Membrane suitability towards electrodialysis applications is usually expressed by three essential parameters; (1) mechanical stability, (2) water uptake, and (3) ionic exchange capacity. Based on literature and benchmarking of commercially available membranes performed in this work, water uptake values should be restricted to a ≈30 -100% range. This allows sufficient water uptake for Li-ion transport but not too much to compromise the membrane's mechanical stability and decrease membrane selectivity. Ion exchange capacity (IEC) values in the 0.8 -3 meq g -1 range are required, with low values not allowing sufficient ionic transport and large values resulting in a large amount of water uptake and membrane swelling as well as lower permselectivity. The membranes also need to present sufficient flexibility during handling and retain mechanical integrity upon swelling.