Leif Asp with a Bobbin of Carbon Fiber Yarn (image) Chalmers University of Technology Share Print E-Mail Caption Leif Asp with a bobbin of carbon fiber yarn. The electrodes in a structural lithium ion battery consist of carbon fiber yarn arranged in a grid in a polymer (see illustration). Every length of yarn consists of 24,000 individual carbon fibers. Credit Johan Bodell, Chalmers University of Technology Usage Restrictions None Share Print E-Mail 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.