Sodium-ion batteries(SIBs)have attracted increasing attentions in recent years due to the abundance and even distribution of Na resources on the earth.Currently,SIBs still face key scientific issues such as low energy density and unsatisfactory cycling stability.The improvement of the storage performance of SIBs requires a comprehensive and precise understanding of the microscopic mechanisms of sodium storage in their electrode materials.Although extensive in-situ transmission electron microscopy(TEM)investigations have been performed to provide mechanistic insights into the electrochemical performance of anode materials of SIBs,a dedicated review for the in-situ TEM investigations on SIBs is missing in the literature.In this review,recent progress in the in-situ TEM investigations on dynamic transformation and the corresponding morphological,structural and chemical evolutions during the sodium storage process in the SIBs anode materials was summarized,elucidating the conformational correlation between the composition/structure of anode materials and electrochemical performance of sodium-ion batteries.This review aims to provide a reference for the efficient selection and rational design of anode materials for high-efficiency SIBs.
关键词
钠离子电池/负极材料/原位研究/透射电镜
Key words
sodium-ion batteries/anode materials/in-situ study/transmission electron microscopy
维普
万方数据