Boosting Electrochemical Capacitive of Ultrathin Shower-Pouf Birnessite-Type MnO2 for Porous High-Mass-Loading Energy Storage Device

science

High-mass-loading electrodes are critical for the economic viability and practicability of energy storage devices. Here, shower-pouf-like birnessite (SPB) with dense-core-free nanostructures are synthesized via a cost-effective strategy, which significantly reduces the content of electrochemical dead mass caused by insufficient ion diffusion. Ascribed to the F^(-) (from NH(4)F) adsorbed on the (001) crystal plane of birnessite, the thickness of ultrathin birnessite films is regulated to ≈3 nm,...

NCBI     Oct 05, 2025