Quantifying the Effect of Separator Thickness on Rate Performance in Lithium-Ion Batteries
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2022Access:
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Horváth, D.V. and Tian, R. and Gabbett, C. and Nicolosi, V. and Coleman, J.N., Quantifying the Effect of Separator Thickness on Rate Performance in Lithium-Ion Batteries, Journal of the Electrochemical Society, 169, 3, 2022Download Item:
Abstract:
In addition to improving parameters such as energy density and stability, it is important to maximise rate performance in lithium ion batteries. While much work has focused on rate-limiting factors associated with the electrodes, much less attention has been
paid to the effect of the separator on rate-performance. Here we perform a quantitative study on the effect of separator thickness on
the rate-performance of a model system of NMC-based half cells. By fitting experimental capacity vs rate curves, we measured the
characteristic time associated with charge/discharge as a function of separator thickness, finding a roughly linear increase for
separator thicknesses below ∼65 μm. This behaviour is consistent with a simple physical model which shows the separator
thickness dependence to be dominated by electrolyte resistance effects. The predictions of the model match the data extremely well
with no adjustable parameters
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http://people.tcd.ie/colemajhttp://people.tcd.ie/nicolov
Author: Nicolosi, Valeria; Coleman, Jonathan
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Journal of the Electrochemical Society;169;
3;
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lithium ion batteriesDOI:
http://dx.doi.org/10.1149/1945-7111/ac5654Metadata
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