N-Doped 3D bubble-like porous graphene was synthesized via a simple template directed method using polystyrene nanospheres as a template and low-cost industrial melamine as the nitrogen source. The as-synthesized N-3DPGX possessed a high specific surface area, uniform and controllable porous structure and high nitrogen doping content. Benefiting from these features, the as-obtained N-3DPG4 as an anode for sodium ion batteries delivered a high specific capacity of 310 mA h g⁻¹ after 500 cycles at a current density of 0.2 A g⁻¹, and also excellent rate capability as high as 169 mA h g⁻¹ at 10 A g⁻¹. This simple synthetic method, unique porous structure and outstanding electrochemical performance demonstrated that N-3DPG is a promising candidate for application in sodium ion batteries for large-scale electrochemical energy storage.

中文翻译：

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高性能钠离子电池用掺氮3D气泡状多孔石墨烯的体系结构设计†

通过简单的模板指导方法，以聚苯乙烯纳米球为模板，以低成本工业三聚氰胺为氮源，合成了N掺杂的3D气泡状多孔石墨烯。合成后的N-3DPG X具有较高的比表面积，均匀可控的多孔结构和较高的氮掺杂量。得益于这些特性，作为钠离子电池阳极的N-3DPG4可以在500次循环后以0.2 A g ^-1的电流密度提供310 mA hg ^-1的高比容量，以及出色的倍率性能。高达169毫安汞柱^-1以10 A G ^-1。这种简单的合成方法，独特的多孔结构和出色的电化学性能证明，N-3DPG是用于大规模电化学储能的钠离子电池的有前途的候选者。