由於呼吸式質子交換膜燃料電池的系統架構較為簡單，因此在千瓦級的發電系統領域中有極大的發展潛力。呼吸式質子交換膜燃料電池陰極燃料為大氣中的空氣，因此外界的氣流環境對於呼吸式質子交換膜燃料電池組有絕對性的影響。本論文嘗試設計五級平板陣列型呼吸式燃料電池組，放置於循環式風洞中，以改變其外在氣流環境及電池操作溫度進行實驗，並使用極化曲線及交流阻抗分析技術進行分析。
在本研究中發現，多數情況下呼吸式質子交換膜燃料電池於強制對流下的性能優於自然對流下的性能。當改變電池陰極面攻角及電池操作溫度時，會改變陰極表面的水分蒸散速率，進而改變膜電極組的水平衡狀態。從交流阻抗分析而言，在不同風速下，呼吸式質子交換膜燃料電池於陰極面攻角為90°時的阻抗頻譜整體變化小於陰極面攻角為0°時的變化。本研究之五級平板陣列型呼吸式燃料電池組於2.0V時，最大功率密度可達1286mW/cm2。

Because of the simple system construction, air-breathing PEMFCs have a great potential in the field of kilowatt power generation. Air-breathing PEMFCs use air in atmosphere as the cathodic fuel, so the characteristic of external environment has an absolute influence on air-breathing PEMFCs.
In this study, a 5-cell array planar air-breathing PEMFC stack was made and placed into a closed-circuit wind tunnel. By changing cathode-side angle of attack, stack operation temperature and ambient flow speed, it will be discussed that the influences of ambient flow field of cathode and stack operation temperature to the performance of air-breathing PEMFC stack respectively by fuel cell polarization and electrical impedance spectroscopy.
Experimental results showed that in the most case the stack performance in the forced convection on was better than the stack performance in the free convection. When changing angle of attack on the cathode-side and the stack operation temperature, it could change the water evaporation rate on the cathodic GDL, and thereby changing the water balance of the MEAs. The difference of the impedance spectrum at 90°angle of attack on cathode-side was smaller than the difference of the impedance spectrum at 0°angle of attack under different wind velocity by electrical impedance analysis. The 5-cell array planar air-breathing PEMFC stack could reach the maximum power density, 1286mW/cm2 at 2V in the research.

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