Enhanced reliability of planar-type solid oxide fuel cell stack incorporating leakage gas induction channels. (14th April 2020)

• Record Type: Journal Article
• Authors: Kim, Sungmin; Jang, Inyoung; Kim, Chanho; Lee, Hyungjun; Song, Taeseup; Yoon, Heesung; Paik, Ungyu
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 20(2020)
• Page Start: 11834
• Page End: 11841
• Publication Date: 2020-04-14
• Subjects: Planar type solid oxide fuel cell stack -- Gasket sealant -- Leakage gas induction channel; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.02.128
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Planar type solid oxide fuel cell stacks have been studied for use as commercial products because of their high energy density and environment-friendly operation. They employ a gasket as a sealant as it enables easy assembly and repair. However, its imperfect sealing property, detrimental to long-term operation, has limited its introduction. Here, a stack design with a gasket sealant including a leakage gas induction channel is developed. The leakage gas induction channel within the gasket sealant prevents gas leakage of fuel and air to the opposite electrode and ensures the stack's stable operation. The stack design's reliability is confirmed via a heating-cycle test and an open circuit voltage to a 0.7 V voltage control test. In-situ gas chromatography analysis shows that the diffusion of gases effectively reduces by releasing them outside the stack through the leakage gas induction channel. Highlights: Stack design with a gasket sealant and a leakage gas induction channel is developed. LGIC reduces diffusion of gases as they are released outside the stack. Stack design was used to fabricate single-cell, two-cell, and five-cell stacks. The design can reduce cell fracture during assembly of solid oxide fuel cell stacks.