Ti-doped molybdenum-based perovskites as anodes for solid oxide fuel cells

Beibei He; Zhenbin Wang; Ling Zhao; Xin Pan; Xiaojun Wu; Changrong Xia

doi:10.1016/j.jpowsour.2013.04.148

Ti-doped molybdenum-based perovskites as anodes for solid oxide fuel cells

Beibei He, Zhenbin Wang, Ling Zhao, Xin Pan, Xiaojun Wu, Changrong Xia

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

49 Citations (Scopus)

Abstract

Ti doping is found to increase the stability of Sr₂NiMoO ₆ perovskite oxides in reducing atmosphere. The composition Sr ₂TiNi_0.5Mo_0.5O₆ (STNM) is further evaluated as a potential oxide anode for solid oxide fuel cells (SOFCs). Electrical conductivity, thermal expansion coefficient, surface exchange coefficient, chemical diffusion coefficient, and its electrochemical performance in single cells with La_0.8Sr_0.2Ga_0.8Mg _0.2O_3-δ (LSGM) electrolytes are investigated. STNM exhibits a high conductivity of 17.5 S cm^-1 at 800 C at anodic atmosphere. The material shows good chemical and thermal expansion compatibilities with LSGM. To investigate the effect of Ti doping on the conduction properties, first-principle calculations are performed using the Vienna Ab initio Simulation. The strong Ti-O bond is held responsible for the enhanced structural stability of STNM under humidified H₂ atmospheres, relative to that of the undoped system. The remarkable cell performance with both H₂ and dry CH₄ as the fuel indicates the potential ability of STNM to be used as SOFC anodes. These results obtained indicate that Sr₂TiNi_0.5Mo_0.5O₆ is a promising material for use as anode for intermediate temperature SOFCs. © 2013 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	627-633
Journal	Journal of Power Sources
Volume	241
DOIs	https://doi.org/10.1016/j.jpowsour.2013.04.148
Publication status	Published - 2013
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Ceramic anodes
Conductivity
Electrochemical performance
Solid oxide fuel cells
Ti-doping

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title = "Ti-doped molybdenum-based perovskites as anodes for solid oxide fuel cells",

abstract = "Ti doping is found to increase the stability of Sr2NiMoO 6 perovskite oxides in reducing atmosphere. The composition Sr 2TiNi0.5Mo0.5O6 (STNM) is further evaluated as a potential oxide anode for solid oxide fuel cells (SOFCs). Electrical conductivity, thermal expansion coefficient, surface exchange coefficient, chemical diffusion coefficient, and its electrochemical performance in single cells with La0.8Sr0.2Ga0.8Mg 0.2O3-δ (LSGM) electrolytes are investigated. STNM exhibits a high conductivity of 17.5 S cm-1 at 800 C at anodic atmosphere. The material shows good chemical and thermal expansion compatibilities with LSGM. To investigate the effect of Ti doping on the conduction properties, first-principle calculations are performed using the Vienna Ab initio Simulation. The strong Ti-O bond is held responsible for the enhanced structural stability of STNM under humidified H2 atmospheres, relative to that of the undoped system. The remarkable cell performance with both H2 and dry CH4 as the fuel indicates the potential ability of STNM to be used as SOFC anodes. These results obtained indicate that Sr2TiNi0.5Mo0.5O6 is a promising material for use as anode for intermediate temperature SOFCs. {\textcopyright} 2013 Elsevier B.V. All rights reserved.",

keywords = "Ceramic anodes, Conductivity, Electrochemical performance, Solid oxide fuel cells, Ti-doping",

author = "Beibei He and Zhenbin Wang and Ling Zhao and Xin Pan and Xiaojun Wu and Changrong Xia",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected]. ",

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doi = "10.1016/j.jpowsour.2013.04.148",

language = "English",

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pages = "627--633",

journal = "Journal of Power Sources",

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TY - JOUR

T1 - Ti-doped molybdenum-based perovskites as anodes for solid oxide fuel cells

AU - He, Beibei

AU - Wang, Zhenbin

AU - Zhao, Ling

AU - Pan, Xin

AU - Wu, Xiaojun

AU - Xia, Changrong

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2013

Y1 - 2013

N2 - Ti doping is found to increase the stability of Sr2NiMoO 6 perovskite oxides in reducing atmosphere. The composition Sr 2TiNi0.5Mo0.5O6 (STNM) is further evaluated as a potential oxide anode for solid oxide fuel cells (SOFCs). Electrical conductivity, thermal expansion coefficient, surface exchange coefficient, chemical diffusion coefficient, and its electrochemical performance in single cells with La0.8Sr0.2Ga0.8Mg 0.2O3-δ (LSGM) electrolytes are investigated. STNM exhibits a high conductivity of 17.5 S cm-1 at 800 C at anodic atmosphere. The material shows good chemical and thermal expansion compatibilities with LSGM. To investigate the effect of Ti doping on the conduction properties, first-principle calculations are performed using the Vienna Ab initio Simulation. The strong Ti-O bond is held responsible for the enhanced structural stability of STNM under humidified H2 atmospheres, relative to that of the undoped system. The remarkable cell performance with both H2 and dry CH4 as the fuel indicates the potential ability of STNM to be used as SOFC anodes. These results obtained indicate that Sr2TiNi0.5Mo0.5O6 is a promising material for use as anode for intermediate temperature SOFCs. © 2013 Elsevier B.V. All rights reserved.

AB - Ti doping is found to increase the stability of Sr2NiMoO 6 perovskite oxides in reducing atmosphere. The composition Sr 2TiNi0.5Mo0.5O6 (STNM) is further evaluated as a potential oxide anode for solid oxide fuel cells (SOFCs). Electrical conductivity, thermal expansion coefficient, surface exchange coefficient, chemical diffusion coefficient, and its electrochemical performance in single cells with La0.8Sr0.2Ga0.8Mg 0.2O3-δ (LSGM) electrolytes are investigated. STNM exhibits a high conductivity of 17.5 S cm-1 at 800 C at anodic atmosphere. The material shows good chemical and thermal expansion compatibilities with LSGM. To investigate the effect of Ti doping on the conduction properties, first-principle calculations are performed using the Vienna Ab initio Simulation. The strong Ti-O bond is held responsible for the enhanced structural stability of STNM under humidified H2 atmospheres, relative to that of the undoped system. The remarkable cell performance with both H2 and dry CH4 as the fuel indicates the potential ability of STNM to be used as SOFC anodes. These results obtained indicate that Sr2TiNi0.5Mo0.5O6 is a promising material for use as anode for intermediate temperature SOFCs. © 2013 Elsevier B.V. All rights reserved.

KW - Ceramic anodes

KW - Conductivity

KW - Electrochemical performance

KW - Solid oxide fuel cells

KW - Ti-doping

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U2 - 10.1016/j.jpowsour.2013.04.148

DO - 10.1016/j.jpowsour.2013.04.148

M3 - RGC 21 - Publication in refereed journal

SN - 0378-7753

VL - 241

SP - 627

EP - 633

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Ti-doped molybdenum-based perovskites as anodes for solid oxide fuel cells

Abstract

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Research Keywords

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