中温SOFC阳极阻挡层La_(0.45)Ce_(0.55)O_(2-δ)薄膜的制备  

Preparation of La_(0.45)Ce_(0.55)O_(2-δ) Anode Interlayer Film for IT-SOFC

作　　者：朱晓东[1] 孙克宁[1] 张乃庆[1] 陈新兵[1] 吴丽军[1] 周德瑞[1] 

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《稀有金属材料与工程》2007年第11期2016-2019,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(90510006)

摘　　要：La0.45Ce0.55O2-δ(简称LDC45)作为Ni-LDC45阳极和LSGM电解质之间的阻挡层可以阻止二者之间的固相界面反应。采用丝网印刷方法制备了LDC45阻挡层薄膜,并从粘结剂的选择、膜层的丝网印刷和烧结工艺的优化3个方面对LDC45阻挡层的制备工艺进行了详细研究。通过对粘结剂的筛选,发现采用乙基纤维素能获得较为致密的阻挡层;通过丝网印刷工艺的研究,发现刮板和53μm丝网分别是较为理想的印刷工具和丝网规格;通过对烧结工艺的优化,发现1400℃是烧结阻挡层的最佳温度。引入LDC45阻挡层可以有效阻止阳极与电解质之间的界面反应,并对燃料的化学吸附的分离有催化作用,将电池的最大输出功率密度提高了72%。La0.45Ce0.55O2-δ （LDC45） as an interlayer between the Ni-LDC45 anode and La0.9Sr0.1Ga0.8Mg0.2O3-δ （LSGM） electrolyte can prevent the solid-state reactions between Ni and LSGM. In this study, the LDC45 interlayer film is prepared by screen-printing, and the processes, such as the binder selection, the screen-printing of film, and the sintering, are researched in detail. The results showed that compact interlayers are obtained with CMC as the binder. During the screen-printing, a squeegee and the screen of 53 μm are suitable for obtaining a thin and dense interlayer. The influence of firing temperature on the micromorphology of LDC45 film is also investigated, it is found that the optimum temperature is 1400 ℃. A dense LDC45 interlayer film could effectively suppress the interface reaction between anode and electrolyte, catalyze the dissociative chemisorption of the fuel, and increase the maximum power density of cells by 72%.

关 键 词：SOFC 镓酸镧 阻挡层 La0.45Ce0.55O2-δ拼界面反应 

分 类 号：TM911.4[电气工程—电力电子与电力传动]