固相法和甘氨酸-硝酸盐法合成LSCM阳极材料性能比较(英文)  

Performance Comparison of LSCM Anode Materials Prepared by Solid Method and Glycine Nitrate Process

作　　者：于洁[1,2] 陈秀华[3] 贺韬[1] 张徐民[3] 马文会[1] 王华[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093 [2]昆明理工大学环境科学与工程学院,云南昆明650093 [3]云南大学物理科学技术学院,云南昆明650093

出　　处：《中山大学学报（自然科学版）》2009年第S2期164-167,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(50204007);教育部新世纪优秀人才支持计划基金资助项目(NCET-07-0387)

摘　　要：采用固相法和甘氨酸-硝酸盐法(GNP)分别合成了La_(0.7)Sr_(0.3)Cr_(0.5)Mn_(0.5)O_(3-δ)固体氧化物燃料电池阳极材料:LSCMS(固相法)和LSCM-G(GNP)。扫描电镜分析表明LSCM-G材料粒径比LSCM-S小。空气中250-850℃下,LSCM-S比LSCM-G电导率稍高;850℃下在甲烷中,LSCM-G比LSCM-S电导率高,850℃下在H_2中两者电导率几乎相同,约为0.2S/cm。H_2程序升温还原说明LSGM-G与H_2发生还原反应的温度更低,反应活性更高。LSCM-G比LSCM-S更适合作为固体氧化物燃料电池阳极材料。Anode material La_(0.7) Sr_(0.3) Cr_(0.5) Mn_(0.5) O_(3-δ) was prepared by solid method(LSCM-S) and glycine nitrate process(GNP) (LSCM-G) respectively.Scanning electron microscopy(SEM) showed that the grain size of LSCM-G is smaller than LSCM-S,and the relative surface area was 13.87 cm^2/g(LSCM-S) and 24.41 cm^2/g(LSCM-G),respectively.The electrical conductivity of LSCM-S was a little higher than LSCM-G in air between 250℃to 850℃attributed to the higher electrical activation energy of LSCM-G.While the electrical conductivity of LSCM-G(0.9S/cm) is higher than LSCM-S(0.2S/cm) at 850℃in CH_4,and their electrical conductivity in H_2 was almost the same at 850℃about 0.2S/cm.Temperature process reduction in H_2(H_2-TPR) showed reaction between LSCM-G and H_2 appeared at lower temperature around 500℃than LSCM-S.In general,LSCM-G material is more wonderful than LSCM-S for intermediate temperature solid oxide fuel cell anode(IT-SOFC).

关 键 词：La_0.7Sr_0.3Cr_0.5Mn_0.5O_3-δ 固相法 甘氨酸-硝酸盐法 电导率 

分 类 号：TM911.4[电气工程—电力电子与电力传动]