Progress and Prospects in Redox Mediators for Highly Reversible Lithium–Oxygen Batteries: A Minireview

作者：Hanyun Zhong, Jing Wang, Yonggang Wang, Ping He, Haoshen Zhou · 发表于：Energy & Fuels · 年份：2021 · DOI：10.1021/acs.energyfuels.1c02844 · 被引用次数：18 · 研究领域：Advanced Battery Materials and Technologies、Advancements in Battery Materials、Advanced battery technologies research

Aprotic lithium–oxygen (Li–O 2 ) batteries have received attention as a result of their high theoretical energy density and potentially low material cost. However, their practical applications are limited by side reactions from extremely active singlet oxygen ( 1 O 2 ), lithium superoxide, and insulated lithium peroxide. The use of redox mediators (RMs) has emerged as a strategy to avoid such irreversible reactions. This review summarizes typical RMs on discharging and charging and their corresponding reaction mechanism. Useful non-electroactive additives are also mentioned for inspiration on RMs preparation. Strategies for suppressing shuttle effects and reducing 1 O 2 -induced degradation are further discussed to achieve high reversibility when using RMs. Finally, prospects and conclusions for reversible Li–O 2 cells are presented.