ZnO对Ce_(0.8)Gd_(0.1)RE_(0.1)O_(2-α)(RE=Lu,Tm)中温电性能的影响  

Effects of ZnO on the Intermediate Temperature Electrical Properties of Ce_(0.8)Gd_(0.1)RE_(0.1)O_(2-α)(RE=Lu,Tm)

作　　者：胡文丽 陈卫 王洪涛 HU Wen-li;CHEN Wei;WANG Hong-tao(School of Primary Education,Fuyang Preschool Teachers College,Fuyang 236015,China;School of Chemical and Material Engineering,Fuyang Normal University,Fuyang 236037,China)

机构地区：[1]阜阳幼儿师范高等专科学校小学教育学院,安徽阜阳236015 [2]阜阳师范大学化学与材料工程学院,安徽阜阳236037

出　　处：《稀土》2024年第5期56-64,I0004,共10页Chinese Rare Earths

基　　金：安徽省高校自然科学研究重点项目(KJ2021A1571,KJ2021A1572,2022AH052989);安徽省教育厅教学研究重点项目(2021jyxm1125)。

摘　　要：采用硝酸盐-柠檬酸燃烧法,在不同烧结温度下制备了Ce_(0.8)Gd_(0.1)Lu_(0.1)O_(2-α)(CGLu-1450)、Ce_(0.8)Gd_(0.1)Lu_(0.1)O_(2-α)-4%ZnO (CGLu-ZnO-1450)、Ce_(0.8)Gd_(0.1)Lu_(0.1)O_(2-α)-4%ZnO (CGLu-ZnO-1400)、Ce_(0.8)Gd_(0.1)Tm_(0.1)O_(2-α)(CGTm-1400)和Ce_(0.8)Gd_(0.1)Tm_(0.1)O_(2-α)-4%ZnO (CGTm-ZnO-1400)固体电解质陶瓷材料。研究了烧结温度、共掺杂离子以及烧结助剂的添加对样品中温电性能的影响。采用X射线衍射仪和扫描电子显微镜测试方法对所合成样品的晶体结构和微观形貌进行了分析与表征。结果表明,烧结助剂ZnO的添加有助于晶界的成长,能有效地提高样品的烧结致密性。750℃时,CGLu-ZnO-1450、CGLu-ZnO-1400和CGTm-ZnO-1400的电导率分别达到2.6×10^(-2)S·cm^(-1),3.9×10^(-2)S·cm^(-1)和4.5×10^(-2)S·cm^(-1)。CGLu-ZnO-1400和CGTm-ZnO-1400在750℃下的最高功率密度分别为47.6mW·cm-2和51.6mW·cm-2。实验结果表明,CGTm-ZnO-1400具有较高的电导率和燃料电池性能,是中温燃料电池用优良电解质。Ce_(0.8)Gd_(0.1)Lu_(0.1)O_(2-α)(CGLu-1450),Ce_(0.8)Gd_(0.1)Lu_(0.1)O_(2-α)-4%ZnO(CGLu-ZnO-1450),Ce_(0.8)Gd_(0.1)Lu_(0.1)O_(2-α)-4%ZnO(CGLu-ZnO-1400),Ce_(0.8)Gd_(0.1)Tm_(0.1)O_(2-α)(CGTm-1400)and Ce_(0.8)Gd_(0.1)Tm_(0.1)O_(2-α)-4%ZnO(CGTm-ZnO-1400)solid electrolyte ceramic materials were synthesized at different sintering temperatures by a nitrate-citric acid combustion method.The effects of sintering temperatures,co-doped ions and addition of sintering additives on intermediate temperature electrical properties of samples were investigated.The micro morphologies and crystal structures of synthesized samples were investigated by using scanning electron microscopy(SEM)and X-ray diffraction(XRD).SEM results showed that the addition of sintering additive ZnO was helpful to the growth of grain boundary and effectively improved the sintering compactness of the samples.The conductivities of CGLu-ZnO-1450,CGLu-ZnO-1400 and CGTm-ZnO-1400 reached 2.6×10^(-2)S·cm^(-1),3.9×10^(-2)S·cm^(-1) and 4.5×10^(-2)S·cm^(-1) at 750℃,respectively.The maximum output power densities of CGLu-ZnO-1400 and CGTm-ZnO-1400 were 47.6 mW·cm^(-2) and 51.6 mW·cm^(-2) at 750℃,respectively.The results showed that CGTm-ZnO-1400 had the highest conductivity and fuel cell performance,and was an excellent electrolyte for intermediate-temperature fuel cells.

关 键 词：电解质 CeO_(2) 共掺杂 电导率 燃料电池 

分 类 号：TQ133.3[化学工程—无机化工] O614.33[理学—无机化学]