Operando decoding of chemical and thermal events in commercial Na(Li)-ion cells via optical sensors

Jiaqiang Huang, Laura Albero Blanquer, Julien Bonefacino, E. R. Logan, Daniel Alves Dalla Corte, Charles Delacourt, Betar M. Gallant, Steven T. Boles, J. R. Dahn, Hwa-Yaw Tam and Jean-Marie Tarascon ()
Additional contact information
Jiaqiang Huang: Collège de France, Chimie du Solide et de l’Energie—UMR 8260 CNRS
Laura Albero Blanquer: Collège de France, Chimie du Solide et de l’Energie—UMR 8260 CNRS
Julien Bonefacino: The Hong Kong Polytechnic University
E. R. Logan: Dalhousie University
Daniel Alves Dalla Corte: Collège de France, Chimie du Solide et de l’Energie—UMR 8260 CNRS
Charles Delacourt: Laboratoire de Réactivité et Chimie des Solides, LRCS, CNRS UMR 7314, UPJV
Betar M. Gallant: Massachusetts Institute of Technology
Steven T. Boles: The Hong Kong Polytechnic University
J. R. Dahn: Dalhousie University
Hwa-Yaw Tam: The Hong Kong Polytechnic University
Jean-Marie Tarascon: Collège de France, Chimie du Solide et de l’Energie—UMR 8260 CNRS

Nature Energy, 2020, vol. 5, issue 9, 674-683

Abstract: Abstract Monitoring the dynamic chemical and thermal state of a cell during operation is crucial to making meaningful advancements in battery technology as safety and reliability cannot be compromised. Here we demonstrate the feasibility of incorporating optical fibre Bragg grating sensors into commercial 18650 cells. By adjusting fibre morphologies, wavelength changes associated with both temperature and pressure are decoupled with high accuracy, which allows tracking of chemical events such as solid electrolyte interphase formation and structural evolution. We also demonstrate how multiple sensors are used to determine the heat generated by the cell without resorting to microcalorimetry. Unlike with conventional isothermal calorimetry, the cell’s heat capacity contribution is readily assessed, allowing for full parametrization of the thermal model. Collectively, these findings offer a scalable solution for screening electrolyte additives, rapidly identifying the best formation processes of commercial cells and designing battery thermal management systems with enhanced safety.

Date: 2020
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DOI: 10.1038/s41560-020-0665-y

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