关键词: 燃料电池, 质子交换膜, 电渗拖曳系数, 测量, 复合膜

Abstract: Electro-osmotic drag of proton exchange membrane is important in fuel cells because it directly affects water management and the complexity of fuel cell system. The electro-osmotic drag coefficient is the number of water molecules transported per proton. Measurement methods of electro-osmosis drag coefficient of proton exchange membranes are reviewed and their advantages and disadvantages are pointed out in this paper. The electro-osmotic drag coefficient of membrane contacting liquid water could be measured by electro-osmotic drag cell，hydrogen pump and electrophoretic nuclear magnetic resonance，while the electro-osmotic drag coefficient of membrane contacting gaseous water could be measured by the activity gradient method and electrophoretic nuclear magnetic resonance. With the development of composite proton exchange membrane，universal methods are urgently needed to acquire the electro-osmotic drag coefficient of compsite membrane with the purpose of providing parameters for the accurate description of the proton exchange membrane in fuel cells models.

Key words: fuel cells, proton exchange membrane, electro-osmotic drag coefficient, measurement, composite membrane