Corrosion-resistant coating for cathode current collector and wet-seal area of molten carbonate fuel cells. (14th June 2018)

• Record Type: Journal Article
• Authors: Kim, MinJoong; Youn, JuYoung; Lim, JeongHoon; Eom, KwangSup; Cho, EunAe; Kwon, HyukSang
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 24(2018)
• Page Start: 11363
• Page End: 11371
• Publication Date: 2018-06-14
• Subjects: Molten carbonate fuel cell -- Cathode current collector -- Wet-seal area -- Corrosion-resistant coating -- Electrodeposition -- Mechanical cladding; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.02.196
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: High-temperature corrosion of metallic bipolar plates is a main problem to limit system reliability of molten carbonate fuel cells (MCFCs). In particular, cathode current collector (CCC) and wet-seal area in the bipolar plates suffer severe corrosion during MCFCs operation. Herein, we are trying to explore facile and cost-effective coating materials and methods to enhance corrosion resistance of CCC and wet-seal area of MCFCs. Cobalt (Co) layer was coated by using electrodeposition method for CCC, and aluminum (Al) layer was coated by using mechanical cladding method for wet-seal area. Co and Al layers were transformed into in-situ lithiated oxides, which are LiCoO2 and LiAlO2, by reacting with electrolytes without detachment. These in-situ formed oxides efficiently impede formation and growth of corrosion scales by preventing permeation of electrolytes. We believe that Co electrodeposition and Al cladding would be suitable and practical methods for making protective layers to enhance corrosion resistance of CCC and wet-seal area in the MCFCs bipolar plates. Highlights: Co layer was electrodeposited for corrosion-resistant coating of MCFCs CCC. Al layer was cladded for corrosion-resistant coating of MCFCs wet-seal area. Co and Al layers were in-situ lithiated into LiCoO2 and LiAlO2 without detachment. These in-situ lihiated layers efficiently impede formation and growth of corrosion scales. Electrodeposition and cladding can make protective layers of CCC and wet-seal area.