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Title: Short-Time Fourier Transform Analysis of Current Charge/Discharge Response of Lithium-Sulfur Batteries
Measurements acquired on batteries in the form of time signals such as voltage-time and capacity-time to assess their cyclability performance can be supplemented by examining their frequency-domain response. This allows one to determine the global characteristics of the signals and the battery, but not the local behavior, which is very important for determining for example battery fading. In this study we examine the short-time Fourier transform for time-frequency deconstruction of galvanostatic charge/discharge signals of lithium-sulfur batteries, taken as an example. The results displayed in terms of spectrograms show how the frequency content of such signals (e.g. charge and voltage time series) evolve with the lifetime of the batteries allowing the detection of critical changes in the response that may lead to fading and eventually default.  more » « less
Award ID(s):
2126190
PAR ID:
10539088
Author(s) / Creator(s):
; ; ;
Publisher / Repository:
Electrochemical society
Date Published:
Journal Name:
Journal of The Electrochemical Society
Volume:
170
Issue:
11
ISSN:
0013-4651
Page Range / eLocation ID:
110511
Subject(s) / Keyword(s):
Short-Time Fourier Transform Analysis Lithium-Sulfur Batteries battery health
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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