Fig. 2: Galvanostatic experiment involving Li metal stripping and plating showing three different typical half cycle overpotential variations and corresponding morphologies.

a Overall potential change with time for Li metal stripping and plating experiment using 1 M LiTFSI in TEGDME:DOL 1:1 (v:v) electrolyte and 0.5 mA/cm² current density. b 1^st half-cycle overpotential. c SEM micrograph of the working electrode (undergoing plating) after the 1^st half-cycle in (b) with Li deposits colored brown. d SEM micrograph of the counter electrode (undergoing stripping) after the 1^st half cycle in b). e The negative part of the 5^th cycle of the stripping and plating experiment. f Morphology of the lithium electrode after the 5^th cycle of operation with Li deposits colored in brown. g The negative part of the 20^th cycle of the stripping and plating experiment. h Morphology of the lithium electrode after the 20^th cycle of operation with Li deposits colored brown.