Effect of double doping on crystal structure and electrical conductivity of CaO and WO3-doped Bi2O3

Hsieh, Cheng Yen; Wang, Hao Sheng; Fung, Kuan‐Zong

doi:10.1016/j.jeurceramsoc.2011.04.011

Cited by 11 publications

(4 citation statements)

References 23 publications

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“…obtained from XRD measurements are given in Table I and they are in the range 5.5400-5.4862 Å. These results are in a good agreement with the results obtained from similar studies in literature [7,24,25].…”

Section: Xrd Measurement Resultssupporting

confidence: 90%

“…Additionally, these bismuth-based electrolytes show that they have high conductivity rapid start-up, but not have better stability, improved durability and higher robustness compared to zirconium-based electrolytes [19][20][21]. These studies, especially, have been concentrated on bismuthbased binary [22][23][24] and ternary type ceramic electrolytes [17,[25][26][27][28] to improve their conductivity, stability and durability. Researchers studying the binary system electrolytes have observed that nearly all of them have the stable cubic δ-Bi 2 O 3 phase and their conductivities vary from ≈10 −7 to ≈10 −2 S cm −1 [20,29].…”

Section: Introductionmentioning

confidence: 99%

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Synthesizing of (Bi₂O₃)_1-x-y(Ho₂O₃)_x(Dy₂O₃)_yElectrolytes for Intermediate-Temperature Solid Oxide Fuel Cells

et al. 2016

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In present study, Ho2O3 and Dy2O3 doped Bi2O3 composite materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs) were investigated. (Bi2O3)1−x−y(Ho2O3)x(Dy2O3)y ternary systems (x = 0.11, 0.13, 0.15 and y = 0.01, 0.03, 0.05, 0.07) were fabricated using conventional solid-state synthesis techniques. The samples were characterized by means of X-ray powder diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, differential thermal analysis/thermal gravimeter, and the four-point probe technique. X-ray powder diffraction measurements indicated that all samples have the stable fluorite type face centered cubic (fcc) δ-Bi2O3 phase. Scanning electron microscopy micrographs of all of the samples showed that grain size distribution was uniform. Four-point probe technique measurements showed that the conductivity of the samples increase with increase of temperature. Additionally, it has been found that the maximum conductivity values of all samples fall in a range 8.44 × 10 −2 −4.60 × 10 −1 S cm −1 and their conductivity values corresponding to the intermediatetemperature region vary in the range 1.65 × 10 −3 −2.30 × 10 −1 S cm −1. The activation energy values of the samples were calculated from log σ graphics versus 1000/T using the Arrhenius equation. It was found that there is a good agreement between the activation energy values and conductivity values.

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Section: Xrd Measurement Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Synthesizing of (Bi₂O₃)_1-x-y(Ho₂O₃)_x(Dy₂O₃)_yElectrolytes for Intermediate-Temperature Solid Oxide Fuel Cells

et al. 2016

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“…Therefore, in order to preserve high conductivity properties of δ-Bi 2 O 3 , β-Bi 2 O 3 and γ-Bi 2 O 3 phases, bismuth oxide based electrolytes can be more stabilized by addition of rare earth elements such as Ho, Dy, Er, Tb, Tm, Eu, and Ce into pure Bi 2 O 3 [18][19][20][21]. Many of the researchers have investigated crystal structures, stabilities, and conductivities of the bismuth based binary [17,[22][23][24][25][26] and ternary [27][28][29][30]…”

