Synthesis of one-dimensional hierarchical mesoporous carbon for supercapacitors

One-dimensional carbon-based materials suffer from inherent limitations such as structural collapse and high mass transfer resistance. In this study, a novel single-micelle-based dual-templates assembly strategy of using PS-PVP-PEO single micelles as soft templates and one-dimensional SiO₂ as hard templates was adopted.Utilizing dopamine as the carbon and nitrogen source, one-dimensional mesoporous nitrogen-doped carbon nanorods (1D N-mCN) with hierarchical porous architecture were successfully prepared. Such hierarchical porous material features unique rich spherical pores with a specific surface area of 494 m² /g and uniformly distributed nitrogen doping sites. Hence, this kind of 1D hierarchical mesoporous carbon material exhibits a specific capacitance of 320 F/g at 1 A/g, a capacity retention rate of over 72% at a high rate of 10 A/g, and only a 11% capacity decay after 5000 cycles. These properties effectively address the inherent defects aformentioned (structure collapse and high mass transfer resistance) of conventional carbon-based materials, laying a solid foundation for the development of high-performance energy storage devices.