Nitrogen-doped porous microsphere carbons were prepared from glucose and aminourea through hydrothermal carbonization (HTC) followed by KOH activation. Aminourea used as nitrogen precursor contributes to the introduction of appropriate nitrogen content and well-developed porosity during KOH activation. The prepared samples exhibit particular nanostructure with high specific surface area and appropriate pore size distribution, which provides short ion diffusion channels and low-resistant pathways for the penetration and transportation of electrolyte. In addition, the doped-nitrogen atoms can give rise to the pseudo-capacitive behavior for as-prepared samples. Those special characteristics endow the final product with high specific surface area (2594 m² g⁻¹), high specific capacity (390 F g⁻¹ at 0.5 A g⁻¹), high rate capability (260 F g⁻¹ at 20 A g⁻¹), and long life span (90% retention over 10000 cycles). Therefore, nitrogen-doped porous microsphere carbons with excellent electrochemical performance show great potential in the field of electrochemical energy storage.

通过水热碳化（HTC），然后通过KOH活化，由葡萄糖和氨基脲制得氮掺杂的多孔微球碳。用作氮前体的氨基脲有助于在KOH活化过程中引入适当的氮含量和发达的孔隙度。所制备的样品表现出具有高比表面积和适当孔径分布的特定纳米结构，从而为电解质的渗透和运输提供了短的离子扩散通道和低电阻的通道。另外，掺杂的氮原子可引起制备样品的拟电容行为。这些特殊的特性使最终产品具有较高的比表面积（2594 m ²  g ^-1），高比容量（390 F G ^-1 0.5 A G ^-1），高倍率性能（260 F G ^-1在20 A G ^-1），和长寿命（超过10000次循环90％保留）。因此，具有优异的电化学性能的氮掺杂多孔微球碳在电化学储能领域显示出巨大的潜力。