
156 Electrochemically Enabled Sustainability
salt (see Section 3.4). It has been demonstrated that lithium metal is stable in
these electrolytes where it can be safely cycled [6]. In addition, these electro-
lytes are particularly suitable for use as separators in lithium–air batteries,
since the well-documented resistance of the PEO ether linkage combined
with the stability towards nucleophiles of most lithium salts (e.g. LiCF
3
SO
3
)
is expected to provide a stable medium. Indeed, the application of PEO-based
electrolytes for safe and efcient lithium–oxygen cells has been reported [62].
The validity of the solid-state Li–air battery was also pro ...