Fabrication of a solvent-exchanged gel from a silica-based ionogel was conducted through a multistep process. First, ionogels, modifying a previously reported process, were spun onto LFP cast electrodes to an approximate thickness of 10 microns (Figure ) or drop cast into bulk molds for analysis. The ionogel was allowed to age overnight before drying in a vacuum oven to remove any residual alcohol or water produced during the sol-gel process. Exchange occurred in an Ar glovebox through a multi-step process, where the electrodes were soaked for two or more hours in an excess of the parent electrolyte. This was repeated three times with new electrolyte to ensure complete exchange (Figure ). PC and DOL/DME based electrolytes were chosen for exchange to represent carbonate and ether-based electrolytes and due to their solubility with the ionic liquid. While not required here, in systems where the electrolyte has a low solubility with the ionic liquid, an intermediate solvent could be used to facilitate the exchange. To determine the extent of solvent exchange, the physicochemical properties of the bulk gels after exchange were compared to the base ionogel and neat liquid electrolytes. Raman analysis of the exchange gels indicate all peaks associated with the TFSI -anion disappear, signifying that the ionic liquid has been successfully replaced inside the silica structure (Figure ). A new peak associated with the DOL ring opening is identified at approximately 850 cm -1 for the ether system. All other peaks in the DOL/DME and PC spectra can be assigned to the expected signature for the corresponding exchanged solvent and lithium salt. It is unclear whether the ring opening originates from the use of LiFSI or if the silica matrix catalyzes the reaction. To support that exchange was complete, as indicated by the Raman data, TGA of the base electrolyte and exchanged gels was performed (Figure ). The TGA results show no weight loss attributed to the PYR14TFSI ionic liquid (~400 o C); only weight loss associated with the PC (~180 o C) and DOL/DME (~100 o C) components is identified. The remaining weight is primarily associated to the silica matrix, with the silica content falling within the expected range for the fabrication process. A shift in the corresponding decomposition temperatures to higher values is identified for both the DOL/DME and PC gels as confinement by the silica matrix inhibits breakdown, similar to previous studies of confined liquids. To assess whether the exchange impacts the matrix structure, the bulk gels were super-critically dried to suppress the silica skeleton collapse, followed by porosity analysis using N2 gas adsorption (Figure ). Brunauer-Emmett-Teller (BET) analysis of the gas isotherms demonstrates that the exchanged gels maintain a high surface area of at least 700 m 2 g -1 . As gelation is complete before exchange, the exchanged matrix maintains the pore distribution of the original gel, with the pore size determined by the initial ILE stacking (Figure ). Variations in the surface area between the ionogel and exchanged gels likely stems from incomplete solvent removal during drying which led to pore collapse. Measurement of the ionic conductivity for the various systems indicates comparable conductivities and activation energies between the free electrolyte and gel-based systems (Figure ). The slightly lower conductivities for the gels follows previous studies that indicated the silica matrix increases the ion path tortuosity and decreases the total liquid volume. The relative lower conductivity of the DOL/DME gel can be explained by the polymerization of DOL. All conductivities of the free electrolytes agree well with reported values in literature.