Structure/transport relationships in silver-based oxide glasses: 1-D and 2-D NMR information

AgI-doped silver oxide glasses are of interest both for their possible applications in electrochemical devices, and as a model system to study the transport/structure relationships in ionic glasses. Here we summarize the information given by 1-D and 2-D solid-state NMR measurements on both the cations dynamics and short (and medium) range structure of several glassy systems. Emphasis is given to understand how AgI enters into the glass matrix. A new and careful analysis of our previously reported 109Ag 1-D data shows that the glass matrix plays a relevant role in determining the efficiency of carriers formation, as well as their mobility. Finally, as an example of a modern 2-D NMR application to these materials, we report the first 11B and 17O Multiple Quantum MAS study on a glass of the system AgI:Ag2O:2B2O2, which confirms the nearly complete absence of non-bridging oxygens (NBOs) in the silver diborate composition.