An accelerated method for determining the solid-phase diffusion coefficient and reaction-rate constant for Li-ion batteries

Journal of Power Sources, vol. 696, pp. 241495

Abstract

This study presents an approach to accelerate galvanostatic intermittent titration technique (GITT) measurements for determining the solid-phase diffusion coefficient ( D s ) and reaction-rate constant ( k 0 ) used in physics-based battery models such as the Doyle-Fuller-Newman (DFN) model. The approach addresses the challenge of lengthy measurement times associated with conventional GITT protocols. By using the DFN model to predict cell states during battery operation, the proposed method reduces the relaxation duration to 10 min while retaining close agreement with the D s and k 0 estimates obtained using a 6 h-relaxation reference protocol and comparable voltage-prediction performance in separate constant-current and dynamic load profile validations. Additionally, terminating the relaxation when the voltage relaxation rate threshold falls below 10 mV h −1 reduces the total GITT measurement time by 95 %. The study also demonstrates that the extended single particle model (ESPM) provides an efficient alternative to the DFN model for the determination of D s and k 0 , reducing computational requirements while providing comparable parameter estimates. These findings accelerate physics-based model parameterization, facilitating faster cell development and improving the accessibility of electrochemical parameters.

Authors 7

1. Haider Adel Ali Ali Aachen Institute of Physical Chemistry

   Forschungszentrum Jülich · RWTH Aachen University

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy Technologies (IET-1), Wilhelm-Johnen-Straße, Jülich, 52428, Germany

   RWTH Aachen University, Institute of Physical Chemistry, Landoltweg 2, Aachen, 52074, Germany

2. Luc H.J. Raijmakers corresponding

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy Technologies (IET-1), Wilhelm-Johnen-Straße, Jülich, 52428, Germany

3. Anna Windmüller

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy Technologies (IET-1), Wilhelm-Johnen-Straße, Jülich, 52428, Germany

4. Hermann Tempel

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy Technologies (IET-1), Wilhelm-Johnen-Straße, Jülich, 52428, Germany

5. Bor Yann Liaw

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy Technologies (IET-1), Wilhelm-Johnen-Straße, Jülich, 52428, Germany

   High Power Research Laboratory, LLC, Sparks, NV, 89436, USA

6. Peter H. L. Notten

   University of Technology Sydney · Forschungszentrum Jülich · Eindhoven University of Technology

   Affiliation as printed

   Centre for Clean Energy Technology, University of Technology Sydney, Broadway, Sydney, NSW, 2007, Australia

   Eindhoven University of Technology, P.O. Box 513, Eindhoven, MB, 5600, the Netherlands

   Forschungszentrum Jülich GmbH, Institute of Energy Technologies (IET-1), Wilhelm-Johnen-Straße, Jülich, 52428, Germany

7. Rüdiger‐A. Eichel Aachen Institute of Physical Chemistry

   Forschungszentrum Jülich · RWTH Aachen University

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy Technologies (IET-1), Wilhelm-Johnen-Straße, Jülich, 52428, Germany

   RWTH Aachen University, Institute of Physical Chemistry, Landoltweg 2, Aachen, 52074, Germany