Pt-C/PBI/PVDF/DMAc觸媒溶液應用於PBI高溫燃料電池膜電極組製作

本論文研究於聚苯並咪唑(PBI)、N,N’-二甲基乙醯胺(DMAc)及Pt-C/PBI之觸媒漿料中添加不同比例PVDF作為調整參數之觸媒溶液，並評估其應用於高溫質子交換膜燃料電池的影響。首先利用超音波噴塗觸媒漿料於碳紙上以製備不同PVDF含量之電極，並經由循環伏安法(CyclicVoltammetry)實驗測試電極觸媒活性，此外，製備陽極不含PVDF而陰極觸媒漿料中添加不同[PVDF/PBI+Pt-C]重量比之膜電極組並進行單電池測試，陰陽極 Pt loading分別為 0.5mg/cm2，陰陽極進料氣體分別是氧氣與氫氣，操作溫度160℃，且連續放電48小時後，比較單電池測試之i-V曲線。 CV實驗結果顯示，隨著PVDF添加量提高，導致Pt被覆蓋因而降低Pt活性表面積。單電池測試結果顯示，陰極[PVDF/PBI+Pt-C]重量比為0.01時，單電池起始性能與未添加PVDF之電極其效能相近，但其i-V曲線(0.3V) 隨時間之衰退幅度低於未添加PVDF之電極；陰極[PVDF/PBI+Pt-C]重量比高於0.03時，單電池起始性能低於未添加PVDF電極之效能，而且其i-V曲線(0.3V) 隨時間之衰退幅度較未添加PVDF顯著。

關鍵字

聚苯並咪唑；聚氟化亞乙烯；質子交換膜燃料電池

並列摘要

This study focuses on the characterization of anode with various PVDF for PBI-based high temperature proton exchange membrane fuel cell. The anode catalyst ink, a solution which comprised PBI, Pt/C, and DMAC, then incorporated with different amounts of PVDF as the solution media. The MEAs, anode without PVDF and cathode with different amounts of PVDF, were prepared. The electrochemical surface area (ECSA) of electrode was measured by using cyclic voltammeter (CV). The voltage-current density curves of MEA were measured at 160℃for 48 hours, using hydrogen / oxygen as inlet gases. For CV test, the results reveal that the increases of PVDF amount led to the reduction of ECSA of Pt in electrode. For PEMFC test, the MEA, consisting of [PVDF/PBI+Pt-C] wt ratio of 0.01 in cathode, had a similar fuel cell performance, but a lower decay after 48 hrs as compared with that MEA without PVDF in cathode. The MEAs, consisting of [PVDF/PBI+Pt-C] wt ratio greater than 0.03 in cathode, had an inferior fuel cell performance and a significant decay after 48 hrs as compared with that MEA without PVDF in cathode.

並列關鍵字

PBI ； PVDF ； PEMFC

參考文獻

 曹至皓，” 高溫型質子交換膜燃料電池之電極最佳化結構之發展及特性之研究”，碩士論文，元智大學，(2011)。

 黃朝榮，“燃料電池-原理與應用”，五南圖書(2003) 。

 E. Dilek, D. Yilser, B. Nurcan, E. Inci,’’ Phosphoric Acid Doped Polybenzimidazole Membrane for High Temperature PEM Fuel Cell’’ Received 3 August 2010; accepted 18 November 2011DOI 10.1002/app.36507

 G. Liu, H. Zhang, J. Hu, Y. Zhai, D. Xu, Z.G. Shao, ’’Studies of performance degradation of a high temperature PEMFC based on H3PO4-doped PBI’’. Journal of Power Sources 162 (2006) 547–552

 H.J. Kim, S.J. An, J.Y. Kim, J.K. Moon, S.Y. Cho, Y.C. Eun, H. K. Yoon, Y. Park, H. J. Kweon, E. M. Shin, ’’Polybenzimidazoles for high temperature fuel cell applications’’Macromol. Rapid Commun.25 (2004) 1410–1413

國際替代計量

Pt-C/PBI/PVDF/DMAc觸媒溶液應用於PBI高溫燃料電池膜電極組製作

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