Inner workings of a fuel cell (IMAGE) University of Colorado at Boulder Caption Schematic inner workings of the electrodes in a fuel cell, and the importance of key parameters. Credit Heinz et al., 2021 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.