High thermal stability of three-dimensionally ordered nano-composite cathodes for solid oxide fuel cells

Juan Li; Naiqing Zhang; Kening Sun; Zhengbin Wu

doi:10.1016/j.electacta.2015.11.063

High thermal stability of three-dimensionally ordered nano-composite cathodes for solid oxide fuel cells

Juan Li
, Naiqing Zhang
, Kening Sun^*
, Zhengbin Wu

^*Corresponding author for this work

Shenzhen Institute of Advanced Technology
Harbin Institute of Technology

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

10 Citations (Scopus)

Abstract

A non-close-packed (NCP) silica opal connected by cylindrical rods was prepared using a selective etching technique. Using sol-gel impregnation of the NCP silica opal template, La_0.8Sr_0.2MnO₃/Zr_0.84Y_0.16O₂ (LSM/YSZ) composite cathodes were fabricated for solid oxide fuel cells. The microstructure of the as-prepared cathode revealed three-dimensionally (3D) ordered hollow spheres connected by cylindrical tubes. Even after higherature sintering at 1000 °C, the 3D ordered nano-network remained stable. Electrochemical impedance spectroscopy was used to study the oxygen reduction reaction kinetics of the 3D ordered LSM/YSZ electrode. The impedance behavior was similar to that of a mixed ionic-electronic conductor, different from the behavior of traditional micro-scaled LSM/YSZ electrodes. The nanometer-scale particle size and continuous nano-network are the main reasons for this divergence in behavior.

Original language	English
Pages (from-to)	179-185
Number of pages	7
Journal	Electrochimica Acta
Volume	187
DOIs	https://doi.org/10.1016/j.electacta.2015.11.063
Publication status	Published - 1 Jan 2016
Externally published	Yes

Keywords

Oxygen reduction reaction kinetics
Silica opal
Solid oxide fuel cells
Thermal stability
Three-dimensionally ordered architecture

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10.1016/j.electacta.2015.11.063

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@article{cc8a811039ce44c78d1b897e139a76ef,

title = "High thermal stability of three-dimensionally ordered nano-composite cathodes for solid oxide fuel cells",

abstract = "A non-close-packed (NCP) silica opal connected by cylindrical rods was prepared using a selective etching technique. Using sol-gel impregnation of the NCP silica opal template, La0.8Sr0.2MnO3/Zr0.84Y0.16O2 (LSM/YSZ) composite cathodes were fabricated for solid oxide fuel cells. The microstructure of the as-prepared cathode revealed three-dimensionally (3D) ordered hollow spheres connected by cylindrical tubes. Even after higherature sintering at 1000 °C, the 3D ordered nano-network remained stable. Electrochemical impedance spectroscopy was used to study the oxygen reduction reaction kinetics of the 3D ordered LSM/YSZ electrode. The impedance behavior was similar to that of a mixed ionic-electronic conductor, different from the behavior of traditional micro-scaled LSM/YSZ electrodes. The nanometer-scale particle size and continuous nano-network are the main reasons for this divergence in behavior.",

keywords = "Oxygen reduction reaction kinetics, Silica opal, Solid oxide fuel cells, Thermal stability, Three-dimensionally ordered architecture",

author = "Juan Li and Naiqing Zhang and Kening Sun and Zhengbin Wu",

year = "2016",

month = jan,

day = "1",

doi = "10.1016/j.electacta.2015.11.063",

language = "English",

volume = "187",

pages = "179--185",

journal = "Electrochimica Acta",

issn = "0013-4686",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - High thermal stability of three-dimensionally ordered nano-composite cathodes for solid oxide fuel cells

AU - Li, Juan

AU - Zhang, Naiqing

AU - Sun, Kening

AU - Wu, Zhengbin

PY - 2016/1/1

Y1 - 2016/1/1

N2 - A non-close-packed (NCP) silica opal connected by cylindrical rods was prepared using a selective etching technique. Using sol-gel impregnation of the NCP silica opal template, La0.8Sr0.2MnO3/Zr0.84Y0.16O2 (LSM/YSZ) composite cathodes were fabricated for solid oxide fuel cells. The microstructure of the as-prepared cathode revealed three-dimensionally (3D) ordered hollow spheres connected by cylindrical tubes. Even after higherature sintering at 1000 °C, the 3D ordered nano-network remained stable. Electrochemical impedance spectroscopy was used to study the oxygen reduction reaction kinetics of the 3D ordered LSM/YSZ electrode. The impedance behavior was similar to that of a mixed ionic-electronic conductor, different from the behavior of traditional micro-scaled LSM/YSZ electrodes. The nanometer-scale particle size and continuous nano-network are the main reasons for this divergence in behavior.

AB - A non-close-packed (NCP) silica opal connected by cylindrical rods was prepared using a selective etching technique. Using sol-gel impregnation of the NCP silica opal template, La0.8Sr0.2MnO3/Zr0.84Y0.16O2 (LSM/YSZ) composite cathodes were fabricated for solid oxide fuel cells. The microstructure of the as-prepared cathode revealed three-dimensionally (3D) ordered hollow spheres connected by cylindrical tubes. Even after higherature sintering at 1000 °C, the 3D ordered nano-network remained stable. Electrochemical impedance spectroscopy was used to study the oxygen reduction reaction kinetics of the 3D ordered LSM/YSZ electrode. The impedance behavior was similar to that of a mixed ionic-electronic conductor, different from the behavior of traditional micro-scaled LSM/YSZ electrodes. The nanometer-scale particle size and continuous nano-network are the main reasons for this divergence in behavior.

KW - Oxygen reduction reaction kinetics

KW - Silica opal

KW - Solid oxide fuel cells

KW - Thermal stability

KW - Three-dimensionally ordered architecture

UR - https://www.scopus.com/pages/publications/84947745399

U2 - 10.1016/j.electacta.2015.11.063

DO - 10.1016/j.electacta.2015.11.063

M3 - Article

AN - SCOPUS:84947745399

SN - 0013-4686

VL - 187

SP - 179

EP - 185

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

High thermal stability of three-dimensionally ordered nano-composite cathodes for solid oxide fuel cells

Abstract

Keywords

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