Low-temperature electrochemical characterization of dense ultra-thin lanthanum strontium cobalt ferrite (La0.6Sr0.4Co0.8Fe0.2O3) cathodes synthesized by RF-sputtering on nanoporous alumina-supported Y-doped zirconia membranes

Hui Xiong; Bo Kuai Lai; Alex C. Johnson; Shriram Ramanathan

doi:10.1016/j.jpowsour.2009.04.024

Low-temperature electrochemical characterization of dense ultra-thin lanthanum strontium cobalt ferrite (La_0.6Sr_0.4Co_0.8Fe_0.2O₃) cathodes synthesized by RF-sputtering on nanoporous alumina-supported Y-doped zirconia membranes

Hui Xiong
, Bo Kuai Lai
, Alex C. Johnson
, Shriram Ramanathan

Micron School of Materials Science and Engineering

Harvard University

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

Dense ultra-thin nanocrystalline La_0.6Sr_0.4Co_0.8Fe_0.2O₃ (LSCF) films with thickness of ∼50 nm, have been sputtered on nanoporous anodic alumina-supported nanocrystalline thin film yttria-stabilized zirconia and patterned by photolithography into microelectrodes. This approach enables low-temperature (425-550 °C) electrochemical properties of dense ultra-thin nanocrystalline LSCF to be characterized. The results reveal that the electrochemical resistance of nanocrystalline ultra-thin LSCF is dominated by the oxygen surface exchange reaction at the electrode surface with an activation energy of 1.1 eV. Area-specific resistance of LSCF was obtained and the results are of potential relevance to utilizing nanostructured oxide cathodes for micro-SOFCs operated at low temperatures.

Original language	English
Pages (from-to)	589-592
Number of pages	4
Journal	Journal of Power Sources
Volume	193
Issue number	2
DOIs	https://doi.org/10.1016/j.jpowsour.2009.04.024
State	Published - 5 Sep 2009

Keywords

Area-specific resistances
Cathode
Lanthanum stronium cobalt ferrite
Microelectrode
Nanocrystalline
Solid oxide fuel cell
Ultra-thin films

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Xiong, H., Lai, B. K., Johnson, A. C., & Ramanathan, S. (2009). Low-temperature electrochemical characterization of dense ultra-thin lanthanum strontium cobalt ferrite (La_0.6Sr_0.4Co_0.8Fe_0.2O₃) cathodes synthesized by RF-sputtering on nanoporous alumina-supported Y-doped zirconia membranes. Journal of Power Sources, 193(2), 589-592. https://doi.org/10.1016/j.jpowsour.2009.04.024

@article{57d02402701a406e862614b1a35f4d52,

title = "Low-temperature electrochemical characterization of dense ultra-thin lanthanum strontium cobalt ferrite (La0.6Sr0.4Co0.8Fe0.2O3) cathodes synthesized by RF-sputtering on nanoporous alumina-supported Y-doped zirconia membranes",

abstract = "Dense ultra-thin nanocrystalline La0.6Sr0.4Co0.8Fe0.2O3 (LSCF) films with thickness of ∼50 nm, have been sputtered on nanoporous anodic alumina-supported nanocrystalline thin film yttria-stabilized zirconia and patterned by photolithography into microelectrodes. This approach enables low-temperature (425-550 °C) electrochemical properties of dense ultra-thin nanocrystalline LSCF to be characterized. The results reveal that the electrochemical resistance of nanocrystalline ultra-thin LSCF is dominated by the oxygen surface exchange reaction at the electrode surface with an activation energy of 1.1 eV. Area-specific resistance of LSCF was obtained and the results are of potential relevance to utilizing nanostructured oxide cathodes for micro-SOFCs operated at low temperatures.",

keywords = "Area-specific resistances, Cathode, Lanthanum stronium cobalt ferrite, Microelectrode, Nanocrystalline, Solid oxide fuel cell, Ultra-thin films",

author = "Hui Xiong and Lai, \{Bo Kuai\} and Johnson, \{Alex C.\} and Shriram Ramanathan",

year = "2009",

month = sep,

day = "5",

doi = "10.1016/j.jpowsour.2009.04.024",

language = "English",

volume = "193",

pages = "589--592",

number = "2",

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Xiong, H, Lai, BK, Johnson, AC & Ramanathan, S 2009, 'Low-temperature electrochemical characterization of dense ultra-thin lanthanum strontium cobalt ferrite (La_0.6Sr_0.4Co_0.8Fe_0.2O₃) cathodes synthesized by RF-sputtering on nanoporous alumina-supported Y-doped zirconia membranes', Journal of Power Sources, vol. 193, no. 2, pp. 589-592. https://doi.org/10.1016/j.jpowsour.2009.04.024

Low-temperature electrochemical characterization of dense ultra-thin lanthanum strontium cobalt ferrite (La_0.6Sr_0.4Co_0.8Fe_0.2O₃) cathodes synthesized by RF-sputtering on nanoporous alumina-supported Y-doped zirconia membranes. / Xiong, Hui; Lai, Bo Kuai; Johnson, Alex C. et al.
In: Journal of Power Sources, Vol. 193, No. 2, 05.09.2009, p. 589-592.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Low-temperature electrochemical characterization of dense ultra-thin lanthanum strontium cobalt ferrite (La0.6Sr0.4Co0.8Fe0.2O3) cathodes synthesized by RF-sputtering on nanoporous alumina-supported Y-doped zirconia membranes

AU - Xiong, Hui

AU - Lai, Bo Kuai

AU - Johnson, Alex C.

AU - Ramanathan, Shriram

PY - 2009/9/5

Y1 - 2009/9/5

N2 - Dense ultra-thin nanocrystalline La0.6Sr0.4Co0.8Fe0.2O3 (LSCF) films with thickness of ∼50 nm, have been sputtered on nanoporous anodic alumina-supported nanocrystalline thin film yttria-stabilized zirconia and patterned by photolithography into microelectrodes. This approach enables low-temperature (425-550 °C) electrochemical properties of dense ultra-thin nanocrystalline LSCF to be characterized. The results reveal that the electrochemical resistance of nanocrystalline ultra-thin LSCF is dominated by the oxygen surface exchange reaction at the electrode surface with an activation energy of 1.1 eV. Area-specific resistance of LSCF was obtained and the results are of potential relevance to utilizing nanostructured oxide cathodes for micro-SOFCs operated at low temperatures.

AB - Dense ultra-thin nanocrystalline La0.6Sr0.4Co0.8Fe0.2O3 (LSCF) films with thickness of ∼50 nm, have been sputtered on nanoporous anodic alumina-supported nanocrystalline thin film yttria-stabilized zirconia and patterned by photolithography into microelectrodes. This approach enables low-temperature (425-550 °C) electrochemical properties of dense ultra-thin nanocrystalline LSCF to be characterized. The results reveal that the electrochemical resistance of nanocrystalline ultra-thin LSCF is dominated by the oxygen surface exchange reaction at the electrode surface with an activation energy of 1.1 eV. Area-specific resistance of LSCF was obtained and the results are of potential relevance to utilizing nanostructured oxide cathodes for micro-SOFCs operated at low temperatures.

KW - Area-specific resistances

KW - Cathode

KW - Lanthanum stronium cobalt ferrite

KW - Microelectrode

KW - Nanocrystalline

KW - Solid oxide fuel cell

KW - Ultra-thin films

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DO - 10.1016/j.jpowsour.2009.04.024

M3 - Article

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JO - Journal of Power Sources

JF - Journal of Power Sources

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