PAn/DMcT复合膜电极的电化学性能  

Electrochemical Properties of PAn/DMcT Compound Film Cathode

作　　者：邓凌峰[1] 李新海[1] 肖立新[1] 张云河[1] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083

出　　处：《材料导报》2004年第1期88-91,共4页Materials Reports

基　　金：教育部留学回国人员科研启动基金

摘　　要：PAn/DMcT复合膜电极的氧化还原峰电位差和电化学阻抗比DMcT的小得多,这表明PAn对DMcT具有电催化性能,使DMcT的氧化还原反应速度大大提高。而且DMcT使几乎所有的PAn都能保持电化学活性,复合膜电极的CV曲线经过100次循环几乎没有变化。PAn/DMcT复合膜电极的首次充放电比容量分别为275mAh·g^(-1)和200mAh·g^(-1),首次充放电效率为72.7%。和粉末混合法制备的复合膜相比,溶液法制备的PAn/DMcT复合膜电极具有较高的放电比容量和优良的循环稳定性。Redox peak-potential difference and charge-transfer resistance in PAn/DMcT compound film cathode is much less than those in DMcT film cathode, indicating that PAn has a strong electrochemical catalysis effect on the reaction of DMcT so that the reaction rate of DMcT can be accelerated greatly by PAn, and with DMcT all PAn can remain electrochemically active. Therefore, its cyclic voltammogram is almost unchanged after 100 circles. Initial charge/discharge capacity of PAn/DMcT compound film electrode is 275 mAh ? g^(-1) and 200 mAh ? g^(-1). and initial charge/discharge efficiency is 72. 7%. Compared with mixed-powder cathode, mixed-solution film cathode possesses larger discharge capacity and excellent cycle stability.

关 键 词：电化学性能 PAn/DMcT复合膜电极 粉末混合法 溶液法 循环稳定性 电池 

分 类 号：TM910.3[电气工程—电力电子与电力传动] O646[理学—物理化学]