Nitrogen-rich porous carbonaceous materials have shown great potential in energy storage and conversion applications due to their facile fabrication, high electronic conductivity, and improved hydrophilic property. Herein, three-dimensional porous N-rich carbon foams are fabricated through a one-step carbonization-activation method of the commercial melamine foam, and displaying hierarchically porous structure (macro-, meso-, and micro-pores), large surface area (1686.5 m² g⁻¹), high N-containing level (3.3 at%), and excellent compressibility. The as-prepared carbon foams as electrodes for quasi-solid-state supercapacitors exhibit enhanced energy storage ability with 210 F g⁻¹ and 2.48c at 0.1 A g⁻¹, and150 F g⁻¹ and 1.77 F cm⁻² at 1 A g⁻¹, respectively. Moreover, as an electrode for lithium-based dual-ion capacitor, this distinctive porous carbon also delivers remarkable specific capacitance with 143.6 F g⁻¹ at 0.1 A g⁻¹ and 116.2 F g⁻¹ at 1 A g⁻¹. The simple preparation method and the fascinating electrochemical performance endow the N-rich porous carbon foams great prospects as high-performance electrodes for electrochemical energy storage.

富氮多孔碳质材料因其制造简便，高电导率和改善的亲水性而在储能和转化应用中显示出巨大潜力。在此，通过商用三聚氰胺泡沫的一步碳化活化方法制造了三维多孔富氮碳泡沫，并显示出分层的多孔结构（大孔，中孔和微孔），大表面积（ 1686.5 m ²  g ^-1），高的含氮量（3.3 at％）和出色的可压缩性。所制备的作为准固态超级电容器电极的碳泡沫在210 F g ^-1和2.48c在0.1 A g ^-1和150 F g ^-1时表现出增强的储能能力和在1 A g ^-1下的1.77 F cm ^-2。另外，作为基于锂的双离子电容器的电极，这种独特的多孔碳还提供显着的比电容与143.6 F G ^-1在0.1 A克^-1和116.2 F G ^-1 1个A G ^-1。简单的制备方法和令人着迷的电化学性能赋予了富氮多孔碳泡沫作为电化学储能的高性能电极的广阔前景。