For instance, in 2017, Nazar’s group reported Li-rich composite alloy
films synthesized in situ on lithium by the above two
reactions[110]. Due to the lithium alloy and lithium salt composites
together form an artificial SEI layer to protect the lithium anode, it
can sustain electrodeposition over 700 cycles (1,400 h) of repeated
plating/stripping at a practical current density of 2
mA·cm−2 and a 1,500 cycle-life was realized for a cell
paired with a Li4Ti5O12positive electrode. Following then, various lithium alloy-lithium salts
artificial SEI layers have been proposed, and Table 2 made a conclusion.
It can be observed that the metal halides are the most popular
candidates to react with lithium and form an inorganic composite
artificial SEI layers.
Table 2 Various lithium alloy-lithium salts artificial SEI
layers.