Improved redox cycling durability in alternative Ni alloy-based SOFC anodes

Yusuke Ishibashi; Kohei Matsumoto; Shotaro Futamura; Yuya Tachikawa; Junko Matsuda; Stephen M. Lyth; Yusuke Shiratori; Shunsuke Taniguchi; Kazunari Sasaki

doi:10.1149/1945-7111/abac87

Improved redox cycling durability in alternative Ni alloy-based SOFC anodes

Yusuke Ishibashi
, Kohei Matsumoto
, Shotaro Futamura
, Yuya Tachikawa
, Junko Matsuda
, Stephen M. Lyth
, Yusuke Shiratori
, Shunsuke Taniguchi
, Kazunari Sasaki^*

^*Corresponding author for this work

Chemical And Process Engineering

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

21 Citations (Scopus)

9 Downloads (Pure)

Abstract

Repeated reduction and oxidation of metallic nickel in the anodes of solid oxide fuel cell (SOFC) causes volume changes and agglomeration. This disrupts the electron conducting network, resulting in deterioration of the electrochemical performance. It is therefore desirable to develop more robust anodes with high redox stability. Here, new cermet anodes are developed, based on nickel alloyed with Co, Fe, and/or Cr. The stable phases of these different alloys are calculated for oxidizing and reducing conditions, and their electrochemical characteristics are evaluated. Whilst alloying causes a slight decrease in power generation efficiency, the Ni-alloy based anodes have significantly improved redox cycle durability. Microstructural observation reveals that alloying results in the formation of a dense oxide film on the surface of the catalyst particle (e.g. Co-oxide or a complex Fe-Ni-Cr oxide). These oxide layers help suppress oxidation of the underlying nickel catalyst particles, preventing oxidation-induced volume changes/agglomeration, and thereby preserving the electron conducting pathways. As such, the use of these alternative Ni-alloy based cermets significantly improves the redox stability of SOFC anodes.

Original language	English
Article number	124517
Pages (from-to)	1-17
Number of pages	17
Journal	Journal of the Electrochemical Society
Volume	167
Issue number	12
DOIs	https://doi.org/10.1149/1945-7111/abac87
Publication status	Published - 19 Aug 2020

Funding

This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, ), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: [email protected]. Japan Science and Technology Agency (JST) COI Program Grant No. JPMJCE1318 yes � 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited http://creativecommons.org/licenses/by-nc-nd/4.0/

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

redox cycling durability
anodes
catalysts
chromium alloys
redox reactions
solid oxide fuel cells (SOFC)
electrochemical characteristics

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10.1149/1945-7111/abac87Licence: CC BY-NC-ND 4.0

Ishibashi-etal-JES2020-Improved-redox-cycling-durability-alternative-Ni-alloy-based-SOFC-anodesFinal published version, 4.09 MBLicence: CC BY-NC-ND 4.0

Cite this

@article{b4fc90237c2942938fbd19ebb9e74f27,

title = "Improved redox cycling durability in alternative Ni alloy-based SOFC anodes",

abstract = "Repeated reduction and oxidation of metallic nickel in the anodes of solid oxide fuel cell (SOFC) causes volume changes and agglomeration. This disrupts the electron conducting network, resulting in deterioration of the electrochemical performance. It is therefore desirable to develop more robust anodes with high redox stability. Here, new cermet anodes are developed, based on nickel alloyed with Co, Fe, and/or Cr. The stable phases of these different alloys are calculated for oxidizing and reducing conditions, and their electrochemical characteristics are evaluated. Whilst alloying causes a slight decrease in power generation efficiency, the Ni-alloy based anodes have significantly improved redox cycle durability. Microstructural observation reveals that alloying results in the formation of a dense oxide film on the surface of the catalyst particle (e.g. Co-oxide or a complex Fe-Ni-Cr oxide). These oxide layers help suppress oxidation of the underlying nickel catalyst particles, preventing oxidation-induced volume changes/agglomeration, and thereby preserving the electron conducting pathways. As such, the use of these alternative Ni-alloy based cermets significantly improves the redox stability of SOFC anodes.",

keywords = "redox cycling durability, anodes, catalysts, chromium alloys, redox reactions, solid oxide fuel cells (SOFC), electrochemical characteristics",

author = "Yusuke Ishibashi and Kohei Matsumoto and Shotaro Futamura and Yuya Tachikawa and Junko Matsuda and Lyth, \{Stephen M.\} and Yusuke Shiratori and Shunsuke Taniguchi and Kazunari Sasaki",

note = "Funding Information: This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, ), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: [email protected]. Japan Science and Technology Agency (JST) COI Program Grant No. JPMJCE1318 yes 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited http://creativecommons.org/licenses/by-nc-nd/4.0/ Publisher Copyright: {\textcopyright} 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited. Yusuke Ishibashi et al 2020 J. Electrochem. Soc. 167 124517 DOI 10.1149/1945-7111/abac87",

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AU - Ishibashi, Yusuke

AU - Matsumoto, Kohei

AU - Futamura, Shotaro

AU - Tachikawa, Yuya

AU - Matsuda, Junko

AU - Lyth, Stephen M.

AU - Shiratori, Yusuke

AU - Taniguchi, Shunsuke

AU - Sasaki, Kazunari

N1 - Funding Information: This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, ), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: [email protected]. Japan Science and Technology Agency (JST) COI Program Grant No. JPMJCE1318 yes 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited http://creativecommons.org/licenses/by-nc-nd/4.0/ Publisher Copyright: © 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited. Yusuke Ishibashi et al 2020 J. Electrochem. Soc. 167 124517 DOI 10.1149/1945-7111/abac87

PY - 2020/8/19

Y1 - 2020/8/19

N2 - Repeated reduction and oxidation of metallic nickel in the anodes of solid oxide fuel cell (SOFC) causes volume changes and agglomeration. This disrupts the electron conducting network, resulting in deterioration of the electrochemical performance. It is therefore desirable to develop more robust anodes with high redox stability. Here, new cermet anodes are developed, based on nickel alloyed with Co, Fe, and/or Cr. The stable phases of these different alloys are calculated for oxidizing and reducing conditions, and their electrochemical characteristics are evaluated. Whilst alloying causes a slight decrease in power generation efficiency, the Ni-alloy based anodes have significantly improved redox cycle durability. Microstructural observation reveals that alloying results in the formation of a dense oxide film on the surface of the catalyst particle (e.g. Co-oxide or a complex Fe-Ni-Cr oxide). These oxide layers help suppress oxidation of the underlying nickel catalyst particles, preventing oxidation-induced volume changes/agglomeration, and thereby preserving the electron conducting pathways. As such, the use of these alternative Ni-alloy based cermets significantly improves the redox stability of SOFC anodes.

AB - Repeated reduction and oxidation of metallic nickel in the anodes of solid oxide fuel cell (SOFC) causes volume changes and agglomeration. This disrupts the electron conducting network, resulting in deterioration of the electrochemical performance. It is therefore desirable to develop more robust anodes with high redox stability. Here, new cermet anodes are developed, based on nickel alloyed with Co, Fe, and/or Cr. The stable phases of these different alloys are calculated for oxidizing and reducing conditions, and their electrochemical characteristics are evaluated. Whilst alloying causes a slight decrease in power generation efficiency, the Ni-alloy based anodes have significantly improved redox cycle durability. Microstructural observation reveals that alloying results in the formation of a dense oxide film on the surface of the catalyst particle (e.g. Co-oxide or a complex Fe-Ni-Cr oxide). These oxide layers help suppress oxidation of the underlying nickel catalyst particles, preventing oxidation-induced volume changes/agglomeration, and thereby preserving the electron conducting pathways. As such, the use of these alternative Ni-alloy based cermets significantly improves the redox stability of SOFC anodes.

KW - redox cycling durability

KW - anodes

KW - catalysts

KW - chromium alloys

KW - redox reactions

KW - solid oxide fuel cells (SOFC)

KW - electrochemical characteristics

UR - https://www.scopus.com/pages/publications/85090110497

U2 - 10.1149/1945-7111/abac87

DO - 10.1149/1945-7111/abac87

M3 - Article

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SN - 0013-4651

VL - 167

SP - 1

EP - 17

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

IS - 12

M1 - 124517

ER -

Improved redox cycling durability in alternative Ni alloy-based SOFC anodes

Abstract

Funding

UN SDGs

Keywords

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