Nafion基氧化还原聚合物在空气中的电荷传输性能  

Charge Transport Performance of Nafion-based Redox Polymer in Atmosphere

作　　者：陈红香[1] 周剑章[1] 席燕燕[1] 蓝碧波[1] 冯增芳[1] 姚光华[1] 林仲华[1] 

机构地区：[1]厦门大学化学系厦门大学固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《物理化学学报》2007年第3期404-408,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20373057)资助项目

摘　　要：利用三明治电池和伏安法测试了不同制备条件的Nafion基氧化还原聚合物膜在空气中的电荷传输性能.研究结果表明,混合适量聚乙二醇(PEG)的Nafion基金属联吡啶配合物｛Nafion[M(bpy)23+,PEG](M=Ru,Fe)｝膜的表观电荷传递扩散系数(Dct)达到10-6-10-7cm2·s-1,电子或空穴迁移率(μ)达到10-4-10-5cm2·V-1·s-1.在导电玻璃(ITO)电极与Nafion基氧化还原聚合物膜界面引入一层导电聚苯胺(PANI)后,降低了其接触电阻,使氧化还原聚合物膜的Dct提高至10-5-10-6cm2·s-1,μ提高至10-3-10-4cm2·V-1·s-1,且工作电流提高了近两个数量级.该固态氧化还原聚合物膜的性能比较稳定,在空气中放置30天后其Dct和μ降低得很少.The charge transport performance of the Nation-based redox polymer films prepared under different conditions was investigated by cyclic voltammetry in the sandwiched cells. The results showed that the apparent charge transfer diffusion coefficient（Dct） of the Nafion[M（bpy）3^2＋, PEG （polyethylene glycol）] （M=Ru or Fe） films is about 10^-6-10^-7 cm^2·s^-1 and the mobility of the electron or hole （μ） was about 10^-4-10^-5 cm^2·V^-1·s^-1. In order to decrease the resistance of the interface, a polyaniline （PANI） layer was added to the interface of indium tin oxide coated conducting glass （ITO） electrode and the redox polymer. Consequentially, the Dct could be increased to about 10^-5-10^-6 cm^2·s^-1 and μ to about 10^-3-10^-4 cm^2·V^-1·s^-1, and the operating current of the cells under 600 mV bias could be increased by almost 100 times. In addition, the Dct and μ of this redox polymer film had just reduced slightly after 30 d kept in atmosphere. Therefore, the redox polymer film is sufficiently stable.

关 键 词：全氟磺酸质子交换树脂 氧化还原聚合物 有机电荷传输材料 电荷传递扩散系数 

分 类 号：O631.3[理学—高分子化学]