本研究目標為建立一套完整的淨輸出功率為 3W 的呼吸式直接硼氫化鈉燃料電池系統，主要可用於手持 3C 產品之發電系統，此種質子交換膜燃料電池具有高體積能量密度與功率密度，適合應用在 3C 產品電源供應裝置。陰極供給空氣，將可節省陰極燃料槽之空間與重量。
研究內容為，設計新型呼吸式燃料電池，並與傳統型做比較。因實驗內容與空氣流場有關，故使用 Fluent 軟體，進行流場數值分析，探討陰極端空氣質量流率。此研究為模擬與實驗並進之研究。
呼吸式燃料電池單電池本體機械幾何結構，首先參考相關文獻以完成燃料電池之各零組件的結構設計並且測試是否達到文獻中之性能，以做為電池基本結構有無問題之確認，找出最佳的操作參數使電池系統達到最好的能量轉換效率，研究中探討兩種不同觸媒之 MEA，並探討操作參數對性能之影響，其中測試參數包括 (1) 陰極端氣體支撐層測試實驗 (2) Contact layer 測試實驗 (3) 電池開放式集電板幾何設計之影響及擺放方式測試實驗 (4) 陽極端燃料濃度測試實驗 (5) 電池操作溫度測試實驗 (6) 陽極端燃料流率之測試實驗；探討燃料電池性能與元件操作參數，利用 I-V-P 性能曲線測試使電池整體達到穩定及最有效率的運作，也將訂定呼吸式 DBFC 的操作標準程序，作為未來建立燃料電池整體發電系統及周邊設備之參考依據。

The proposed research aims to develop an Air
Breathing Direct Sodium Borohydride Fuel Cell (Air Breathing DBFC) system that can generate a net
electric power of 3 Watts. This type of proton exchange membrane fuel cell is usually characterized by a high volumetric energy density and a high power density. Such characteristics can potentially lead to the creation of efficient portable auxiliary electric power system for 3C products. Moreover, the use of air as oxidant drastically reduces the size and the weight of the fuel cell system by removing the oxidant fuel tank.
In the current work, two different fuel cell designs have been created and compared. In addition to a traditional design, an alternative design is proposed in order to improve the air flow near the reacting area. Fluent CFD software was used to analyze and compare the air flow field.
Prototypes of an Air Breathing DBFC single cell were then manufactured, tested and compared with relevant literature references. In order to find the optimal design and operating conditions, a series of experiments was conducted.
The test matrix is composed of 6 variables: (1) the GDB of the cathode, (2) the presence of a Contact layer, (3) the orientations of the fuel cell, (4) the concentrations of the fuel, (5) the temperature of the fuel cell and (6) the fuel flow rate.
In the best conditions, the prototype delivers a bit more than the 3 Watts with a reacting area of only 25cm². The feasibility of the concept is thus proven and the
foundations for a future commercial development of the Air Breathing DBFC products are put in place.

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