Volume 205, 2017

Shell isolated nanoparticles for enhanced Raman spectroscopy studies in lithium–oxygen cells

Abstract

A critical and detailed assessment of using Shell Isolated Nanoparticles for Enhanced Raman Spectroscopy (SHINERS) on different electrode substrates was carried out, providing relative enhancement factors, as well as an evaluation of the distribution of shell-isolated nanoparticles upon the electrode surfaces. The chemical makeup of surface layers formed upon lithium metal electrodes and the mechanism of the oxygen reduction reaction on carbon substrates relevant to lithium–oxygen cells are studied with the employment of the SHINERS technique. SHINERS enhanced the Raman signal at these surfaces showing a predominant Li2O based layer on lithium metal in a variety of electrolytes. The formation of LiO2 and Li2O2, as well as degradation reactions forming Li2CO3, upon planar carbon electrode interfaces and upon composite carbon black electrodes were followed under potential control during the reduction of oxygen in a non-aqueous electrolyte based on dimethyl sulfoxide.

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Article information

Article type
Paper
Submitted
28 Apr 2017
Accepted
17 May 2017
First published
17 May 2017
This article is Open Access
Creative Commons BY license

Faraday Discuss., 2017,205, 469-490

Shell isolated nanoparticles for enhanced Raman spectroscopy studies in lithium–oxygen cells

T. A. Galloway, L. Cabo-Fernandez, I. M. Aldous, F. Braga and L. J. Hardwick, Faraday Discuss., 2017, 205, 469 DOI: 10.1039/C7FD00151G

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