Study of anode materials for sodium-ion batteries by in situ transmission electron microscopy
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.
sodium-ion batteriesanode materialsin-situ studytransmission electron microscopy
陆佳宁、张智、高义华、邹进
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华中科技大学物理学院&武汉光电国家研究中心,湖北武汉 430074
Materials Engineering & Centre for Microscopy and Microanalysis,The University of Queensland,St.Lucia,QLD 4072,Australia
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