固体氧化物燃料电池梯度复合阴极材料的制备及性能研究  

Preparation and Performance of Grade-layer Composite Cathode for SOFCs

作　　者：李艳[1] 吕喆[2] 王洪涛[1] 王月花[1] 

机构地区：[1]中国矿业大学物理系,徐州221008 [2]哈尔滨工业大学凝聚态科学与技术研究中心,哈尔滨150001

出　　处：《无机材料学报》2007年第5期885-888,共4页Journal of Inorganic Materials

基　　金：中国矿业大学校青年科研基金(OK4485)

摘　　要：用喷涂方法在Ce_(0.8)Sm_(0.2)O_(1.9)(SDC)电解质上制备梯度复合阴极,通过X射线衍射(XRD)测试,确定了复合材料Sm_(0.5)Sr_(0.5)CoO_3(SSC)-Ce_(0.8)Sm_(0.2)O_(1.9)(SDC)的物相组成;SEM结果表明,阴极呈现多孔的微结构,且与电解质表面接触良好.每层材料的热膨胀系数随着SSC含量的增加而增大,而电阻率随着SSC含量的增加而下降.对梯度复合阴极材料的电化学性能进行了测试,结果表明:梯度复合阴极材料具有比单层SSC阴极材料更好的电化学活性.The cathode on Ce0.8Sm0.2O1.9 （SDC） electrolyte was fabricated by a spray method. The composite phases in these materials of Sm0.5Sr0.5CoO3（SSC）-Ce0.8Sm0.201.9（SDC） were proved by X- ray diffraction. The microstructure shows that cathode contacts well with electrolyte and there are many pores in the cathode. The results of thermal expansion and resistance measurements show that thermal expansion coefficient increases with the increasing of SSC, whereas the resistance decreases. The results of electrochemical measurement show that the grade-layer composite cathode has better performance than single-layer SSC cathode.

关 键 词：固体氧化物燃料电池 梯度复合 阴极 SSC 

分 类 号：TM911[电气工程—电力电子与电力传动]