The Rheology of Stabilised Lanthanum Strontium Cobaltite Ferrite Nanopowders in Organic Medium Applicable as Screen Printed SOFC Cathode Layers

被引：20
作者：
Burnat, D. [1 ,2 ]
Ried, P. [1 ]
Holtappels, P. [1 ]
Heel, A. [1 ]
Graule, T. [1 ]
Kata, D. [2 ]
机构：
[1] EMPA Swiss Fed Labs Mat Testing & Res, Lab High Performance Ceram Dubendorf, CH-8600 Dubendorf, Switzerland
[2] AGH Univ Sci & Technol, Dept Technol Ceram & Refractories, Fac Mat Sci & Ceram, PL-30059 Krakow, Poland
来源：
FUEL CELLS | 2010年 / 10卷 / 01期
关键词：
LSCF; Nanoparticles; Rheology; Screen Printing; Solid Oxide Fuel Cells (SOFC); OXIDE FUEL-CELLS; INTERMEDIATE TEMPERATURE SOFC; ELECTRICAL-PROPERTIES; ZIRCONIA SUSPENSIONS; COMPOSITE CATHODE; LA1-XSRXCO0.2FE0.8O3; PERFORMANCE;
D O I：
10.1002/fuce.200900014
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The production and optimisation of screen printing (SP) pastes containing La(0.58)Sr(0.42)Co(0.21)Fe(0.79)O(3-delta) and La(0.61)Sr(0.41)Co(0.19)Fe(0.79)O(3-delta) (LSCF) were investigated. The application of these nanopowders is supposed to improve the cathode's microstructure and increase its mechanical strength. Thirty seven pastes containing LSCF were carried out with variation in binders, dispersants and different particle size distribution. The rheological behaviour of these pastes was investigated. It was found that commercially available dispersant Solsperse 3000 resulted in the best suspension stability, achieving almost 55 times lower viscosity value for pastes containing 20 vol.-%, than pastes without any dispersants. The shear thinning behaviour was found to be favourable for the LSCF cathode deposition. A cathode made from the mixture of nano and submicron powder exhibits a polarisation resistance as low as 0.76 Omega cm(2) at 592 degrees C.
引用
收藏
页码：156 / 165
页数：10
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