| Affiliation: | 1. Department of Mechanical Engineering, Universiti Teknologi PETRONAS, 32610, Seri Iskandar, Perak Darul Ridzuan, Malaysia;2. Hydrogen Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, 34129, Daejeon, Republic of Korea;3. Advanced Energy and System Engineering, University of Science and Technology, 217 Gajeong-ro, Gajeong-dong, Yuseong-gu, 34113, Daejeon, Republic of Korea;1. Department of Energy Science & Engineering, DGIST, Daegu, 42988, Republic of Korea;2. Corporate R&D, LG Chem R&D Campus, Daejeon, 34122, Republic of Korea;1. ENEA C.R. Casaccia, 00123 Rome, Italy;2. School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;3. University of Tuscia – DAFNE, 01100 Viterbo, Italy;1. Department of Energy Conversion and Storage, Technical University of Denmark, Risø Campus, 4000 Roskilde, Denmark;2. Department of Applied Science and Technology, DISAT, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;3. Edison Research & Development Center, Edison S.p.A., Trofarello (Torino), Italy;4. Department of Energy, DENERG, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;5. AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland;6. Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany;1. Center for Fuel Cell Innovation, State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. Faculty of Mechanical and Electronic Information, China University of Geosciences, Wuhan 430074, China |
| Abstract: | Solid oxide fuel cell (SOFC) is the modern eco-friendly technology of fuel cell power generation system. It generates electricity from a redox chemical reaction without producing hazardous gases. It consists of anode, cathode and electrolyte. It is operated in the form of stack connected by interconnects to boost-up power output. The recent development of low-temperature (600 °C–800 °C) brings an opportunity to use metallic interconnects over ceramics. Cr-based metallic interconnects are one of the prominent metallic interconnects. They offer chemical inertness, thermal stability, compatible coefficient of thermal expansion and highly dense structure. However, the Cr-migration towards the cathode side is the major problem in them which adversely affect the SOFCs performance. Therefore a good oxidation resistance without sacrificing electrical conductivity is required. To resolve this issue, several alloying elements and spinel coatings have experimented. These spinel coatings are the thin solid films of Mn, Co, Cu and rare earth metals. This review concluded that the Mn–Co based spinal coating showed excellent performance in reducing the Cr-migration in specially designed expensive Crofer 22 APU interconnect. However, the emerging low-cost ferritic interconnects also show their best results with Cu–Fe based spinel coating. Among them, the SUS-430 interconnect shows the equivalent performance of Crofer 22 APU interconnect after surface treatment and appropriate Cu–Fe based spinel coating. Therefore, it can replace the Crofer 22 APU interconnect on a cost basis. |
