用于超级电容器电极材料的聚苯胺基碳(英文)

在不同温度下碳化硫酸掺杂的聚苯胺制备了含杂原子(氮和氧原子)的新型碳材料.分别通过扫描电镜、元素分析仪、X射线光电子能谱仪和比表面积测试仪对这些碳材料的形貌特征、元素组成、表面化学组成和比表面积进行了表征.用循环伏安法、恒电流充放电法和交流阻抗法对其进行了电化学性能的研究.研究结果表明,在温度为800℃下碳化聚苯胺得到的碳有很好的电化学性能,尽管它的比表面积很小(325m·2g-1),但在0.5A·g-1电流密度下其比电容高达153F·g-1.它的高比电容可能与其含有合适比例的杂原子(氮和氧原子)有关,因为合适比例的氮和氧杂原子能够产生最大的赝电容.这些结果表明这种碳材料是一种很有发展前景的超级电容器电极材料.

Polyaniline-Based Carbon for a Supercapacitor Electrode

Novel carbon materials containing heteroatoms (nitrogen and oxygen) were prepared by carbonizing H2SO4 doped polyaniline at different temperatures. The morphology, elemental composition, surface chemical composition, and surface area of the as-prepared samples were investigated by scanning electron microscopy (SEM), elemental analyzer, X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET) measurements. Electrochemical properties were studied by cyclic voltammetry (CV), galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS). The results show that the carbon prepared by carbonizing polyaniline at 800 ℃ has good electrochemical performance and its specific capacitance value is as high as 153 F·g-1 under a current density of 0.5 A·g-1, although it has a low specific surface area (325 m2·g-1). The high specific capacitance of this carbon is believed to be due to its proper proportion of heteroatoms (nitrogen and oxygen), which provide a large amount of pseudo-capacitance. This kind of carbon material can thus be used as a promising electrode material in supercapacitors.