title: Highly efficient layer-by-layer-assisted infiltration for high-performance and cost-effective fabrication of nanoelectrodes.
abstract: We present a novel cathode fabrication technique for improved performance and production efficiency of SOFCs based on an infiltration method assisted by layer-by-layer (LbL) assembly of polyelectrolytes. Preparation of the electrode with LbL-assisted infiltration leads to a 6.5-fold reduction in the electrode fabrication time while providing uniform and small formation of Pr0.7Sr0.3CoO3-δ (PSC) particles on the electrode. The increased surface area by 24.5% and number of active sites of the prepared electrode exhibits superior electrochemical performance up to 36.1% while preserving the electrical properties of the electrode. Because of its versatility and tenability, the LbL-assisted infiltration process may become a new route for fabrication of composite electrodes for other energy storage and conversion devices.
authors.affiliation: Department of Energy Engineering, §UNIST Central Research Facilities (UCRF), Department of Mechanical and Advanced Materials Engineering, and #Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Choi
authors.forename: Sihyuk
authors.initials: S
authors.lastname: Choi
authors.forename: Hu Young
authors.initials: HY
authors.lastname: Jeong
authors.forename: Meilin
authors.initials: M
authors.lastname: Liu
authors.forename: Byeong-Su
authors.initials: BS
authors.lastname: Kim
authors.forename: Guntae
authors.initials: G
authors.lastname: Kim
keywords: composite electrode; infiltration; layer-by-layer assembly; oxygen reduction reaction; solid oxide fuel cell (SOFC)