Improved oxygen surface exchange kinetics at grain boundaries in nanocrystalline yttria-stabilized zirconia
- Authors
- Park, Joong Sun; Holme, Timothy P.; Shim, Joon Hyung; Prinz, Fritz B.
- Issue Date
- 9월-2012
- Publisher
- CAMBRIDGE UNIV PRESS
- Citation
- MRS COMMUNICATIONS, v.2, no.3, pp.107 - 111
- Indexed
- SCOPUS
- Journal Title
- MRS COMMUNICATIONS
- Volume
- 2
- Number
- 3
- Start Page
- 107
- End Page
- 111
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/107558
- DOI
- 10.1557/mrc.2012.18
- ISSN
- 2159-6859
- Abstract
- Quantum simulations of oxygen incorporation at a Sigma 5 grain boundary in yttria-stabilized zirconia (YSZ), a common solid oxide fuel cells (SOFCs) electrolyte, show that the incorporation energy is reduced compared with YSZ with no grain boundaries. The simulation results are supported by electrochemical impedance spectroscopy (EIS) measurements conducted on a single crystalline YSZ substrate with nano-granular interlayered YSZ. EIS results showed that single crystalline YSZ membranes with nanogranular surface (i.e., high grain boundary densities) exhibit small electrode impedances than the reference single crystalline YSZ. The 20-nm-thick nanogranular YSZ interlayer was fabricated by atomic layer deposition and the performance for SOFCs with nanograined interlayer was increased by factor of 2 at operating temperatures between 350 and 450 degrees C.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.