High resolution visualization of the redox activity of Li2O2 in non-aqueous media: conformal layer vs. toroid structure

Sharel P. E; Minkyung Kang; Paul Wilson; Lingcong Meng; David Perry; Andrew Basile; Patrick R. Unwin

doi:10.1039/C7CC09957F

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High resolution visualization of the redox activity of Li₂O₂ in non-aqueous media: conformal layer vs. toroid structure†‡

Sharel P. E,

^ab Minkyung Kang,

^a Paul Wilson,

^a Lingcong Meng,

^a David Perry,

^a Andrew Basile

*^ac and Patrick R. Unwin

*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK
E-mail: p.r.unwin@warwick.ac.uk

^b Department of Chemical Engineering & Biotechnology, University of Cambridge, CB3 0AS Cambridge, UK

^c Institute for Frontier Materials (IFM), Deakin University, Burwood, Victoria 3125, Australia
E-mail: andrew.basile@deakin.edu.au

Abstract

A strong relationship between the surface structure and the redox activity of Li₂O₂ is visualized directly using scanning electrochemical cell microscopy, employing a dual-barrel nanopipette containing a unique gel polymer electrolyte. These measurements reveal considerable local heterogeneity with significantly enhanced electrochemical activity at toroidal Li₂O₂ structures when compared to the conformal layer that is usually formed on the cathode of Li–O₂ batteries.

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Article information

DOI: https://doi.org/10.1039/C7CC09957F
Article type: Communication
Submitted: 30 Dec 2017
Accepted: 19 Feb 2018
First published: 19 Feb 2018

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Chem. Commun., 2018,54, 3053-3056

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High resolution visualization of the redox activity of Li₂O₂ in non-aqueous media: conformal layer vs. toroid structure

S. P. E, M. Kang, P. Wilson, L. Meng, D. Perry, A. Basile and P. R. Unwin, Chem. Commun., 2018, 54, 3053 DOI: 10.1039/C7CC09957F

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Chemical Communications