Development of Solid Oxide Fuel Cell by Using Synthesis from Aqueous Solutions

燃料电池可以有效地将化学能源转化为电气能源，并避免对Carnot的限制。固体氧化物燃料电池（SOFC）是一个在高温下运行的全固态电力系统。SOFCs有多层结构，无论是在无线层、电线层和阴极层，都是由陶瓷制成的，都是在像三明治这样的序列中进行的。高效率的SOFC系统的制造需要以薄膜形式的组件。从正常温度和正常压力中合成固体氧化物燃料电池陶瓷材料的方法是在宽区域制作薄膜和/或复杂形状时不需要真空或高温，并由于低成本的原因而具有较高的应用性。Solutions of fluoro-complex ions were obtained by dissolving sodium hexafluorozirconate in distilled water or dissolving LaMeO y D23 y D2 （Me=Cr， Mn， Fe， Co）or （La，Sr）MeO y D23 y D2 perovskite prepared by usual solid state reaction in hydrofluoric acid。Boric acid被添加到解决方案中，氟化物ions是由BF-D14-Y-D1复合体形成而消费的，然后氟化物复合体被氢化成ZrO-D22-Y-D2，LaMeO-D23-Y-D2 or（La，Sr）MeO-D23-Y-D2按顺序增加氟离子的数量。该产品的高水晶强度是由锐利和强X射线差异峰确认的。Aggregates of synthesized ZrOイD22イD2， LaMeOイD23イD2 or（La，Sr）MeOイD23イD2 were observed on the substrates in scanning electron microscope images。沉积的LaMnO D23在yttria stabilized zirconia substrate由使用此方法执行。

Fuel Cells can convert chemical energy into electrical energy efficiently, avoiding the Carnot restriction. The solid oxide fuel cell(SOFC)is an all-solid-state power system which operates at high temperatures. SOFCs have mulitlayer structures where anode layer, electrolyte layer and cathode layer, all made of ceramics, are piled in sequence like sandwiches. Fabrication of highly efficient SOFC systems requires components in the form of thin films. Methods for synthesizing solid oxide fuel cell ceramic materials from aqueous solutions at ordinary temperatures and ordinary pressures are advantageous because of the applicability to making films with wide areas and/or complicated shapes with no requirement of vacuum or high temperature, and because of lower cost. Solutions of fluoro-complex ions were obtained by dissolving sodium hexafluorozirconate in distilled water or dissolving LaMeOィイD23ィエD2 (Me=Cr, Mn, Fe, Co)or (La,Sr)MeOィイD23ィエD2 perovskite prepared by usual solid state reaction in hydrofluoric acid. Boric acid was added into the solution, the fluoride ions were consumed by the formation of BFィイD14-ィエD1 complex ion, and then the fluoro-complex ions were hydrolyzed to ZrOィイD22ィエD2, LaMeOィイD23ィエD2or(La,Sr)MeOィイD23ィエD2 in order to increase the amount of fluoride ions. The high crystallinity of the product was confirmed by sharp and strong X-ray diffraction peaks. Aggregates of synthesized ZrOィイD22ィエD2, LaMeOィイD23ィエD2or(La,Sr)MeOィイD23ィエD2 were observed on the substrates in scanning electron microscope images. Deposition of LaMnOィイD23ィエD2 on yttria stabilized zirconia substrate was performed by using this method.