Nanochains in a Coin Cell Battery (IMAGE) Purdue University Caption Artistic depiction of a coin cell battery with a copper electrode (left) containing a black nanochain structure, which researchers have discovered could increase the capacity of a battery and cut charging time. Credit Purdue University illustration/Henry Hamann 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.