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URN etd-0123113-114525 Statistics This thesis had been viewed 2349 times. Download 1021 times. Author Ming-Tung Sung Author's Email Address No Public. Department Mechanical Engineering Year 2012 Semester 1 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 61 Title Preparation of cathode catalyst layer with composite of electrospun Pt nanofibers and Pt/C on the performance of a PEMFC Keyword Nafion content Catalyst layer proton exchange membrane fuel cell Electrospinning method Pt nanofiber Pt nanofiber Electrospinning method proton exchange membrane fuel cell Catalyst layer Nafion content Abstract In this study, the electrospinning method was used to fabricate the catalyst layer for a proton exchange membrane fuel cell (PEMFC). The corresponding membrane electrode assembly (MEA) was also made by hot press and the fuel cell performance has been tested. The electrospun nanofibers were produced by electrospun solution made of PVP polymer mixed with Pt precursor (H2PtCl6) to be catalyst layers. Besides, the cathode catalyst layer was fabricated by different mixing ratio of Pt/C and Pt nanofibers and the performance was tested. The Pt nanofibers are sprayed on carbon cloth and then hot-pressed together with Nafion 117 membrane to form the MEA. The different Pt loading with composite of Pt/C and Pt nanofibers and Nafion contents were mixed to produce cathode catalyst layer. Then, analyzing the best parameters of catalyst layer and performance of fuel cell.
The results indicated that cathode catalyst layers fabricated only by Pt nanofibers couldn’t enhance the performance of fuel cell, but the traditional Pt/C mixed with fitting ratio of Pt nanofibers could enhance the performance effectively. Results showed that the performance is fine, when loading ratio of Pt is 1:4 in the mixture of Pt nanofibers and Pt/C. Then finding out the best Nafion content with the mixing ratio of Pt, the fuel cell have the best performance with 30% content of Nafion.
Advisor Committee Ming-Hsing Chang - advisor
Ming-Hua Ho - co-chair
Yung-Yu Chen - co-chair
Files Date of Defense 2013-01-15 Date of Submission 2013-01-23