Morphology-dependent synergy in high-performance MnO₂/activated carbon electrodes <i>via</i> facile dry-mixing.

ABSTRACT: The pursuit of high-performance supercapacitors (SCs) often revolves around developing novel nanostructures through complex chemical synthesis, which poses challenges for scalable production. Herein, we demonstrate that exceptional electrochemical properties can be achieved by a simple dry-mixing of activated carbons (ACs) and manganese dioxide (MnO₂). A series of ACs with distinct morphologies were prepared and composited with petal-like MnO₂ clusters. We systematically investigated the profound impact of AC morphology on the synergistic effects with MnO₂. The optimal hybrid electrode, comprising spherical carbon (ACS-2.5) and 25 wt% MnO₂, delivered a superior gravimetric capacitance of 430.44 F g^-1, a remarkable volumetric capacitanc

SUBMITTER: Cao X 

PROVIDER: S-EPMC12636274 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature