A simple, fast and accurate in-situ method to measure the rate of transport of redox species through membranes for lithium batteries
A simple, fast and accurate in-situ method to measure the rate of transport of redox species through membranes for lithium batteries
Lithium ion conducting membranes are important to protect the lithium metal electrode and act as a barrier to crossover species such as polysulphides in Li-S systems, redox mediators in Li-O2 cells or dissolved cathode species or electrolyte oxidation products in high voltage Li-ion batteries. We present an in-situ method for measuring permeability of membranes to crossover redox species. The method employs a ‘Swagelok’ cell design equipped with a glassy carbon working electrode, in which redox species are placed initially in the counter electrode compartment only. Permeability through the membrane, which separates working and counter electrodes, is determined using a square wave voltammetry technique that allows the concentration of crossover redox species to be evaluated over time with very high precision. We test the method using a model and well-behaved electrochemical system to demonstrate its sensitivity, reproducibility and reliability relative to alternative approaches. This new method offers advantages in terms of small electrolyte volume, and simple, fast, quantitative and in-situ measurement.
148-155
Meddings, Nina
3018b390-3284-4da0-a9c6-4be738803717
Owen, John R.
067986ea-f3f3-4a83-bc87-7387cc5ac85d
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
1 October 2017
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
(2017)
A simple, fast and accurate in-situ method to measure the rate of transport of redox species through membranes for lithium batteries.
Journal of Power Sources, 364, .
(doi:10.1016/j.jpowsour.2017.08.004).
Abstract
Lithium ion conducting membranes are important to protect the lithium metal electrode and act as a barrier to crossover species such as polysulphides in Li-S systems, redox mediators in Li-O2 cells or dissolved cathode species or electrolyte oxidation products in high voltage Li-ion batteries. We present an in-situ method for measuring permeability of membranes to crossover redox species. The method employs a ‘Swagelok’ cell design equipped with a glassy carbon working electrode, in which redox species are placed initially in the counter electrode compartment only. Permeability through the membrane, which separates working and counter electrodes, is determined using a square wave voltammetry technique that allows the concentration of crossover redox species to be evaluated over time with very high precision. We test the method using a model and well-behaved electrochemical system to demonstrate its sensitivity, reproducibility and reliability relative to alternative approaches. This new method offers advantages in terms of small electrolyte volume, and simple, fast, quantitative and in-situ measurement.
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permeability article v16b-not highlighted
- Accepted Manuscript
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Accepted/In Press date: 2 August 2017
e-pub ahead of print date: 12 August 2017
Published date: 1 October 2017
Identifiers
Local EPrints ID: 413000
URI: http://eprints.soton.ac.uk/id/eprint/413000
ISSN: 0378-7753
PURE UUID: 846884ed-c768-49ab-ac6a-7f37f429d587
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Date deposited: 10 Aug 2017 16:30
Last modified: 16 Mar 2024 05:36
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Author:
Nina Meddings
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