GeOx/Reduced Graphene Oxide Composite as an Anode for LiIon Batteries: Enhanced Capacity via Reversible Utilization of Li2O along with Improved Rate Performance

Anode materials with high specifi c capacity and rate capability are one of the key components of such batteries. Traditional carbon-based anode materials exhibit acceptable overall performance with respect to the energy/power requirements of existing portable electronic devices, but have a relatively low specifi c capacity, poor Li + insertion/extraction kinetics, and documented safety issues. [ 3 ] These downsides make carbon-based anodes inadequate for many upcoming applications and have impelled researchers to fi nd alternative high-capacity anode materials, for example, Si, Ge, and metal oxides. [ 4–7 ]