固態氧化物燃料電池膜電極組楊及燒結溫度對電池性能之影響

Effects of sintering temperature on performance of Ni/YSZ anodes

魏境潤(Jing-Run Wei)

指導教授 ： 翁芳柏

元智大學/工程學院/機械工程學系/碩士(2007年)

https://doi.org/10.6838/YZU.2007.00083

摘要

固態氧化物燃料電池(SOFC)較之其他種類燃料電池之差異，便在於其較高的操作溫度。舉凡SOFC各部之材料包含電池本體以及內部之電極及電解質，皆須具有可承受高溫之基本性質。事實上不只電池操作溫度高於一般電池，在SOFC膜電極組的製備過程中甚至需要經過一更高溫度的燒結過程。此燒結過程將使得NiO(導電物質)以及YSZ(電解質)的孔隙產生改變，藉以傳導離子和電子使得電池得以運作。
本研究主要鎖定於SOFC之膜電極組中陽極和電解質之燒結溫度。以此為操作條件進行不同實驗，企圖以多元角度切入更具體的剖析燒結溫度所造成的影響。此部分相關的研究文獻並不十分豐富且仍有深入探討的空間。是以本次研究中針對主題分別安排了性能測試型態學觀察、密度量測、以及電導度的量測。由性能測試可發現燒結溫度高者，於低電流輸出段性能理想，高電流段反被低溫者超越，而高溫燒結膜電極組織表面積及緻密度皆較低，卻有較佳之導電度。反之低溫燒結膜電極組有較大的反應表面積，然導電度卻不盡理想。受到各參數影響，極化曲線圖中各燒結溫度之膜電極組產生了交叉點。

關鍵字

固態氧化物燃料電池 ； 燒結

並列摘要

In this research , electrochemical activity and material property for the anode of SOFC which sintered at different temperature were studied . Ni/YSZ is obtained by reducing a NiO/YSZ for the multi-layered anode . The current-voltage characteristics for single cell with the multi-layered anode were measured . Surface area of anode sintered at different temperature were calculate by Brunauer-Emmett-Teller (BET) , and also obtained the morphology of electrode structure by scanning electron microscope (SEM) . As the results , reactant area and morphology can be effected obviously by increasing or decreasing the sintering temperature , and which also influence the conductivity of electrode structure . Conductivity of electricity and surface were two important factors for the electrochemical activities that could be understood according to the result of current-voltage characteristic .

並列關鍵字

SOFC ； sintering ； NiO

參考文獻

“Fabrication and characterization of anode-supported

“Properties of Ni/YSZ cermet as anode for SOFC,”

Solid State Ionics 132, 2000, pp.253-260.

Power Sources 135, 2004 pp. 25–28,

“Development of a multilayer anode for solid oxide fuel