Abstract The hierarchical porous carbon (HPC) materials have rich porous structure, high specific surface area and reasonable porosity for a wide range of applications in many fields, such as catalysis, adsorption, and energy storage, etc. Although some synthetic strategies have been developed, efficient preparing HPC materials remains challenging. In this work, we propose a method to prepare N-doped hierarchical porous carbon (NHPC) by acetone dissolution following co-assembly process. 1-Alkyl-3-methyl imidazole bromide ([C18Mim]Br), tetraethyl orthosilicate (TEOS) and resorcinol-formaldehyde were co-assembled to form a pleated sheet composite material, where [C18Mim]Br induced formation of the sheet structure and also led to nitrogen doping in the carbon skeleton. TEOS created a mesoporous structure and increased specific surface area, while acetone dissolved the oligomer of the resin, creating a macroporous structure, but destroying the morphology of the sheet. At an appropriate amount of acetone, the resulting NHPC exhibits the hierarchical porous structure, high specific surface area and N-doping characteristics. When used as a supercapacitor material, NHPC exhibits the specific capacitance is as high as 241 F g−1 at 1 A g−1. Furthermore, the symmetric supercapacitor manufactured with NHPC has a power density of 4.1 kW kg−1, an energy density of 2.56 Wh kg−1, and demonstrates excellent cycle stability of up to 92.82%, exhibiting the potential as good supercapacitor materials.

中文翻译：

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丙酮溶解制备用于超级电容器的N掺杂分级多孔碳

摘要 分级多孔碳（HPC）材料具有丰富的多孔结构、高比表面积和合理的孔隙率，在催化、吸附和储能等许多领域有着广泛的应用。 ，高效制备 HPC 材料仍然具有挑战性。在这项工作中，我们提出了一种在共组装过程后通过丙酮溶解制备 N 掺杂分级多孔碳 (NHPC) 的方法。1-烷基-3-甲基咪唑溴化物（[C18Mim]Br）、原硅酸四乙酯（TEOS）和间苯二酚-甲醛共组装形成褶皱片状复合材料，其中[C18Mim]Br诱导片状结构的形成，并且导致碳骨架中的氮掺杂。TEOS 创造了一种介孔结构并增加了比表面积，而丙酮溶解树脂的低聚物，形成大孔结构，但破坏了片材的形态。在适量的丙酮下，所得的 NHPC 表现出分层多孔结构、高比表面积和 N 掺杂特性。当用作超级电容器材料时，NHPC 在 1 A g-1 时表现出高达 241 F g-1 的比电容。此外，用NHPC制造的对称超级电容器的功率密度为4.1 kW kg-1，能量密度为2.56 Wh kg-1，并且表现出高达92.82%的优异循环稳定性，显示出作为优良超级电容器材料的潜力。所得的 NHPC 具有分级多孔结构、高比表面积和 N 掺杂特性。当用作超级电容器材料时，NHPC 在 1 A g-1 时表现出高达 241 F g-1 的比电容。此外，用NHPC制造的对称超级电容器的功率密度为4.1 kW kg-1，能量密度为2.56 Wh kg-1，并且表现出高达92.82%的优异循环稳定性，显示出作为优良超级电容器材料的潜力。所得的 NHPC 具有分级多孔结构、高比表面积和 N 掺杂特性。当用作超级电容器材料时，NHPC 在 1 A g-1 时表现出高达 241 F g-1 的比电容。此外，用NHPC制造的对称超级电容器的功率密度为4.1 kW kg-1，能量密度为2.56 Wh kg-1，并且表现出高达92.82%的优异循环稳定性，显示出作为优良超级电容器材料的潜力。