puc-header

Lithium-Sulfur Battery Diagnostics Through Distribution of Relaxation Times Analysis

36 Pages Posted: 8 Feb 2022 Publication Status: Review Complete

See all articles by Roby Soni

Roby Soni

University College London

James B. Robinson

University College London - Electrochemical Innovation Lab

Paul R. Shearing

University College London - Electrochemical Innovation Lab

Dan J.L. Brett

University College London - Electrochemical Innovation Lab

Alexander Rettie

University College London

Thomas S. Miller

University College London - Electrochemical Innovation Lab

More...

Abstract

Electrochemical impedance spectroscopy (EIS) is widely used in battery analysis as it is simple to implement and non-destructive. However, the data provided is a global representation of all electrochemical processes within the cell and much useful information is ambiguous or inaccessible when using traditional analysis techniques. This is a major challenge when EIS is used to analyse systems with complex cell chemistries, like lithium-sulfur (Li-S), one of the strongest candidates to supersede conventional Li-ion batteries. Here we demonstrate the application of distribution of relaxation times (DRT) analysis for quantitative deconvolution of EIS spectra from Li-S batteries, revealing the contributions of (eight) distinct electrode processes to the total cell polarisation. The DRT profile is shown to be strongly dependent on cell state-of-charge and state-of-health, offering a route to automated and on-board analysis of Li-S cells.

Keywords: Li-S, LiS, DRT, EIS, Electrochemical Impedance Spectroscopy, On-board, Metrology, In Situ, Operando

Suggested Citation

Soni, Roby and Robinson, James B. and Shearing, Paul R. and Brett, Dan J.L. and Rettie, Alexander and Miller, Thomas S., Lithium-Sulfur Battery Diagnostics Through Distribution of Relaxation Times Analysis. Available at SSRN: https://ssrn.com/abstract=4030055 or http://dx.doi.org/10.2139/ssrn.4030055
This version of the paper has not been formally peer reviewed.

Roby Soni

University College London ( email )

Gower Street
London, WC1E 6BT
United Kingdom

James B. Robinson

University College London - Electrochemical Innovation Lab ( email )

London
United Kingdom

Paul R. Shearing

University College London - Electrochemical Innovation Lab ( email )

London
United Kingdom

Dan J.L. Brett

University College London - Electrochemical Innovation Lab ( email )

London
United Kingdom

Alexander Rettie

University College London ( email )

Gower Street
London, WC1E 6BT
United Kingdom

Thomas S. Miller (Contact Author)

University College London - Electrochemical Innovation Lab ( email )

London, WC1E 7J
United Kingdom

Click here to go to Cell.com

Paper statistics

Downloads
19
Abstract Views
434
PlumX Metrics