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On the utilisation of the pseudo-capacitive capabilities of Li-ion cells for the provision of frequency response services
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Rogall, Martin, Amietszajew, Tazdin, Bhagat, Rohit, Brucoli, Maria and Greenwood, David G. (2019) On the utilisation of the pseudo-capacitive capabilities of Li-ion cells for the provision of frequency response services. Journal of Energy Storage, 22 . pp. 311-317. doi:10.1016/j.est.2019.02.028 ISSN 2352-152X.
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WRAP-On-utilisation-pseudo-capacitive-Li-ion-cells-frequency-Greenwood-2019.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1903Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.est.2019.02.028
Abstract
This work investigates the capacitive capabilities of Li-ion pouch and cylindrical cells in respect to the provision of Frequency Response services and a potential for reduction in battery ageing effects. This is achieved using Electrochemical Impedance Spectroscopy (EIS) and a novel method of identifying and defining the threshold frequency between pseudo-capacitive and diffusion processes of the cell. It is found that this threshold frequency is independent of current intensity up to 1 C, showing that even at high power, pseudo-capacitance has significant impact. However, a severe dependency upon relative cell surface area and State of Charge (SoC) is identified. Symmetrical charge-discharge pulses of up to 10 s utilise primarily cell capacitance. Literature indicates, that this level of utilisation reduces the electrochemical ageing impact significantly. This article displays a method to identify and isolate these processes for any given cell and to allow enhancement of conventional ageing modelling.
Item Type: | Journal Article | |||||||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||
Library of Congress Subject Headings (LCSH): | Lithium ion batteries | |||||||||
Journal or Publication Title: | Journal of Energy Storage | |||||||||
Publisher: | Elsevier | |||||||||
ISSN: | 2352-152X | |||||||||
Official Date: | April 2019 | |||||||||
Dates: |
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Volume: | 22 | |||||||||
Page Range: | pp. 311-317 | |||||||||
DOI: | 10.1016/j.est.2019.02.028 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||
Date of first compliant deposit: | 11 March 2019 | |||||||||
Date of first compliant Open Access: | 11 March 2019 | |||||||||
RIOXX Funder/Project Grant: |
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