环境对自呼吸式MEMS微型H_2/空气质子交换膜燃料电池的影响  

Effect of ambient conditions on the air-breathing MEMS H_2/Air micro PEM fuel cells

作　　者：郑丹[1,2] 张熙贵[2] 张鲲[2] 姜伟[2] 夏保佳[2] 

机构地区：[1]上海应用技术学院化学工程系,上海200233 [2]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《功能材料与器件学报》2009年第5期497-502,共6页Journal of Functional Materials and Devices

基　　金：国家自然科学基金项目(No.60936003);上海应用技术学院基金项目(No.KJ2009-08)资助

摘　　要：利用MEMS技术制备了一种自呼吸式微质子交换膜燃料电池(PEMFC),阳极采用点蛇混合结构,阴极采用双层镂空微流场结构,阴极靠近膜电极侧微孔尺寸从5～50m不等。鉴于自呼吸式电池的性能受环境的影响很大,本文着重研究了环境湿度和温度对电池性能的影响。结果表明阴极微孔尺寸为11m和15m的电池孔径适度,在环境20℃、30%-70%RH时两电池的极限电流密度(Jmax)和峰值功率密度(Pmax)均表现出较高值,性能良好;阴极微孔尺寸为11m的电池在空气维持50%RH下,温度由10℃升到40℃时Pmax逐渐增大,增幅达14.9%;若不维持空气湿度而改变温度,则温度由10℃升高到40℃时Pmax先增大后减小,20℃时达最大。A PEMFC was designed and fabricated with the microelectromechanical system （MEMS） technology. The anode has a pin - serpentine - combined flew field and the cathode has two layers with small channels flew field for air - breathing. The pore size of small channels near the MEA ranges from 5 m to 50 m. This paper focuses on the effects of relative humidity and temperature on fuel cell performance. Results show that PEMFCs with 11 m and 15 m micro - pore in cathodes performs well at 20℃ and 30 - 70% RH. When air humidity is controlled at 50% RH, the peak power （Pmax） of PEMFC with 11 m micro - pore in cathode went up by 14.9% when temperature rose from 10℃ to 40℃. In contrast, when doing the same thing without air humidity control, Pmax first increased to the maximum at 20℃ and then decreased.

关 键 词：微型质子交换膜燃料电池 自呼吸阴极 自然对流 MEMS技术 

分 类 号：TN305[电子电信—物理电子学]