Capacitance, charge dynamics, and electrolyte-surface interactions in functionalized carbide-derived carbon electrodes

摘要: Abstract This study analyzed the dynamics of ionic liquid electrolyte inside defunctionalized, hydrogenated, and aminated pores carbide-derived carbon supercapacitor electrodes. The approach tailors surface functionalities tunes nanoporous structures to decouple influence pore wall composition on capacitance, resistance, long-term cyclability. Quasi-elastic neutron scattering probes self-diffusion properties electrode-ion interactions molecules confined in functionalized pores. Room-temperature are strongest when hydrogen-containing groups present surface. property translates into higher capacitance greater ion transport through during electrochemical cycling. Unlike hydrogenated pores, do not favorably interact with ions and, subsequently, outperformed by defunctionalized surfaces.