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以碳化钙为前驱体,新鲜制备的高活性氯气为刻蚀剂,采用低温一步合成法制备了多孔结构的碳化钙骨架碳(CCDC).将CCDC用硝酸进行氧化处理后,在氩气保护下,分别用尿素、三聚氰胺在950℃下碳化,制备出富氮功能化的CCDC.采用红外光谱、扫描电镜、元素分析等手段对材料进行物理表征,发现功能化的CCDC有明显的氮、氧官能团存在,极大地改善了CCDC的结构和表面活性.将功能化的CCDC作电极材料并组装成超级电容器进行循环伏安、恒流充放电、循环寿命等电化学性能测试.结果表明,经硝酸、尿素、三聚氰胺处理后的CCDC电极,在1mol/LH2SO4中比电容分别达到181.5,210.8和225.4F·g-1,比处理前分别增长了17.3%,36.3%和45.7%,且循环5000次后,容量几乎没有衰减.
Using calcium carbide as precursor and freshly prepared high-activity chlorine as etchant, the porous structure of calcium carbide framework carbon (CCDC) was prepared by low temperature one-step synthesis method.The CCDC was oxidized with nitric acid, , Were respectively carbonized with urea and melamine at 950 ℃ to prepare a nitrogen-rich functionalized CCDC.The physical characterization of the material by infrared spectroscopy, scanning electron microscopy, elemental analysis and other means found that the functionalized CCDC has obvious nitrogen and oxygen functional groups Which has greatly improved the structure and surface activity of CCDC.The functionalized CCDC was used as the electrode material and assembled into an ultracapacitor for cyclic voltammetry, constant current charge-discharge, cycle life and other electrochemical tests.The results showed that, The specific capacitance of the CCDC electrode treated with urea and melamine reached 181.5, 210.8 and 225.4F · g-1 respectively in 1mol / LH 2 SO 4, increased by 17.3%, 36.3% and 45.7% The capacity is almost no attenuation.