The redox aspects of lithium-ion batteries
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A2 Katsausartikkeli tieteellisessä aikakauslehdessä
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en
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15
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Energy and Environmental Science, Volume 18, issue 4, pp. 1658-1672
Abstract
This article aims to present the redox aspects of lithium-ion batteries both from a thermodynamic and from a conductivity viewpoint. We first recall the basic definitions of the electrochemical potential of the electron, and of the Fermi level for a redox couple in solutions. The Fermi level of redox solids such as metal oxide particles is then discussed, and a Nernst equation is derived for two ideal systems, namely an ideally homogenous phase where the oxidised and reduced metal ions are homogeneously distributed and two segregated phases where the oxidised and the reduced metal ions are separated in two distinct phases such as observed, for example, in biphasic lithium iron phosphate. The two different Nernst equations are then used to explain the difference in conductivity, the former being more conductive due to redox conductivity.Description
Publisher Copyright: © 2025 The Royal Society of Chemistry.
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Peljo, P, Villevieille, C & Girault, H H 2025, 'The redox aspects of lithium-ion batteries', Energy and Environmental Science, vol. 18, no. 4, pp. 1658-1672. https://doi.org/10.1039/d4ee04560b