Mapping Electron Density (IMAGE) Texas A&M University Caption Mapping electron density in order of increasing lithiation levels using spectral imaging. Each colored region corresponds to sites where electron density is localized, which also corresponds to high concentrations of Li-ions. "The stripes mark regions that have been extensively lithiated and reduced," Banerjee notes. Credit Luis De Jesús / Texas A&M University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.