A kind of heteroatom-doped carbon aerogel and preparation method thereof

Abstract

The invention discloses heteroatom doped carbon aerogel and a preparation method thereof. The method comprises the following steps: directly and evenly grinding zinc salt containing crystal water and an organic ligand containing heteroatom in a mortar, and then performing carbonization treatment on a mixed material to obtain the heteroatom doped carbon aerogel. The method disclosed by the invention achieves ultrathin-wall heteroatom doped carbon aerogel synthesis through a one-step method, and has the advantages of simple and controllable technology, short preparation period, low cost and high heteroatom doping efficiency. The heteroatom doped carbon aerogel disclosed by the invention has a three-dimensional porous structure and an ultrathin-wall structure, a specific surface area of the heteroatom doped carbon aerogel is 1028.7 to 1921.4m<2>g<-1>m<2>g<-1>, an average pore size is 0.9 to 1nm, and a wall thickness is 3 to 5nm; the heteroatom doped carbon aerogel has the advantages of ultrathin wall, large specific surface area, high porosity, multiple active sites, high atom utilization rate, large contact area with electrolyte and the like; the heteroatom doped carbon aerogel can enable a material to have good electric conductivity and high chemical reaction reactivity.

Description

technical field

[0001] The invention belongs to the field of carbon airgel preparation, and in particular relates to an ultrathin-walled heteroatom-doped carbon airgel and a preparation method thereof. Background technique

[0002] Airgel is a kind of dry gel material whose dispersion medium is air. Airgel contains a large amount of air, its solid phase and pore structure are nanoscale, and the porosity is above 80%. This structure not only makes airgel the solid material with the smallest density in the world, but also makes airgel show its unique properties in mechanics, acoustics, heat, optics and other aspects. Its fine nanostructure makes the thermal conductivity of the material Very low, and has excellent acoustic impedance and sound insulation performance.

[0003] Usually, the preparation of airgel mainly includes two processes of gel preparation and drying treatment. The preparation of wet gel mainly adopts sol-gel technology, and the drying treatment methods mai...

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