Advanced Materials

A Germanium–Carbon Nanocomposite Material for Lithium Batteries


  • The authors thank G. Götz, U. Klock, A. Schulz, and W. König for their technical support. The authors are indebted to the Max Planck Society and acknowledge support in the framework of the ENERCHEM project. Supporting Information is available online from Wiley InterScience or from the author.


A facile approach to prepare carbon-germanium composite nanoscale spheres with Ge nanoparticles encapsulated by a carbon matrix (see figure) is developed. The method involves solid-state pyrolysis of an intermediate thermally polymerized from tetraallylgermane. The composite exhibits a highly stable and reversible capacity of about 900 mA h g−1 and improved rate performance as an anode material in a Li secondary battery.

original image