In situ monitoring of the Li–O2 electrochemical reaction on nanoporous gold using electrochemical AFM†
Abstract
The lithium–oxygen (Li–O2) electrochemical reaction on nanoporous gold (NPG) is observed using in situ atomic force microscopy (AFM) imaging coupled with potentiostatic measurement. Dense Li2O2 nanoparticles form a film at 2.5 V, which is decomposed at 3.8–4.0 V in an ether-based electrolyte.