University of Oxford
Andrew Wiles Building
Radcliffe Observatory Quarter
My current research is on the mathematical modelling of lithium-ion batteries, collaborating with Siemens. I am focused on the development of reduced-order physics-based mathematical models of lithium-ion batteries which accurately reproduce the behaviour of more detailed full-order models at a fraction of the computational cost. A key result of my research has been the development of the asymptotic single particle model with electrolyte (SPMe), which is more accurate than all other reduced-order models of equivalent computational complexity.
I am a major contributor to the open source battery modelling software PyBaMM (Python Battery Mathematical Modelling).
I am currently providing consulting services to Qdot technology on lithium-ion battery design.
Additional work on lithium-ion batteries:
I was participant at the First Energy Systems Study Group with Industry working on the "Electric Vehicle Degradation Study" in collaboration with Williams Advanced Engineering. Our team developed a simple thermal model of a lithium-ion battery, which we applied to a large data set of temperature, current, and voltage readings to infer the current state of degradation of a battery pack.
- The Effects of Periodic Disturbances in the Glass Redraw Process (InFoMM CDT Miniproject) in collaboration with Schott AG
- Alternating Direction Implicit Methods for Fourth Order Diffusion Equations (MSci Project)
- Mathematical Modelling of the Vocal Folds (ESPRC Summer Vacation Project)
I have been a Teaching Assistant for:
- B5.3 Viscous Flow (MT 2017)
- B5.6 Nonlinear Systems (HT 2018)
Prizes, awards, and scholarships:
ESPRC Centre for Doctoral Training in Industrially Focused Mathematical Modelling D.Phil funding (EP/L015803/1
2016 Dougall Prize for distiction in Honours Mathematics
2016 IMA Graduate Prize
ESPRC Summer Vacation Scholarship, University of Glasgow, 2015
University of Glasgow Student Enterprise Award, 2013
Major / recent publications:
Marquis, S.G., Sulzer, V., Timms, R., Please, C.P. and Chapman, S.J., 2019. An Asymptotic Derivation of a Single Particle Model with Electrolyte. Journal of the Electrochemical Society, 166(15), A3693-A3706.
Sulzer, V., Marquis, S.G., Timms, R., Robinson, M. and Chapman, S.J., 2019. Python Battery Mathematical Modelling (PyBaMM). Journal of Open Research Software (under review)
Marquis, S.G., O'Kiely, D., Howell, P.D., Lange, U. and Griffiths, I.M. 2019. Response to Periodic Disturbances in the Glass Redraw Process. Journal of Engineering Mathematics (under review)
Aitio A., Marquis, S.G., Ascencio P., Howey, D., 2020. Bayesian Parameter Estimation Applied to the Li-ion Battery Single Particle Model with Electrolyte Dynamics, International Federation of Automatic Control (under review)