Large area electrolyte coating through surface and interface engineering in roll-to-roll slot-die coating process

被引:13
|
作者
Lee, Jongsu [1 ]
Kim, Seongyong [2 ]
Lee, Changwoo [3 ]
机构
[1] Konkuk Univ, Dept Mech Design & Prod Engn, Seoul 143701, South Korea
[2] Changwon Natl Univ, Dept Mech Engn, Changwon Si 641773, Gyeongsangnam D, South Korea
[3] Konkuk Univ, Dept Mech Engn, Seoul 143701, South Korea
关键词
Interface; Capillary number; Contact angle; Roll-to-roll; Slot-die coating; OXIDE FUEL-CELL; THIN; CATHODES; DESIGN; MICROSTRUCTURE; OPTIMIZATION; PERFORMANCE; FABRICATION; ANODE; FLOW;
D O I
10.1016/j.jiec.2019.04.011
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We analyzed the dynamics of ink at the liquid-air interface of coating bead, and at the interface between the substrate and wet coated ink in a roll-to-roll slot die coating. Using these studies, stable coating region according to the ink viscosity, flow rate, and coating gap was determined. Mathematical models to predict the geometry of the coated layer according to the flow rate, ink viscosity and contact angle between the substrate and ink were obtained. Using the analysis results, a large area yttrium-stabilized zirconia layer of thickness 15.44 mu m and surface roughness 1.13 mu m without surface flaws was fabricated, and used as the electrolyte layer in the fabrication of the solid oxide fuel cells. The fabricated cells have the open circuit voltages close to the theoretical values based on Nernst equation in various temperatures, which shows that the YSZ electrolyte was sufficiently dense to gas-tightness. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:443 / 449
页数:7
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