Regular mesoporous nanosheets with mesoscopic high surface pore curvature and accelerated ion-transport channels

Abstract

Constructing two-dimensional (2D) porous heterogeneous superstructures with a high surface pore curvature at the mesoscopic scale remains a major challenge in materials science. Herein, we report a stable-monomicelle-assisted interface assembly method to prepare unique 2D hierarchical mesoporous heterogeneous carbon/MXene nanosheets with mesoscopic high surface pore curvature. In this hierarchical structure, MXene sheet is located at the center of the sandwich structure, and an ultrathin monolayer of uniform spherical mesopores is regularly arranged on both sides of the MXene nanosheets. Importantly, this interconnected 2D porous heterogeneous nanosheet endows a high surface pore curvature and abundant accessible surface area. In addition, the size of mesopores and the thickness of carbon layers are precisely controllable. Finally, we demonstrate that the 2D mesoporous heterogeneous carbon superstructure, which features channels for accelerated zinc-ion transport, exhibits a specific capacity of up to 158 mAh g⁻¹ and improved rate performance.