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  

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

作　　者：徐海丽[1] 曹琪[1] 王先友[1] 陈权启[1] 廖丽[1] 

机构地区：[1]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

出　　处：《高等学校化学学报》2010年第3期571-576,共6页Chemical Journal of Chinese Universities

基　　金：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：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/LH2SO4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%.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%.

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 

分 类 号：O646[理学—物理化学]