Publications

Managing silicon burn-out via onboard material diagnostics for durable high-energy density batteries

Z. Wan, A. Weng, S. Pannala, H. Movahedi, T. R. Garrick, G. J. Offer, J. B. Siegel, A. G. Stefanopoulou

Joule, 2026

Degradation and expansion of lithium-ion batteries with silicon/graphite anodes: Impact of pretension, temperature, C-rate and state-of-charge window

Z. Wan, S. Pannala, C. Solbrig, T. R. Garrick, A. G. Stefanopoulou, J. B. Siegel

How mechanical pretension, temperature, and how hard you cycle a cell change the way silicon-graphite anodes age and expand.

eTransportation 24, 2025DOI28 citations

Extra throughput versus days lost in V2G services: Influence of dominant degradation mechanism

H. Movahedi, S. Pannala, J. B. Siegel, S. J. Harris, D. Howey, A. G. Stefanopoulou

J. Energy Storage 104, 202418 citations

Consistently tuned battery lifetime predictive model of capacity loss, resistance increase, and irreversible thickness growth

S. Pannala, H. Movahedi, T. R. Garrick, A. G. Stefanopoulou, J. B. Siegel

One model, tuned once, that predicts capacity loss, resistance rise, and irreversible expansion together, and holds up on cycling conditions it never saw during training.

JES 171(1) 010532, 2024DOI69 citations

Accelerated battery lifetime simulations using adaptive inter-cycle extrapolation algorithm

V. Sulzer, P. Mohtat, S. Pannala, J. B. Siegel, A. G. Stefanopoulou

Simulating years of battery aging in minutes by skipping ahead between cycles without losing what happens inside them.

JES 168(12), 2021DOI71 citations

The case for DeepSOH: Addressing path dependency for remaining useful life in Li-ion batteries

H. Movahedi, A. Weng, S. Pannala, J. B. Siegel, A. G. Stefanopoulou

IFAC 58(28), 20241 citations

Differential voltage analysis and patterns in parallel-connected pairs of imbalanced cells

C. Wong, A. Weng, S. Pannala, J. Choi, J. B. Siegel, A. G. Stefanopoulou

ACC 2024, 202412 citations

Physics-informed optimal experiment design of calendar aging tests and sensitivity analysis for SEI parameter estimation in lithium-ion batteries

H. Movahedi, S. Pannala, J. B. Siegel, A. G. Stefanopoulou

IFAC 56(3), 20237 citations

Methodology for accelerated inter-cycle simulations of Li-ion battery degradation with intra-cycle resolved degradation mechanisms

S. Pannala, V. Sulzer, J. B. Siegel, A. G. Stefanopoulou

ACC 2022, 2022DOI14 citations

Low-cost inductive sensor and fixture kit for measuring battery cell thickness under constant pressure

S. Pannala, A. Weng, I. Fischer, J. B. Siegel, A. G. Stefanopoulou

A $50 sensor and fixture that measures cell thickness to half a micron, where the lab standard costs $2,000 a channel.

IFAC 55(37), 2022DOI23 citationsBest Paper Runner-Up

Parallel-connected battery current imbalance dynamics

A. Weng, S. Pannala, J. B. Siegel, A. G. Stefanopoulou

IFAC 55(37), 2022DOI10 citations

An algorithmic safety VEST for Li-ion batteries during fast charging

P. Mohtat, S. Pannala, V. Sulzer, J. B. Siegel, A. G. Stefanopoulou

IFAC 54(20), 202122 citations

Electrochemical battery state estimation under parameter uncertainty caused by aging using expansion measurements

S. Pannala, P. Valecha, P. Mohtat, J. B. Siegel, A. G. Stefanopoulou

ACC 2021, 2021DOI8 citations

Battery internal short detection methodology using cell swelling measurements

T. Cai, S. Pannala, A. G. Stefanopoulou, J. B. Siegel

Catching an internal short circuit from how the cell expands, before the electrical signature makes it obvious.

ACC 2020, 2020DOI50 citations

The case for DeepSOH: Addressing path dependency for remaining useful life

H. Movahedi, A. Weng, S. Pannala, J. B. Siegel, A. G. Stefanopoulou

arXiv, 20241 citations

Extra throughput versus days lost in load-shifting V2G services: Influence of dominant degradation mechanism

H. Movahedi, S. Pannala, J. B. Siegel, S. J. Harris, D. Howey, A. G. Stefanopoulou

arXiv, 20246 citations

Modeling of capacity, resistance, and expansion of lithium-ion batteries as they degrade: Linking expansion and degradation

S. Pannala

Ph.D. thesis, 20251 citations