Large over‐potentials owing to the sluggish kinetics of battery reactions have always been the drawbacks of Li−O₂ batteries, which lead to short cycle life. Although redox mediators have been intensively investigated to overcome this issue, side‐reactions are generally induced by the solvated nature of redox mediators. Herein, we report an alternative method to achieve more efficient utilization of tetrathiafulvalene (TTF) in Li−O₂ batteries. By coordinating TTF⁺ with LiCl during charging, an organic conductor TTF⁺Cl_x⁻ precipitate covers Li₂O₂ to provide an additional electron‐transfer pathway on the surface, which can significantly reduce the charge over‐potential, improve the energy efficiency of Li−O₂ batteries, and eliminate side‐reactions between the lithium metal anode and TTF⁺. When a porous graphene electrode is used, the Li−O₂ battery combined with TTF and LiCl shows an outstanding performance and prolonged cycle life.

中文翻译：

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改性四硫富瓦烯作为有机导体，用于改善Li-O2电池的性能

Li-O ₂电池的缺点一直是由于电池反应动力学缓慢而导致的过大电势，这会导致循环寿命缩短。尽管已经对氧化还原介体进行了深入研究以克服这一问题，但通常是由氧化还原介体的溶剂化性质引起的副反应。在本文中，我们报告了另一种方法，可实现Li-O ₂电池中四硫富瓦烯（TTF）的更有效利用。通过协调TTF ⁺充电，有机导体TTF期间用LiCl ⁺氯_X ^-沉淀盖栗₂ ö ₂在表面上提供额外的电子转移途径，可以显着减少电荷过电势，提高Li-O ₂电池的能量效率，并消除锂金属阳极与TTF ⁺之间的副反应。当使用多孔石墨烯电极时，与TTF和LiCl结合使用的Li-O ₂电池表现出出色的性能并延长了循环寿命。