Twin-functional graphene oxide: compacting with Fe2O3 into a high volumetric capacity anode for lithium ion battery

Graphene oxide (GO) shows very unique twin functions, both as hard and soft templates, in the production of highly solid Fe2O3 microspheres. Together with three-dimensional interconnected conductive graphene network formed spontaneously, the highly solid Fe2O3 microspheres exhibit an excellent rate performance and more importantly, a super high volumetric capacity of about 1200 mA h cm−3. This work shows a promising approach for the densification of nanostructures and promotes the practical applications of low density nanomaterials in real energy storage devices.292