自呼吸式硅微机械氢燃料电池的阳极流场优化  

Optimized of Anode Flow Field for High-Performance Air-Breathing Si-Micromachining H_2/Air Fuel Cells

作　　者：郑丹[1] 倪卫其[2] 姜伟[3] 张熙贵[3] 张鲲[3] 夏保佳[3] 

机构地区：[1]上海应用技术学院化学工程系,上海200235 [2]上海水产大学,上海200090 [3]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《半导体技术》2007年第9期816-819,共4页Semiconductor Technology

基　　金：上海市重点学科建设资助项目(p1501)

摘　　要：利用硅微机电系统(MEMS)技术,设计并制作了点状、蛇形和点蛇混合三种微型氢/空气质子交换膜燃料电池(μPEMFC)阳极流场板,测定了三种不同阳极结构电池的极化和功率密度曲线、交流阻抗图及燃料利用率。结果表明,采用混合流场能有效协调燃料利用和电池接触电阻的矛盾,其极限功率密度比点状和蛇形流场分别提高了12.8%和45.7%;在100～500 mA恒电流放电下,采用混合流场比点状和蛇形流场可节省燃料平均达14.3%和25.1%。Three types of anode structures, pin-type, serpentine-type and pin-serpentine mixed type, for air-breathing micro H2/air proton exchange membrane fuel cell were designed and fabricated using silicon micro-electromechanical system （ MEMS ） technology. Polarization curves, power density curves, electrochemical impedance spectra （EIS） plots and H2 utilization percent of/IPEMFCs using different anode field plates were measured. The results indicate that the use of the mixed type field plate can efficiently conciliate the conflict between fuel utilization percent and contact resistance, and leading to an increment of the peak power density by 12.8% and 45.7% and a fuel saving by average 14.3% and 25,1% at discharging current of 100 - 500 mA in comparison of that of pin-type and serpentine-type field plate.

关 键 词：微型质子交换膜燃料电池 硅微机械 阳极流场 燃料利用率 MEMS技术 

分 类 号：TN405[电子电信—微电子学与固体电子学]