Fig. 5
From: Designable ultra-smooth ultra-thin solid-electrolyte interphases of three alkali metal anodes
Electrochemical performance of polished and soaked Li anodes. a, c, e Voltage profiles of symmetric Li cells with soaked or polished Li thin-film electrodes using electrolyte of 1 M LiTFSI/DME-DOL. b, d, f SEM images of soaked Li electrode (b) and polished Li electrodes with O–I (d) and I–O–I structured SEI (f) after 100, 100 and 400 cycles, respectively. Scale bars are 10 μm (left images of b, d, f) and 50 μm (right images of b, d, f). g–i Coulombic efficiency (g), voltage profiles (h) and voltage hysteresis (i) of Cu||Li cells at 2 mA cm–2. Both the Cu substrate and Li foil were covered by the as-prepared I–O–I SEIs
