anti-flooding of polymer electrolyte membrane fuel cell with in-plate adverse-flow flow-field
来源期刊：中南大学学报(英文版)2013年第4期
论文作者：LI Peng-cheng(李鹏程) PEI Pu-cheng(裴普成) HE Yong-ling(何勇灵) ZHANG Hong-fei(张红飞)
文章页码：1001 - 1009
Key words：proton exchange membrane fuel cell; in-plate adverse-flow flow-field; stoichiometry; anti-flooding
Abstract: The stoichiometric ratios and related regimes, which can promote anti-flooding of polymer electrolyte membrane fuel cell (PEMFC) with in-plate adverse-flow flow-field (IPAF), were investigated. Two flow combinations, which are the simple and complex adverse-flow between plates (ABP) that can be realized by IPAF, were employed. Constant stoichiometric ratios examination indicates that the complex ABP could improve anti-flooding of PEMFC better in the medium (greater than 200 mA/cm2 and less than 1 000 mA/cm2) and high (greater than 1 000 mA/cm2) current densities than the simple ABP. More stoichiometric ratios were introduced to find the cathode critical stoichiometry. Under the condition of cathode critical stoichiometry, the maximal local relative humidity of both electrodes of complex ABP is equal to 100% and below while the anti-flooding of the cathode of simple ABP is not satisfactory in the medium and high current densities. Further study shows that the mechanism of fuel cell, which is the interdependence between the electrodes effect, can make significant contribution to anti-flooding.
LI Peng-cheng(李鹏程)1, PEI Pu-cheng(裴普成)2, HE Yong-ling(何勇灵)1, ZHANG Hong-fei(张红飞)2
(1. School of Transportation Science and Engineering, Beihang University, Beijing 100191, China;
2. State Key Laboratory of Automotive Safety and Energy (Tsinghua University), Beijing 100084, China)
Abstract:The stoichiometric ratios and related regimes, which can promote anti-flooding of polymer electrolyte membrane fuel cell (PEMFC) with in-plate adverse-flow flow-field (IPAF), were investigated. Two flow combinations, which are the simple and complex adverse-flow between plates (ABP) that can be realized by IPAF, were employed. Constant stoichiometric ratios examination indicates that the complex ABP could improve anti-flooding of PEMFC better in the medium (greater than 200 mA/cm2 and less than 1 000 mA/cm2) and high (greater than 1 000 mA/cm2) current densities than the simple ABP. More stoichiometric ratios were introduced to find the cathode critical stoichiometry. Under the condition of cathode critical stoichiometry, the maximal local relative humidity of both electrodes of complex ABP is equal to 100% and below while the anti-flooding of the cathode of simple ABP is not satisfactory in the medium and high current densities. Further study shows that the mechanism of fuel cell, which is the interdependence between the electrodes effect, can make significant contribution to anti-flooding.
Key words:proton exchange membrane fuel cell; in-plate adverse-flow flow-field; stoichiometry; anti-flooding
