论文部分内容阅读
<正>Direct alcohol fuel cells（DAFCs） are expected to be promising power sources ranging from automotive to portable electronic device applications due to their high power density and low environmental pollution.Several merits for alkaline direct alcohol fuel cells（ADAFCs） have been suggested:potential to forego noble metal catalysts;lower fuel permeability;lower overpotentials associated with many electrochemical reactions at high pH;less serious corrosion in alkaline environment; and a significant change in water management.There has been a growing interest in the development of alkaline anion-exchange membranes（AAEMs）,which served dual functions of hydroxide ion conducting and fuels separating,and,as a result,seriously affected the performance of ADAFCs.Plasma grafting as mild and efficient method for introducting functional groups onto the polymer matrix is employed to prepare AAEMs in this study.The ATR-FTIR,XPS and TGA demonstrate that the benzyltrimethylammonium cationic groups are successfully introduced into the PVC matrix via plasma grafting,quaternization and alkalization.The plasma-grafted AAEM exhibits a satisfactory ionic exchange capacity(1.01 mmol g-1),thermal stability, mechanical property,ionic conductivity(0.0145 S cm-1) and methanol permeability (9.59×l0-12 m2 s-1).The open circuit voltage of air-breathing ADAFC using plasma-grafted alkaline anion-exchange membrane is 0.796 V with 1 M EtOH solution at ambient temperature.This performance criterion expects that such kind of plasma-grafted AAEMs have great potential for application in alkaline directly alcohol fuel cells.