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In situ transmission electron microscopy is a powerful tool to capture spatiotemporal evolution of dynamic phenomena. In article number 1804925, Vinayak P. Dravid, Kai He, and co‐workers implement this method to uncover atomic structural evolution of electrochemically reversible phase transformations during lithiation and delithiation of SnSe2, which is promising for lithium‐ion batteries.
2D materials have shown great promise to advance next‐generation lithium‐ion battery technology. Specifically, tin‐based chalcogenides have attracted widespread attention because lithium insertion can introduce phase transformations via three types of reactions—intercalation, conversion, and alloying—but the corresponding structural changes throughout these processes, and whether they are reversible,...
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