Nitrogen-doped porous activated carbon was prepared via a hydrothermal process using glucosamine as both carbon and nitrogen source without any template. After activated by KOH at 600–800 °C, porous structure formed with a large specific surface area of 784–1836 m² g⁻¹ and pore volume of 0.46–1.10 cm³ g⁻¹. The activated N-doped (1.71–2.81 at%) carbon structure with interconnected micro and mesoporous structures exhibits excellent electrochemical performance as supercapacitor electrode, demonstrating a high specific capacitance of 244–313 F g⁻¹ at 0.5 A g⁻¹ and a good cyclic stability with 92.7–93.9% capacitance retention over 5000 cycles in 6 M KOH aqueous solution. The all-solid-state symmetric supercapacitor using the N-doped porous carbon electrodes and PVA/KOH gel as electrolyte reveals an energy density of 7.2 W h kg⁻¹ at a power density of 250 W kg⁻¹ and outstanding stability of 93% capacitance retention after 5000 cycles at 2 A g⁻¹. The outstanding electrochemical performance of N-doped porous carbon makes it a potential candidate for electrical double-layer capacitor electrode material.

氮掺杂的多孔活性炭是通过水热法制备的，使用氨基葡萄糖作为碳源和氮源，没有任何模板。在600–800°C下被KOH活化后，形成的多孔结构具有大的比表面积784–1836 m ²  g ^-1和孔体积为0.46-1.10 cm ³  g ^-1。具有互连的微孔和中孔结构的活性N掺杂（1.71-2.81 at％）碳结构具有出色的电化学性能，可作为超级电容器电极使用，表明在0.5 A g ^-1时具有244-313 F g ^-1的高比电容在6 M KOH水溶液中经过5000次循环后，具有良好的循环稳定性和92.7–93.9％的电容保持率。使用N掺杂多孔碳电极和PVA / KOH凝胶作为电解质的全固态对称超级电容器在250 W kg ^-1的功率密度下显示出7.2 W h kg ^-1的能量密度和93％的出色稳定性5000次循环后在2 A g ^-1下的电容保持率。N掺杂多孔碳的出色电化学性能使其成为双电层电容器电极材料的潜在候选者。