EXAFS Studies of Polymer Electrolytes

摘要

For materials such as polymer electrolytes, in which both crystalline and amorphous regions are usually present, the EXAFS technique can provide useful information about local structure in the amorphous region which is where the processes of scientific and technological interest occur. Helpful structural benchmarks are now being provided1 by careful diffraction studies of the crystalline regions of high concentration analogues of polymer electrolytes but in the end, the experimentalist has to choose the compromise that is made. Diffraction is precise but cannot access the region of interest; EXAFS is more susceptible to the influence of the experimentalist during the fitting procedure but it is able to 'speak' to the amorphous region directly.