Development of a Versatile, High-Performance Solid Oxide Fuel Cell Stack Technology. (10th July 2019)

• Record Type: Journal Article
• Authors: Minh, Nguyen; Lee, Yoon Ho; Tran, Tuyen Q.; Ren, Haowen; Fullerton, Eric; Wu, Erik; Meng, Ying Shirley
• Is Part Of: ECS transactions. Volume 91:Number 1(2019)
• Page Start: 133
• Page End: 138
• Publication Date: 2019-07-10
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/09101.0133ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : A high-performance solid oxide fuel cell (SOFC) stack technology is being developed, based on a design concept that incorporates prime-surface metallic interconnects with the versatility of stacking different types of single cells (sintered cells or metal-supported cells). A preliminary design of the prime-surface interconnect based on an egg-carton shape configuration has been advanced for this stack concept. Laboratory-scale prime-surface interconnects have successfully been fabricated by stamping and evaluated for mechanical loading, flow distribution and current collection properties. A process based on sputtering has been developed for fabricating supported thin-film (several micrometers thick) cells for this stack technology. Fabricated thin-film cells have shown desirable structural characteristics and exceptional performance on different fuels at reduced temperatures (550º-650ºC). Sputtered cells (with yttria stabilized zirconia (YSZ) for the electrolyte, gadolinia-doped ceria (GDC) for the electrolyte/cathode interlayer, nickel-YSZ for the anode and lanthanum strontium cobalt iron perovskite (LSCF)–YSZ for the cathode) have exhibited peak power densities of ~1.7 W/cm 2 and ~2.1 W/cm 2 with hydrogen fuel and air at operating temperatures of 600ºC and 650ºC, respectively.