Lithium Iodide as a Promising Electrolyte Additive for Lithium–Sulfur Batteries: Mechanisms of Performance Enhancement

作者：Feixiang Wu, Jung Tae Lee, Naoki Nitta, Hyea Kim, Oleg Borodin, Gleb Yushin · 发表于：Advanced Materials · 年份：2014 · DOI：10.1002/adma.201404194 · 被引用次数：353 · 研究领域：Advanced Battery Materials and Technologies、Advancements in Battery Materials、Advanced Battery Technologies Research

Lithium Iodide (LiI) is reported as a promising electrolyte additive for lithium-sulfur batteries. It induces formation of Li-ion-permeable protective coatings on both positive and negative electrodes, which prevent the dissolution of polysulfides on the cathode and reduction of polysulfides on the anode. In addition to enhancing the cell cycle stability, LiI addition also decreases the cell overpotential and voltage hysteresis.