Electrodes (IMAGE) Aalto University Caption Electrodes removed from the batteries. Electrodes consist of a film made from aluminum or copper, for example, which is covered with a thin layer of active material. Photo: Aalto University Credit Aalto University 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.