Abstract
Quantum simulations of oxygen incorporation at a Σ5 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 nanogranular 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 °C.
| Original language | English |
|---|---|
| Pages (from-to) | 107-111 |
| Number of pages | 5 |
| Journal | MRS Communications |
| Volume | 2 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2012 |
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ASJC Scopus subject areas
- Materials Science(all)
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Improved oxygen surface exchange kinetics at grain boundaries in nanocrystalline yttria-stabilized zirconia. / Park, Joong Sun; Holme, Timothy P.; Shim, Joon Hyung; Prinz, Fritz B.
In: MRS Communications, Vol. 2, No. 3, 2012, p. 107-111.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Improved oxygen surface exchange kinetics at grain boundaries in nanocrystalline yttria-stabilized zirconia
AU - Park, Joong Sun
AU - Holme, Timothy P.
AU - Shim, Joon Hyung
AU - Prinz, Fritz B.
PY - 2012
Y1 - 2012
N2 - Quantum simulations of oxygen incorporation at a Σ5 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 nanogranular 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 °C.
AB - Quantum simulations of oxygen incorporation at a Σ5 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 nanogranular 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 °C.
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U2 - 10.1557/mrc.2012.18
DO - 10.1557/mrc.2012.18
M3 - Article
AN - SCOPUS:85011457192
VL - 2
SP - 107
EP - 111
JO - MRS Communications
JF - MRS Communications
SN - 2159-6859
IS - 3
ER -