Like a Battery in Reverse (IMAGE) DOE/SLAC National Accelerator Laboratory Caption Rather than generating electricity, an electrolyzer uses electrical current to split water into hydrogen and oxygen. Credit Greg Stewart, 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.