燃料电池因其具有效率高、操作温度低、功率密度高并且启动速度快等优点,使其成为在移动和静置电源中很有前途的零排放动力源;双极板是燃料电池的关键部件之一,不但影响电池的性能,也是影响电池制作成本的关键因素;而高成本正是影响燃料电池走向实用化的一大障碍。针对如何降低燃料电池的生产成本,减少电池堆的重量和体积及将流道设计最佳化的问题,综述了双极板的具体材料,并对这些材料的特点进行了分析;同时,论述了双极板的流场形式,在此基础上对其不同流场形式的优缺点进行了比较,并对一些改进流场和新型流场做了介绍,这将对燃料电池的研究设计工作提供一定的参考。
The fuel cells are a promising candidate as a zero-emission power source for transport and stationary concentration applications due to its high efficiency,low-temperature operation,high power density and fast start-up.Bipolar plate is the vital component of fuel cells,which not only influents the performance of fuel cells,but also affect the cost of fuel cells.However,high cost is one of the biggest obstade to validate fuel cell technology.Aiming at how to reduce the cost of production,weight and volume of the fuel cell stack and design optimal flow channel,materials of bipolar plate were reviewed,and the features of materials were analyzed.Meanwhile,flow-field forms of bipolar plate were discussed and their advantages and disadvantages were also compared.In addition,some modified and new-type flow fields were also introduced,which provided a reference for research and design of the fuel cells.