Design, fabrication and characterization of micro-electro mechanical system based micro direct methanol fuel cell stacks

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• 作者：Shou-Shing Hsieh ; ^{sshsieh@faculty.nsysu.edu.tw}Author Vitae ; Ho-Chieh WuAuthor Vitae ; Bing-Shyan HerAuthor Vitae
• 关键词：¦ÌDMFC stack ; Series connections ; Power density
• 刊名：Sensors and Actuators A: Physical
• 出版年：2012
• 出版时间：November, 2012
• 年：2012
• 卷：187
• 期：Complete
• 页码：57-66
• 全文大小：2927 K

文摘

We propose a novel design, fabrication and testing for a micro direct methanol fuel cell (¦ÌDMFC) stack. Eight ¦ÌDMFCs are fabricated on a copper metal sheet substrates via a LIGA-like microfabrication process of deep UV lithography, and integrate in series for an examination of the effect of the operating parameters of the stack temperatures (T) of 25¡ã, 40¡ã and 60 ¡ãC, as well as the methanol feeding rates (Q_MeOH) of 4, 8, 16, and 32 ml/min, and methanol concentration (C) of 0.5, 1, and 2 M through both steady VI/PI measurements and transient (dynamic) electrochemical impedance spectroscopy examination (EIS). With 8 cells in series on the substrate, we achieve an open circuit voltage (OCV) of 4.5 V and a maximum power density of 27.5 mW/cm² (@ 2.0 V) under a specific working condition (T = 60 ¡ãC, Q_MeOH = 16 ml/min, C = 1 M).