The diffusivities, permittivities, and transport properties are calculated as per previous work. The double-layer thickness is simulated by solution of the Wien-effect modified PNP and results from an assumed neutralization thickness of 3.5 nm at the AEL|CEL interface. Discussion of the double layer simulation at the AEL|CEL interface can be found in prior work. Details on how the diffusivities and transport properties in the BPM are calculated can be found in Section S1.5.