Local measurements of hydrogen crossover rate in polymer electrolyte membrane fuel cells

被引：43

作者：

Baik, Kyung Don ^{[1
]}

Kong, Im Mo ^{[1
]}

Hong, Bo Ki ^{[2
]}

Kim, Sae Hoon ^{[2
]}

Kim, Min Soo ^{[1
]}

机构：

[1] Seoul Natl Univ, Sch Mech & Aerosp Engn, Seoul 151744, South Korea

[2] Hyundai Kia Motors, Ecotechnol Ctr, Fuel Cell Vehicle Team 1, Gyeonggi Do 446912, South Korea

来源：

APPLIED ENERGY | 2013年 / 101卷

关键词：

Hydrogen crossover; Local measurement; Polymer electrolyte membrane fuel cell; Open circuit voltage; OPEN-CIRCUIT VOLTAGE; GAS CROSSOVER; DIFFUSION; WATER;

D O I：

10.1016/j.apenergy.2012.06.034

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Hydrogen crossover is the main reason for membrane degradation in polymer electrolyte membrane fuel cells (PEMFCs). In this study, local measurements of the hydrogen crossover rate at the cathode in a PEMFC are investigated to analyze the distribution of hydrogen crossover rates under various temperature and relative humidity (RH) conditions. The bipolar plate for the cathode side is specially designed for local measurements. Results show that hydrogen crossover appears to occur mostly near the gas inlet region, and reduced crossover amounts near the outlet region. The hydrogen crossover rates increase with decreasing the nitrogen flow rates at a given section. The effects of temperature and RH on the hydrogen crossover rate over the entire area of the fuel cell are also analyzed and compared with the results of the open circuit voltage (OCV). The results show that the hydrogen crossover rate increases with the increase in both cell temperature and RH, resulting in a decrease in the OCV. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：560 / 566

页数：7

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