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 team of Yan Xingbin and published a report on the oxidation of manganese on Adv. Funct. Mater. A review of recent advances in the use of materials in lithium-air batteries (Advances in Manganese-Based Oxides Cathodic Electrocatalysts for Li-Air Batteries, DOI: 10.1002/adfm.201704973). The related content was reported by Materials Views and was selected as Top 10 in the Advanced Functional Materials February 2018 Hot Top Articles list. 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, the severely stagnant oxygen reduction/precipitation kinetics problems that occur on the anode surface of lithium-air batteries cause the overall electrochemical performance of lithium-air batteries to be unsatisfactory, which is one of the key problems that restrict the commercial application of lithium-air batteries. Therefore, the development of a highly efficient, low-cost oxygen reduction/precipitation catalyst is an effective strategy for improving the electrochemical performance of lithium-air batteries. Yan Xingbin's research group has devoted many years to the study of structural design of transition metal oxide-based positive electrode catalysts and nucleation and growth of discharge products. Previous studies have improved the specific capacity and circulation of lithium-air batteries by designing one-dimensional tubular δ-MnO2, δ-MnO2/carbon composite electrode materials and core-shell Co/CoO surface-modified graphene-carbonized melamine sponge materials. The performance has realized the controlled growth of discharge products; according to the different adsorption capacity of different metal oxide specific crystals facing lithium ions and oxygen molecules, a high-performance α-MnO2/Co3O4 composite oxygen electrode with controlled discharge size and distribution has been designed. . On the basis of the above research results, relevant researchers fully summarized the research progress of manganese-based oxide electrocatalysts in lithium-air batteries. 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, crystal structure, chemical composition, and microphysical parameters of oxides. Factors such as its oxygen reduction/oxygen evolution activity and the overall performance of the lithium air battery. On this basis, the key issues and scientific challenges that the current manganese oxide electrocatalysts urgently need to solve in lithium-oxygen electrochemistry are proposed, and future research directions and opportunities in this field are proposed, so as to design highly efficient manganese oxide electrocatalysts. Provides guiding advice. Pvc Pipe Connection,Pn10 Upvc Pipe,Pipe Solvent Connection,Din Water Supply Upvc Pipe Zhejiang Huangyan Minghua Plastic Pipe Fitting CO.,LTD , https://www.pipefitting-mh.com
Lanzhou Chemical Research Institute released a study of manganese-based oxide electrocatalysts for lithium-air batteries