電解質支撐型之固態氧化物燃料電池製程與特性研究

Fabrication and Characterization of Electrolyte-Supported Solid Oxide Fuel Cells

廖奕瑋(Yi-Wei Liao)

指導教授 ： 徐永富 ； 王錫福

國立臺北科技大學/工程學院/材料科學與工程研究所/碩士(2009年)

摘要

本研究探討電解質支撐型之固態氧化物燃料電池(SOFC)的製程與單元電池特性。實驗使用一般常見的高溫型材料，電解質為釔安定氧化鋯(8YSZ)；陽極為氧化鎳-釔安定氧化鋯(NiO-8YSZ)；陰極為摻雜鍶的錳酸鑭-釔安定氧化鋯(20LSM-8YSZ與)純20LSM。以刮刀成型法製備8YSZ電解質基材，再以網印法製備電極層，完成單元電池製作。比較不同燒結條件之8YSZ電解質基材，探討是否影響單元電池的效能。另外也探討在陽極層與陰極層加入電流收集層後，對於電池效能的影響。最後將製備完成的單元電池透過固態氧化物燃料電池量測平台，來了解不同製程下各單元電池特性，並利用場發式電子顯微鏡來觀察單元電池的微結構。本研究成功以商業黏結劑溶液製備出8YSZ薄帶漿料，經燒結製程後，8YSZ電解質基材之相對密度達98%以上，而網印上陽極層與陰極層後，經燒成製程後，微結構皆為連續多孔狀，符合SOFC電極的需求。研究發現陽極層最佳燒成溫度為1300oC，在陰極端多網印一層AgPd層，陽極端多網印一層純NiO層，皆可有效降低單元電池的歐姆阻抗。單元電池以NiO/NiO-8YSZ為陽極層結構，且以20LSM-8YSZ/20LSM為陰極層結構，並有AgPd電流收集層，所製備成的電池效能較好，在操作溫度為900oC時的最大電能密度為0.50 W/cm2，歐姆阻抗與極化阻抗分別為0.30 Ω•cm2與0.52 Ω•cm2。

關鍵字

固態氧化物燃料電池 ； 電解質支撐型 ； 刮刀成型法 ； 網版印刷法

並列摘要

In order to explore the fabrications of electrolyte-supported solid oxide fuel cell and understand the characteristics of the unit cells. The common type of high-temperature materials was used in this study. The formulations of electrolyte, anode and cathode are 8YSZ, NiO-8YSZ and 20LSM-8YSZ respectively. Electrolyte substrate was fabrication by tape casting and sintering in air at 1300~1450oC for 4h. The anode was applied using ink made from the desired composition of anode materials using a screen printer to deposit an anode, after which the anode was fired in air at 1300oC for 2h. The cathode was applied in similar manner and was fired at 1150oC for 2h. To explore the influence of the performance of the unit cells, the different sintering conditions for 8YSZ substrate were compared. In addition, comparing the anode and cathode with current collector or not effact the performance of unit cells. The full cell was located in solid oxide fuel cell measurement platform to estimate the performance of unit cells with different processes, and the microstructures of cells were investigated by FE-SEM. The relative density of 8YSZ electrolyte substrate exceeded 98%. Both the cathode layer and anode layer contain the structure with continuous pore. The results indicate that when unit cell has the structure of NiO/NiO-8YSZ anode layer, 20LSM-8YSZ/20LSM cathode layer and AgPd current collector could obtain the better performance. The maximum power density was 0.50 W/cm2 when operated temperature at 900oC, the ohmic resistance and polarization resistance value was 0.30 Ω•cm2 and 0.52 Ω•cm2.

並列關鍵字

Solid Oxide Fuel Cell ； Electrolyte-Supported ； Tape casting ； Screen printing

參考文獻

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