Scalable solid-template reduction for designed reduced graphene oxide architectures

Herein, we report a solid-state reduction process (in contrast to solution-based approach) by using an environmentally friendly reductant, such as vitamin C (denoted VC), to be directly employed to solid-state graphene oxide (GO) templates to give the highly active rGO architecture with a sheet resistance of as low as 10 Ω sq^-1. In addition, predesigned rGO patterns/tracks with tunable resistivity can be directly "written" on a preprepared solid GO film via the inkjet-printing technique using VC/H ₂O as the printing-ink. This advanced reduction process allows foreign active materials to be preincorporated into the GO matrix to form quality active composite architectures.