摘要
利用苯胺原位化学聚合合成聚苯胺包覆凹凸棒石,再经过高温热处理得到氮掺杂碳包覆凹凸棒石。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、傅立叶转换红外线光谱(FTIR)、差热分析法(DTA)对样品形貌和化学结构进行表征,利用循环伏安法、恒电流充放电及交流阻抗技术研究其用作超级电容器电极材料时的电化学性能。研究表明,氮掺杂碳包覆凹凸棒石在6 mol·L^(–1)的KOH电解液中具有较好的电容性能,在20 m V·s^(–1)的扫速下质量比电容可达161.9 F·g^(–1),且该复合材料具有较小的内阻和良好的电容稳定性。
The attapulgite coated with nitrogen-doped carbon was prepared by high temperature heat treatment of the attapulgite coated with polyaniline, which was synthesized by in-situ chemical polymerization of aniline. The morphology and chemical structure of the samples were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, Fourier transform infi-ared spectroscopy （FTIR）, conversion analysis for differential thermal analysis （DTA）. The electrochemical performances of the composites as the electrode materials for supercapacitors were investigated by cyclic voltammetry, gslvsnostantic changing-discharging and electrochemical impedance spectroscopy. The results show that the attapulgite coated with nitrogen-doped carbon from polyaniline has a good capacitance performance in 6 mol·L-1 aqueous KOH solution, its specific capacitance can reach 161.9 F·g-1 at the scan rate of 20 mV·s-1 and it also exhibits a low inter resisitance and a good stability of the temperature coefficient of capacitance.
出处
《电子元件与材料》
CAS
CSCD
2016年第1期68-72,共5页
Electronic Components And Materials
关键词
超级电容器
碳材料
氮掺杂
包覆
凹凸棒石
电化学性能
supercapacitor
carbon
nitrogen-doping
coating
attapulgite
electrochemical performance
