| 摘要: | 區域性分散式發電預料將成為未來電力來源之趨勢，而燃料電池則是極具潛力之發電來源之一，故投入資源研發燃料電池技術對於發展分散式以及潔淨能源能有相當大之幫助。發展高溫型燃料電池則可幫助降低鉑金使用量，提高電池熱力學效率，更可提高CO之容忍度，也可降低燃料電池系統之氫氣純化成本。發展金屬雙極板可有效降低雙極板材料成本、加工及組裝時間成本，另外也可增加燃料電池之單位重量與體積功率密度。高溫型金屬雙極板質子交換膜燃料電池之研究於全世界中尚不多見，為了走在研究之前端，本計畫設定此前瞻之燃料電池作為研究標的。 高溫型金屬雙極板質子交換膜燃料電池之性能率退原因包含金屬元素毒化觸媒、酸滲出、高溫造成之觸媒失活等三大原因，故針對此三原因，本計畫預計於兩年內利用實驗方法觀察並分析此三因素於高溫型金屬雙極板質子交換膜燃料電池中之行為，進一步了解此型燃料電池之性能衰退機制，期望藉由瞭解此一現象對未來提高此型燃料電池壽命做出貢獻，加速燃料電池技術發展之腳步。本計畫具有相當好的新穎性及前瞻性，在目前可找出的文獻中，尚未發現與此計畫直接相關之研究成果，故本計畫預計能產出高價值之學術論文，提高我國於國際上燃料電池領域之地位。
Regional distributed power generation has become a trend of future power supply. Fuel cell technology is one promising option among all possible distributed power sources. Thus, pouring resources into the development of fuel cells can not only significantly assist future development of clean energy but also development of distributed power generation. Developing high temperature proton exchange membrane fuel cells can possibly reduce the Pt loading in the MEA, increase the thermal efficiency of fuel cells, improve CO tolerance and lower the cost of hydrogen purification. Replacing traditional graphite bipolar plates by thin metallic bipolar plates can effectively reduce the costs of material, fabrication and assembly of bipolar plates. In addition, using thin metallic bipolar plates can improve the power densities per unit volume and per unit weight of fuel cells. The studies of high temperature proton exchange membrane fuel cells with metallic bipolar plates are scare presently. Therefore, this type of fuel cell is selected as the research target in this project to keep being in the front-end of the fuel cell research. The reasons of performance degradation of a high temperature proton exchange membrane fuel cell with metallic bipolar plates comprise metal element poisoning the catalyst, acid leaching out and catalyst deactivation resulting from a high operational temperature. Thus this project is aimed to observe and analyze the performance degradation phenomena caused by the three factors within two years and to further understand the degradation mechanism in a high temperature proton exchange membrane fuel cell with metallic bipolar plates. It is expected to make a contribution to the improvement of the operational life of a high temperature proton exchange membrane fuel cell with metallic bipolar plates and the development progress of fuel cells by studying the degradation mechanism. This project has a great novelty and perspectiveness. Among the accessible literatures, no researches directly related to this project can be found. As a result, it is expected to disclose key information of performance degradation of high temperature proton exchange membrane fuel cells with metallic bipolar plates and to publish outstanding academic papers at the end of this project. |
