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Synthesis and Evaluation of the A–site Deficient Perovskite La0.65Sr0.3Cr0.85Ni0.15O3-δ as Fuel Electrode for High Temperature Co–electrolysis Enhanced by In Situ Exsolution of Ni Nanoparticles.

Amaya Duenas, Diana Maria and Chen, Guoxing and Weidenkaff, Anke and Sata, Noriko and Han, Feng and Schiller, Günter and Costa, Rémi and Friedrich, Kaspar Andreas (2019) Synthesis and Evaluation of the A–site Deficient Perovskite La0.65Sr0.3Cr0.85Ni0.15O3-δ as Fuel Electrode for High Temperature Co–electrolysis Enhanced by In Situ Exsolution of Ni Nanoparticles. ECS Transactions, 91 (1), pp. 1751-1760. Electrochemical Society, Inc.. doi: 10.1149/09101.1751ecst. ISBN 1938-5862. ISSN 1938-5862.

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Official URL: https://www.electrochem.org/

Abstract

In this work, we focused on the lanthanum strontium chromite (LSC) matrix with the purpose to partially substitute the B-site with an electrocatalytic reducible transition metal that could be exsolved in situ. Therefore, nickel was considered at a substitution level of 15%. In addition, an A-site deficiency was formulated in order to enhance the exsolution capability of the electrocatalyst. A precursor was synthesized by wet-chemical method and further calcined in air. Single phase was obtained with the formulation La0.65Sr0.3Cr0.85Ni0.15O3-δ (L65SCN) which was characterized by X–ray diffraction (XRD) and Rietveld refinement analyses. Exsolution was investigated by means of thermogravimetric analysis (TGA) under reducing conditions and temperature-programmed reduction (TPR). Scanning electron microscopy (SEM) was used to study the particle morphology and its evolution. Ni particle exsolution was observed after exposure to a reducing atmosphere. The behaviour of the L65SCN perovskite was compared with the stoichiometric La0.70Sr0.3Cr0.85Ni0.15O3-δ (L70SCN). Aiming at evaluating the electrochemical performance, electrolyte-supported cells were manufactured by screen printing and sintering of composite L65SCN/CGO as fuel electrode and La0.58Sr0.4Fe0.8Co0.2O3-δ (LSCF) as air electrode on CGO-3YSZ-CGO substrates. The produced cells were tested in electrolysis and co–electrolysis mode and characterized by means of Electrochemical Impedance Spectroscopy (EIS) and polarization curves. Results will be presented with the perspective of SOEC applications.

Item URL in elib:https://elib.dlr.de/134749/
Document Type:Article
Title:Synthesis and Evaluation of the A–site Deficient Perovskite La0.65Sr0.3Cr0.85Ni0.15O3-δ as Fuel Electrode for High Temperature Co–electrolysis Enhanced by In Situ Exsolution of Ni Nanoparticles.
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Amaya Duenas, Diana MariaDiana.AmayaDuenas (at) dlr.deUNSPECIFIED
Chen, GuoxingInstitute of Materials and Earth Sciences Technische Universität DarmstadtUNSPECIFIED
Weidenkaff, AnkeInstitute of Materials and Earth Sciences Technische Universität DarmstadtUNSPECIFIED
Sata, NorikoNoriko.Sata (at) dlr.dehttps://orcid.org/0000-0002-3103-2051
Han, FengFeng.Han (at) dlr.dehttps://orcid.org/0000-0003-1904-134X
Schiller, GünterGuenter.Schiller (at) dlr.dehttps://orcid.org/0000-0001-5093-7625
Costa, Rémiremi.costa (at) dlr.dehttps://orcid.org/0000-0002-3534-1935
Friedrich, Kaspar AndreasAndreas.Friedrich (at) dlr.deUNSPECIFIED
Date:2019
Journal or Publication Title:ECS Transactions
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:91
DOI :10.1149/09101.1751ecst
Page Range:pp. 1751-1760
Publisher:Electrochemical Society, Inc.
Series Name:ECS Transactions, 91
ISSN:1938-5862
ISBN:1938-5862
Status:Published
Keywords:perovskite, A–site deficiency, fuel electrode, exsolution, co–electrolysis
HGF - Research field:Energy
HGF - Program:Technology, Innovation and Society
HGF - Program Themes:Renewable Energy and Material Resources for Sustainable Futures - Integrating at Different Scales
DLR - Research area:Energy
DLR - Program:E SY - Energy Systems Analysis
DLR - Research theme (Project):E - Energy Systems Technology (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Amaya Duenas, Diana Maria
Deposited On:27 Apr 2020 19:34
Last Modified:31 Oct 2020 04:35

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