Ba0.5Sr0.5Co0.8Fe0.2O3-δ-La3Ni2O7+δ複合 結構應用於P-SOFC陰極之可行性研究;Feasibility of Ba0.5Sr0.5Co0.8Fe0.2O3-δ -La3Ni2O7+δ composite structure for the cathode in proton-conductive solid oxide fuel cells

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题名:	Ba0.5Sr0.5Co0.8Fe0.2O3-δ-La3Ni2O7+δ複合結構應用於P-SOFC陰極之可行性研究;Feasibility of Ba0.5Sr0.5Co0.8Fe0.2O3-δ -La3Ni2O7+δ composite structure for the cathode in proton-conductive solid oxide fuel cells
作者:	丁鴻鈞;Ding, Hong-Jun
贡献者:	材料科學與工程研究所
关键词:	固態氧化物燃料電池;陰極;SOFC;cathode
日期:	2017-08-22
上传时间:	2017-10-27 13:18:02 (UTC+8)
出版者:	國立中央大學
摘要:	本研究之目的在利用具有三重載子(e-、H+、O2-) 的Ruddleson-Popper (RP)層狀結構的導體氧化物La3Ni2O7+δ (代號LNO2) 與具有優良電化學活性的鈣鈦礦結構氧化物Ba0.5Sr0.5Co0.8Fe0.2O3-δ (代號BSCF)粉末互相混合，製作複合結構，以探討其作為質子傳導型固態燃料電池陰極材料的可行性。LNO2與BSCF等原料粉末均以甘胺酸-硝酸鹽經燃燒反應法製備。燃燒過程中藉由控制前驅溶液參數，而燃燒反應後則藉由改變煆燒溫度，分別觀察這些煆燒後氧化物的結晶結構與表面形貌；煆燒所得LNO2 和BSCF粉末，分別以LNO2/BSCF = 0/100、15/85、30/70、50/50、75/25等不同重量比例混和，混合後經導電性與電化學特性測量，進而將此粉末調漿、網印於質子傳輸型氧化物燃料電池，製作半電池與全電池，評估電池的功率密度。;In this study, we introduce a triple carrier conductor material La3Ni2O7+δ (LNO2) with a Ruddleson-Popper (RP) layered structure into an excellent electrochemical activity Material Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) to create a composite structure. In order to improve the conductivity and active electrochemical area of the cathode element. The feasibility of applying this material in proton conducting solid oxide fuel cells cathode was discussed by conductivity testing and the power density, electrochemical impedance spectroscopy (EIS) of the full cell. The LNO2 and BSCF powders were prepared by glycine-nitrate combustion reaction. We changed the pH value of the precursor solution and the calcination in different temperature to find the best conditions. After the combustion process and calcination, the structure, Crystallinity and surface morphology was observed by scanning electron microscopy (SEM) and X-ray diffractometry (XRD). Then, LNO2 and BSCF were mixed with different weight percentage (LNO2/ BSCF = 0/100, 15/85, 30/70, 50/50, 75/25) to test conductivity, and made into cathode paste. The cathode paste was then screen-printed on the electrolyte supporting half-cell to make full cells. The power density and EIS of the full cells were tested in 600,700, 800°C. The flow rates of air and hydrogen were 400 and 200 c.c./min, respectively.
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