Nitrogen-doped interconnected carbon nanosheets from pomelo mesocarps for high performance supercapacitors

作者：Peng, Hui; Ma, Guofu^*; Sun, Kanjun; Zhang, Zhiguo; Yang, Qian; Lei, Ziqiang^*

来源：Electrochimica Acta, 2016, 190: 862-871.

DOI：10.1016/j.electacta.2015.12.195

• Pomelo mesocarps
• Carbon nanosheets
• Nitrogen-doped
• Supercapacitors

Here, we report a novel type of nitrogen-doped porous interconnected carbon nanosheets derived from an easily gained and green plant-waste (pomelo mesocarps) by simultaneous activation, carbonization and nitrogen-doped processes using CaCl2 as activating agent and urea as nitrogen source. The nitrogen doped pomelo mesocarps-based nanosheet carbon (N-PMNC) displays an interconnected sheet-like morphology, a high specific surface area (974.6 m(2) g (1)), a porous architecture and a high nitrogen doping content (9.12 wt%). The N-PMNC based supercapacitor exhibited superior electrochemical performance with high specific capacitance of 245 F g (1) at 0.5 Ag (1) and excellent rate capability (72% capacitance retention ratio even at 20 Ag (1)) in 2 mol L (1) KOH electrolyte. Furthermore, N-PMNC based symmetric supercapacitor possesses high specific energy of 14.7 Wh kg (1) at a power density of 90 W kg (1) operated in the wide voltage range of 1.8 V in aqueous neutral Na2SO4 electrolyte, and shows outstanding cyclic stability.

• 出版日期2016-2-1
• 单位兰州城市学院; 西北师范大学