Electrophoretic Deposition of Cu-doped Mn-Co Spinel Oxide Nanostructured Coatings on SUS 430 Alloy for Solid Oxide Fuel Cell Interconnect Application

Doping transition metals into Mn-Co spinel oxide (MCO) could improve conductivity and bonding of coated interconnects applied for solid oxide fuel cells. In the present study, Cux(Mn, Co)3-xO4 (x=0, 0.2 and 0.4) nanostructured coatings were deposited on SUS 430 alloy via electrophoretic deposition. Cathodic electrophoretic deposition was carried out at constant DC voltage of 60 for min. The Cu-doped MCO coating acted as barrier for evaporation and migration of Cr-containing species from interconnect which is effective in preventing chromium volatilization from interconnect alloys in solid oxide fuel cells. The phase and microstructure of Cu-doped MCO coatings were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) equipped with EDS analysis. Long-term non-isothermal oxidation experiments for area specific resistance (ASR) measurements were investigated. The results of ASR test showed that doping of Cu as transition metal dopant into MCO improves electrical conductivity after 1000 oxidation in 800˚C.

Electrophoretic Deposition of Cu-doped Mn-Co Spinel Oxide Nanostructured Coatings on SUS 430 Alloy for Solid Oxide Fuel Cell Interconnect Application Keywords:

Solid Oxide Fuel Cell , Interconnect , Spinel , Copper , Electrophoretic Deposition , Oxidation