The University of Southampton
University of Southampton Institutional Repository

Operando evaluation of selectivity and transference number of lithium-conductive membranes

Operando evaluation of selectivity and transference number of lithium-conductive membranes
Operando evaluation of selectivity and transference number of lithium-conductive membranes
Lithium selective membranes are important to prevent undesirable effects of electrodes’ cross‐talk in Li‐S and Li‐O2 cells, such as crossover of redox species from the cathode to the anode. This work reports a novel approach to evaluate their selectivity in‐operando, under practically relevant conditions, including application of a current through the membrane. The method is illustrated with a lithiated Nafion membrane, immersed in 1 molal LiTFSI in diglyme containing 0.1 molal LiI as a model crossover species, and an accurate evaluation of the transference number of crossover species is reported (t=0.0126 ±0.0018). It is also shown that the standard ex‐situ methods of evaluation of membrane selectivity, as applied without a current passing through the membrane, provide a considerable overestimation of the capability of the membrane to block crossover species.
1-6
Meddings, Nina
3018b390-3284-4da0-a9c6-4be738803717
Owen, John R.
067986ea-f3f3-4a83-bc87-7387cc5ac85d
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Meddings, Nina
3018b390-3284-4da0-a9c6-4be738803717
Owen, John R.
067986ea-f3f3-4a83-bc87-7387cc5ac85d
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37

Meddings, Nina, Owen, John R. and Garcia-Araez, Nuria (2018) Operando evaluation of selectivity and transference number of lithium-conductive membranes. ChemElectroChem, 1-6. (doi:10.1002/celc.201801372).

Record type: Article

Abstract

Lithium selective membranes are important to prevent undesirable effects of electrodes’ cross‐talk in Li‐S and Li‐O2 cells, such as crossover of redox species from the cathode to the anode. This work reports a novel approach to evaluate their selectivity in‐operando, under practically relevant conditions, including application of a current through the membrane. The method is illustrated with a lithiated Nafion membrane, immersed in 1 molal LiTFSI in diglyme containing 0.1 molal LiI as a model crossover species, and an accurate evaluation of the transference number of crossover species is reported (t=0.0126 ±0.0018). It is also shown that the standard ex‐situ methods of evaluation of membrane selectivity, as applied without a current passing through the membrane, provide a considerable overestimation of the capability of the membrane to block crossover species.

Text
manuscript - Accepted Manuscript
Download (773kB)

More information

Accepted/In Press date: 15 November 2018
e-pub ahead of print date: 14 December 2018

Identifiers

Local EPrints ID: 427080
URI: http://eprints.soton.ac.uk/id/eprint/427080
PURE UUID: e30399eb-45ae-4675-b770-dfd08b7f19ba
ORCID for Nina Meddings: ORCID iD orcid.org/0000-0001-7242-6076
ORCID for John R. Owen: ORCID iD orcid.org/0000-0002-4938-3693
ORCID for Nuria Garcia-Araez: ORCID iD orcid.org/0000-0001-9095-2379

Catalogue record

Date deposited: 21 Dec 2018 16:30
Last modified: 09 Jan 2022 06:12

Export record

Altmetrics

Contributors

Author: Nina Meddings ORCID iD
Author: John R. Owen ORCID iD

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×