2S8 additive helps to better understand the role of electrolyte additive and how the concentration of it influences the whole battery system.

中文翻译：

---

通过重构正极和SEI对Li2S8作为锂硫电池液体电解质添加剂的新综合认识

添加李2小号8作为锂硫电池 (LSB) 液体电解质 (LE) 的添加剂是最有效的策略之一，它不仅可以通过浓度差抑制多硫化锂 (LPS) 的洗牌效应，而且还能保持醚基电解质的优异性能。 . 然而，以往对该策略的研究大多集中在低浓度的李2小号8添加剂（不超过 0.2 mol/L），无法全面了解锂的特殊作用2小号8. 本研究采用高浓度锂2小号8被选为 LE 添加剂，该添加剂被证明会引起两种奇妙的重建效果，这对于正极和固体电解质界面 (SEI) 均未曾报道过。通过这两种效应，正极和SEI被重构，形成更致密、更稳定的结构，确保电池具有更高的放电比容量和优异的循环稳定性，每个循环的库仑效率（CE）衰减仅为0.091%。此次对李的探索2小号8添加剂有助于更好地了解电解质添加剂的作用以及它的浓度如何影响整个电池系统。