矿冶工程
礦冶工程
광야공정
2009年
6期
82-84,88
,共4页
江丽娜%黄守国%谢瑜%黄德冰%卢其亮
江麗娜%黃守國%謝瑜%黃德冰%盧其亮
강려나%황수국%사유%황덕빙%로기량
溶胶凝胶法%中温固体氧化物燃料电池%钙钛矿%La_(0.8)Sr_(0.2)FeO_3%阴极材料
溶膠凝膠法%中溫固體氧化物燃料電池%鈣鈦礦%La_(0.8)Sr_(0.2)FeO_3%陰極材料
용효응효법%중온고체양화물연료전지%개태광%La_(0.8)Sr_(0.2)FeO_3%음겁재료
sol-gel method%intermediate temperature solid oxide fuel cell%perovskite%La_(0.8)Sr_(0.2)FeO_3%cathode material
以溶胶凝胶法合成了La_(0.8)Sr_(0.2)FeO_3(LSF)粉体,用于中温固体氧化物燃料电池阴极材料.分别利用热分析(TG-DTG-DTA)、X射线衍射分析(XRD)、透射电镜(TEM)和交流阻抗谱仪(ACEIS)对粉体和阴极进行表征.结果表明,随着温度升高,经过粉体失水、硝酸盐分解等过程,在600 ℃已基本形成钙钛矿相,1000 ℃时为单一的钙钛矿相,煅烧4 h后的粒径约为80 nm.在800 ℃的阴极界面阻抗为0.12 Ω·cm~2.
以溶膠凝膠法閤成瞭La_(0.8)Sr_(0.2)FeO_3(LSF)粉體,用于中溫固體氧化物燃料電池陰極材料.分彆利用熱分析(TG-DTG-DTA)、X射線衍射分析(XRD)、透射電鏡(TEM)和交流阻抗譜儀(ACEIS)對粉體和陰極進行錶徵.結果錶明,隨著溫度升高,經過粉體失水、硝痠鹽分解等過程,在600 ℃已基本形成鈣鈦礦相,1000 ℃時為單一的鈣鈦礦相,煅燒4 h後的粒徑約為80 nm.在800 ℃的陰極界麵阻抗為0.12 Ω·cm~2.
이용효응효법합성료La_(0.8)Sr_(0.2)FeO_3(LSF)분체,용우중온고체양화물연료전지음겁재료.분별이용열분석(TG-DTG-DTA)、X사선연사분석(XRD)、투사전경(TEM)화교류조항보의(ACEIS)대분체화음겁진행표정.결과표명,수착온도승고,경과분체실수、초산염분해등과정,재600 ℃이기본형성개태광상,1000 ℃시위단일적개태광상,단소4 h후적립경약위80 nm.재800 ℃적음겁계면조항위0.12 Ω·cm~2.
La_(0.8)Sr_(0.2)FeO_3 powders were prepared by sol-gel method,which can be used as cathode material of intermediate temperature solid oxide fuel cell. The powders and cathode were characterized by thermogravimetry-differential coefficient thermogravimetry-differential thermal analysis(TG-DTG-DTA), X-ray diffraction(XRD), transmission electron microscopy(TEM) and AC electrochemical impedance spectroscopy(ACEIS) respectively. The results indicated that, with the increase of temperature, the powders lost water and nitrate decomposed. After this process, perovskite phase formed basically at 600 ℃, single perovskite phase formed at 1000 ℃ and the grain size was approximately 80 nm after calcination for 4 h. The interfacial impedance of cathode was 0.12 Ω·cm~2 at 800 ℃.
