Template-Free Formation of Regular Macroporosity in Carbon Materials Made from a Folded Polymer Precursor.

摘要: Porous carbon materials attract great interest in a wide range of applications such as batteries, fuel cells, and membranes, due to their large surface area, structural compositional tunability, chemical stability. While micropores are typically obtained when preparing by pyrolysis, the fabrication mesoporous, especially macroporous carbons is more challenging, yet important for enhancing mass transport. Herein, template-free regular prepared from mixture unfolded (linear) folded (single-chain nanoparticles, SCNP) polyvinylpyrrolidone chains. having same composition, different molecular architectures lead phase separation even before creating dense cell architecture, which retained upon carbonization. Upon increasing SCNP content, homogeneity pore network increases specific area enlarged 3-5-fold, until ideal properties at 75% SCNP, observed high-resolution scanning electron microscopy N2 physisorption porosimetry. The further investigated hydrazine oxidation electrocatalysts, demonstrating link between evolving morphology current density. Importantly, this study demonstrates role polymer architecture macroporosity templating materials, providing new approach develop complex without need external templating.