• Small cobalt nanoparticles are carefully encapsulated into a N-doped carbon shell (Co-NC) by calcining a Prussian blue analogue precursor.

• The presence of cobalt nanoparticles and Co-N bonds not only promotes adsorption behavior, but also reduces the diffusion energy barrier, enabling fast diffusion kinetics of K⁺ ions.

• The good diffusion kinetics and capacitive adsorption behavior of the Co-NC material synergistically contributes to enhanced potassium storage performances.

中文翻译：

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高度分散的钴纳米粒子嵌入氮掺杂石墨化碳中，用于快速和耐用的钾存储

• 通过煅烧普鲁士蓝类似物前体，将小的钴纳米粒子小心地封装到 N 掺杂的碳壳 (Co-NC) 中。

• 钴纳米颗粒和 Co-N 键的存在不仅促进了吸附行为，而且降低了扩散能垒，使 K ⁺离子的快速扩散动力学成为可能。

• Co-NC材料的良好扩散动力学和电容吸附行为协同地有助于提高钾储存性能。