AquaPIM Inventor (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Berkeley Lab scientists have developed an affordable flow battery membrane for the electric grid from a new class of polymers called AquaPIM. Credit Marilyn Sargent/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.