Section: Introductionmentioning

confidence: 99%

Investigation of Structural and Electrical Properties of (Bi₂O₃)_1-x-y(CeO₂)_x(Eu₂O₃)_y Electrolytes for Solid Oxide Fuel Cells

et al. 2019

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In the present study, CeO2 and Eu2O3 doped Bi2O3 composite materials for solid oxide fuel cells were investigated. (Bi2O3)1−x−y(CeO2)x(Eu2O3)y ternary systems (x = 0.01, 0.03, 0.05, 0.07, 0.09, 0.11 and y = 0.11, 0.09, 0.07, 0.05, 0.03, 0.01 dopant concentrations) were fabricated at different temperatures (650, 700, 750, and 800 • C) using conventional solid-state synthesis techniques. Characterization of these electrolyte samples were carried out by X-ray powder diffraction, differential thermal analysis/thermal gravimeter, and the four-point probe technique measurements. X-ray powder diffraction measurements showed that nearly all the samples have α + β + γ phase except the samples with tetragonal β-phase sintered at 700, 750 • C and 750, 800 • C with the dopant ratios (x = 0.07, y = 0.05) and (x = 0.09, y = 0.03), respectively. Four-point probe technique measurements showed that the measured ionic conductivity of the stable samples vary in the range 1.05 × 10 −1-4.76 × 10 −1 S/cm. Additionally, the activation energy values of the samples were calculated with the help of the Arrhenius equation adapted to the logσ graphics versus 1000/T varying in the range 0.7799-0.8746 eV. This result shows that there is a good relationship between the activation energy values and conductivity values.

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“…Böylece oda sıcaklığında kararlı, örgü kusurlu ve yüksek oksijen iyonik iletken bir malzeme üretilmiş olur [1]. İkili katkılama rejimi ile elde edilen Bizmut tabanlı üçlü bileşiklerin, ikili bileşiklerden daha iyi özelliklere sahip olduğunun belirlenmesiyle birlikte, bu tip elektroseramiklere ilgi de son yıllarda artmıştır [2][3][4][5][6][7]. Bizmut-tabanlı katı elektrolitlerin iletkenlik mekanizmasının oksijen iyonik iletkenlik tipinde olması ve oksijen iyonlarının ana yük taşıyıcıları olması aynı zamanda oksijen dedektörlerinin üretiminde yaygın kullanım alanına sahip olmasını sağlamaktadır [8][9][10].…”

Section: Introductionunclassified

Kati Oksi̇t Yakit Hücreleri̇nde Kullanilmak Üzere Şeri̇t Döküm Yöntemi̇yle Bi̇zmut Tabanli Yeni̇ Ti̇p Elektroli̇tleri̇n Üreti̇lmesi̇ Ve Yakit Hücre Uygulamasi

Yılmaz

2018

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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ÖZBizmut-temelli katı elektrolitler özellikle oksijen pompaları, oksijen gaz dedektörleri ve yakıt pillerinde katı elektrolit olarak kullanılmaktadır. Bu tür elektroseramikler, üretilmekte olan Seria-temelli ve Zirkonya-temelli olanlara iletkenlik özellikleri bakımından güçlü bir alternatif malzemedir. Bu çalışmada, kolay üretilebilen yeni tip Bizmut-tabanlı katkılanmış katı elektrolit tozların sentezlenmesine, ince tabaka formunda şekillendirilmesine ve elektriksel güç üretiminin gözlenmesi için tekli yakıt hücre uygulamasının yapılmasına dair tüm süreçler ayrıntılı şekilde açıklandı. Bu amaçla Lantanit grubunun (Gd 2 O 3 ) ve (Dy 2 O 3 ) oksit bileşikleri (Bi 2 O 3 ) içerisine farklı oranlarda katkılanarak yeni tip Bizmut-temelli katı elektrolit tozlar üretildi, ardından şerit döküm yöntemi ile ince tabaka formuna getirilerek fiziksel özellikleri araştırıldı. Üretilen malzemelerin SEM ile mikroyapıları incelendi, empedans analizi ile sıcaklığa ve zamana bağlı iletkenlik karakterizasyonları yapıldı, aktivasyon enerjileri ve yük taşıyıcı sayıları ölçüldü. Ardından üretilen katı elektrolitin tekli yakıt hücresi uygulaması yapıldı. Bunun için ekran baskı yöntemi ile elektrolitin her iki yüzeyi elektrotlar ile kaplanıp güç üretimi test edildi. Tüm üretim şartlarına ait süreçler ayrıntılı şekilde araştırılarak üretim şartlarına ait tespit edilen parametreler açıklandı.Anahtar Kelimeler: Katı oksit yakıt hücresi, bizmut oksit, şerit döküm, ekran baskı, elektrik iletkenliği karakterizasyonu PRODUCTION OF BISMUTH BASED NEW TYPE ELECTROLYTES AND ITS APPLICATION IN SOLID OXIDE FUEL CELLS ABSTRACTBismuth-based solid electrolytes are used as a solid electrolyte especially in oxygen pumps, oxygen gas detectors and fuel cells. In terms of conductivity, Bi-based electro-ceramics are an alternative material according to Ceria-based and Zirconia-based ones. In this study, all the processes for the synthesis of new type stabilized Bi-based doped solid electrolyte powders, shaping in thick film form and the application of single fuel cell for observation of electrical power production have been particularly explained. For this purpose, new type Bismuth-based solid electrolyte powders were synthesized by adding lanthanide group (Gd 2 O 3 ) and (Dy 2 O 3 ) oxide compounds in (Bi 2 O 3 ) at different ratios. Subsequently, physical properties were investigated by forming a thin layer via tape casting method. Microstructures of the fabricated materials were investigated by SEM, temperature and time dependent conductivity characterization was performed by impedance analysis, Activation Energies and load carrier numbers were measured. Then, single fuel cell application of the produced solid electrolyte was done. For this, both surfaces of the electrolyte were coated with electrodes by screen printing

