Recent advances in cathode catalyst architecture for lithium–oxygen batteries

IF 42.9 Q1 ELECTROCHEMISTRY

eScience Pub Date : 2023-08-01 DOI:10.1016/j.esci.2023.100123

Yin Zhou, Shaojun Guo

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引用次数: 2

Abstract

Lithium–oxygen (Li–O₂) batteries have great potential for applications in electric devices and vehicles due to their high theoretical energy density of 3500 Wh kg⁻¹. Unfortunately, their practical use is seriously limited by the sluggish decomposition of insulating Li₂O₂, leading to high OER overpotentials and the decomposition of cathodes and electrolytes. Cathode electrocatalysts with high oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activities are critical to alleviate high charge overpotentials and promote cycling stability in Li–O₂ batteries. However, constructing catalysts for high OER performance and energy efficiency is always challenging. In this mini-review, we first outline the employment of advanced electrocatalysts such as carbon materials, noble and non-noble metals, and metal–organic frameworks to improve battery performance. We then detail the ORR and OER mechanisms of photo-assisted electrocatalysts and single-atom catalysts for superior Li–O₂ battery performance. Finally, we offer perspectives on future development directions for cathode electrocatalysts that will boost the OER kinetics.

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锂氧电池阴极催化剂结构研究进展

锂氧(Li-O2)电池由于其高达3500 Wh kg−1的理论能量密度，在电动设备和汽车中具有巨大的应用潜力。不幸的是，它们的实际应用受到绝缘Li2O2分解缓慢的严重限制，导致高OER过电位和阴极和电解质的分解。具有高氧还原反应(ORR)和析氧反应(OER)活性的阴极电催化剂是缓解锂氧电池高电荷过电位和提高循环稳定性的关键。然而，构建具有高OER性能和能源效率的催化剂总是具有挑战性的。在这篇综述中，我们首先概述了先进电催化剂的应用，如碳材料、贵金属和非贵金属以及金属有机框架，以提高电池的性能。然后，我们详细介绍了光辅助电催化剂和单原子催化剂的ORR和OER机制，以提高Li-O2电池的性能。最后，展望了未来阴极电催化剂的发展方向，以提高OER动力学。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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eScience

CiteScore

33.70

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0.00%

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