Activated carbon (AC) is a perfect cathode for zinc-ion hybrid capacitors (ZIHCs) as a result of its excessive particular floor space, rational pore buildings, good electrical conductivity, and chemical stability. Nevertheless, the precise capability of AC stays far beneath theoretical limits, primarily as a result of its poor wettability, which ends up in insufficient penetration into deep micropores/mesopores, leaving lively websites inaccessible and hindering ion diffusion and adsorption, thus degrading efficiency. Herein, we report a room-temperature air plasma technique for exactly tuning oxygen useful teams on AC cathodes whereas preserving their bulk construction intact. By controlling the plasma therapy time, the floor content material of the teams is exactly modulated. These oxygen useful teams considerably improve the electrolyte wettability of the AC electrode, growing the efficient interface space accessible to electrolyte ions. This promotes environment friendly ion adsorption and diffusion, resulting in markedly improved particular capacitance, charge functionality, and biking stability. Furthermore, the assembled large-area pouch cells reveal wonderful stability and sensible applicability. This work highlights the significance of carbon electrode floor properties in enhancing the electrochemical efficiency and can encourage additional floor modification methods for superior vitality storage units.
