Abstract Nitrogen-doped ordered mesoporous carbon spheres (N-OMCS) were prepared by a facile one-pot soft-templating and one-step pyrolysis method. The as-obtained N-OMCS possesses an average diameter of around 300 nm, a moderate specific surface area of 439 m2 g−1 and uniform mesopore size at around 5.0 nm. Owing to the ordered meso-structure and nitrogen doping, the N-OMCS materials, when used as supercapacitor electrodes, delivers a high specific capacitance of 288 F g−1 at a current density of 0.1 A g−1. More remarkably, the N-OMCS electrode shows excellent rate capability with 66% capacitance retention at an ultrahigh current density of 50 A g−1 and outstanding cycling stability with almost no degradation over 25,000 cycles. The work would open up a new avenue to synthesize carbon spheres with mesoporous structure and nitrogen doping for high-performance supercapacitor applications.

中文翻译：

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用于高倍率和长循环寿命超级电容器的氮掺杂有序介孔碳球的一锅法合成

摘要 采用简便的一锅软模板一步热解法制备了氮掺杂有序介孔碳球（N-OMCS）。所获得的 N-OMCS 具有约 300 nm 的平均直径、439 m2 g-1 的中等比表面积和约 5.0 nm 的均匀中孔尺寸。由于有序的介观结构和氮掺杂，N-OMCS 材料在用作超级电容器电极时，在 0.1 A g-1 的电流密度下提供 288 F g-1 的高比电容。更值得注意的是，N-OMCS 电极显示出优异的倍率性能，在 50 A g-1 的超高电流密度下具有 66% 的电容保持率和出色的循环稳定性，在 25,000 次循环中几乎没有退化。