原位透射电镜技术在电化学储能领域的研究进展

Recent Progress of in situ Transmission Electron Microscopy on Electrochemical Energy Storage

理解电极材料的微观电化学行为、微观结构演变和反应机理,对开发高性能电化学储能材料具有重要意义,并有望为优化高性能电化学储能器件的设计提供帮助。在透射电子显微镜(TEM)中构建微型电池,可以直接观察在电池工作状态下电极材料的形貌、成分和微观结构演变,从动力学角度理解电极材料转化和存储的过程和机制,构建电极材料微观结构-宏观性能的构效关系。综述了近年来利用原位TEM研究锂离子电池重要电极材料、锂硫电池和锂-空气电池的最新研究进展,讨论并展望了原位TEM技术在电化学储能领域的未来发展趋势。原位TEM技术对于研究理解在电池工作状态下电极材料的电化学反应行为和机理具有重要的价值,对于深入理解电池失效过程和设计高性能电池具有重要的指导意义。

Understanding the microelectrochemical behavior,microstructure evolution and reaction mechanism of electrode materials is of great significance to explore high-performance electrochemical energy storage materials,and is expected to optimize the design of high-performance electrochemical energy storage devices.By constructing a micro-battery in transmission electron microscope(TEM),the morphology,composition and microstructure evolution of electrode materials in the working state of the battery can be directly observed,which can help us understand the process and mechanism of electrode material during the conversion and storage process from the viewpoints of dynamics,and construct the relationship between microstructure and macro-performance.In this review,the recent research progress of the important materials of lithium-ion batteries,lithium-sulfur batteries and lithium-air batteries by using in situ TEM techniques are summarized.Finally,perspectives on future directions on the application of in situ TEM in electrochemical energy storage studies are provided.In situ TEM has important research value for understanding the electrochemical reaction behavior and mechanism of electrode materials in the working state of the battery,and has important guiding significance for understanding the failure process of the battery and designing high-performance batteries.