Recently, the research group of the Clean Energy Chemistry and Materials Laboratory of the Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences and the researcher of the State Key Laboratory of Oxo Synthesis and Selective Oxidization cooperated with the research group of Yan Xingbin, published on the oxidation of manganese on Adv. Funct. Mater. Review articles on the application of lithium bromide in lithium-air batteries (Advances in Manganese-Based Oxides Cathode Electrocatalysts for Li-Air Batteries, DOI: 10.1002/adfm.201704973). Related content was reported by Materials Views and was incorporated into Advanced Functional Materials. February 2018 Hot Top Articles Ranking 10.
As a new type of electrochemical energy storage device, lithium-air battery has attracted the attention of researchers because of its extremely high energy density and environmental friendliness. However, it has a serious delay in the anode surface of lithium-air batteries. The problem of oxygen reduction/precipitation reaction kinetics causes the overall electrochemical performance of the lithium-air battery to be unsatisfactory, which is one of the key problems that restrict the commercial application of the lithium-air battery. Therefore, development of a highly efficient and inexpensive oxygen reduction/precipitation catalyst Is an effective strategy to improve the electrochemical performance of lithium-air batteries.
Yan Xingbin's research group has devoted many years to the structural design of transition metal oxide-based positive electrode catalysts and the study of the nucleation and growth laws of discharge products. The previous studies have been conducted through the design of one-dimensional tubular δ-MnO2, δ-MnO2/carbon composite electrode materials and cores. The shell-structured Co/CoO surface-modified graphene-carbonized melamine sponge material significantly improves the specific capacity and cycle performance of the lithium air battery, and achieves controlled growth of the discharge product; Lithium ions are faced according to different metal oxide specific crystals Different from the adsorption capacity of oxygen molecules, a high-performance α-MnO2/Co3O4 composite oxygen electrode with controlled size and distribution of discharge products was designed. On the basis of the above research results, relevant researchers comprehensively summarized manganese-based oxide electrocatalysts. Research progress in lithium air battery applications.
This review comprehensively summarizes the reaction mechanism of lithium-air batteries. Based on the crystal structure of manganese-based oxides and the valence state classification of manganese, the system comprehensively elucidates the design strategy of oxides, crystal structure, chemical composition, and microphysical parameters. Factors such as its oxygen reduction/oxygen evolution activity and the overall performance of the lithium-air battery. Based on this, the key issues and scientific challenges that are currently urgently needed to be solved in the lithium-oxygen electrochemistry are proposed and proposed. Future research directions and opportunities in this field provide guidance for the design of highly efficient manganese oxide electrocatalysts.
