Battery Cartoon (IMAGE) Penn State Caption A three-dimensional cross-linked polymer sponge attaches to the metal plating of a lithium ion battery anode, allowing ion transfer and limiting deterioration. Credit Donghai Wang, Penn State Usage Restrictions Non commercial use only 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.