Understanding Lithium-Mediated Oxygen Reactions at the Au|DMSO interface: Are We There?
2021
Liu, Jinwen | Huang, Jun | Peng, Zhangquan | Liu, Chuntai
Lithium–oxygen (Li–O₂) batteries have received much attention in recent years due to their ultrahigh theoretical specific energy that could transform current energy storage, should a practical device be realized. At the fundamental level, substantial progress in the understanding of the reactions and processes occurring in Li–O₂ batteries has been made; however, significant disputes still remain for the operational mechanisms. Herein, we demarcate the scope of this review to the lithium-mediated oxygen reactions at the Au|DMSO interface. As regards this model electrochemical interface, we first summarize the current understandings of the oxygen reaction mechanisms and the dynamic reaction interfaces, and then, we offer our perspectives on the remaining issues and puzzles, including how the oxygen reaction mechanisms and their associated interfaces are influenced by the electrode surface conditions, the electrolyte compositions, the sensitivity and spatiotemporal resolution of characterization methods, and the operating conditions of the Li–O₂ batteries.
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