NMR study of ion-conducting organic-inorganic nanocomposites poly(ethyleneglycol) - Silica - LiClO4

Hybrid organic-inorganic ionic conductors, also called ormolytes, were obta ined by dissolution of LiClO4 into silica/poly(ethylene glycol) matrices. S olid-state nuclear magnetic resonance (NMR) was used to probe the inorganic phase structure (Si-29) and the effects of the temperature and composition on the dynamic behavior of the ionic species (Li-7) and the polymer chains (H-1 and C-13). The NMR results between -100 and +90 degrees C show a stro ng correlation with ionic conductivity and differential scanning calorimetr y experiments. The results also demonstrate that the cation mobility is ass isted by segmental motion of the polymer, which is in agreement with the re sults previously reported for pure poly(ethylene oxide), PEG, electrolytes.