论文部分内容阅读
用CVD法合成微米螺旋碳纤维(carbon microcoils,CMCs),用硝酸和KOH等对其进行纯化和活化处理,用扫描电镜(SEM)、光学显微镜观察其形貌,用X-射线能谱仪分析反应后催化剂成分,并采用恒流充放电、循环伏安、交流阻抗等电化学方法分析CMCs超级电容器性能。结果表明,在50 mA·g~(-1)电流密度条件下,初始CMCs产物的比电容为12.7 F·g~(-1),纯化处理后的比电容为41.4 F·g~(-1),活化处理后则达到111.1 F·g~(-1),为处理前的8.75倍。表明纯化特别是活化处理使其电容性能显著提高。
The carbon microcoils (CMCs) were synthesized by CVD and purified by nitric acid and KOH. Morphology was observed by scanning electron microscopy (SEM) and optical microscopy. The reaction was analyzed by X-ray energy dispersive spectroscopy After the catalyst components, and using constant current charge and discharge, cyclic voltammetry, electrochemical impedance spectroscopy and other electrochemical methods CMCs supercapacitor performance. The results showed that the specific capacitance of the initial CMCs was 12.7 F · g -1 at the current density of 50 mA · g -1, and the specific capacitance after purification was 41.4 F · g -1 ), And reached 111.1 F · g -1 after activation treatment, which was 8.75 times higher than that before treatment. It indicates that the purification, especially the activation treatment, significantly improves its capacitance.