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    • 3. 发明授权
    • Method of forming a leak proof plasma sprayed interconnection layer on
an electrode of an electrochemical cell
    • 在电化学电池的电极上形成防漏等离子体喷涂互连层的方法
    • US5391440A
    • 1995-02-21
    • US195335
    • 1994-02-14
    • Lewis J. H. KuoShailesh D. Vora
    • Lewis J. H. KuoShailesh D. Vora
    • C23C4/10C23C4/18H01M8/02H01M8/12B05D5/12
    • H01M8/0215C23C4/11C23C4/18H01M2008/1293H01M2300/0074Y10T29/49115
    • A dense, substantially gas-tight, electrically conductive interconnection layer is formed on an electrode structure of an electrochemical cell by: (A) providing an electrode structure; (B) forming on a selected portion of the electrode surface, an interconnection layer having the general formula La.sub.1-x M.sub.x Cr.sub.1-y N.sub.y O.sub.3, where M is a dopant selected from the group of Ca, Sr, Ba, and mixtures thereof, and where N is a dopant selected from the group of Mg, Co, Ni, Al, and mixtures thereof, and where x and y are each independently about 0.075-0.25, by thermally spraying, preferably plasma arc spraying, a flux added interconnection spray powder, preferably agglomerated, the flux added powder comprising flux particles, preferably including dopant, preferably (CaO).sub.12. (Al.sub.2 O.sub.3).sub.7 flux particles including Ca and Al dopant, and LaCrO.sub.3 interconnection particles, preferably undoped LaCrO.sub.3, to form a dense and substantially gas-tight interconnection material bonded to the electrode structure by a single plasma spraying step; and, (C) heat treating the interconnection layer at from about 1200.degree. to 1350.degree. C. to further densify and heal the micro-cracks and macro-cracks of the thermally sprayed interconnection layer. The result is a substantially gas-tight, highly doped, electrically conductive interconnection material bonded to the electrode structure. The electrode structure can be an air electrode, and a solid electrolyte layer can be applied to the unselected portion of the air electrode, and further a fuel electrode can be applied to the solid electrolyte, to form an electrochemical cell for generation of electrical power.
    • 通过以下方式在电化学电池的电极结构上形成致密的,基本上气密的导电互连层:(A)提供电极结构; (B)在电极表面的选定部分上形成具有通式La1-xMxCr1-yNyO3的互连层,其中M是选自Ca,Sr,Ba及其混合物的掺杂剂,其中N是 选自Mg,Co,Ni,Al及其混合物的掺杂剂,其中x和y各自独立地为约0.075-0.25,通过热喷涂,优选等离子体电弧喷涂,添加助焊剂的互连喷雾粉末,优选聚集 助焊剂添加粉末包含助焊剂颗粒,优选包括掺杂剂,优选(CaO)12(Al 2 O 3)7助焊剂颗粒,包括Ca和Al掺杂剂,以及LaCrO 3互连颗粒,优选未掺杂的LaCrO 3,以形成致密且基本上气密的互连 通过单个等离子体喷涂步骤与电极结构结合的材料; 和(C)在约1200℃至1350℃下对互连层进行热处理,以进一步致密化和热处理热喷涂互连层的微裂纹和大裂纹。 结果是结合到电极结构的基本上气密的,高掺杂的导电互连材料。 电极结构可以是空气电极,并且可以将固体电解质层施加到空气电极的未选择部分,并且还可以将燃料电极施加到固体电解质上,以形成用于产生电力的电化学电池。