Electrification of transportation and grid-storage are crucial to combat climate change. Understanding and mitigating battery degradation is key to improving durability of electric transportation and the reliability of power grids. Complexity stems from the fact that battery degradation is path dependent. This imply that usage affects not only the degradation pace but also the type of degradation the batteries experience. Lithium-ion batteries are known to degrade slowly at first before a rapid acceleration of which starting time will depend on the mix of degradation mechanisms and thus on how the battery was used. To maximize the utility of large battery systems, it is essential to understand the impact of all the stress factors associated with an application and their combined effects.
Initially funded under DOT/EVTC, then ONR/APRISES, this research first delved into the effect of grid-vehicle interactions on the performance of Li-ion batteries facilitating the determination of the causes of cell deterioration and the accurate prediction of capacity loss during real-world use. Current work with DSTG (Australia) involves an experimental campaign of more than 700 cells tested under a HNEI defined design of experiments to predict the degradation of MW systems and maximize their durability and reliability in the field.
Illustration of the path dependence of battery degradation.
- 2021, D. Beck, P. Dechent, M. Junker, D.U. Sauer, M. Dubarry, Inhomogeneities and Cell-to-Cell Variations in Lithium-Ion Batteries, a Review, Energies, Vol. 14, Issue 11, Paper 3276. (Open Access: PDF)
- 2020, M. Elliott, L.G. Swan, M. Dubarry, G. Baure, Degradation of electric vehicle lithium-ion batteries in electricity grid services, Journal of Energy Storage, Vol. 32, Paper 101873.
- 2020, G. Baure, M. Dubarry, Durability and Reliability of EV Batteries under Electric Utility Grid Operations: Impact of Frequency Regulation Usage on Cell Degradation, Energies, Vol. 13, Issue 10, Paper 2494. (Open Access: PDF)
- 2019, G. Baure, M. Dubarry, Synthetic vs. Real Driving Cycles: A Comparison of Electric Vehicle Battery Degradation, Batteries, Vol. 5, Issue 2, Paper 42. (Open Access: PDF)
- 2018, M. Dubarry, G. Baure, A. Devie, Durability and Reliability of EV Batteries under Electric Utility Grid Operations: Path Dependence of Battery Degradation, Journal of the Electrochemical Society, Vol. 165, Issue 5, pp. A773-A783. (Open Access: PDF)
- 2018, K. Uddin, M. Dubarry, M.B. Glick, The viability of vehicle-to-grid operations from a battery technology and policy perspective, Energy Policy, Vol. 113, pp. 342-347. (Open Access: PDF)
- 2017, M. Dubarry, A. Devie, K. McKenzie, Durability and Reliability of Electric Vehicle Batteries Under Electric Utility Grid Operations: Bidirectional Charging Impact Analysis, Journal of Power Sources, Vol. 358, pp. 39-49.
- 2017, D. Ansean, M. Dubarry, A. Devie, B.Y. Liaw, V.M. Garcia, J.C. Viera, M. Gonzalez, Operando lithium plating quantification and early detection of a commercial LiFePO4 cell cycled under dynamic driving schedule, Journal of Power Sources, Vol. 356, pp. 36-46.
- 2016, A. Devie, M. Dubarry, Durability and reliability of electric vehicle batteries under electric utility grid operations. Part 1: Cell-to-cell variations and preliminary testing, Batteries, Vol. 2, Issue 3, paper 28. (Open Access: PDF)
- 2016, D. Ansean, M. Dubarry, A. Devie, B.Y. Liaw, V.M. Garcia, J.C. Viera, M. Gonzalez, Fast charging technique for high power LiFePO4 batteries: a mechanistic analysis of aging, Journal of Power Sources, Vol. 321, pp. 201-209.