@article{ce8f74376a5b4810a305d88fe632e5ae,
title = "Surface Tuning of Solid Oxide Fuel Cell Cathode by Atomic Layer Deposition",
abstract = "Atomic layer deposition (ALD) is a powerful tool for nanoscale film deposition. It can uniformly deposit films at a monolayer level even in complex 3D structures, while the deposition temperature is relatively low with its potential scalability. In this work, surface tuning of solid oxide fuel cell (SOFC) cathodes is successfully demonstrated by modifying the surface of La0.6Sr0.4Co0.2Fe0.8O3− δ (LSCF) with nanoscale lanthanum strontium cobaltite (LSC) using ALD. The ALD-LSC surface-tuning layer can enhance the charge transfer kinetics at the cathode surface, while the backbone LSCF cathode provides a means for ionic and electronic transport. Microstructural analysis shows that the ALD-LSC on LSCF has excellent step coverage, which is enabled by the conformal characteristic of the ALD process. It is found that the electrochemical performance of SOFCs can be enhanced enormously by surface tuning of the cathodes with nanoscale LSC film corresponding to 1–12 nm. Using density functional theory calculations, the enhanced catalytic activity of the surface-tuned SOFC cathode using ALD-LSC could be confirmed. This result demonstrates the possibility of nanoscale surface tuning of SOFC cathodes by using the ALD process to improve the surface activity.",
keywords = "atomic layer deposition, nanoscale oxide, solid oxide fuel cells, surface tuning",
author = "Choi, {Hyung Jong} and Kiho Bae and Steffen Grieshammer and Han, {Gwon Deok} and Park, {Suk Won} and Kim, {Jun Woo} and Jang, {Dong Young} and Junmo Koo and Son, {Ji Won} and Manfred Martin and Shim, {Joon Hyung}",
note = "Funding Information: This research was supported by Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (No. 2018M3A7B8061661). H.J.C. thanks RWTH Aachen University for a fellowship within the Research Fellowships Korea program and J{\"u}lich Aachen Research Alliance High Performance Computing (JARA-HPC) for granting computing time within the projects jara0035 and rwth0097. Dr. Peter C. Schmidt (emeritus professor of Technical University of Darmstadt, Germany) is acknowledged for support modeling the amorphous materials. The authors thank Dr. Clement Lansalot-Matras and Dr. Wontae Noh (Air Liquide Laboratories Korea) for providing strontium and lanthanum precursors and discussion of the ALD La2O3 and SrO processes. The authors acknowledge Up Chemical Co., Ltd. for supplying the cobalt precursor. Funding Information: This research was supported by Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (No. 2018M3A7B8061661). H.J.C. thanks RWTH Aachen University for a fellowship within the Research Fellowships Korea program and J?lich Aachen Research Alliance High Performance Computing (JARA-HPC) for granting computing time within the projects jara0035 and rwth0097. Dr. Peter C. Schmidt (emeritus professor of Technical University of Darmstadt, Germany) is acknowledged for support modeling the amorphous materials. The authors thank Dr. Clement Lansalot-Matras and Dr. Wontae Noh (Air Liquide Laboratories Korea) for providing strontium and lanthanum precursors and discussion of the ALD La2O3 and SrO processes. The authors acknowledge Up Chemical Co., Ltd. for supplying the cobalt precursor. Publisher Copyright: {\textcopyright} 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2018",
month = nov,
day = "26",
doi = "10.1002/aenm.201802506",
language = "English",
volume = "8",
journal = "Advanced Energy Materials",
issn = "1614-6832",
publisher = "Wiley-VCH Verlag",
number = "33",
}
