Dynamics of Proton Transport in Polyethylene Oxide (PEO) with Ammonium Perchlorate (NH₄ClO₄)

Abstract

NH4ClO4 has a very high ionic conductivity ∼ 10−5 Scm −1 in which probable charge carrying mobile species is H+ ion apart from the anion ClO4−. The H+ can be derived either from the -CH2-CH2-of the polymer PEO chain or from the NH4+ of the complexing salt. In order to identify the mobile H+ species and to investigate its dynamics, a wide-line nuclear magnetic resonance (NMR) study has been carried as a function of temperature. The two types of H+ species, as stated above, have been found to show different temperature dependence of the respective NMR-linewidths. It has been established that only one of these H+ species (i.e., belonging to NH4+ cation) contributes predominantly to the room temperature conductivity.