Citation: LU Xin-Mei, WU Quan-Fu, MI Hong-Yu, ZHANG Xiao-Gang. Electrochemical Capacitance of Camphorsulfonic Acid Doped Polyaniline Microtubes Prepared at Low Temperature[J]. Acta Physico-Chimica Sinica, 2007, 23(06): 820-824. doi: 10.3866/PKU.WHXB20070605
低温合成樟脑磺酸掺杂聚苯胺微管的电化学电容行为
在低温条件下合成了长约为2-3 μm, 外径约为300-400 nm 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522 F·g-1.
English
Electrochemical Capacitance of Camphorsulfonic Acid Doped Polyaniline Microtubes Prepared at Low Temperature
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-transforminfrared (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 od stability and cyclic performance, and the specific capacitance reached up to 522 F·g-1.
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