对甲苯磺酸掺杂聚(苯胺/中性红)复合物的乳液聚合法制备及电化学电容行为

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (3): 571.

对甲苯磺酸掺杂聚(苯胺/中性红)复合物的乳液聚合法制备及电化学电容行为

徐海丽, 曹琪, 王先友, 陈权启, 廖丽

湘潭大学化学学院, 环境友好化学与应用教育部重点实验室, 湘潭 411105

收稿日期:2009-05-31 出版日期:2010-03-10 发布日期:2010-03-10
通讯作者: 曹琪, 女, 博士, 副教授, 主要从事聚合物新型功能材料和电化学研究. E-mail: wjcaoqi@163.com
基金资助:
环境友好化学与应用教育部重点实验室课题(批准号： 10HJYH09)资助.

Preparation and Capacitive Performance of TSA-PANI/PNR Composites by Emulsion Polymerization

XU Hai-Li, CAO Qi*, WANG Xian-You, CHEN Quan-Qi, LIAO Li

College of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Xiangtan 411105, China

Received:2009-05-31 Online:2010-03-10 Published:2010-03-10
Contact: CAO Qi. E-mail: wjcaoqi@163.com
Supported by:
环境友好化学与应用教育部重点实验室课题(批准号： 10HJYH09)资助.

摘要/Abstract

摘要：

以对甲基苯磺酸(TSA)为掺杂剂和乳化剂, 过硫酸铵(APS)为引发剂, 采用现场乳液聚合方法合成了对甲基苯磺酸掺杂聚(苯胺/中性红)复合材料(TSA-PANI/PNR). 利用X射线衍射(XRD)和电子扫描显微镜(SEM)对共聚物复合材料的结构和形貌进行了分析和表征. 以此复合材料为活性物质制备电极, 以l mol/L H₂SO₄水溶液为电解液组装超级电容器, 通过恒电流充放电、循环伏安和交流阻抗等技术研究了其电化学性能. 研究结果表明, TSA-PANI/PNR电极具有比TSA/PANI更优良的电化学性能. 扫描速度为1 mV/s的循环伏安曲线计算结果表明, 其单电极比电容可达到1350 F/g, 而TSA/PANI在相同的扫速下其单电极比电容仅为1038 F/g; 在5 mA放电电流下, TSA-PANI/PNR组装的电容器首次充放电比电容可达到348 F/g, 1000次循环后容量保持87%.

关键词: 聚苯胺; 聚中性红; 共聚合; 对甲基苯磺酸; 乳液聚合; 超级电容器

Abstract:

Using paratoluenesulfonic acid(TSA) as dopant and emulsifier, and ammonium persulfate(APS) as initiator, the composites of polyaniline, TSA and neutral red(TSA-PANI/PNR) were synthesized by emulsion polymerization. The structure and morphology of the composites were investigated by X-ray diffraction(XRD) and scanning electron microscopy(SEM). Symmetric redox supercapacitor was assembled with TSA-PANI/PNR as active electrode material and an l mol/L H₂SO₄ aqueous solution as electrolyte. The electrochemical performances of the supercapacitors were characterized by galvanostatic charge-discharge, cyclic voltammetry and A.C. impedance spectroscopy. The results show that TSA-PANI/PNR composite exhibits outstanding electrochemical capacitor performance compared with TSA/PANI electrode. The specific capacitance measured from cyclic voltammetry is 1350 F/g for TSA-PANI/PNR composite material and 1038 F/g for TSA/PANI at 1 mV/s scan rate; the initial specific capacitance of the TSA-PANI/PNR supercapacitor is about 348 F/g at a constant current of 5 mA. Meanwhile, the retention of the capacitance after 1000 charge-discharge cycles was 87%.

Key words: Polyaniline; Poly(neutral red); Copolymerization; Paratoluenesulfonic acid; Emulsion polymerization; Supercapacitor

TrendMD:

徐海丽, 曹琪, 王先友, 陈权启, 廖丽. 对甲苯磺酸掺杂聚(苯胺/中性红)复合物的乳液聚合法制备及电化学电容行为. 高等学校化学学报, 2010, 31(3): 571.

XU Hai-Li, CAO Qi*, WANG Xian-You, CHEN Quan-Qi, LIAO Li. Preparation and Capacitive Performance of TSA-PANI/PNR Composites by Emulsion Polymerization. Chem. J. Chinese Universities, 2010, 31(3): 571.

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