Life testing of Ni-YSZ fuel electrodes under electrolysis, fuel cell, and current switching operation

Q. Liu; H. Wang; D. Kennouche; C. Riscoe; D. Butts; S. A. Barnett

doi:10.1149/07801.3179ecst

Life testing of Ni-YSZ fuel electrodes under electrolysis, fuel cell, and current switching operation

Q. Liu, H. Wang, D. Kennouche, C. Riscoe, D. Butts, S. A. Barnett

Materials Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

An electrode supported Ni-YSZ/YSZ/Ni-YSZ symmetric cell was studied in life tests with constant current and switching current operation. At a current density of 0.2 A/cm², there was no evidence of degradation. The cell electrochemical performance degraded slightly during life tests at current densities ≥ 0.8 A/cm², with the ohmic resistance increasing and polarization resistance decreasing. The electrode/electrolyte interface structure was found to be seriously degraded after the life tests, with the formation of interfacial voids. In addition, grain boundary voids were observed within the YSZ electrolyte, especially after constant current operation. These observations presumably explain the observed electrolyte resistance increase. Both Ni and YSZ nanoparticles were observed in the electrode functional layers after life tests, possibly explaining the decrease of polarization resistance.

Original language	English (US)
Title of host publication	ECS Transactions
Editors	T. Kawada, S. C. Singhal
Publisher	Electrochemical Society Inc.
Pages	3179-3188
Number of pages	10
Edition	1
ISBN (Electronic)	9781607685395
DOIs	https://doi.org/10.1149/07801.3179ecst
State	Published - May 30 2017
Event	15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 - Hollywood, United States Duration: Jul 23 2017 → Jul 28 2017

Publication series

Name	ECS Transactions
Number	1
Volume	78
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017
Country	United States
City	Hollywood
Period	7/23/17 → 7/28/17

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1149/07801.3179ecst

Fingerprint Dive into the research topics of 'Life testing of Ni-YSZ fuel electrodes under electrolysis, fuel cell, and current switching operation'. Together they form a unique fingerprint.

Cite this

@inproceedings{99a5c12a20574f08a585aca6bae33d15,

title = "Life testing of Ni-YSZ fuel electrodes under electrolysis, fuel cell, and current switching operation",

abstract = "An electrode supported Ni-YSZ/YSZ/Ni-YSZ symmetric cell was studied in life tests with constant current and switching current operation. At a current density of 0.2 A/cm2, there was no evidence of degradation. The cell electrochemical performance degraded slightly during life tests at current densities ≥ 0.8 A/cm2, with the ohmic resistance increasing and polarization resistance decreasing. The electrode/electrolyte interface structure was found to be seriously degraded after the life tests, with the formation of interfacial voids. In addition, grain boundary voids were observed within the YSZ electrolyte, especially after constant current operation. These observations presumably explain the observed electrolyte resistance increase. Both Ni and YSZ nanoparticles were observed in the electrode functional layers after life tests, possibly explaining the decrease of polarization resistance.",

author = "Q. Liu and H. Wang and D. Kennouche and C. Riscoe and D. Butts and Barnett, {S. A.}",

year = "2017",

month = may,

day = "30",

doi = "10.1149/07801.3179ecst",

language = "English (US)",

series = "ECS Transactions",

publisher = "Electrochemical Society Inc.",

number = "1",

pages = "3179--3188",

editor = "T. Kawada and Singhal, {S. C.}",

booktitle = "ECS Transactions",

edition = "1",

note = "15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 ; Conference date: 23-07-2017 Through 28-07-2017",

}

Liu, Q, Wang, H, Kennouche, D, Riscoe, C, Butts, D & Barnett, SA 2017, Life testing of Ni-YSZ fuel electrodes under electrolysis, fuel cell, and current switching operation. in T Kawada & SC Singhal (eds), ECS Transactions. 1 edn, ECS Transactions, no. 1, vol. 78, Electrochemical Society Inc., pp. 3179-3188, 15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017, Hollywood, United States, 7/23/17. https://doi.org/10.1149/07801.3179ecst

Life testing of Ni-YSZ fuel electrodes under electrolysis, fuel cell, and current switching operation. / Liu, Q.; Wang, H.; Kennouche, D.; Riscoe, C.; Butts, D.; Barnett, S. A.

ECS Transactions. ed. / T. Kawada; S. C. Singhal. 1. ed. Electrochemical Society Inc., 2017. p. 3179-3188 (ECS Transactions; Vol. 78, No. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Life testing of Ni-YSZ fuel electrodes under electrolysis, fuel cell, and current switching operation

AU - Liu, Q.

AU - Wang, H.

AU - Kennouche, D.

AU - Riscoe, C.

AU - Butts, D.

AU - Barnett, S. A.

PY - 2017/5/30

Y1 - 2017/5/30

N2 - An electrode supported Ni-YSZ/YSZ/Ni-YSZ symmetric cell was studied in life tests with constant current and switching current operation. At a current density of 0.2 A/cm2, there was no evidence of degradation. The cell electrochemical performance degraded slightly during life tests at current densities ≥ 0.8 A/cm2, with the ohmic resistance increasing and polarization resistance decreasing. The electrode/electrolyte interface structure was found to be seriously degraded after the life tests, with the formation of interfacial voids. In addition, grain boundary voids were observed within the YSZ electrolyte, especially after constant current operation. These observations presumably explain the observed electrolyte resistance increase. Both Ni and YSZ nanoparticles were observed in the electrode functional layers after life tests, possibly explaining the decrease of polarization resistance.

AB - An electrode supported Ni-YSZ/YSZ/Ni-YSZ symmetric cell was studied in life tests with constant current and switching current operation. At a current density of 0.2 A/cm2, there was no evidence of degradation. The cell electrochemical performance degraded slightly during life tests at current densities ≥ 0.8 A/cm2, with the ohmic resistance increasing and polarization resistance decreasing. The electrode/electrolyte interface structure was found to be seriously degraded after the life tests, with the formation of interfacial voids. In addition, grain boundary voids were observed within the YSZ electrolyte, especially after constant current operation. These observations presumably explain the observed electrolyte resistance increase. Both Ni and YSZ nanoparticles were observed in the electrode functional layers after life tests, possibly explaining the decrease of polarization resistance.

UR - http://www.scopus.com/inward/record.url?scp=85028453022&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85028453022&partnerID=8YFLogxK

U2 - 10.1149/07801.3179ecst

DO - 10.1149/07801.3179ecst

M3 - Conference contribution

AN - SCOPUS:85028453022

T3 - ECS Transactions

SP - 3179

EP - 3188

BT - ECS Transactions

A2 - Kawada, T.

A2 - Singhal, S. C.

PB - Electrochemical Society Inc.

T2 - 15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017

Y2 - 23 July 2017 through 28 July 2017

ER -