Issue 21, 2014

AFM study of oxygen reduction products on HOPG in the LiPF6–DMSO electrolyte

Abstract

Ex situ atomic force microscopy (AFM) has been used to study the morphology of oxygen reduction products in the LiPF6–dimethyl sulfoxide (DMSO) electrolyte, i.e. Li2O2 on a highly oriented pyrolytic graphite (HOPG) surface. Both cyclic voltammetry and chronoamperometry have shown that at low cathodic polarization the initial deposits decorate the edge steps of HOPG. At higher overpotentials a massive deposit covers the terraces. Upon charging the battery cathode Li2O2 oxidation and dissolution do not take place until high overpotentials are reached at which solvent decomposition has been demonstrated by in situ FTIR studies.

Graphical abstract: AFM study of oxygen reduction products on HOPG in the LiPF6–DMSO electrolyte

Supplementary files

Article information

Article type
Paper
Submitted
01 nov. 2013
Accepted
16 dic. 2013
First published
18 dic. 2013

Phys. Chem. Chem. Phys., 2014,16, 9925-9929

AFM study of oxygen reduction products on HOPG in the LiPF6–DMSO electrolyte

S. E. Herrera, A. Y. Tesio, R. Clarenc and E. J. Calvo, Phys. Chem. Chem. Phys., 2014, 16, 9925 DOI: 10.1039/C3CP54621G

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