Zhou Yin, Hong Guo, Zhang Wenjun
Department of Materials Science and Engineering & Center of Super-Diamond and Advanced Films, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China.
ACS Nano. 2024 Jul 2;18(26):16489-16504. doi: 10.1021/acsnano.4c04420. Epub 2024 Jun 20.
Lithium-oxygen (Li-O) batteries have obtained widespread attention as next-generation energy storage systems due to their extremely high energy density. However, the high charge overpotential, attributed to the insulating property of LiO, significantly limits the energy efficiency and triggers solvent degradation. The high electrochemical activities of oxygen reduction reactions (ORR) and oxygen evolution reactions (OER) on the cathode are crucial for alleviating the high charging polarizations and enhancing the lifetime of Li-O batteries, which are also top challenges of state-of-art research. In this review, the scientific challenges and the proposed solutions in the development of cathode catalysts have been summarized. The recent research advancements on the nanoengineering of cathode catalysts for Li-O batteries have been comprehensively discussed, and the perspectives on the structure optimization are presented. Meanwhile, we have elucidated the structure-performance relationship between the electronic state and performance of the cathode catalysts at the nanoscale level. This review intends to provide guidelines for the design and construction of cathode catalysts in advanced Li-O batteries.
锂氧（Li-O）电池因其极高的能量密度作为下一代储能系统而受到广泛关注。然而，由于LiO的绝缘特性导致的高充电过电位，显著限制了能量效率并引发溶剂降解。阴极上氧还原反应（ORR）和析氧反应（OER）的高电化学活性对于减轻高充电极化和延长Li-O电池的寿命至关重要，这也是当前前沿研究的首要挑战。在这篇综述中，总结了阴极催化剂开发中的科学挑战和提出的解决方案。全面讨论了Li-O电池阴极催化剂纳米工程的最新研究进展，并提出了结构优化的观点。同时，我们阐明了纳米尺度下阴极催化剂电子态与性能之间的结构-性能关系。这篇综述旨在为先进Li-O电池中阴极催化剂的设计和构建提供指导。
