Recent Developments in Surface/Interface Modulation and Structure-Performance Relationship of Cathode Catalysts for Li-Air Batteries

Authors

Rui GAO, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China;
Jun-kai WANG, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China;
Zhong-bo HU, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China;
Xiang-feng LIU, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China;Follow

Corresponding Author

Xiang-feng LIU(liuxf@ucas.ac.cn)

Abstract

Lithium-air battery has been considered to be one of the most promising secondary battery systems because of its high energy density. However, the sluggish kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) on the cathode, and the high overpotential, poor cycle stability and low rate capacity have severely blocked the development and application of Li-air battery. One of the effective strategies to alleviate these issues is to develop cathode catalysts for Li-air batteries. The design and development of bifunctional cathode catalysts with high activity and efficiency on both ORR and OER is highly desired for Li-air battery.The surface or interface structure has a significant impact on the catalytic performance. In this review, the recent progress in surface/interface modulation and structure-performance relationship of the cathode catalysts for Li-air batteries is summarized. The aspects of crystal plane effect, defect engineering, and surface-interface synergetic design have all been reviewed, which also include the recent results from the authors’ group. The new lithium-air battery system based on lithium superoxide with large rate capability and ultra-low overpotential is also presented. In the last, the key issues and future perspectives are also discussed. Although great progress has been made in the research of lithium-air batteries in recent years, the foundamental scientific issues such as catalytic mechanism and electrochemical reaction mechanism are still unclear. The solution of these problems is of great importance in the design and development of high-efficiency catalysts, and in the development of lithium-air batteries. Therefore, the applications of advanced characterization and analysis techniques should be emphasized in the future research, especially in situ electrochemical characterization technology to analyze the reaction mechanism at catalyst surface/interface, as well as the formation and decomposition process of the reaction products. Combined with the electrochemical performance analysis and theoretical calculation, the mechanism of catalyst action and electrochemical reaction will be revealed, which is of great significance to promote the development of lithium-air battery.

Graphical Abstract

Keywords

lithium-air battery, electrocatalysis, surface/interface modulation, high-energy density, synergistic effect

DOI Link

https://doi.org/10.13208/j.electrochem.180543

Publication Date

2019-02-28

Online Available Date

2018-07-23

Revised Date

2018-07-10

Received Date

2018-06-19

Recommended Citation

Rui GAO, Jun-kai WANG, Zhong-bo HU, Xiang-feng LIU. Recent Developments in Surface/Interface Modulation and Structure-Performance Relationship of Cathode Catalysts for Li-Air Batteries[J]. Journal of Electrochemistry, 2019 , 25(1): 77-88.
DOI: 10.13208/j.electrochem.180543
Available at: https://jelectrochem.xmu.edu.cn/journal/vol25/iss1/6