Hierarchical N-doped porous carbons were synthesized using a self-templated and solvent-free assembly approach via directly heating green polyaspartic acid potassium. The samples prepared under different calcining temperatures were characterized, which exhibited the structural features of high pore volume (0.88-1.75 cm³/g) and large specific surface area (1592-3133 m²/g). Subsequently, these samples were applied for selective CO₂ capture and supercapacitor electrodes. The N-PCM-900 prepared at 900 ^oC afforded superb electrochemical performance, including extremely large specific capacitance (346 F/g at 1 A/g), high-rate capability (charge-discharge profiles at 20 A/g), and excellent cycle stability (96.86% retention after 1000 cycles) in KOH electrolyte (6 M). Moreover, N-PCM-900 simultaneously provided high CO₂ adsorption ability (4.63 mmol/g) at 273 K, and high ideal adsorption solution theoretical value (25) for capturing CO₂/N₂ at 298 K. The multifunctional porous carbon presented herein exhibited great potential for electrochemical energy storage and gas adsorption/separation.

通过直接加热绿色聚天冬氨酸钾，使用自模板和无溶剂组装方法合成了分级 N 掺杂多孔碳。对不同煅烧温度下制备的样品进行了表征，其具有高孔容（0.88-1.75 cm ³ /g）和大比表面积（1592-3133 m ² /g）的结构特征。随后，这些样品被应用于选择性CO ₂捕获和超级电容器电极。在 900 ^o C 制备的 N-PCM-900 具有极好的电化学性能，包括极高的比电容（346 F/g，1 A/g）、高倍率能力（20    A/g)，在 KOH 电解液 (6  M) 中具有出色的循环稳定性（1000 次循环后保持 96.86%）。此外，N-PCM-900 在 273 K 时同时提供高 CO ₂吸附能力（4.63  mmol/g），在 298 K时捕获 CO ₂ /N ₂ 具有高理想吸附溶液理论值（25）。在电化学储能和气体吸附/分离方面表现出巨大的潜力。