锂-空气电池MnO_2和Co_3O_4正极催化剂的研究进展

Research progress of MnO_2 and Co_3O_4 as cathode catalysts for lithium-air batteries

锂-空气电池因具有超高的理论能量密度,被认为是最具发展前景的新一代储能系统。然而,正极缓慢的电极反应成为制约其发展的关键因素之一。催化剂的加入可以有效降低锂-空气电池的过电位,进而提高正极反应的速率。本文首先简要介绍了锂-空气电池的基本结构和工作原理,随后详细综述了近年来用于锂-空气电池正极的过渡金属氧化物(二氧化锰和四氧化三钴)催化剂的研究进展,最后根据目前所存在的问题指出未来的研究方向。

Lithium-air batteries are considered as the most promising energy storage devices due to their ultrahigh theoretical energy density. However, Sluggish kinetics of cathode reactions is one of the key factors limiting the development of lithium-air batteries. The overpotential of the lithium-air batteries can be reduced effectively by adding catalyst, and the reaction rate of the oxygen electrode can be improved accordingly. Firstly, the structures and principles of lithium-air batteries are discussed in this review. Then the recent research progress of transition-metal oxides （manganese dioxide and cobaltosic oxide） as cathode catalysts for lithium-air batteries are reviewed. Finally, future research directions in the field are proposed based on the existing problems.