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为了高效利用废弃木质材料,将含有脲醛树脂的废弃中密度纤维板,经过500℃炭化得到炭化物,再以K2CO3为活化剂,m(K2CO3)∶m(炭化物)=3∶1,活化时间1 h及不同活化温度(700、750、800、850和900℃)条件下制得富N活性炭。通过X射线光电子能谱和元素分析对其结构进行表征,通过氮气吸附分析其比表面积和空隙结构。另外,制备双电层电容器,测试富N活性炭电极的恒流充放电曲线、倍率特性、伏安特性和阻抗特性表征其电化学性能。结果表明:活化温度800和850℃下制备的富N活性炭表面具有含N官能团,具有较大比表面积和总孔容积,最高达到1 037 m2/g和0.528 cm3/g,具有良好的吸附性能,表现出良好的电化学性能,质量比电容可达到219和193 F/g,适于作为双电层电极材料。
In order to make efficient use of waste wood materials, the waste medium density fiberboard containing urea formaldehyde resin was carbonized at 500 ℃ to obtain a mixture of m (K2CO3): m (charcoal) = 3: 1, activation time 1 h and K2CO3 N-activated carbons were prepared under different activation temperatures (700, 750, 800, 850 and 900 ℃). Its structure was characterized by X-ray photoelectron spectroscopy and elemental analysis, and its specific surface area and void structure were analyzed by nitrogen adsorption. In addition, an electric double layer capacitor was prepared to test the constant current charge / discharge curve, rate characteristic, voltammetry and impedance characteristics of the N-rich activated carbon electrode. The results showed that the N-rich activated carbons prepared at activation temperatures of 800 and 850 ℃ have N-containing functional groups with large specific surface area and total pore volume up to 1 037 m2 / g and 0.528 cm3 / g, which have good adsorption properties, Showing good electrochemical performance, the mass specific capacitance can reach 219 and 193 F / g, suitable as an electric double layer electrode material.