公开(公告)号：US07964324B2

公开(公告)日：2011-06-21

申请号：US12475626

申请日：2009-06-01

申请人： Su-Chee Simon Wang ,  Kailash Chandra Jain ,  Joseph M. Keller ,  Rick D. Kerr

发明人： Su-Chee Simon Wang ,  Kailash Chandra Jain ,  Joseph M. Keller ,  Rick D. Kerr

IPC分类号： H01M8/00 ,  H01M4/02 ,  H01M4/36 ,  H01M4/34

CPC分类号： H01M4/9033 ,  H01M4/885 ,  H01M4/8885 ,  H01M4/8889 ,  H01M4/90 ,  H01M2004/8689 ,  H01M2008/1293 ,  Y10T29/49115

摘要： A method for improving performance of an SOFC by impregnation of the cathode with metallic silver. A solution of AgNO3 in acetonitrile is imbibed into a perovskite cathode fabricated on a electrolyte layer supported by an anode, defining an SOFC cell. The cathode imbibition may be repeated a plurality of times as may be needed depending upon the thickness of the cathode. The amount of solution soaked into the cathode results a total final weight percent of Ag in the cathode between about 0.5% and about 10%. The cathode is then fired in air at high temperature to drive off the acetonitrile and to reduce the silver ions to metallic silver. In this way, cathode electrical resistance may be reduced by as much as 52%.

摘要翻译： 一种用金属银浸渍阴极来提高SOFC性能的方法。 将AgNO 3在乙腈中的溶液吸收到由阳极支撑的电解质层上制造的钙钛矿阴极，限定了SOFC电池。 取决于阴极的厚度，可能需要重复多次阴极吸收。 浸入阴极中的溶液的量导致阴极中Ag的总最终重量百分比为约0.5％至约10％。 然后将阴极在空气中在高温下烧制以驱除乙腈并将银离子还原成金属银。 以这种方式，阴极电阻可以降低多达52％。

公开(公告)号：US20110143255A1

公开(公告)日：2011-06-16

申请号：US12635756

申请日：2009-12-11

申请人： Kailash C. Jain ,  Joseph M. Keller ,  Rick D. Kerr

发明人： Kailash C. Jain ,  Joseph M. Keller ,  Rick D. Kerr

IPC分类号： H01M8/10 ,  H01M4/48

CPC分类号： C04B35/2641 ,  C01G49/009 ,  C01G51/006 ,  C01G51/68 ,  C01P2002/34 ,  C01P2002/72 ,  C01P2002/77 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/40 ,  C04B35/2633 ,  C04B35/6261 ,  C04B35/6262 ,  C04B35/6264 ,  C04B35/62655 ,  C04B35/62675 ,  C04B2235/3213 ,  C04B2235/3227 ,  C04B2235/3272 ,  C04B2235/3275 ,  C04B2235/5409 ,  C04B2235/5445 ,  C04B2235/79 ,  H01M4/8621 ,  H01M4/9033

摘要： An improved LSCF 6428 perovskite material of the type La12zSrx+zCo0.2+aFe0.8+bO3−δ wherein x=0.4, z=(0.01−0.1), a=(0.01−0.04), and b=(0.05−0.15) for use as an SOFC cathode having increased electronic and ionic conductivity. The general formula is similar to the prior art formulae (La0.6Sr0.4)1−z Co0.2 Fe0.8O3−δ and La0.6Sr0.4 Co0.2 Fe0.8O3−δ but applies the z term to La and Sr independently as well as reducing the overall content of La. Further, by adding a small amount (a) of extra Co ions, catalytic activity, conductivity, and sinterability are further enhanced. Adding small amounts (b) of Fe and/or Fe and Co moderates the thermal expansion coefficient with no adverse effect on crystal structure or fuel cell performance. Improved sinterability, microstructure, and reduced film cracking result in high power density of fuel cells. An inherently low-cost solid state reaction method is described.

摘要翻译： La12zSrx + zCo0.2 + aFe0.8 + bO3-δ类型的改进的LSCF 6428钙钛矿材料，其中x = 0.4，z =（0.01-0.1），a =（0.01-0.04）和b =（0.05-0.15 ）用作具有增加的电子和离子电导率的SOFC阴极。 通式与现有技术公式（La0.6Sr0.4）1-z Co0.2Fe0.8O3-δ和La0.6Sr0.4Co0.2Fe0.8O3-δ相似，但将z项应用于La和 Sr以及La的总含量降低，另外，通过添加少量（a）的Co离子，能够进一步提高催化活性，导电性和烧结性。 加入少量（b）的Fe和/或Fe和Co会缓和热膨胀系数，对晶体结构或燃料电池性能没有不利影响。 改善的烧结性，微观结构和降低的膜裂纹导致燃料电池的高功率密度。 描述了固有的低成本固态反应方法。

公开(公告)号：US20100143761A1

公开(公告)日：2010-06-10

申请号：US12475626

申请日：2009-06-01

申请人： Su-Chee Simon Wang ,  Kailash Chandra Jain ,  Joseph M. Keller ,  Rick D. Kerr

发明人： Su-Chee Simon Wang ,  Kailash Chandra Jain ,  Joseph M. Keller ,  Rick D. Kerr

IPC分类号： H01M8/10 ,  H01M4/82

CPC分类号： H01M4/9033 ,  H01M4/885 ,  H01M4/8885 ,  H01M4/8889 ,  H01M4/90 ,  H01M2004/8689 ,  H01M2008/1293 ,  Y10T29/49115

摘要： A method for improving performance of an SOFC by impregnation of the cathode with metallic silver. A solution of AgNO3 in acetonitrile is imbibed into a perovskite cathode fabricated on a electrolyte layer supported by an anode, defining an SOFC cell. The cathode imbibition may be repeated a plurality of times as may be needed depending upon the thickness of the cathode. The amount of solution soaked into the cathode results a total final weight percent of Ag in the cathode between about 0.5% and about 10%. The cathode is then fired in air at high temperature to drive off the acetonitrile and to reduce the silver ions to metallic silver. In this way, cathode electrical resistance may be reduced by as much as 52%.

摘要翻译： 一种用金属银浸渍阴极来提高SOFC性能的方法。 将AgNO 3在乙腈中的溶液吸收到由阳极支撑的电解质层上制造的钙钛矿阴极，限定了SOFC电池。 取决于阴极的厚度，可能需要重复多次阴极吸收。 浸入阴极中的溶液的量导致阴极中Ag的总最终重量百分比为约0.5％至约10％。 然后将阴极在空气中在高温下烧制以驱除乙腈并将银离子还原成金属银。 以这种方式，阴极电阻可以降低多达52％。