%0 Journal Article
%A F.L.E Usseglio-Viretta
%A W Mai
%A A.M Colclasure
%A M Doeff
%A Eongyu Yi
%A K Smith
%B Electrochimica Acta
%D 2020
%G eng
%P 136034
%R 10.1016/j.electacta.2020.136034
%T Enabling fast charging of lithium-ion batteries through secondary- /dual- pore network: Part I - Analytical diffusion model
%V 342
%8 03/2020
%! Electrochimica Acta
%X <p><span>Battery performance is strongly correlated with electrode microstructural properties. Enabling fast charging of lithium-ion batteries requires improved through-plane ionic diffusion that can be achieved through, among other strategies, structured electrodes with a secondary- or dual-pore network (SPN). In this work, an analytical model investigates the impact of such an SPN on ionic diffusion with a composite electrode, considering various pore-channel geometries and comparing to standard electrodes with identical gravimetric- and volumetric-specific theoretical capacities. Relevant SPN design parameters and tortuosity coefficients are identified according to three optimization objectives that aim to balance the improved overall through-plane diffusion, thanks to the coarse aligned channels, and degraded in-plane diffusion because of the porous matrix densification required to maintain gravimetric- and volumetric-specific theoretical capacities. The model indicates that a relatively low amount of SPN is required and that electrodes with high through-plane tortuosity and low in-plane tortuosity benefit most from such architecture.</span></p>