（1. Department of Chemistry, College of Sciences, Shanghai University, （2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
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DOI:
10.7502/j.issn.1674-3962.2015.12.11
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Abstract:
The Li-Air battery with high energy density is considered as one of important energy storage technologies which can be applied in electric vehicles. However, the practical application of Li-Air battery is currently prevented by the slow kinetic rates of discharge/charge reactions, which further results in many electrochemical problems such as high overpotential, poor cyclic performance, low current density, unstable electrodes, and electrolyte decomposition. Developing highly active catalysts in oxygen reduction (ORR) and oxygen evolution (OER) reactions is a hot research topic of Li-Air battery. Directly observing these reactions mechanisms is a challenging task since they occur in the interface between cathodes and Li2O2. The experimental techniques and first-principles calculations are used to reveal catalytic reaction mechanism and develop novel high active catalysts, which have become increasingly important. Herein, we review the interfacial interaction between catalyst and Li2O2 with the aim to make a correlation of catalytic activity with electron transfer, interfacial structure, and adsorption energy of O2 and Li2O2. These discussions are helpful to reveal catalytic descriptor of ORR and OER, design catalytic surface structure and predict new crystal structure, and improve electrochemical performance.