Increasing the percentage of EGDMA in the membrane composition may decrease the water uptake due to a more crosslinked polymeric matrix. Figure shows a linear decrease in water uptake from 90 to 40% when increasing the crosslinker percentage from 2.5 to 10 wt% in the LiMTFSI-based systems and an even stronger decrease in water uptake from 154% to 53% in the case of the LiSTFSI-based membrane. These wide ranges would allow the swelling of the membranes to be tuned to within the optimal 30-100% range using the percentage of EGDMA crosslinker.