Ba1−xSrxCe0.8−yZryY0.2O3−δ protonic electrolytes synthesized by hetero-composition-exchange method for solid oxide fuel cells

Lee, Kan Rong; Tseng, Chung Jen; Chang, Jeng‐Kuei; Wang, Kuan Wen; Huang, Yu Shuo; Chou, Tzu Chi; Chiu, Kuo Chuang; Tsai, Li Duan; Lee, Sheng Wei

doi:10.1016/j.ijhydene.2017.01.200

Cited by 9 publications

(1 citation statement)

References 36 publications

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“…Moreover, the chemical stability improved slightly for the Ca‐ or Sr‐substituted materials due to the decreased basicity of these ions. As a result, joint modification of both A and B sublattices in Ba(Ce,Zr)O 3 has been successfully used to from new highly stable electrolytes with predominant proton conductivity in the past few years …”

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

Wang

Medvedev

Shao

2018

Adv Funct Materials

103

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Fuel cells and electrolysis cells as important types of energy conversiondevices can be divided into groups based on the electrolyte material. However, solid oxide cells (SOCs) based on conventional oxygen-ion conductors are limited by several issues, such as high operating temperature, the difficulty of hydrogen purification from water, and inferior stability. To avoid these problems, proton-conducting oxides are proposed as electrolytes for SOCs in electrolysis and fuel cell modes. Since water vapor partial pressure (pH 2 O) is one of the main parameters determining the proton concentration in proton-conducting oxides (characteristics of which can be either improved or deteriorated), the pH 2 O control is extremely important for the optimization of the devices' performance and stability. This review provides an overview of the research progresses made for proton-conducting SOCs, especially for the impact of gas humidification on the operability and performance. Fundamental understanding of the main processes in proton-conducting SOCs and design principles for the key components are summarized and discussed. The trends, challenges, and future directions that exist in this dynamic field are also pointed out. This review will inspire interest from various disciplines and provide some useful guidelines for future development of proton-conductor-based energy storage and conversion systems.

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Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

Wang

Medvedev

Shao

2018

Adv Funct Materials

103

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Production of La0.6Sr0.4Co0.2Fe0.8O3-δ cathode with graded porosity for improving proton-conducting solid oxide fuel cells

Lai

Lee

Yang

et al. 2019

Ceramics International

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Highly dense and chemically stable proton conducting electrolyte sintered at 1200 °C

Hossain

Abdalla

Radenahmad

et al. 2018

International Journal of Hydrogen Energy

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The BaCe 0.7 Zr 0.1 Y 0.2-x Zn x O 3- (x = 0.05, 0.10, 0.15, 0.20) has been synthesized by the conventional solid state reaction method for application in protonic solid oxide fuel cell. The phase purity and lattice parameters of the materials have been studied by the room temperature X-ray diffraction (XRD). Scanning electron microscopy (SEM) has been done for check the morphology and grain growth of the samples. The chemical and mechanical stabilities have been done using thermogravimetric analysis (TGA) in pure CO 2 environment and thermomechanical analysis (TMA) in Argon atmosphere. The XRD of the materials show the orthorhombic crystal symmetry with Pbnm space group. The SEM images of the pellets show that the samples sintered at 1200 o C are highly dense. The XRD after TGA in CO 2 and thermal expansion measurements confirm the stability. The particles of the samples are in micrometer ranges and increasing Zn content decreases the size. The conductivity measurements have been done in 5% H 2 with Ar in dry and wet atmospheres. All the materials show high proton conductivity in the intermediate temperature range (400-700 o C). The maximum proton conductivity was found to be 1.0  10-2 S cm-1 at 700 o C in wet atmosphere for x = 0.10. From our study, 10 wt % of Zn seems to be optimum at the B-site of the perovskite structure. All the properties studied here suggest it can be a promising candidate of electrolyte for IT-SOFCs.

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Ba1−xSrxCe0.8−yZryY0.2O3−δ protonic electrolytes synthesized by hetero-composition-exchange method for solid oxide fuel cells

Cited by 9 publications

References 36 publications

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

Production of La0.6Sr0.4Co0.2Fe0.8O3-δ cathode with graded porosity for improving proton-conducting solid oxide fuel cells

Highly dense and chemically stable proton conducting electrolyte sintered at 1200 °C

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