甘氨酸-硝酸盐法制备中温SOFC电解质及电极材料  

Electrolyte and Electrode Materials of Intermedium-temperature SOFC Prepared by Glycine-nitrate Process

作　　者：纪媛[1] 刘江[1] 贺天民[1] 丛立功[1] 苏文辉 

机构地区：[1]吉林大学稀土固体物理研究中心和凝聚态物理研究中心

出　　处：《高等学校化学学报》2002年第7期1227-1230,共4页Chemical Journal of Chinese Universities

基　　金：国家发展计划委员会;吉林省计划委员会重点攻关项目 (批准号 :85 -715 -2 1-0 2 );国家科技部 863项目 (批准号 :2 0 0 1AA3 2 3 0 90 )资助

摘　　要：采用一种新的燃烧合成陶瓷粉末的方法——甘氨酸 -硝酸盐法合成中温 SOFC所有元件的初始粉体 ,电池的电解质材料是 (Ce O2 ) x(Sm O1 .5) 1 - x(x=0 .9,0 .85 ,0 .8) ,阳极材料是掺 (Ce O2 ) 0 .8(Sm O1 . 5) 0 .2 (SDC)的Ni O,阴极材料是 SDC与 La0 .6 Sr0 .4 Fe0 .8Co0 .2 O3的复合材料 .其中以 (Ce O2 ) 0 .9(Sm O1 .5) 0 .1 为电解质的单电池性能最好 ,在 75 0℃时短路电流密度为 0 .5 A/cm2 ,最大功率密度达 0 .1 0 4W/cm2 .通过 SEM结果分析 ,掺杂摩尔分数 2 0 % Sm O1 .5的电解质晶界非常明显 ,而掺杂 1 0 %的电解质晶界有很强的融合消失的趋势 .By using a new combustion synthesis method, the glycine nitrate process, all the nano size materials were prepared for a single solid oxide fuel cell(SOFC), in which(CeO 2) x (SmO 1.5 ) 1- x (x =0 9, 0 85, 0.8) were used as the electrolytes, La 0.6 Sr 0.4 Fe 0.8 Co 0.2 O 3 with 50% samaria doped ceria(SDC) was selected as the cathode material, and a SDC NiO Ni composite powder was used as the anode material. In this study, the performance of the SOFC was obtained up to 750 ℃ , the maximum power density of 0.104 W/cm 2 and a short circuit current density of 500 mA/cm 2 of the cell was achieved at 750 ℃ by using (CeO 2) 0.9 (SmO 1.5 ) 0.1 electrolyte. The inferior SOFC performance of the (CeO 2) 0.8 (SmO 1.5 ) 0.2 electrolyte was due to the physical discontinuity at the clearly grain boundary and could effectively introduce barriers to ionic conduction in reducing atmosphere, while the (CeO 2) 0.9 (SmO 1.5 ) 0.1 electrolyte′s boundary tends to be merged.

关 键 词：电解质 电极材料 甘氨酸-硝酸盐法 IT-SOFC 中温固体氧化物燃料电池 氧化钐 氧化铈 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TM2[一般工业技术—材料科学与工程]