▎ 摘　　要

Pseudo-capacitive materials operating with electron-hopping as the charge transfer mechanism are elaborated by the extensive assembly of fixed redox molecules onto the surface of graphene-supported mesoporous silica film. Various physico-chemical techniques are used to characterize the resulting composites. The obtained GO@Fc-MS electrode (ferrocene functionalized silica film coated onto electro-exfoliated graphene) can deliver a specific capacity of 196 mC cm(-2) (326 mF cm(-2)) at a current density of 2 mA cm(-2) and a 69% capacity retention even at 3800 C, which is much better than the traditional faradic materials. The electrochemical analyses reveal the energy storage behavior of GO@Fc-MS is a fast surface controlled redox process. The electrode can be assembled into an asymmetric device which exhibits excellent cycling stability (no noticeable fading after 10 0 0 0 cycles) and competitive energy densities (respectively 17.7 or 9.2 mu Wh cm(-2) at power densities of 0.53 or 13.7 mW cm(-2)). These results open up new opportunities for pseudocapacitive materials based on electroactive inorganic frameworks bearing surface-tethered molecular redox sites with high energy storage capability. (C) 2020 Elsevier Ltd. All rights reserved.