Tailored Design of 3D Hierarchically Porous Carbons from Metal-Oxocarbon Anion Coordination Complexes

摘要

Porous carbons are nowad ays used in many technologically important applications such as catalysis, biomedicine, energy storage, gas storage and separation which is due to their versatile and interesting properties.[1,2] For energy storage applications, a high surface area, an appropriate pore size and a good pore connectivity of the electrode material are crucial for the performance of supercapacitors.[3] Over the past years, there have been many studies reporting on porous carbon materials with high surface area.[4,5,6] But in many cases a unimodal pore size distribution cannot satisfy the high performance of supercapacitors, limiting the performance in terms of low conductivity and high ion transport resistance within the pores. Recent studies have shown that hierarchically porous carbons, which contain interconnected micro-, meso- and macropores are attractive candidates for high performance electrode materials since they combine the advantages of the different pore size regimes, such as high ion accessible surface area and high ion transport rate. [7] However, most present synthetic strategies to generate hierarchically porous carbon include combinations of templating and activation processes which are expensive as well as material and time consuming. [8] Therefore, the development of convenient, scalable, facile and efficient synthesis methods is highly desirable.[9]