阳极闭口模式下质子交换膜燃料电池氮气渗透  

Nitrogen permeation in proton exchange membrane fuel cells under anode dead-end mode

作　　者：李子君 王建国 王树博[3] 李微微[3] 谢晓峰[3,4] LI Zijun;WANG Jianguo;WANG Shubo;LI Weiwei;XIE Xiaofeng(School of Naval Architecture and Maritime,Zhejiang Ocean University,Zhoushan 316022,China;SANY Heavy Industry Co.Ltd.,Changsha 430100,China;Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China;China Institute of Ocean Engineering(TsingTao),Qingdao 266555,China)

机构地区：[1]浙江海洋大学船舶与海运学院,浙江舟山316022 [2]三一重工股份有限公司,湖南长沙430100 [3]清华大学核能与新能源技术研究院,北京100084 [4]中国海洋工程研究院(青岛),山东青岛266555

出　　处：《高校化学工程学报》2024年第1期61-69,共9页Journal of Chemical Engineering of Chinese Universities

基　　金：崂山实验室科技创新项目(LSKJ202204503)。

摘　　要：质子交换膜燃料电池(PEMFC)阳极闭口模式潜力巨大,但该模式下运行会引发氮气从阴极向阳极的渗透,导致阳极氢气的摩尔分数降低,PEMFC性能下降,针对这种情况可通过吹扫恢复PEMFC的性能。搭建了阳极闭口模式测试系统,在不同操作条件下进行阳极闭口模式实验,同时建立数学模型研究不同电流密度、化学计量比和温度下,电压和阳极氢气的下降速率以及传输到阳极的氮气积累量,提出实验与仿真结合的方法深入探究闭口模式下气体的传输规律,结果表明:当氢气摩尔分数为0.75时,电压下降到1.4 V,此时性能明显下降,提出相应吹扫策略:氢气摩尔分数在0.8时吹扫最为有效。The anode dead-end mode of Proton Exchange Membrane Fuel Cells(PEMFCs)holds significant potential.However,operating under this mode can lead to nitrogen permeation from cathode to anode,which results in anode hydrogen concentration and PEMFC performance decrease.The PEMFC performance can be restored through purging.In this study,a testing system for the anode dead-end mode was constructed,and experiments were performed under different operating conditions.Additionally,a mathematical model was developed to study the rate of voltage decrease and the accumulation of nitrogen transported to the anode under different current densities,stoichiometric ratios,and temperatures.An approach combining experiments and simulations was proposed to investigate the transport patterns of gases in the dead-end mode.The results indicate that when the hydrogen molar fraction is 0.75,the voltage decreases to 1.4 V,and performance deteriorates significantly.A corresponding purging strategy was suggested and the results indicate that purging is most effective when the hydrogen molar fraction is 0.8.

关 键 词：质子交换膜燃料电池 阳极闭口 氮气渗透 数值模拟 

分 类 号：TQ465.92[化学工程—制药化工]