KOH-activated micrometer-thick amorphous carbon nanofoam as a binder-free supercapacitor electrode with high-rate performance.

ABSTRACT: We demonstrate an aqueous supercapacitor based on self-standing, porous, hydrophilic, and 26-μm-thick activated carbon nanofoam. The device delivers an areal (volumetric) capacitance of 95.4 mF/cm² (18.3 F/cm³) at 2 mA with retention of 103% at 20 mA and achieves a voltage of 1 V, superior compared to pristine and annealed examples.

SUBMITTER: Ghosh S 

PROVIDER: S-EPMC12305501 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature