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Performance and Degradation of Electrolyte Supported SOECs with Advanced GDC Thin-film Layers in Long-term Stack Test

Han, Feng and Lang, Michael and Szabo, Patric and Geipel, Christian and Walter, Christian and Costa, Rémi (2023) Performance and Degradation of Electrolyte Supported SOECs with Advanced GDC Thin-film Layers in Long-term Stack Test.

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Abstract

Electrolyte supported Solid Oxide Cells (ESCs) with advanced thin-film Gd-doped ceria layers deposited via EB-PVD method at 600 oC were assembled and electrochemically investigated in a so-called “rainbow” stack with 30 repeat units (RUs). At the initial stage of the SOEC operation, the stack reached a high performance with an electrical efficiency of 99.65 % at 75 % steam conversion and a total power input of 1.98 kW. A long-term stack test was performed in SOEC mode for over 5000 h and demonstrated a low voltage degradation of approx. +10.9 mV·kh–1 per RU (+0.9% kh-1). The RUs with EB-PVD GDC thin-films demonstrated similar initial performance and degradation rate to the state-of-the-art cells. In this paper, the investigation mainly focuses on the electrochemical characteristics of RUs containing the EB-PVD thin-film GDC layers.

Item URL in elib:https://elib.dlr.de/195979/
Document Type:Editorship of Proceedings
Title:Performance and Degradation of Electrolyte Supported SOECs with Advanced GDC Thin-film Layers in Long-term Stack Test
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Han, FengUNSPECIFIEDhttps://orcid.org/0000-0003-1904-134XUNSPECIFIED
Lang, MichaelUNSPECIFIEDhttps://orcid.org/0000-0001-7756-9658UNSPECIFIED
Szabo, PatricUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Geipel, ChristianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Walter, ChristianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Costa, RémiUNSPECIFIEDhttps://orcid.org/0000-0002-3534-1935UNSPECIFIED
Date:June 2023
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:SOEC, stack, degradation, GDC, thin-film
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Storage
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Han, Feng
Deposited On:14 Jul 2023 13:02
Last Modified:24 Apr 2024 20:56

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