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

利用水溶液合成技术开发固体氧化物燃料电池

基本信息

批准号：
09355020
负责人：
YAO Takeshi
金额：
$ 22.53万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09355020/
关键词：
synthesis from aqueous solution solid oxide fuel cell thin film solid state electrolyte electrode catalyst zirconia lanthanum transition metal oxide perovskite 燃料電池積層固体酸化物型燃料電池酸化マンガンランタン酸化コバルトランタン酸化クロムランタン酸化鉄ランタン

项目摘要

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.

燃料电池可以有效地将化学能转化为电能，避免了卡诺限制。固体氧化物燃料电池（SOFC）是一种全固态高温动力系统。SOFC具有多层结构，其中阳极层、电解质层和阴极层都由陶瓷制成，像三明治一样依次堆叠。高效SOFC系统的制造需要薄膜形式的组件。在常温和常压下由水溶液合成固体氧化物燃料电池陶瓷材料的方法是有利的，因为其适用于制备具有宽面积和/或复杂形状的膜而不需要真空或高温，并且因为其成本较低。通过将六氟锆酸钠溶解在蒸馏水中或将通过通常的固相反应制备的LaMeO_xD_23_xD_2（Me=Cr，Mn，Fe，Co）或（La，Sr）MeO_xD_23_xD_2钙钛矿溶解在氢氟酸中获得氟络合离子溶液。在溶液中加入硼酸，形成BF型络合物D14-Br型络合物D1，消耗氟离子，然后将氟离子水解为ZrO型络合物D22-Br型络合物D2、LaMeO型络合物D23-Br型络合物D2或（La，Sr）MeO型络合物D23-Br型络合物D2，以增加氟离子的量。产物的高结晶度由尖锐且强的X射线衍射峰证实。在扫描电子显微镜图像中观察到合成的ZrO_（60）D_（22）D_（23）D_（22）、LaMeO_（60）D_（23）D_（23）D_（22）或（La，Sr）MeO_（60）D_（23））D_（23）D_（23）D_（22）的聚集体在基底上。利用该方法在氧化钇稳定的氧化锆衬底上沉积了LaMnO_xD_23_xD_2。