Ultracapacitor's Composite Film (image) American Institute of Physics Caption A scanning electron microscope image shows the ultracapacitor's composite film containing graphene flakes and single-walled carbon nanotubes. Credit Journal of Applied Physics Usage Restrictions This image may be used only with appropriate caption and credit. 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.