Application of step potential electrochemical spectroscopy in pouch cell prototype capacitors

Marveh Forghani; Alexander Roberts

doi:10.1016/j.electacta.2021.138845

Application of step potential electrochemical spectroscopy in pouch cell prototype capacitors

Marveh Forghani, Alexander Roberts

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

97 Downloads (Pure)

Abstract

Herein we demonstrate the application of the step potential electrochemical spectroscopy (SPECS) technique to evaluate the electrochemical behaviour of large prototype capacitor devices for the first time. SPECS is generally applied for deconvoluting different charge storage mechanisms such as capacitive and diffusional processes. This study showed the effectiveness of SPECS technique to characterise the electrochemical performance of prototype pouch cell and to obtain invaluable information, including instability of the cell such as leakage current, degradation of the electrochemical cell, and a shortage of electrolyte species at highest potentials. This study also showed that the behaviour of capacitive and diffusional processes throughout different sweep rates is the same regardless of cell footprint and capacitance.

Original language	English
Article number	138845
Number of pages	12
Journal	Electrochimica Acta
Volume	390
Early online date	29 Jun 2021
DOIs	https://doi.org/10.1016/j.electacta.2021.138845
Publication status	Published - 10 Sept 2021

Bibliographical note

© 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

Funder

Materials Research Hub for Energy Conversion, Capture, and Storage (M-RHEX) (EP/R023581/1)

Keywords

Electrochemical capacitors
High power
Pouch cell
Prototype
Step potential electrochemical spectroscopy (SPECS)

ASJC Scopus subject areas

General Chemical Engineering
Electrochemistry

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10.1016/j.electacta.2021.138845

Post-PrintAccepted author manuscript, 2.05 MBLicence: CC BY-NC-ND

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title = "Application of step potential electrochemical spectroscopy in pouch cell prototype capacitors",

abstract = "Herein we demonstrate the application of the step potential electrochemical spectroscopy (SPECS) technique to evaluate the electrochemical behaviour of large prototype capacitor devices for the first time. SPECS is generally applied for deconvoluting different charge storage mechanisms such as capacitive and diffusional processes. This study showed the effectiveness of SPECS technique to characterise the electrochemical performance of prototype pouch cell and to obtain invaluable information, including instability of the cell such as leakage current, degradation of the electrochemical cell, and a shortage of electrolyte species at highest potentials. This study also showed that the behaviour of capacitive and diffusional processes throughout different sweep rates is the same regardless of cell footprint and capacitance.",

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AU - Forghani, Marveh

AU - Roberts, Alexander

N1 - © 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

PY - 2021/9/10

Y1 - 2021/9/10

N2 - Herein we demonstrate the application of the step potential electrochemical spectroscopy (SPECS) technique to evaluate the electrochemical behaviour of large prototype capacitor devices for the first time. SPECS is generally applied for deconvoluting different charge storage mechanisms such as capacitive and diffusional processes. This study showed the effectiveness of SPECS technique to characterise the electrochemical performance of prototype pouch cell and to obtain invaluable information, including instability of the cell such as leakage current, degradation of the electrochemical cell, and a shortage of electrolyte species at highest potentials. This study also showed that the behaviour of capacitive and diffusional processes throughout different sweep rates is the same regardless of cell footprint and capacitance.

AB - Herein we demonstrate the application of the step potential electrochemical spectroscopy (SPECS) technique to evaluate the electrochemical behaviour of large prototype capacitor devices for the first time. SPECS is generally applied for deconvoluting different charge storage mechanisms such as capacitive and diffusional processes. This study showed the effectiveness of SPECS technique to characterise the electrochemical performance of prototype pouch cell and to obtain invaluable information, including instability of the cell such as leakage current, degradation of the electrochemical cell, and a shortage of electrolyte species at highest potentials. This study also showed that the behaviour of capacitive and diffusional processes throughout different sweep rates is the same regardless of cell footprint and capacitance.

KW - Electrochemical capacitors

KW - High power

KW - Pouch cell

KW - Prototype

KW - Step potential electrochemical spectroscopy (SPECS)

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U2 - 10.1016/j.electacta.2021.138845

DO - 10.1016/j.electacta.2021.138845

M3 - Article

SN - 0013-4686

VL - 390

JO - Electrochimica Acta

JF - Electrochimica Acta

M1 - 138845

ER -

Application of step potential electrochemical spectroscopy in pouch cell prototype capacitors

Abstract

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Keywords

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