At the same time, they mentioned that there is a clear difference in the interfacial density profiles between lattice DFT and simulations. Undoubtedly, consistent predictions between theories and simulations are required to assert the reliability and accuracy of theoretical methods. Polymer DFT (PDFT) is a well-established statistical mechanical theory for complex fluids, in which the polymer chains in fluids are modeled as tangentially jointed hard spheres with considering excluded-volume interactions and electrostatic interactions, etc. Successfully, the density profile predictions of polymers in fluids from PDFT agree well with the simulation results. Yet, the application of PDFT in grafted PBs is not apparent owing to the physical constrains from the grafting behaviors. In other words, the limited accessible space of grafted PBs greatly alters the translational and conformational entropies of the untethered polymer chain in the vicinity of the surface. In the last few decades, PDFT has been used to study grafted PBs. However, the significant deviations in the interfacial density distributions between PDFT and simulations are found in the literature. The accurate and reliable predictions of PDFT leave much to be desired in the relevant thermodynamic and structural properties (e.g., the capacitance of supercapacitors).