PEMFC可视化单电池的性能差异研究  

Research on performance differences of PEMFCs using visualization techniques

作　　者：王晨[1] 胡鸣若[1] 阮慎锐[1] 曹广益[1] 

机构地区：[1]上海交通大学燃料电池研究所绿色电化学系统和结构实验室,上海200240

出　　处：《电源技术》2015年第3期479-483,共5页Chinese Journal of Power Sources

基　　金：国家自然科学基金(51006070)

摘　　要：在一定的工作条件下,研究了常规单电池、阴极侧采用透明结构的单电池、阳极侧采用透明结构的单电池、阴阳极侧都采用透明结构的单电池的I-V性能和电化学阻抗谱;在此基础上,进一步研究了这四种单电池在不同湿度下的性能和阻抗的差异。结果表明,三种透明的可视化单电池的性能都低于常规单电池的性能且阻抗大于后者,阴极侧采用透明结构的单电池性能优于阳极侧采用透明结构单电池的性能,而阴阳极侧都采用透明结构单电池的性能最差,其原因可能是透明电池的石墨镂空板增加了电子传递的路径,从而增加了电阻,此外,由于透明电池的聚碳酸酯端板和石墨镂空板在电池装配时会发生变形,大大增加了石墨镂空板与气体扩散层的接触电阻。Performance differences among a single cell with a transparent structure in the cathode side, a single cell with a transparent structure in the anode side and a single cell with transparent structures in both the cathode and the anode sides and a traditional single cell were compared under a constant operating condition by testing the polarization curve and EIS. The polarization curve and EIS of these four single cells were further tested and compared under different humilities. The results show that the performance of the traditional single cell is better than the other three transparent single cells and has smaller impedance. The performance of the single cell with a transparent structure in the cathode side was better than that of the single cell with a transparent structure in the anode side. The single cell with transparent structures in both the cathode and the anode sides shows the poorest performances. The reasons might be that the engraved graphite plate in the transparent structure increases the transport distance for the electron then increases the resistance. More important, the contact resistance between an engraved graphite plate and an gas diffusion layer were assembly increased by the distortions of both polycarbonate end plate and engraved graphite plate which caused by fuel cell.

关 键 词：质子交换膜燃料电池 可视化 透明电池 相对湿度 电化学阻抗谱 

分 类 号：TM911[电气工程—电力电子与电力传动]