Electrical properties of yttrium doped strontium titanate with A-site deficiency as potential anode materials for solid oxide fuel cells

Zhao, Hailei; Gao, Feng; Li, Xue; Zhang, Cuijuan; Zhao, Yueqing

doi:10.1016/j.ssi.2008.11.018

Cited by 58 publications

(32 citation statements)

References 34 publications

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“…Donors such as Y 3+ or La 3+ on the Sr 2+ site and Nb 5+ on the Ti 4+ site convert SrTiO 3 into a highly conducting n-type material [5]. On the other hand acceptor dopants like Al 3+ , Co 3+ or Fe 3+ on Ti 4+ site allow one to obtain a p-type material [6]. Furthermore, it has been reported that acceptor doping also results in an increased oxygen vacancy concentration and thus an increased ionic conductivity of SrTiO 3 [5,6] .…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand acceptor dopants like Al 3+ , Co 3+ or Fe 3+ on Ti 4+ site allow one to obtain a p-type material [6]. Furthermore, it has been reported that acceptor doping also results in an increased oxygen vacancy concentration and thus an increased ionic conductivity of SrTiO 3 [5,6] . Most of the papers about strontium titanate modifications refer to yttrium doping, because this material has a high total conductivity and its chemical stability is better than these of La-doped strontium titanate [7].…”

Section: Introductionmentioning

confidence: 99%

“…Gomann et al [13] reported also that diffusion of Sr and Ti cation takes place generally through strontium vacancies. The influence of defect chemistry on ionic conductivity of SrTiO 3 was studied by Zhao et al [6]. The authors suggest a new defect analysis of Y-doped strontium titanate with strontium deficiency.…”

Section: Introductionmentioning

confidence: 99%

“…The authors suggest a new defect analysis of Y-doped strontium titanate with strontium deficiency. According to Zhao et al [6], this structure can form oxygen vacancies both by reactions written in Eqs. (4) and (7):…”

Section: Introductionmentioning

confidence: 99%

“…(7) and to the electroneutrality condition (1), a decrease of yttrium concentration and increase of strontium and oxygen vacancies concentration results in a decrease of free charge carriers concentration and, at the same time, in a decrease of electronic conductivity. However, A-site deficiency in SrTiO 3 ceramic has also a great influence on ionic conductivity, caused by the increase of oxygen vacancies concentration [6]. Gao et al [14] suggest that B-site deficiency is generating oxygen vacancies, and for charge compensation, the decrease of Ti 3+ ion concentration occurs.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural and electrical properties of Y0.07Sr0.93-x TiO3-δ perovskite ceramics

et al. 2012

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Abstract:In order to find a relationship between electrical and microstructural properties, yttrium-doped strontium titanate (7 mol%) with various values of strontium nonstoichiometry was investigated and shown in this work. It has been observed that yttrium doping can affect the electrical properties of SrTiO 3 to a great extent. Moreover, the microstructural and electrical properties can be influenced by strontium nonstoichiometry. The defect chemistry explaining obtained results was also suggested and discussed. PACS

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructural and electrical properties of Y0.07Sr0.93-x TiO3-δ perovskite ceramics

et al. 2012

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Recent Progress in the Development of Anode Materials for Solid Oxide Fuel Cells

Cowin¹,

Petit²,

Lan³

et al. 2011

Advanced Energy Materials

351

218

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The fi eld of research into solid oxide fuel cell (SOFC) anode materials has been rapidly moving forward. In the four years since the last in-depth review signifi cant advancements have been made in the reduction of the operating temperature and improvement of the performance of SOFCs. This progress report examines the developments in the fi eld and looks to draw conclusions and inspiration from this research. A brief introduction is given to the fi eld, followed by an overview of the principal previous materials. A detailed analysis of the developments of the last 4 years is given using a selection of the available literature, concentrating on metal-fl uorite cermets and perovskitebased materials. This is followed by a consideration of alternate fuels for use in SOFCs and their associated problems and a short discussion on the effect of synthesis method on anode performance. The concluding remarks compile the signifi cant developments in the fi eld along with a consideration of the promise of future research. The recent progress in the development of anode materials for SOFCs based on oxygen ion conducting electrolytes is reviewed.

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Hydrogen Purification through a Highly Stable Dual‐Phase Oxygen‐Permeable Membrane

Jia

Zhang

et al. 2021

Angewandte Chemie

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Using oxygen permeable membranes (OPMs) to upgrade low-purity hydrogen is a promising concept for highpurity H 2 production. At high temperatures, water dissociates into hydrogen and oxygen. The oxygen permeates through OPM and oxidizes hydrogen in a waste stream on the other side of the membrane. Pure hydrogen can be obtained on the water-splitting side after condensation. However, the existing Co-and Fe-based OPMs are chemically instable as a result of the over-reduction of Co and Fe ions under reducing atmospheres. Herein, a dual-phase membrane Ce 0.9 Pr 0.1 O 2Àd-Pr 0.1 Sr 0.9 Mg 0.1 Ti 0.9 O 3Àd (CPO-PSM-Ti) with excellent chemical stability and mixed oxygen ionic-electronic conductivity under reducing atmospheres was developed for H 2 purification. An acceptable H 2 production rate of 0.52 mL min À1 cm À2 is achieved at 940 8C. No obvious degradation during 180 h of operation indicates the robust stability of CPO-PSM-Ti membrane. The proven mixed conductivity and excellent stability of CPO-PSM-Ti give prospective advantages over existing OPMs for upgrading low-purity hydrogen.

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Electrical properties of yttrium doped strontium titanate with A-site deficiency as potential anode materials for solid oxide fuel cells

Cited by 58 publications

References 34 publications

Microstructural and electrical properties of Y0.07Sr0.93-x TiO3-δ perovskite ceramics

Microstructural and electrical properties of Y0.07Sr0.93-x TiO3-δ perovskite ceramics

Recent Progress in the Development of Anode Materials for Solid Oxide Fuel Cells

Hydrogen Purification through a Highly Stable Dual‐Phase Oxygen‐Permeable Membrane

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