Confinement-controlled Water Engenders High Energy Density Electrochemical-double-layer Capacitance
This study demonstrates that leveraging the unique dielectric anomalies of water under nano-confinement at carbon-based interfaces enables the creation of a high-energy-density, electrolyte-free "water-only" electrochemical double-layer capacitor that rivals existing batteries and supercapacitors while offering a sustainable energy storage solution.