低温合成樟脑磺酸掺杂聚苯胺微管的电化学电容行为

Electrochemical Capacitance of Camphorsulfonic Acid Doped Polyaniline Microtubes Prepared at Low Temperature

在低温条件下合成了长约为2-3μm,外径约为300-400nm的樟脑磺酸掺杂聚苯胺微管.扫描电镜(SEM)和透射电镜(TEM)显示,生成的聚苯胺微管管径受樟脑磺酸浓度的影响,高浓度的掺杂剂有利于管状聚苯胺的形成.采用交流阻抗、循环伏安、恒流充放电等测试技术对不同产物的电化学电容行为进行了研究,结果表明,苯胺单体与樟脑磺酸的摩尔比为1∶1时所得掺杂态聚苯胺电极具有较好的循环稳定性,单电极比电容达到522F·g-1.

Polyaniline（PANI） microtubes were prepared at low temperature with camphorsulfonic acid （CSA） as dopant. The structure and morphology of the microtubes were examined by Fourier-transform infrared （FTIR） spectroscopy, scanning electron microscopy （SEM）, and transmission electron microscopy （TEM）. The length of the microtubes was 2-3 μm and the outer diameter was 300-400 nm. The results indicated that the higher concentration of dopant was liable to the PANI-CSA microtube formation. Electrochemical capacitance properties of the doped polyaniline electrode were investigated by means of cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge/discharge measurements. When the molar ratio of aniline/CSA was 1：1, polyaniline had a good stability and cyclic performance, and the specific capacitance reached up to 522 F·g^-1.