ION-BEAM ANALYSIS OF LITHIUM-ION CONDUCTING AMORPHOUS ELECTROLYTE FILMS

The Li/Si and Li/P ratios in 1-2-mu-m thick xLi2O:ySiO2:zP2O5 amorphous electrolyte films were determined by proton-induced gamma-ray emission analysis (PIGE) using a 4 MeV proton beam. These measurements were performed with the new IBA facility which has been installed at the University of Kentucky 7.5 MV, Model CN Van de Graaff accelerator. The nondestructive PIGE determination of the Li content of the films played an integral role in understanding this three component system as the PIGE measurements proved to be more reliable than either SIMS or ICP-AE analyses. The conductivity of the films was strongly dependent on the Li2O content; reduction of the Li2O content of the films resulted in large decreases in the mobility of the lithium ions.