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Estimating lithium-ion battery behavior from half-cell data

Estimating lithium-ion battery behavior from half-cell data
Estimating lithium-ion battery behavior from half-cell data
The electrochemical behavior of lithium-ion battery electrode materials is often studied in the so-called ‘lithium half-cell configuration’, in which the electrode is tested in an electrochemical cell with a lithium metal electrode acting as both counter and reference electrode. However, the performance of lithium-ion batteries is affected by the electrochemical behavior of the two electrodes composing the battery. Therefore, in order to understand the behavior of battery materials under conditions representative of commercial applications, it is necessary to perform electrochemical measurements in the so-called ‘full-cell configuration’, in which a cathode (e.g. lithium iron phosphate or LFP) and an anode (e.g. graphite) are combined in an appropriate capacity ratio. In this work, we provide further understanding of how the behavior of the electrodes in half-cell configuration affects the electrochemical response of the full cell. For that, we characterize two commercially relevant battery materials, LFP and graphite, in lithium half-cells, and also combined in a LFP vs graphite full-cell. Additionally, we employ the electrochemical response of the LFP and graphite electrodes in lithium-half cells to predict the electrochemical response of the LFP vs graphite full-cell, and the results of our calculations are in very good agreement with the experimental measurements.
Battery, Half-cell, Lithium ion, full-cell
2352-4847
97-103
Rowden, Ben
6d8fa028-8ef6-4589-bf1b-dde4d4fb18f2
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Rowden, Ben
6d8fa028-8ef6-4589-bf1b-dde4d4fb18f2
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37

Rowden, Ben and Garcia-Araez, Nuria (2021) Estimating lithium-ion battery behavior from half-cell data. Energy Reports, 7 (2), 97-103. (doi:10.1016/j.egyr.2021.02.048).

Record type: Article

Abstract

The electrochemical behavior of lithium-ion battery electrode materials is often studied in the so-called ‘lithium half-cell configuration’, in which the electrode is tested in an electrochemical cell with a lithium metal electrode acting as both counter and reference electrode. However, the performance of lithium-ion batteries is affected by the electrochemical behavior of the two electrodes composing the battery. Therefore, in order to understand the behavior of battery materials under conditions representative of commercial applications, it is necessary to perform electrochemical measurements in the so-called ‘full-cell configuration’, in which a cathode (e.g. lithium iron phosphate or LFP) and an anode (e.g. graphite) are combined in an appropriate capacity ratio. In this work, we provide further understanding of how the behavior of the electrodes in half-cell configuration affects the electrochemical response of the full cell. For that, we characterize two commercially relevant battery materials, LFP and graphite, in lithium half-cells, and also combined in a LFP vs graphite full-cell. Additionally, we employ the electrochemical response of the LFP and graphite electrodes in lithium-half cells to predict the electrochemical response of the LFP vs graphite full-cell, and the results of our calculations are in very good agreement with the experimental measurements.

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Accepted/In Press date: 17 February 2021
Published date: 28 May 2021
Additional Information: Funding Information: The authors gratefully acknowledge financial support from the UK Engineering and Physical Sciences Research Council (EPSRC) through the Centre for Doctoral Training in Energy Storage and its Applications (Grant No. EP/L016818/1 ). We also gratefully acknowledge the reviewer of this article for the excellent suggestions to improve the quality and clarity of the article. Publisher Copyright: © 2021 The Authors Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
Keywords: Battery, Half-cell, Lithium ion, full-cell

Identifiers

Local EPrints ID: 449967
URI: http://eprints.soton.ac.uk/id/eprint/449967
ISSN: 2352-4847
PURE UUID: c55c9b87-e28d-483c-a7e1-484783ef3c95
ORCID for Nuria Garcia-Araez: ORCID iD orcid.org/0000-0001-9095-2379

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Date deposited: 30 Jun 2021 16:31
Last modified: 28 Apr 2022 02:08

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Author: Ben Rowden

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