Figure 7 SEM images for (a, c) Li electrode and (b, d) Li-Na
alloy electrode with a Na/Li molar ratio of 6 after five
stripping/plating cycles in 0.5 M
NaCF3SO3/TEGDME or
NaCF3SO3/DOL/TEGDME electrolyte.
(Reproduced from ref.[85], with permission from Copyright © 2018 The
Author(s), under exclusive license to Springer Nature Limited.)
While a more common strategy to form an artificial SEI layer is using Li
salts to in-situ react with lithium alloys. It is easy to realize a thin
lithium alloy layers on the surface of Li metal by in situ reduction of
metal salts as shown in Eqns 1[110]: