柠檬酸盐法制备的La_(0·8)Sr_(0·2)Ga_(0·8)Mg_(0·15)Co_(0·05)O_3夹层对阴极性能的影响  

Effect of a La_(0.8)Sr_(0.2)Ga_(0.8)Mg_(0.15)Co_(0.05)O_3 interlayer synthesized by the citrate method on the cathode performance

作　　者：王世忠[1] 邹玉满[1] 钟昊[1] 

机构地区：[1]厦门大学化学系,福建厦门361005

出　　处：《电池》2006年第3期184-186,共3页Battery Bimonthly

基　　金：福建省科技攻关计划重点项目(2003H046);留学回国人员基金资助项目

摘　　要：考察了在Sm0.5Sr0.5CoO3(SSC)-La0.8Sr0.2Ga0.8Mg0.15Co0.05O3(LSGMC5)/LSGMC5界面中加入柠檬酸盐法合成的LSGMC5夹层对界面的影响。考察了含不同温度焙烧的LSGMC5夹层的SSC-LSGMC5/LSGMC5/LSGMC5组合的微观结构及电化学性能。当夹层焙烧温度高于1 623 K时,夹层与电极的结合优于无夹层的电极/电解质界面,具有大的两相界面面积及三相界面长度。制备的组合的氧还原性能依赖于夹层以及电极的焙烧温度,含有1 673 K烧结夹层、1 123 K焙烧电极的样品具有最高的活性。与含固相法制备的LSGMC5夹层的样品相比,采用含柠檬酸盐法制备的夹层的组合具有更小的欧姆电阻及更高的氧还原活性。The effect of the addition of a La0.8Sr0.2Ga0.8Mg0.15Co0.05O3（LSGMC5） interlayer synthesized by the citrate method into the Sm0.5Sr0.5CoO3（SSC）-LSGMC5/LSGMC5 interface was studied. Microstructures and electrochemical performance of the SSC-LSGMC5/LSGMC5/LSGMC5 assembly with an LSGMC5 interlayer synthesized at various temperatures were studied. The bonding of electrode/interlayer interface was better than that of electrode/electrolyte interface without interlayer when the sintered temperature was higher than 1 623 K, showed a larger two-phase boundary area and three-phase boundary length. The performance of prepared assembly depended on the sintering temperature of both the interlayer and the electrode. The sample assembly with an interlayer sintered at 1 673 K and an electrode sintered at 1 123 K exhibited the highest performance. Compared with the assembly with an LSGMC5 interlayer synthesized by the solid-state reaction, assembly with an LSGMC5 interlayer synthesized by the citrate method showed a reduced ohmic resistance and improved activity for oxygen reduction.

关 键 词：柠檬酸盐法 固体氧化物燃料电池 SSC阴极 镓酸镧 夹层 

分 类 号：TM911.47[电气工程—电力电子与电力传动]