Recent Advances in the Development of Single‐Atom Catalysts for Oxygen Electrocatalysis and Zinc–Air Batteries,Advanced Energy Materials

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Recent Advances in the Development of Single‐Atom Catalysts for Oxygen Electrocatalysis and Zinc–Air Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-11-10 , DOI: 10.1002/aenm.202003018
Lishan Peng _{1,

2} , Lu Shang ₃ , Tierui Zhang ₃ , Geoffrey I. N. Waterhouse _{1,

2}

Affiliation

Rechargeable zinc–air batteries (ZABs) are presently attracting a lot of attention for electrical energy storage, owing to their low manufacturing cost and very high theoretical specific energy density. Currently, the large‐scale application of ZABs is hampered by the sluggish kinetics of the oxygen‐reduction reaction (ORR) and oxygen evolution reaction (OER), which underpin battery discharging and charging processes, respectively. In recent years, metal single‐atom catalysts (SACs) have emerged as promising candidates for driving oxygen electrocatalysis in ZABs, offering both high electrocatalytic activity and high metal atom utilization through unique metal coordination environments (typically porphyrin‐like MN_x species on N‐doped carbon supports). Herein, recent breakthroughs in the design of SACs for ORR and OER electrocatalysis are summarized, with a general view towards improving ZAB performance. This Review begins by introducing the operating principles of ZABs and the reaction mechanisms of the ORR and the OER on the air electrode, after which the various types of SAC‐based materials developed to date for oxygen electrocatalysis and ZABs are discussed. Special emphasis is placed on the relationships between the structure of the SAC active site and electrocatalytic performance. Finally, challenges and opportunities for SACs in practical ZABs are explored.

中文翻译：

氧电催化和锌空气电池单原子催化剂开发的最新进展

可充电锌空气电池（ZABs）由于其较低的制造成本和非常高的理论比能量密度，目前在电能存储方面引起了很多关注。目前，ZABs的大规模应用受到氧气还原反应（ORR）和氧气释放反应（OER）的缓慢动力学的阻碍，这分别支撑了电池的放电和充电过程。近年来，金属单原子催化剂（SAC）成为驱动ZAB中氧电催化的有前途的候选者，通过独特的金属配位环境（通常为卟啉样MN _x）提供高电催化活性和高金属原子利用率。N掺杂碳载体上的物种）。本文总结了ORR和OER电催化SAC设计中的最新突破，并从总体上着眼于改善ZAB性能。本综述首先介绍ZAB的工作原理以及空气电极上ORR和OER的反应机理，然后讨论迄今为止开发的用于氧气电催化和ZAB的各种SAC基材料。特别强调SAC活性位点的结构与电催化性能之间的关系。最后，探讨了实用ZAB中SAC的挑战和机遇。

更新日期：2020-12-23

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