School of Textile and Materials Engineering, Dalian Polytechnic University, Dalian 116034, P.R. China.
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P.R. China.
Dalton Trans. 2022 Aug 16;51(32):12125-12136. doi: 10.1039/d2dt01750d.
Biomass-based porous carbon materials have attracted considerable attention because of their simple, low-cost, green, and pollution-free preparation process. Owing to their unique tubular structure and subsequent activation process, they often have a well-developed pore structure. Biomass-based carbon materials with three-dimensional hierarchical pores and polyatomic doping are regarded as promising electrode materials in the field of energy storage. In this study, cornstalk was used as the biomass and a pioneering approach was used to prepare porous carbon co-doped with N, B, and P. The B,N,P-codoped porous carbon has a three-dimensional honeycomb-like network structure with uniformly distributed and interwoven macro-, meso-, and micropores. Furthermore, it has an ultra-high specific surface area of 3123.5 m g, a high specific capacitance of 342.5 F g at a current density of 0.5 A g, and an energy density of up to 26.18 W h kg. This study demonstrates a multi-element co-doping strategy that enhances the performance of cornstalk as a precursor of a supercapacitor electrode material and has important implications in the high-value-added utilisation of waste straw.
生物质基多孔碳材料因其简单、低成本、绿色和无污染的制备工艺而受到广泛关注。由于其独特的管状结构和随后的活化过程，它们通常具有发达的孔结构。具有三维分级孔和多原子掺杂的生物质基碳材料被认为是储能领域有前途的电极材料。在本研究中，玉米秸秆被用作生物质，并采用开创性的方法制备了 N、B 和 P 共掺杂的多孔碳。B、N、P 共掺杂的多孔碳具有三维蜂窝状网络结构，具有均匀分布和交织的大孔、中孔和微孔。此外，它具有超高的比表面积 3123.5 m²/g，在电流密度为 0.5 A/g 时的比电容高达 342.5 F/g，能量密度高达 26.18 W h/kg。本研究展示了一种多元素共掺杂策略，可提高玉米秸秆作为超级电容器电极材料前体的性能，对秸秆等高附加值利用具有重要意义。
