Second, electrolyte exchange of gel-1 to yield gel-2 results in superior cycling performance. Although the capacities for these two gels are comparable at 0.05 mA cm -2 , they become progressively disparate at higher current densities (0.10 to 1.0 mA cm -2 ). More specifically, the capacities for gel-2 surpass those of gel-1 by factors of 1.7×, 3.2×, 4.7×, and 4.5× at 0.10, 0.20, 0.50, and 1.0 mA cm -2 , respectively. As discussed in Figure , ionic conductivity differences alone are an inadequate explanation for this trend. Instead, we attribute these results to three factors: viscosity (~20-26× lower for the LHCE; vide supra), RCT (~4x lower for gel-2 than gel-1; Figure ), and the unique solvent structure of LHCEs. Lower viscosity for the LHCE in gel-2 allows for greater Li + ion mobility, which is increasingly important at faster rates. Greater RCT for gel-1 results in more polarization than gel-2 at high current densities (Figure ), which translates to lower capacities.