Lithium ion battery anodes using Si Fe based nanocomposite structures
Abstract Due to its extremely high capacity, silicon (Si) is a potentially very useful anode material for lithium (Li) ion batteries. The key aim in the application of Si based nanostructures to Li ion battery anodes is to improve their cyclic properties. To minimize volume expansion during the insertion and extraction of Li ions, we synthesized unique Si iron (Fe) based nanomaterials connected by Ge nanostructures using chemical vapor deposition. The Si Fe based new nanostructures showed a maximum capacity of about 689 mAh/g and stable cyclic properties. These properties are due to their unique nano composite structures composed by Si and metals.