Figure 6.

a) Pictorial model of surface interactions between three forms of dispersed fillers. Reproduced with permission.^{[ 87 ]} Copyright 2003, IOP Publishing. b) Schematic representation of Lewis acid–base interactions between polymer and SiO₂ nanoparticles. Reproduced with permission.^{[ 88 ]} Copyright 2016, American Chemical Society. c) Schematic illustration of the Li‐ion transport in composite polymer electrolyte owing to the Lewis acid–base effect. Reproduced with permission.^{[ 89 ]} Copyright 2016, American Chemical Society. d) LiAlO₂‐coated Al₂O₃ particles strengthening Lewis acid–base interactions. Reproduced with permission.^{[ 90 ]} Copyright 2021, Royal Society of Chemistry.