Figure 7

Ragone chart of SnO₂@C@half-rGO//gpC and SnO₂@C/rGO//gpC. The performance is compared with reported similar LIHC systems including Fe₃O₄/graphene//3D-graphene³², VN-RGO//AC³³, porous NbN//AC³⁴, MnO@graphene//HNC³⁵, SnO₂/Cu/CNT//AC³⁶, Li₄Ti₅O₁₂//activated bottom-up graphene³⁷, and Li₃V₂(PO₄)₃-C//AC³⁸.