Figure (a): Nanoporous germanium (Ge)/carbon (C) stacked negative electrodes fabricated by proprietary high-pressure plasma sputtering. (IMAGE) Meijo University Caption Figure (b): Charge/discharge cycle characteristics of Li-ion battery capacity. The new C/Ge/C structure demonstrated a high capacity of 910 mAh/g, about three times that of conventional carbon, for more than 90 cycles without degradation. Credit Giichiro Uchida / Meijo University Usage Restrictions This image may be used with appropriate 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.