Positive Electrode (IMAGE) DOE/SLAC National Accelerator Laboratory Caption A Stanford/SLAC researcher holds the positive electrode from a lithium ion coin cell battery used in experiments. Scientists charged these batteries with different levels of current for various periods of time, took them apart and used a brilliant X-ray beam to see how the charge was distributed among billions of nanoparticles in the positive electrode. Credit SLAC National Accelerator Laboratory 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.