Title page for etd-0019116-145337


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URN etd-0019116-145337
Author Ling-Ching Hung
Author's Email Address No Public.
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Department Mechanical and Electro-Mechanical Engineering
Year 2015
Semester 1
Degree Master
Type of Document
Language English
Title Performance Analysis for Micro Direct Methanol Fuel Cell through Electrochemical Impedance Spectroscopy and Cyclic Voltammetry
Date of Defense 2016-01-13
Page Count 239
Keyword
  • planar
  • μDMFC/μDMFC stack
  • air-breathing
  • cell/stack performance
  • EIS
  • CV
  • Abstract This study, analyzes the performances of air-breathing micro direct methanol fuel cell and planar stacks, and discusses the performance differences under different stack numbers. The experiments used V-I curve and P-I curve to analysis the maximum power density and limiting current density with different operating parameters. Moreover, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) methods were also adapted to measure the corresponding impedance spectroscopy and difference of electrochemically active area of Pt catalyst. The results show that the impedance has a minimum value and the power density has a maximum value of 34.39 mW/cm2 under an optimum working condition (T=60 oC, QMeOH=3sccm and C=1M), the resistance of fuel cell stack increases as the stack number increases; electrochemically active area of catalyst will not change with stack number. It can prove the method of stacking fuel cells in this study is feasible. Besides, we can focus on reducing the loss in fuel cell in the future. We hope that the fuel cell design can be improved through this method, and put fuel cell into practical application of the portable electronic device.
    Advisory Committee
  • C. J. Ho - chair
  • Chao-Kuang Chen - co-chair
  • Shou-Shing Hsieh - advisor
  • Files
  • etd-0019116-145337.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2016-01-19

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