Influence of Electrophoretic Deposition (EPD) Voltage on SOFC Interconnect Morphology

Abstract

Solid oxide fuel cell has become one of the interest in the sustainable energy field. In order to improve the efficiency of a solid oxide fuel cell (SOFC), the interconnect must be coated with a protective coating of (MnCO)3O4 spinel coated stainless steel. Commercial manganese cobalt (MnCO)3O4 was used as a protective coating on ferritic stainless steel in this study using the electrophoretic deposition (EPD) coating technique. This article examines the impact of voltage deposition towards morphological characteristics. The goals of these studies are to find the best interconnect coating parameter while experimenting with voltage deposition. The spinel coated interconnect (MnCO)3O4 was studied using Elemental Energy Dispersive X-ray Spectroscopy (EDS). The surface morphology and coating thickness are examined using a Scanning Electron Microscope (SEM). X-ray diffraction (XRD) is used to determine the phase of the spinel coated interconnect. The EPD coating technique for (MnCO)3O4 spinel coated interconnect is carried out in an aqueous suspension with 30V and 40V with coating durations of 20s, 30s, 40s, 50s, and 60s. By observing the deposition morphology and thickness coating at 30V and 40V, the best covering parameter for interconnect is 30V, 40s which fulfil the interconnect requirement.

Development of Mn-Co and Mn-Co-CeO2 Coatings on Crofer 22 APU Steel for Solid Oxide Fuel Cell Interconnects

“…[19][20][21][22] Mn-Co spinel coatings have been developed using various methods, including pack cementation, 23 physical vapor deposition, 24 electrodeposition, 25 plasma spraying, 26 magnetron sputtering, 27 and electrophoretic deposition. 28 Adding reactive element oxide particles like La 2 O 3 , ZrO 2 , and Y 2 O 3 to spinel coatings improves their adhesion to the substrate and enhances protective properties against oxidation at high temperatures. [29][30][31] Regarding the effect of cerium oxide particles on spinel coatings, You 32 et al demonstrated that despite reducing the area specific resistance (ASR) of 430 stainless steel interconnect plates, the spinel coating NiFe 2 O 4 has little effect on the growth of chromia scale.…”