Nb2CTx MXene electrodes (IMAGE) City University of Hong Kong Caption Professor Zhi Chunyi from City University of Hong Kong and his team developed battery-like electrochemical Nb2CTx MXene electrodes, the black material inside the bottle. The silver “buttons” next to the bottle are batteries and at the back is the battery testing system. Credit City University of Hong Kong Usage Restrictions Image must be used with appropriate caption and credit. License Original 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.