Bismuth-doped La1.75Sr0.25NiO4+: δ as a novel cathode material for solid oxide fuel cells

Zhesheng Zhu, Mei Li, Changrong Xia*, Henny J.M. Bouwmeester

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)
1 Downloads (Pure)

Abstract

Bismuth has been doped into mixed ionic-electronic conducting La1.75Sr0.25NiO4+δ (LSN) with the 2D K2NiF4-type structure to evaluate its influence on various properties of the host material, which include its potential use as a SOFC cathode. X-ray powder diffraction indicates that LSN retains its tetragonal structure after doping with 5 mol% bismuth to form La1.65Bi0.1Sr0.25NiO4+δ (LSN-Bi). Bismuth doping profoundly lowers (by ∼150 °C) the sintering temperature of LSN. Both LSN and LSN-Bi show excellent compatibility with electrolytes yttria-stabilized zirconia (YSZ) and samaria-doped ceria (SDC) in terms of thermal expansion and chemical reactivity (<900 °C). The electrical conductivity of both materials is metallic like and reaches values of 99.3 S cm-1 and 100.3 S cm-1 at 550 °C for LSN and LSN-Bi, respectively. The data from electrical conductivity relaxation (ECR) measurements demonstrate that the substitution of lanthanum by bismuth enhances the chemical diffusion coefficient (Dchem) and surface exchange coefficient (kchem) by factors of 2-3. The faster kinetics of oxygen transport exhibited by LSN-Bi relative to parent LSN is reflected by a lower polarization resistance of the former when the electrode performance of both materials is compared in symmetric cells. The corresponding values at 700 °C are 4.2 Ω cm2 and 0.61 Ω cm2 for LSN and LSN-Bi, respectively. High peak power densities are achieved (328 mW cm-2 and 131 mW cm-2 at 700 and 600 °C, respectively), when LSN-Bi is incorporated as the cathode in a fuel cell operated with humidified hydrogen as the fuel and air as the cathode gas. The material is considered a promising candidate for further study.

Original languageEnglish
Pages (from-to)14012-14019
Number of pages8
JournalJournal of materials chemistry. A
Volume5
Issue number27
DOIs
Publication statusPublished - 2017

Fingerprint

Bismuth
Solid oxide fuel cells (SOFC)
Cathodes
Doping (additives)
Lanthanum
Chemical reactivity
Yttria stabilized zirconia
Cerium compounds
X ray powder diffraction
Electrolytes
Thermal expansion
Fuel cells
Hydrogen
Substitution reactions
Sintering
Gases
Polarization
Oxygen
Electrodes
Kinetics

Cite this

@article{0f51085545294fccb0121173ab0dece2,
title = "Bismuth-doped La1.75Sr0.25NiO4+: δ as a novel cathode material for solid oxide fuel cells",
abstract = "Bismuth has been doped into mixed ionic-electronic conducting La1.75Sr0.25NiO4+δ (LSN) with the 2D K2NiF4-type structure to evaluate its influence on various properties of the host material, which include its potential use as a SOFC cathode. X-ray powder diffraction indicates that LSN retains its tetragonal structure after doping with 5 mol{\%} bismuth to form La1.65Bi0.1Sr0.25NiO4+δ (LSN-Bi). Bismuth doping profoundly lowers (by ∼150 °C) the sintering temperature of LSN. Both LSN and LSN-Bi show excellent compatibility with electrolytes yttria-stabilized zirconia (YSZ) and samaria-doped ceria (SDC) in terms of thermal expansion and chemical reactivity (<900 °C). The electrical conductivity of both materials is metallic like and reaches values of 99.3 S cm-1 and 100.3 S cm-1 at 550 °C for LSN and LSN-Bi, respectively. The data from electrical conductivity relaxation (ECR) measurements demonstrate that the substitution of lanthanum by bismuth enhances the chemical diffusion coefficient (Dchem) and surface exchange coefficient (kchem) by factors of 2-3. The faster kinetics of oxygen transport exhibited by LSN-Bi relative to parent LSN is reflected by a lower polarization resistance of the former when the electrode performance of both materials is compared in symmetric cells. The corresponding values at 700 °C are 4.2 Ω cm2 and 0.61 Ω cm2 for LSN and LSN-Bi, respectively. High peak power densities are achieved (328 mW cm-2 and 131 mW cm-2 at 700 and 600 °C, respectively), when LSN-Bi is incorporated as the cathode in a fuel cell operated with humidified hydrogen as the fuel and air as the cathode gas. The material is considered a promising candidate for further study.",
author = "Zhesheng Zhu and Mei Li and Changrong Xia and Bouwmeester, {Henny J.M.}",
year = "2017",
doi = "10.1039/c7ta03381h",
language = "English",
volume = "5",
pages = "14012--14019",
journal = "Journal of materials chemistry. A",
issn = "2050-7488",
publisher = "Royal Society of Chemistry",
number = "27",

}

Bismuth-doped La1.75Sr0.25NiO4+: δ as a novel cathode material for solid oxide fuel cells. / Zhu, Zhesheng; Li, Mei; Xia, Changrong; Bouwmeester, Henny J.M.