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Effect of double doping on crystal structure and electrical conductivity of CaO and WO3-doped Bi2O3

Cited by 11 publications

References 23 publications

Synthesizing of (Bi₂O₃)_1-x-y(Ho₂O₃)_x(Dy₂O₃)_yElectrolytes for Intermediate-Temperature Solid Oxide Fuel Cells

Synthesizing of (Bi₂O₃)_1-x-y(Ho₂O₃)_x(Dy₂O₃)_yElectrolytes for Intermediate-Temperature Solid Oxide Fuel Cells

Investigation of Structural and Electrical Properties of (Bi₂O₃)_1-x-y(CeO₂)_x(Eu₂O₃)_y Electrolytes for Solid Oxide Fuel Cells

Kati Oksi̇t Yakit Hücreleri̇nde Kullanilmak Üzere Şeri̇t Döküm Yöntemi̇yle Bi̇zmut Tabanli Yeni̇ Ti̇p Elektroli̇tleri̇n Üreti̇lmesi̇ Ve Yakit Hücre Uygulamasi

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Effect of double doping on crystal structure and electrical conductivity of CaO and WO3-doped Bi2O3

Cited by 11 publications

References 23 publications

Synthesizing of (Bi2O3)1-x-y(Ho2O3)x(Dy2O3)yElectrolytes for Intermediate-Temperature Solid Oxide Fuel Cells

Synthesizing of (Bi2O3)1-x-y(Ho2O3)x(Dy2O3)yElectrolytes for Intermediate-Temperature Solid Oxide Fuel Cells

Investigation of Structural and Electrical Properties of (Bi2O3)1-x-y(CeO2)x(Eu2O3)y Electrolytes for Solid Oxide Fuel Cells

Kati Oksi̇t Yakit Hücreleri̇nde Kullanilmak Üzere Şeri̇t Döküm Yöntemi̇yle Bi̇zmut Tabanli Yeni̇ Ti̇p Elektroli̇tleri̇n Üreti̇lmesi̇ Ve Yakit Hücre Uygulamasi

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Synthesizing of (Bi₂O₃)_1-x-y(Ho₂O₃)_x(Dy₂O₃)_yElectrolytes for Intermediate-Temperature Solid Oxide Fuel Cells

Synthesizing of (Bi₂O₃)_1-x-y(Ho₂O₃)_x(Dy₂O₃)_yElectrolytes for Intermediate-Temperature Solid Oxide Fuel Cells

Investigation of Structural and Electrical Properties of (Bi₂O₃)_1-x-y(CeO₂)_x(Eu₂O₃)_y Electrolytes for Solid Oxide Fuel Cells