Effect of humidification at anode and cathode in proton-conducting SOFCs

H  Taherparvar; J A  Kilner; R T  Baker; M  Sahibzada

doi:10.1016/S0167-2738(03)00222-4

Effect of humidification at anode and cathode in proton-conducting SOFCs

H Taherparvar, J A Kilner, R T Baker, M Sahibzada

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

Abstract

Electrical conductivity measurements and hydrogen-oxygen fuel cell experiments were carried out at 600-800 degreesC using proton-conducting Yb-doped SrCeO3. The total conductivity increased with P-O2 higher than 10(-5) atm and decreased with respect to P-H2O, suggesting that electron hole formation was suppressed in the presence of water. In fuel cell tests, the introduction of water to the oxygen cathode resulted in a lower OCV due to the converse hydrogen potential, but a higher ionic transport number in agreement with the conductivity measurements. The introduction of water to the hydrogen anode did not affect the OCV but improved (lowered) the area-specific resistance (ASR), probably by promotion of the uptake of protons through hydroxyl insertion. (C) 2003 Elsevier B.V. All right reserved.

Original language	English
Pages (from-to)	297-303
Number of pages	7
Journal	Solid State Ionics
Volume	162
DOIs	https://doi.org/10.1016/S0167-2738(03)00222-4
Publication status	Published - 2003

Keywords

hydroxyl insertion
solid oxide fuel cell
conductivity measurements
SRCE0.95YB0.05O3
ATMOSPHERES

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10.1016/S0167-2738(03)00222-4

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title = "Effect of humidification at anode and cathode in proton-conducting SOFCs",

abstract = "Electrical conductivity measurements and hydrogen-oxygen fuel cell experiments were carried out at 600-800 degreesC using proton-conducting Yb-doped SrCeO3. The total conductivity increased with P-O2 higher than 10(-5) atm and decreased with respect to P-H2O, suggesting that electron hole formation was suppressed in the presence of water. In fuel cell tests, the introduction of water to the oxygen cathode resulted in a lower OCV due to the converse hydrogen potential, but a higher ionic transport number in agreement with the conductivity measurements. The introduction of water to the hydrogen anode did not affect the OCV but improved (lowered) the area-specific resistance (ASR), probably by promotion of the uptake of protons through hydroxyl insertion. (C) 2003 Elsevier B.V. All right reserved.",

keywords = "hydroxyl insertion, solid oxide fuel cell, conductivity measurements, SRCE0.95YB0.05O3, ATMOSPHERES",

author = "H Taherparvar and Kilner, {J A} and Baker, {R T} and M Sahibzada",

year = "2003",

doi = "10.1016/S0167-2738(03)00222-4",

language = "English",

volume = "162",

pages = "297--303",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

}

TY - JOUR

T1 - Effect of humidification at anode and cathode in proton-conducting SOFCs

AU - Taherparvar, H

AU - Kilner, J A

AU - Baker, R T

AU - Sahibzada, M

PY - 2003

Y1 - 2003

N2 - Electrical conductivity measurements and hydrogen-oxygen fuel cell experiments were carried out at 600-800 degreesC using proton-conducting Yb-doped SrCeO3. The total conductivity increased with P-O2 higher than 10(-5) atm and decreased with respect to P-H2O, suggesting that electron hole formation was suppressed in the presence of water. In fuel cell tests, the introduction of water to the oxygen cathode resulted in a lower OCV due to the converse hydrogen potential, but a higher ionic transport number in agreement with the conductivity measurements. The introduction of water to the hydrogen anode did not affect the OCV but improved (lowered) the area-specific resistance (ASR), probably by promotion of the uptake of protons through hydroxyl insertion. (C) 2003 Elsevier B.V. All right reserved.

AB - Electrical conductivity measurements and hydrogen-oxygen fuel cell experiments were carried out at 600-800 degreesC using proton-conducting Yb-doped SrCeO3. The total conductivity increased with P-O2 higher than 10(-5) atm and decreased with respect to P-H2O, suggesting that electron hole formation was suppressed in the presence of water. In fuel cell tests, the introduction of water to the oxygen cathode resulted in a lower OCV due to the converse hydrogen potential, but a higher ionic transport number in agreement with the conductivity measurements. The introduction of water to the hydrogen anode did not affect the OCV but improved (lowered) the area-specific resistance (ASR), probably by promotion of the uptake of protons through hydroxyl insertion. (C) 2003 Elsevier B.V. All right reserved.

KW - hydroxyl insertion

KW - solid oxide fuel cell

KW - conductivity measurements

KW - SRCE0.95YB0.05O3

KW - ATMOSPHERES

U2 - 10.1016/S0167-2738(03)00222-4

DO - 10.1016/S0167-2738(03)00222-4

M3 - Article

SN - 0167-2738

VL - 162

SP - 297

EP - 303

JO - Solid State Ionics

JF - Solid State Ionics

ER -

Effect of humidification at anode and cathode in proton-conducting SOFCs

Abstract

Keywords

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