固態氧化物燃料電池連接板之氧化行為與電阻測試; Interconnect oxide behavior and electronic resistance of SOFC

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Title:	固態氧化物燃料電池連接板之氧化行為與電阻測試;Interconnect oxide behavior and electronic resistance of SOFC
Authors:	陳俊銘;Chun-Ming Chen
Contributors:	機械工程研究所
Keywords:	固態氧化物燃料電池;連接板;SOFC;Interconnect
Date:	2006-07-05
Issue Date:	2009-09-21 11:53:56 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	連接板是固態氧化物燃料電池中重要元件之一，連接板所扮演的角色除了用來串接單電池組外，另一項功能就是分隔陽極與陰極的氣體流竄。固態氧化物燃料電池操作溫度高達800℃，故連接板在高溫的環境下必須具有良好的抗氧化能力及材料結構的穩定性，本實驗針對金屬連接板進行高溫實驗，高溫實驗單純將連接板置入高溫爐內，簡化模擬陰極的反應，因空氣並無不斷供應故僅作到持溫200小時。結果顯示Crofer 22電阻值最小且結構非常穩定，ZMG232(中鋼)與Crofer 22的結果雷同,304不鏽鋼電阻值最大且表面呈現片狀剝落狀態，Inconel 718 高溫抗氧化能力優且結構穩定但電阻值偏高，430不鏽鋼在電性表現當中有些許的不穩定，在800℃持溫50小時呈現最大的電阻值約0.0421Ω，但接下來的100小時反而下降到0.0304Ω接續才又回到穩定呈線性增加。結果仍有測出SiO2訊號強度，SiO2也是一種非常良好的抗氧化層，但缺點是導電率較低。 Interconnect is one of the critical components of a planar solid oxide fuel cell (SOFC) stack. Interconnect is used to contact with the cathode of one cell and the anode of the adjacent cell. The interconnect physically separates the anodic and the cathodic gases. Interconnect of a planar SOFC is in hot air at temperature up to 800℃.It must have resistance for oxidation and satisfactory microstructure. This experiment puts metallic interconnects into a high-temperature stove, and then simplifies the response of the simulation cathode part. Because the air has not been supplying constantly, it can only be accomplished and held warm for 200 hours. The result shows that Crofer 22 has minimum resistance value and its structure is very much steady. The result of ZMG232 is quite similar. SS304 resistance values most heavily and its surface appears state of facet scaling off. Inconel 718 has excellent temperature anti-oxidant ability but its resistance value is on the high side. SS430 has some instability in electricity behavior, and the largest resistance value during 50 hours in high temperature of 800℃ is 0.0421Ω. But after being held under high temperature of 800℃for 100 hours, it decreases to 0.0304Ω, and gets back to the stability and presents regular linear increase again. The result finds the intensity of SiO2 signal peak. SiO2 is one kind of good anti-oxidant layer, too. However, its conductive rate is relatively low.
Appears in Collections:	[Graduate Institute of Mechanical Engineering] Electronic Thesis & Dissertation

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