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

ABSTRACT: 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 NH₄F) adsorbed on the (001) crystal plane of birnessite, the thickness of ultrathin birnessite films is regulated to ≈3 nm, providing abundant electrochemical active sites. By constructing high-speed electronic transfer routes with conductive carbon black (CCB) and carbon nanotubes (CNTs), an SPB/CCB/CNTs electrode delivers a high capacitance of 278.6 F g^-1 with an optimal high mass loading of

SUBMITTER: Zhu S 

PROVIDER: S-EPMC12752614 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature