Helms battery (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Illustration of caged lithium ions in a new polymer membrane for lithium batteries. Scientists at Berkeley Lab's Molecular Foundry used a drug-discovery toolbox to design the selective membranes. The technology could enable more efficient flows in batteries and energy storage devices. Credit Artem Baskin/Berkeley Lab 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.