Surface Modification of NiFe Anode-Support for Thin-Film Solid-Oxide Fuel Cell (Supporting Information)

A dense NiO-Fe2O3 (NiFe) pellet has been developed as a potential anode-support for thin-film solid oxide fuel cells (SOFCs). However, preparation of dense NiFe is very challenging. Hole-formed NiFe pellets or porous NiFe pellets are frequently formed, which cannot be used as a support (substrate) for thin-film SOFCs. Therefore, this hole-formed NiFe support is simply wasted. In this report, we attempt to re-qualify this NiFe support to be a valuable substrate, which can be used for fabricating thin-film SOFCs. By deposition of smaller NiFe particles to cover the hole-formed NiFe support, the surface of this NiFe pellet is modified. Large holes on the surface disappear. The newly formed NiFe support can be used for fabricating a single cell with La0.9Sr0.1Ga0.8Mg0.2O3−δ as thin-film electrolyte operated at intermediate temperature. Maximum power density generated from this cell is 0.45, 0.86 and 1.28 W cm−2 at 873, 923 and 973 K, respectively.

一种致密的NiO-Fe2O3（NiFe）颗粒已被开发为薄膜固体氧化物燃料电池（SOFCs）的潜在阳极支撑材料。然而，致密NiFe的制备极具挑战性。孔洞形成的NiFe颗粒或多孔NiFe颗粒经常生成，这些颗粒无法用作薄膜SOFCs的支撑（基底）。因此，这种孔洞形成的NiFe支撑材料被简单地浪费了。在本报告中，我们试图重新评估这种NiFe支撑材料，使其成为一种有价值的基底，可用于制备薄膜SOFCs。通过沉积较小的NiFe颗粒以覆盖孔洞形成的NiFe支撑材料，该NiFe颗粒的表面得到改性。表面的大孔洞消失。新形成的NiFe支撑材料可用于制备单电池，该电池以La0.9Sr0.1Ga0.8Mg0.2O3−δ作为薄膜电解质，在中间温度下运行。该电池在873K、923K和973K温度下产生的最大功率密度分别为0.45、0.86和1.28 W cm−2。