Review—“Knees” in Lithium-Ion Battery Aging Trajectories

Lithium-ion batteries can last many years but sometimes exhibit rapid, nonlinear degradation that severely limits battery lifetime. In this work, we review prior work on “knees” in lithium-ion battery aging trajectories. We first review definitions for knees and three classes of “internal state traj...

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Veröffentlicht in:Journal of the Electrochemical Society 2022-06, Vol.169 (6), p.60517
Hauptverfasser: Attia, Peter M., Bills, Alexander, Brosa Planella, Ferran, Dechent, Philipp, dos Reis, Gonçalo, Dubarry, Matthieu, Gasper, Paul, Gilchrist, Richard, Greenbank, Samuel, Howey, David, Liu, Ouyang, Khoo, Edwin, Preger, Yuliya, Soni, Abhishek, Sripad, Shashank, Stefanopoulou, Anna G., Sulzer, Valentin
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Sprache:eng
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Zusammenfassung:Lithium-ion batteries can last many years but sometimes exhibit rapid, nonlinear degradation that severely limits battery lifetime. In this work, we review prior work on “knees” in lithium-ion battery aging trajectories. We first review definitions for knees and three classes of “internal state trajectories” (termed snowball, hidden, and threshold trajectories) that can cause a knee. We then discuss six knee “pathways”, including lithium plating, electrode saturation, resistance growth, electrolyte and additive depletion, percolation-limited connectivity, and mechanical deformation—some of which have internal state trajectories with signals that are electrochemically undetectable. We also identify key design and usage sensitivities for knees. Finally, we discuss challenges and opportunities for knee modeling and prediction. Our findings illustrate the complexity and subtlety of lithium-ion battery degradation and can aid both academic and industrial efforts to improve battery lifetime.
ISSN:0013-4651
1945-7111
DOI:10.1149/1945-7111/ac6d13