NMR Studies of Ionic Liquids and Polymer Membrane Electrolytes for Batteries and Fuel Cells.

摘要

In this thesis, NMR (Nuclear Magnetic Resonance) spectroscopic techniques are used to study ionic liquids (ILs) and polymer membranes for advanced Li-ion batteries and fuel cells. Besides structural measurements, dynamics and motional properties were also measured using pulsed field gradient spin echo and relaxation experiments. Five projects are described in this thesis. The first two projects involve 1H, 19F, 7Li and 13C NMR transport studies of two different ILs. The third project is a study of Nafion ionomer aggregations where diffusion and viscosity measurements are made. The fourth project involves the structural study of lithium triflate:PEO 3 polymer membranes via 7Li static NMR. The fifth and final project described in the thesis involves 27Al NMR studies of a chloroaluminate (AlCl3) IL and the assessment of the tetrahedral Al species content.