A highly activated and integrated nanoscale interlayer of cathodes in low-temperature solid oxide fuel cells via precursor-solution electrospray method. (15th February 2019)

• Record Type: Journal Article
• Authors: Shin, Sung Soo; Kim, Jeong Hun; Li, Guangmin; Lee, Seung Yong; Son, Ji-Won; Kim, Hyoungchul; Choi, Mansoo
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 9(2019)
• Page Start: 4476
• Page End: 4483
• Publication Date: 2019-02-15
• Subjects: Nanoscale interlayer -- Electrospray -- Solid oxide fuel cells -- Composite cathodes -- Precursor solution; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.11.143
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: This study demonstrates the fabrication of a highly activated and integrated nanoscale interlayer of cathodes in low-temperature solid oxide fuel cells (SOFCs) using the precursor-solution electrospray method. Uniform, crack-free La0.6 Sr0.4 CoO3− δ (LSC) and LSC-CeO2 thin-film layers are fabricated by using optimized precursor-solution electrospray and sintering conditions. The LSC–CeO2 composite layer served as a nanoscale-cathode-functional layer (nCFL) by suppressing grain growth and increasing the number of triple-phase boundaries. The LSC nanoscale-adhesive layer (nAL) played a limited role as an adhesive layer due to a large amount of grain growth and limited triple-phase boundaries. Low-temperature SOFCs with the nAL and nCFL nanoscale interlayers showed maximum power densities of ∼1.108 and 1.150 W cm −2 at 650 °C, which were ∼13% and 18% higher, respectively, than those of a reference cell without nanoscale interlayers. Graphical abstract: Image 1 Highlights: A modified precursor-solution electrospray was used for forming nanoscale layer. This structure was applied as a highly activated and integrated interlayer of SOFC. The composite interlayer of LSC and GDC provides better performance and stability. Interlayer assisted cells resulted in peak power density of ∼1.150 W cm −2 at 650 °C.