No Cover Image

Journal article 657 views 117 downloads

Solvent-Mediated Control of the Electrochemical Discharge Products of Non-Aqueous Sodium-Oxygen Electrochemistry

Iain Aldous, Laurence J. Hardwick

Angewandte Chemie International Edition, Volume: 55, Issue: 29, Pages: 8254 - 8257

Swansea University Author: Iain Aldous

  • Aldous2019.pdf

    PDF | Version of Record

    Released under the terms of a Creative Commons Attribution License (CC-BY).

    Download (1.17MB)

Check full text

DOI (Published version): 10.1002/anie.201601615

Abstract

The reduction of dioxygen in the presence of sodium cations can be tuned to give either sodium superoxide or sodium peroxide discharge products at the electrode surface. Control of the mechanistic direction of these processes may enhance the ability to tailor the energy density of sodium–oxygen batt...

Full description

Published in: Angewandte Chemie International Edition
ISSN: 1433-7851
Published: Wiley 2016
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa51335
Tags: Add Tag
No Tags, Be the first to tag this record!
Abstract: The reduction of dioxygen in the presence of sodium cations can be tuned to give either sodium superoxide or sodium peroxide discharge products at the electrode surface. Control of the mechanistic direction of these processes may enhance the ability to tailor the energy density of sodium–oxygen batteries (NaO2: 1071 Wh kg−1 and Na2O2: 1505 Wh kg−1). Through spectroelectrochemical analysis of a range of non‐aqueous solvents, we describe the dependence of these processes on the electrolyte solvent and subsequent interactions formed between Na+ and O2−. The solvents ability to form and remove [Na+‐O2−]ads based on Gutmann donor number influences the final discharge product and mechanism of the cell. Utilizing surface‐enhanced Raman spectroscopy and electrochemical techniques, we demonstrate an analysis of the response of Na‐O2 cell chemistry with sulfoxide, amide, ether, and nitrile electrolyte solvents.
College: Faculty of Science and Engineering
Issue: 29
Start Page: 8254
End Page: 8257

Similar Items