Intensified Energy Storage in High-Voltage Nanohybrid Supercapacitors <i>via</i> the Efficient Coupling between TiNb₂O₇/Holey-rGO Nanoarchitectures and Ionic Liquid-Based Electrolytes

Obtaining a comprehensive understanding of the energy storage mechanisms, interface compatibility, electrode–electrolyte coupling, and synergistic effects in carefully programmed nanoarchitectural electrodes complicated electrolyte systems will provide shortcut for designing better supercapacitors. Here, we report intrinsic relationships between electrochemical performances microstructures or composition complex nanoarchitectures formulated electrolytes. We observed that isolated TiNb2O7 nanoparticles provided both Faradaic intercalation contribution surface pseudocapacitance. The holey graphenes partitioned by not only fostered fast transport electrons ions but also additional electrical double-layer capacitance. charge contributions from diffusion-controlled process capacitive behaviors, charging, pseudocapacitance, were quantitatively distinguished different electrolytes including ionic-liquid mixture, various nanocomposite ionogel electrolytes, an organic LiPF6 electrolyte. A steered molecular dynamics simulation method was used to unveil underlying principles governing high-rate capability nanoarchitectures. High density high rate solid-state supercapacitors achieved using lithium-ion insertion its charge-transfer combination with non-Faradaic effects. work suggests practical high-voltage safety can be realized via efficient coupling emerging