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SUMMARY:Modelling electrode heterogeneity in lithium-ion batteries - Dr To
 by Kirk\, Imperial College London
DTSTART:20230126T113000Z
DTEND:20230126T123000Z
UID:TALK194314@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:Lithium-ion batteries have become ubiquitous in consumer elect
 ronics\, and more recently electric vehicles\, due to their high energy de
 nsity\, long lifespan\, and a low self-discharge rate. Their increasing de
 mand necessitates design improvements in performance and reliability\, whi
 ch in turn requires accurate models of how they work. In mathematical mode
 ls\, the highly heterogeneous porous electrodes are usually approximated a
 s comprising spherical particles of one size\, leading to the so-called 
 “single-particle model”. In this talk\, we first extend this model to 
 account for a distribution of particle sizes. We discuss its effects and t
 he methods of reduction to an effective single particle\, e.g. via averagi
 ng or asymptotic methods. Then\, this model is further extended to include
  the electrolyte dynamics via a multiscale “pseudo-3D” approach\, whic
 h we show can capture some basic behaviours of a battery seen in experimen
 ts (such as its rest period immediately after a (dis)charge) that were pre
 viously unexplained. The numerical models have been incorporated into the 
 open source battery modelling software package PyBaMM\, to enhance their u
 sability and reproducibility.
LOCATION:Open Plan Area\, Institute for Energy and Environmental Flows\, M
 adingley Rise CB3 0EZ
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