We report a porous carbon material (NPCM) with a high N content as a high-performance supercapacitor electrode material which was prepared by a simple activation-doping process using Metaplexis Japonica shell as the carbon precursor, ammonium chloride as the nitrogen source and zinc chloride as the activation agent. Its high electrical conductivity, large ion-accessible surface area and fast ion transport ability make it possible to achieve a high mass loading of NPCM per area of the electrode and a high energy and high power density supercapacitor. An electrode with a low NPCM mass loading of 1 mg cm⁻² has a gravimetric specific capacitance of 457 F g⁻¹ and an areal specific capacitance of 47.8 μF cm⁻². At a much high NPCM loading of 17.7 mg cm⁻² it has a high gravimetric capacitance of 161 F g⁻¹. Furthermore, an assembled NPCM//NPCM symmetric supercapacitor with an optimal NPCM loading of 12.3 mg cm⁻² delivered a high specific energy of 12.5 Wh kg⁻¹ at an ultrahigh power of 80 kW kg⁻¹ in 1 mol L⁻¹ Na₂SO₄. The achievement of such high-energy and high-power densities using NPCM will open exciting opportunities for carbon-based supercapacitors in many different applications.

我们报告了一种高N含量的多孔碳材料（NPCM）作为高性能超级电容器电极材料，它是通过使用Metaplexis粳壳作为碳前体，氯化铵作为氮源和氯化锌的简单活化掺杂工艺制备的作为活化剂。其高电导率，较大的离子可及表面积和快速的离子传输能力，使得可以在电极的每单位面积上实现NPCM的高质量负载，并获得高能量和高功率密度的超级电容器。低NPCM质量负载为1 mg cm ^-2的电极的重量比电容为457 F g ^-1，面积比电容为47.8μFcm ^-2。在17.7 mg / cm的高NPCM负载下^-2具有161 F g ^-1的高重力电容。此外，具有最佳NPCM负载12.3 mg cm ^-2的组装NPCM // NPCM对称超级电容器在1 mol L ^-1 Na _2中以80 kW kg ^-1的超高功率提供了12.5 Wh kg ^-1的高比能。SO ₄。使用NPCM实现如此高能量和高功率密度将为碳基超级电容器在许多不同应用中带来令人兴奋的机遇。