In: Journal of materials chemistry. A, Vol. 5, No. 27, 2017, p. 14012-14019.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Bismuth-doped La1.75Sr0.25NiO4+: δ as a novel cathode material for solid oxide fuel cells

AU - Zhu, Zhesheng

AU - Li, Mei

AU - Xia, Changrong

AU - Bouwmeester, Henny J.M.

PY - 2017

Y1 - 2017

N2 - Bismuth has been doped into mixed ionic-electronic conducting La1.75Sr0.25NiO4+δ (LSN) with the 2D K2NiF4-type structure to evaluate its influence on various properties of the host material, which include its potential use as a SOFC cathode. X-ray powder diffraction indicates that LSN retains its tetragonal structure after doping with 5 mol% bismuth to form La1.65Bi0.1Sr0.25NiO4+δ (LSN-Bi). Bismuth doping profoundly lowers (by ∼150 °C) the sintering temperature of LSN. Both LSN and LSN-Bi show excellent compatibility with electrolytes yttria-stabilized zirconia (YSZ) and samaria-doped ceria (SDC) in terms of thermal expansion and chemical reactivity (<900 °C). The electrical conductivity of both materials is metallic like and reaches values of 99.3 S cm-1 and 100.3 S cm-1 at 550 °C for LSN and LSN-Bi, respectively. The data from electrical conductivity relaxation (ECR) measurements demonstrate that the substitution of lanthanum by bismuth enhances the chemical diffusion coefficient (Dchem) and surface exchange coefficient (kchem) by factors of 2-3. The faster kinetics of oxygen transport exhibited by LSN-Bi relative to parent LSN is reflected by a lower polarization resistance of the former when the electrode performance of both materials is compared in symmetric cells. The corresponding values at 700 °C are 4.2 Ω cm2 and 0.61 Ω cm2 for LSN and LSN-Bi, respectively. High peak power densities are achieved (328 mW cm-2 and 131 mW cm-2 at 700 and 600 °C, respectively), when LSN-Bi is incorporated as the cathode in a fuel cell operated with humidified hydrogen as the fuel and air as the cathode gas. The material is considered a promising candidate for further study.

AB - Bismuth has been doped into mixed ionic-electronic conducting La1.75Sr0.25NiO4+δ (LSN) with the 2D K2NiF4-type structure to evaluate its influence on various properties of the host material, which include its potential use as a SOFC cathode. X-ray powder diffraction indicates that LSN retains its tetragonal structure after doping with 5 mol% bismuth to form La1.65Bi0.1Sr0.25NiO4+δ (LSN-Bi). Bismuth doping profoundly lowers (by ∼150 °C) the sintering temperature of LSN. Both LSN and LSN-Bi show excellent compatibility with electrolytes yttria-stabilized zirconia (YSZ) and samaria-doped ceria (SDC) in terms of thermal expansion and chemical reactivity (<900 °C). The electrical conductivity of both materials is metallic like and reaches values of 99.3 S cm-1 and 100.3 S cm-1 at 550 °C for LSN and LSN-Bi, respectively. The data from electrical conductivity relaxation (ECR) measurements demonstrate that the substitution of lanthanum by bismuth enhances the chemical diffusion coefficient (Dchem) and surface exchange coefficient (kchem) by factors of 2-3. The faster kinetics of oxygen transport exhibited by LSN-Bi relative to parent LSN is reflected by a lower polarization resistance of the former when the electrode performance of both materials is compared in symmetric cells. The corresponding values at 700 °C are 4.2 Ω cm2 and 0.61 Ω cm2 for LSN and LSN-Bi, respectively. High peak power densities are achieved (328 mW cm-2 and 131 mW cm-2 at 700 and 600 °C, respectively), when LSN-Bi is incorporated as the cathode in a fuel cell operated with humidified hydrogen as the fuel and air as the cathode gas. The material is considered a promising candidate for further study.

UR - http://www.scopus.com/inward/record.url?scp=85027064432&partnerID=8YFLogxK

U2 - 10.1039/c7ta03381h

DO - 10.1039/c7ta03381h

M3 - Article

AN - SCOPUS:85027064432

VL - 5

SP - 14012

EP - 14019

JO - Journal of materials chemistry. A

JF - Journal of materials chemistry. A

SN - 2050-7488

IS - 27

ER -