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Observing Conductive Properties of Ionogel Electrolytes for Solid State Batteries


Increased demand for battery power due to technological advancement requires more efficient, safer battery systems to be developed. Ionogels, which confine liquid electrolyte interspersed in a nanoporous inorganic matrix, have generated interest due to their ionic conductivity, stability, and capability of providing a solid structure while allowing liquid behavior at the nanoscale. Herein, the results for impedance and microstructure data are reported for ionogels that were processed with varying volumetric amounts of ionic liquid electrolyte (ILE). The gels were created using a standard gelation method, and their conductivities were on the same order of magnitude as the neat ILE. While their room-temperature conductivity was half of the neat ILE at 0.282 mS/cm, the conductivity closed the gap to 70 percent of the ILE at 10.6 mS/cm at 80 �C. The activation energy of the most conductive sample, 0.25 eV, is not much higher than the neat ILE at 0.2 eV. The microstructure data obtained using BET and BJH was in agreement with the reference for a simpler ionogel, but the large pore size of the tested samples was too large to obtain an accurate average pore size. The quantity adsorbed for the current work was also less than a third of the reference, which also indicates its larger pore structure.

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