Compatibility of La2NiO4 cathodes with LaGaO3 electrolytes: A computational approach

Nuri Solak; Matvei Zinkevich; Fritz Aldinger

doi:10.1016/j.ssi.2006.05.029

Compatibility of La₂NiO₄ cathodes with LaGaO₃ electrolytes: A computational approach

Nuri Solak^*
, Matvei Zinkevich
, Fritz Aldinger

^*Corresponding author for this work

University of Stuttgart

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

16 Citations (Scopus)

Abstract

The available literature information on the phase equilibria for the La-Ga-Ni-O system has been assessed. Based on the known thermodynamics of boundary oxygen containing systems, La-Ni-O, La-Ga-O, and Ga-Ni-O, and experimental data on phase equilibria in the La₂O₃-Ga₂O₃-NiO quasiquaternary system, models have been defined to describe the Gibbs energy of the individual phases. The model parameters have been optimized by least-squares fit to selected experimental information using the CALPHAD-method (Calculation of Phase Diagrams). Chemical potential diagrams of the systems representing fabrications and cathode-anode side operation conditions of LaGaO₃-based solid oxide fuel cells (SOFC) were calculated. It has been determined that, neither in fuel cell fabrication conditions nor in operation conditions un-doped LaGaO₃ electrolytes and La₂NiO₄ cathodes are stable in equilibrium with each other but will react to form another phases.

Original language	English
Pages (from-to)	2139-2142
Number of pages	4
Journal	Solid State Ionics
Volume	177
Issue number	19-25 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.ssi.2006.05.029
Publication status	Published - 15 Oct 2006
Externally published	Yes

Funding

One of the authors (N.S.) is grateful to the International Max-Planck Research School for Advanced Materials (IMPRS-AM) for financial support.

Funders
International Max-Planck Research School for Advanced Materials

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

LaGaO
LaNiO
Ni
SOFC
Thermodynamic modeling

Access to Document

10.1016/j.ssi.2006.05.029

Cite this

@article{51b675a1fb9743ef8892231982fe80f7,

title = "Compatibility of La2NiO4 cathodes with LaGaO3 electrolytes: A computational approach",

abstract = "The available literature information on the phase equilibria for the La-Ga-Ni-O system has been assessed. Based on the known thermodynamics of boundary oxygen containing systems, La-Ni-O, La-Ga-O, and Ga-Ni-O, and experimental data on phase equilibria in the La2O3-Ga2O3-NiO quasiquaternary system, models have been defined to describe the Gibbs energy of the individual phases. The model parameters have been optimized by least-squares fit to selected experimental information using the CALPHAD-method (Calculation of Phase Diagrams). Chemical potential diagrams of the systems representing fabrications and cathode-anode side operation conditions of LaGaO3-based solid oxide fuel cells (SOFC) were calculated. It has been determined that, neither in fuel cell fabrication conditions nor in operation conditions un-doped LaGaO3 electrolytes and La2NiO4 cathodes are stable in equilibrium with each other but will react to form another phases.",

keywords = "LaGaO, LaNiO, Ni, SOFC, Thermodynamic modeling",

author = "Nuri Solak and Matvei Zinkevich and Fritz Aldinger",

year = "2006",

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doi = "10.1016/j.ssi.2006.05.029",

language = "English",

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journal = "Solid State Ionics",

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TY - JOUR

T1 - Compatibility of La2NiO4 cathodes with LaGaO3 electrolytes

T2 - A computational approach

AU - Solak, Nuri

AU - Zinkevich, Matvei

AU - Aldinger, Fritz

PY - 2006/10/15

Y1 - 2006/10/15

N2 - The available literature information on the phase equilibria for the La-Ga-Ni-O system has been assessed. Based on the known thermodynamics of boundary oxygen containing systems, La-Ni-O, La-Ga-O, and Ga-Ni-O, and experimental data on phase equilibria in the La2O3-Ga2O3-NiO quasiquaternary system, models have been defined to describe the Gibbs energy of the individual phases. The model parameters have been optimized by least-squares fit to selected experimental information using the CALPHAD-method (Calculation of Phase Diagrams). Chemical potential diagrams of the systems representing fabrications and cathode-anode side operation conditions of LaGaO3-based solid oxide fuel cells (SOFC) were calculated. It has been determined that, neither in fuel cell fabrication conditions nor in operation conditions un-doped LaGaO3 electrolytes and La2NiO4 cathodes are stable in equilibrium with each other but will react to form another phases.

AB - The available literature information on the phase equilibria for the La-Ga-Ni-O system has been assessed. Based on the known thermodynamics of boundary oxygen containing systems, La-Ni-O, La-Ga-O, and Ga-Ni-O, and experimental data on phase equilibria in the La2O3-Ga2O3-NiO quasiquaternary system, models have been defined to describe the Gibbs energy of the individual phases. The model parameters have been optimized by least-squares fit to selected experimental information using the CALPHAD-method (Calculation of Phase Diagrams). Chemical potential diagrams of the systems representing fabrications and cathode-anode side operation conditions of LaGaO3-based solid oxide fuel cells (SOFC) were calculated. It has been determined that, neither in fuel cell fabrication conditions nor in operation conditions un-doped LaGaO3 electrolytes and La2NiO4 cathodes are stable in equilibrium with each other but will react to form another phases.

KW - LaGaO

KW - LaNiO

KW - Ni

KW - SOFC

KW - Thermodynamic modeling

UR - https://www.scopus.com/pages/publications/33750034157

U2 - 10.1016/j.ssi.2006.05.029

DO - 10.1016/j.ssi.2006.05.029

M3 - Article

AN - SCOPUS:33750034157

SN - 0167-2738

VL - 177

SP - 2139

EP - 2142

JO - Solid State Ionics

JF - Solid State Ionics

IS - 19-25 SPEC. ISS.

ER -