A high power density solid oxide fuel cell based on nano-structured La0.8Sr0.2Cr0.5Fe0.5O3-δ anode

Tao  Wei; Xinping  Zhou; Qiang Hu; Qingyu  Gao; Da  Han; Xiaoli  Lv

doi:10.1016/j.electacta.2014.10.020

A high power density solid oxide fuel cell based on nano-structured La_0.8Sr_0.2Cr_0.5Fe_0.5O_3-δ anode

Tao Wei, Xinping Zhou, Qiang Hu, Qingyu Gao, Da Han, Xiaoli Lv

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Solid oxide fuel cell (SOFC) that is capable to operate on both hydrogen and methane as fuels is desired and its anode receives particular attention since it is the cell component directly converting fuels. (La,Sr)CrFeO3-δ is regarded as a candidate anode material but its electrochemical performance has been unsatisfactory. In this study, we improved the performance of an SOFC based exclusively on a La0.8Sr0.2Cr0.5Fe0.5O3-δ anode by means of impregnation. At 800 °C, the maximum power densities of such a cell reach 846 mWcm⁻² with hydrogen as fuel, and 117 mW cm⁻² when methane is fed. The anode polarization resistances are 0.06 ohm cm² in hydrogen and 0.57 ohm cm² in methane, estimated from impedance spectra fitting results. During a stability test of 100 h in hydrogen under a current loading of 850 mAcm⁻², a conditioning period of ca. 50 h is seen during which the power density decreases moderately, and afterward the power density becomes gradually stable at around 490mW cm⁻².

Original language	English
Journal	Electrochimica Acta
Volume	148
Pages (from-to)	33–38
ISSN	0013-4686
DOIs	https://doi.org/10.1016/j.electacta.2014.10.020
Publication status	Published - 2014

Keywords

Solid oxide fuel cell
All perovskite
Nanostructured electrodes
Impregnation

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title = "A high power density solid oxide fuel cell based on nano-structured La0.8Sr0.2Cr0.5Fe0.5O3-δ anode",

abstract = "Solid oxide fuel cell (SOFC) that is capable to operate on both hydrogen and methane as fuels is desired and its anode receives particular attention since it is the cell component directly converting fuels. (La,Sr)CrFeO3-δ is regarded as a candidate anode material but its electrochemical performance has been unsatisfactory. In this study, we improved the performance of an SOFC based exclusively on a La0.8Sr0.2Cr0.5Fe0.5O3-δ anode by means of impregnation. At 800 °C, the maximum power densities of such a cell reach 846 mWcm−2 with hydrogen as fuel, and 117 mW cm−2 when methane is fed. The anode polarization resistances are 0.06 ohm cm2 in hydrogen and 0.57 ohm cm2 in methane, estimated from impedance spectra fitting results. During a stability test of 100 h in hydrogen under a current loading of 850 mAcm−2, a conditioning period of ca. 50 h is seen during which the power density decreases moderately, and afterward the power density becomes gradually stable at around 490mW cm−2.",

keywords = "Solid oxide fuel cell, All perovskite, Nanostructured electrodes, Impregnation",

author = "Tao Wei and Xinping Zhou and Qiang Hu and Qingyu Gao and Da Han and Xiaoli Lv",

year = "2014",

doi = "10.1016/j.electacta.2014.10.020",

language = "English",

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journal = "Electrochimica Acta",

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TY - JOUR

T1 - A high power density solid oxide fuel cell based on nano-structured La0.8Sr0.2Cr0.5Fe0.5O3-δ anode

AU - Wei, Tao

AU - Zhou, Xinping

AU - Hu, Qiang

AU - Gao, Qingyu

AU - Han, Da

AU - Lv, Xiaoli

PY - 2014

Y1 - 2014

N2 - Solid oxide fuel cell (SOFC) that is capable to operate on both hydrogen and methane as fuels is desired and its anode receives particular attention since it is the cell component directly converting fuels. (La,Sr)CrFeO3-δ is regarded as a candidate anode material but its electrochemical performance has been unsatisfactory. In this study, we improved the performance of an SOFC based exclusively on a La0.8Sr0.2Cr0.5Fe0.5O3-δ anode by means of impregnation. At 800 °C, the maximum power densities of such a cell reach 846 mWcm−2 with hydrogen as fuel, and 117 mW cm−2 when methane is fed. The anode polarization resistances are 0.06 ohm cm2 in hydrogen and 0.57 ohm cm2 in methane, estimated from impedance spectra fitting results. During a stability test of 100 h in hydrogen under a current loading of 850 mAcm−2, a conditioning period of ca. 50 h is seen during which the power density decreases moderately, and afterward the power density becomes gradually stable at around 490mW cm−2.

AB - Solid oxide fuel cell (SOFC) that is capable to operate on both hydrogen and methane as fuels is desired and its anode receives particular attention since it is the cell component directly converting fuels. (La,Sr)CrFeO3-δ is regarded as a candidate anode material but its electrochemical performance has been unsatisfactory. In this study, we improved the performance of an SOFC based exclusively on a La0.8Sr0.2Cr0.5Fe0.5O3-δ anode by means of impregnation. At 800 °C, the maximum power densities of such a cell reach 846 mWcm−2 with hydrogen as fuel, and 117 mW cm−2 when methane is fed. The anode polarization resistances are 0.06 ohm cm2 in hydrogen and 0.57 ohm cm2 in methane, estimated from impedance spectra fitting results. During a stability test of 100 h in hydrogen under a current loading of 850 mAcm−2, a conditioning period of ca. 50 h is seen during which the power density decreases moderately, and afterward the power density becomes gradually stable at around 490mW cm−2.

KW - Solid oxide fuel cell

KW - All perovskite

KW - Nanostructured electrodes

KW - Impregnation

U2 - 10.1016/j.electacta.2014.10.020

DO - 10.1016/j.electacta.2014.10.020

M3 - Journal article

SN - 0013-4686

VL - 148

SP - 33

EP - 38

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -