Illustration of Electric Vehicle Driving (IMAGE) National Research Council of Science & Technology Caption KIST researchers developed cathode material of carbon-silicon complex by simply mixing and heating silicon mixed with oil with green ingredients corn and sweet potato starch. If batteries made of this material are installed in electric vehicles, the driving range will more than double. Credit Korea Institute of Science and Technology (KIST) Usage Restrictions Restrictions : The sources of photos and research results from KIST must be specified. 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.