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Figure 4: In situ compression-electrochemistry evaluation. (a) Optical photograph and schematic of the cell for applying pressure during cycling. (b) In situ compression-electrochemistry evaluation and voltage profiles of MS-Li at 2 mA cm-2 for 2 mA h cm-2. (c) Schematic showing the changes of a sponge-driven elastic interface in the process of Li stripping and plating.