直接甲醇燃料电池的单电池实验测试及性能优化_魏永生

文章编号:1673-0291(2010)06-0090-05

直接甲醇燃料电池的单电池实验测试及性能优化

魏永生1,朱 红2,郭玉宝1,郭志军1,张新卫1

(1.北京交通大学理学院,北京100044;2.北京化工大学理学院,北京100029)

摘 要:以新型阻醇材料Na 2Ti 3O 7/Nafion 复合膜为质子交换膜,利用热压法制备膜电极(M EA),对直接甲醇单电池进行测试.考察了电池温度、阴极加湿温度、甲醇浓度、甲醇流速和空气流速5个

参数对直接甲醇燃料电池极化曲线性能的影响.实验结果表明,电池温度对电池性能的影响较为明显,提高电池温度有利于得到较好的电池性能.甲醇浓度对电池性能影响也比较明显,较低甲醇浓度有利于提高电池性能.甲醇流速和空气流速对电池性能的影响较小,阴极加湿温度对电池性能几乎没有影响.通过分析优化,该直接甲醇燃料电池的电池性能最佳工作条件是在80 情况下,低电流密度工作区采用较低浓度甲醇溶液,高电流密度工作区采用高浓度甲醇溶液.关键词:直接甲醇燃料电池;质子交换膜;Na 2Ti 3O 7/Nafion;极化曲线中图分类号:TK91 文献标志码:A

Experimental Test and Performance Optimization of Single Cell

in Direct Methanol Fuel Cell

WEI Yongsheng 1

,ZH U H ong 2

,G UO Yubao 1

,G UO Zhijun 1

,ZH AN G X inw ei

1

(1.School of Science,Beijing Jiaotong U niversity,Beijing 100044,China;

2.School of Science,Beijing U niversity of Chemical T echno logy,Beijing 100029,China)

Abstract :With new com posite membrane materials of Na 2Ti 3O 7/Nafion for proton ex chang e mem -brane,Membrane Electrode Assembly (MEA)was prepared using hot -pressing method,and had been tested in single direct methanol fuel cell.Operation parameters of cell temperature,cathode humidify -ing temperature,methanol concentration,methanol flow rate and air flow rate have been em ployed to study on the effect of direct methanol fuel cells polarization curve.Experimental results show that the effect of cell tem perature on the cell performance is obvious,so increase cell temperature is helpful to g et better cell performance.Effect of methanol concentrations on cell performance is also obvious.The low er methanol concentration is favorable to improve cell properties.The effect of m ethanol flow rate and air flow rate to the cell performance is lesser.Effect of cathode humidification temperature on cell performance almost has no effect.T hrough the analysis and optimization,the better operation cond-i

tions of direct methanol fuel cells is in cell temperature of 80 ,and the low concentration of methanol w hen the cell w orks in low current density,or high concentrations of methanol w hen the cell works in high current density.

Key words:direct methanol fuel cell;proton ex change membrane;Na 2T i 3O 7/Nafion;polarization curve

收稿日期:2010-12-01

基金项目:国家自然科学基金重点资助项目(20636060);国家自然科学基金资助项目(50674006,20876013);国际合作项目(2006DFA61240,2009DFA63120)

作者简介:魏永生(1984 ),男,江苏徐州人,博士生.email:06118340@.

朱红(1957 ),女,安徽合肥人,教授,博士,博士生导师.

第34卷第6期

2010年12月

北 京 交 通 大 学 学 报

JOU RN AL O F BEIJIN G JIAOT O NG U N IV ERSI T Y

V ol.34N o.6Dec.2010