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A highly sensitive electrochemical sensor of polysulfides in polymer lithium-sulfur batteries

A highly sensitive electrochemical sensor of polysulfides in polymer lithium-sulfur batteries
A highly sensitive electrochemical sensor of polysulfides in polymer lithium-sulfur batteries
A novel and highly sensitive electrochemical sensor is used here to detect polysulfides as intermediates formed during cycling of a solid polymer lithium-sulfur cell. The formation of polysulfides is found to produce dramatic changes in the shape and magnitude of the voltammetric current of the sensor. Impedance analysis is also applied to quantify electrochemical properties such as charge-transfer and Warburg resistances of the polysulfide species. This new experimental set-up enables a rigorous analysis of the electrochemical properties of polysulfides and sulfur species, and it is used here to elucidate the fundamental cause of the effect of the choice of lithium salt (LiTFSI or LiFSI) on solid polymer Li-S cell performance.
0013-4651
Meddings, Nina
3018b390-3284-4da0-a9c6-4be738803717
Judez, Xabier
61382e4c-0405-4703-93c3-db351760ba43
Li, Chunmei
b58e5015-5de1-43cd-af4b-4ad2bd30e489
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Meddings, Nina
3018b390-3284-4da0-a9c6-4be738803717
Judez, Xabier
61382e4c-0405-4703-93c3-db351760ba43
Li, Chunmei
b58e5015-5de1-43cd-af4b-4ad2bd30e489
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37

Meddings, Nina, Judez, Xabier, Li, Chunmei and Garcia-Araez, Nuria (2020) A highly sensitive electrochemical sensor of polysulfides in polymer lithium-sulfur batteries. Journal of the Electrochemical Society, 167 (8), [080520]. (doi:10.1149/1945-7111/ab8ce9).

Record type: Article

Abstract

A novel and highly sensitive electrochemical sensor is used here to detect polysulfides as intermediates formed during cycling of a solid polymer lithium-sulfur cell. The formation of polysulfides is found to produce dramatic changes in the shape and magnitude of the voltammetric current of the sensor. Impedance analysis is also applied to quantify electrochemical properties such as charge-transfer and Warburg resistances of the polysulfide species. This new experimental set-up enables a rigorous analysis of the electrochemical properties of polysulfides and sulfur species, and it is used here to elucidate the fundamental cause of the effect of the choice of lithium salt (LiTFSI or LiFSI) on solid polymer Li-S cell performance.

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article sensor PEO Li-S JES-R2e - Accepted Manuscript
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More information

Accepted/In Press date: 21 April 2020
e-pub ahead of print date: 24 April 2020
Published date: 5 May 2020

Identifiers

Local EPrints ID: 440906
URI: http://eprints.soton.ac.uk/id/eprint/440906
ISSN: 0013-4651
PURE UUID: 36c51c53-4dae-4624-b50a-828a5198d405
ORCID for Nina Meddings: ORCID iD orcid.org/0000-0001-7242-6076
ORCID for Nuria Garcia-Araez: ORCID iD orcid.org/0000-0001-9095-2379

Catalogue record

Date deposited: 22 May 2020 16:37
Last modified: 26 Nov 2021 03:00

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Contributors

Author: Nina Meddings ORCID iD
Author: Xabier Judez
Author: Chunmei Li

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