• An eco-efficient synthetic route was developed to establish carbon superstructures with enhanced exposed nitrogen-rich active facets.

• The synergistic effect of the 3D interconnected superstructures and the high nitrogen-doping content endows the N-rich carbon superstructures (NCS-5) with not only increased potassium-ion storage capabilities but also superior rate and cycling performance.

• The regulation of the nitrogen doping types and morphology of NCS-5 is also discussed in detail based on the experiment results and density functional theory calculations.

中文翻译：

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通过操纵氮掺杂物质和形态来增强 3D 碳超结构的钾离子存储

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  开发了一种生态高效的合成路线，以建立具有增强的暴露的富氮活性面的碳上部结构。

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  3D互连超结构和高氮掺杂含量的协同效应赋予富氮碳超结构（NCS-5）不仅具有增加的钾离子存储能力，而且具有优异的倍率和循环性能。

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  基于实验结果和密度泛函理论计算，还详细讨论了NCS-5的氮掺杂类型和形貌的调控。