PTFE/Nafion/Pt-SiO2 複合膜製備及燃料電池性能研究

TFE/Nafion/Pt-SiO2 composite membrane farbrication and fuel cells performances studies

張育豪(Yu-Hao Chang)

指導教授 ： 余子隆

元智大學/工程學院/化學工程與材料科學學系/碩士(2012年)

摘要

PTFE/Nafion複合膜具有高機械強度，膜薄，等特性。但PTFE/Nafion複合膜應用於燃料電池在低溼度環境下操作，因膜缺水質子傳導及電池性能低，利用SiO2的吸濕能力，及Pt可將滲透入膜內的H2與O2成為催化反應生成H2O，以提高膜的含濕能力與燃料電池性能。我們使用SEM（Scanning Electron Microscope）觀察膜結構，交流阻抗儀（AC impedance）測定膜材質子傳導阻抗，並將PTFE/Nafion及PTFE/Nafion/Pt-SiO2複合膜製作膜電極組（MEA），測試其單電池在不同溫度(80℃及95℃)及不同溼度(100% RH、10% RH及16% RH)下的性能。在95℃下，低溼度的環境下，PTFE/Nafion/Pt-SiO2複合膜的燃料電池性能比PTFE/Nafion複合膜高。Pt-SiO¬2使質子交換膜在低濕環境下含有較高的水分使膜電極組性能提升。

關鍵字

全氟磺酸樹脂 ； Pt-SiO¬ ； 2 ； 質子交換膜燃料電池 ； 膜電極組

並列摘要

PTFE/Nafion/Pt-SiO2 composite membranes were prepared by spray of Pt-SiO2 on PTFE/Nafion composite membranes. The surface of the composite membrane was investigated using SEM, AC impedance was used to measure the conductivity, thermo gravimetric analysis（TGA）to characterize the water uptake. PTFE/Nafion and PTFE/Nafion-Pt-SiO2 composite membranes were used to prepare membrane electrode assembly (MEA). The proton exchange membrane fuel cell (PEMFC) performances and electrochemical properties of these MEAs were investigated under different temperatures and different relative humidity concentrations.

並列關鍵字

Nafion ； Pt-SiO¬ ； 2 ； Proton exchange membrane fuel cell (PEMFC) ； membrane electrode assembly (MEA)

參考文獻

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