Highly efficient supercapacitor devices are fabricated with the hybrid nanocomposite material and biomass-derived N-doped activated carbon with tunable morphology, composition and structures. NiCo₂O₄ materials with different morphologies including spherical, urchin, rod and granular are synthesized using different surfactants. These electrode materials display the maximum specific capacity of 419, 543, 506, and 456 C g⁻¹ at 1 A g⁻¹ respectively in 2 M KOH. The optimized urchin-like NiCo₂O₄ is hybridized with different concentration of ZnCo₂O₄ nanosheets. The hybridization process significantly increased the specific capacity to 1029 C g⁻¹ at 1 A g⁻¹ for NiCo₂O₄@ZnCo₂O₄-2 (NZC2). In order to make the hybrid supercapacitor device, honeycomb porous structured N-doped activated carbon is prepared with the Ricinus communis seed. The prepared material shows an interconnected pore structure with a high nitrogen content and exhibits the maximum specific capacity of 236 C g⁻¹ at a current density of 1 A g⁻¹. The hybrid supercapacitor device made from NZC2 and the N-doped activated carbon offers the highest energy density of 101.6 W h kg⁻¹ with the corresponding power density of 1.62 kW kg⁻¹.

用杂化的纳米复合材料和具有可调形态，组成和结构的生物质衍生的N掺杂活性炭制造高效的超级电容器。使用不同的表面活性剂合成了具有球形，野孩子，棒状和颗粒状不同形态的NiCo ₂ O ₄材料。这些电极材料在2 M KOH中分别在1 A g ^-1下显示出最大比容量419、543、506和456 C g ^-1。优化的海胆状镍钴₂ ö ₄杂交用不同浓度的碳酸锌的₂ ö ₄纳米片。杂交过程的比容量显著增加至1029 C g还^-1 1 A G ^-1为镍钴₂ ö ₄ @ZnCo ₂ ø ₄ -2（NZC2）。为了制造混合超级电容器装置，用蓖麻种子制备蜂窝状多孔结构的N掺杂活性炭。所制备的材料显示出具有高氮含量的互连孔结构，并且在1A g ^-1的电流密度下显示出236 C g ^-1的最大比容量。由NZC2和N掺杂活性炭制成的混合超级电容器装置提供的最高能量密度为101.6 W h kg ^-1对应的功率密度为1.62 kW kg ^-1。