Effects of Al2O3 doping in BaCeO3 on chemical stability and electrical conductivity of proton conducting oxides

Shin, Eun-Kyung; Anggia, Erdienzy; Park, Jong‐Sung

doi:10.1016/j.ssi.2019.115007

Cited by 13 publications

(3 citation statements)

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“…The study by Shin et al 161 established a correlation between dopant ionic radius and chemical stability of Al 2 O 3 -doped PCs.. Goldschmidt's tolerance factor was utilized to assess the structural stability of the material. The variations in the tolerance factor between 0.936 to 0.959 for the Al 3+ substituent favors the resulting structural and charge chemistry.…”

Section: Continuedmentioning

confidence: 99%

Technological Challenges and Advancement in Proton Conductors: A Review

Vignesh

Rout

2023

Energy Fuels

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Proton conductors (PCs) are multifunctional perovskite materials with structural, electrical, and chemical compatibilities that serve as principal components in proton conducting solid oxide fuel cells (PC-SOFC). The synergetic advantages of PC-SOFC dominate lucrative applications of conventional SOFC. However, adequate advantages accompany certain key limitations in PCs. The inverse interplay between proton conductivity and chemical stability are two broader challenges which demonstrate a clear trade-off. As a consequence, different reactive constituents within the host BaCeO 3 and BaZrO 3 PCs enforce the gradient in chemical stability under diverse atmospheres, while altered charge chemistry and structural perturbations escalate the activation barrier and impose reduced proton conductivity. Such occurrences are more pronounced in acceptor-doped PCs. Although material engineering via acceptor defect substitutions assists protonation and charge dynamics, on the other hand, it provokes novel challenges (proton trapping effect) at a higher dopant volume fraction beyond the threshold. The principal entropy among chemical and electrophysical parameters is proportionally associated with dopant-incorporated subcategorical material limitations. In this study, a compilation of factors responsible for structural and electrophysical diversities as a consequence of compositional-induced symmetry variations is highlighted with a plausible conclusion and future research perspectives for smart and advanced energy applications.

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Section: Continuedmentioning

confidence: 99%

Technological Challenges and Advancement in Proton Conductors: A Review

Vignesh

Rout

2023

Energy Fuels

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“…Some researchers have put in a lot of effort to improve the conductivity of LSGM through doping various cations including Fe 3+ , Co 3+ , Ni 2+ , Cu 2+ , Mn 2+ , Ti 2+ , Cr 2+ , and Al 3+ into the Ga site. [13][14][15][16] The atomic sizes of Ni 2+ and Ga 3+ are comparable and can reside in a stable form in the crystal lattice of LSGM. Xue et al 17 reported the doping behavior of zinc (Zn), copper (Cu), cobalt (Co), and nickel (Ni) in LSGM and reported that Ni-doped LSGM showed a remarkable electronic conductivity of about 0.056 S cm À1 at 800 C and Zn-doped LSGM accounts for a higher ionic conductivity value of 0.015 S cm À1 at 800 C. It is generally considered that Co doping manifests a reduced mobility of oxygen ions within the LSGM lattice, which results in enhanced ionic conductivity on account of change in the valence state of cobalt.…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of rGO on microstructural and electrical properties of La_0.9Sr_0.1Ga_0.8Mg_0.2O₃ in intermediate temperature SOFCs

Hanif

Rauf

Qayyum

et al. 2022

Sustainable Energy Fuels

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“…Alumina is known to be an extremely stable material at high temperatures, 30 Rafael Ramrrez 31 reported that Alumina exhibits relatively pure proton conductivity at high temperatures, the diffusion coefficient and diffusion activation energy in D 2 O vapor between 1173 and 1273 K are about 10 −7 cm 2 s −1 and 1.6 eV, respectively. Then Fukatsu and other researchers [32][33][34][35] did more work on the α-alumina-type proton conductor.…”

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confidence: 99%

Research on the Electrochemical Properties of Al_2−xZn_xO_3−α

Ruan

Bao

et al. 2022

J. Electrochem. Soc.

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To understand the electrochemical properties of the Al2O3 based proton conductor in more detail, a solid-state electrolyte Zn-doped Al2O3 was successfully prepared using the solid-state reaction method at a temperatures of 1873 K for 10 h. The phase structure and microscopic morphology of these materials are thoroughly investigated. The structural analysis results revealed that the electrolyte has a pure perovskite phase structure. The crystal grains are relatively uniform, the ceramic material is dense, and the relative density is greater than 97 percent, according to microscopic morphology analysis. The electrical conductivity of the specimen was measured using the two-terminal AC method to clarify the electrochemical properties of Zn-doped Al2O3. The H/D isotope effect of electrical conductivity was studied, and it was discovered that protons are the dominant charge carrier at temperatures ranging from 1073 to 1473 K in hydrogen-rich atmospheres. From the point of view of electromotive force measurement, the theoretical (computational) electrical potential matches the measured potential very well. In a hydrogen-rich atmosphere of 1073–1473 K, the proton mobility of Al2-xZnxO3-α exceeds 0.90. In this work, we proved that Al2-xZnxO3-α sample is a proton conductor

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Effects of Al2O3 doping in BaCeO3 on chemical stability and electrical conductivity of proton conducting oxides

Cited by 13 publications

References 13 publications

Technological Challenges and Advancement in Proton Conductors: A Review

Technological Challenges and Advancement in Proton Conductors: A Review

Investigating the effect of rGO on microstructural and electrical properties of La_0.9Sr_0.1Ga_0.8Mg_0.2O₃ in intermediate temperature SOFCs

Research on the Electrochemical Properties of Al_2−xZn_xO_3−α

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Effects of Al2O3 doping in BaCeO3 on chemical stability and electrical conductivity of proton conducting oxides

Cited by 13 publications

References 13 publications

Technological Challenges and Advancement in Proton Conductors: A Review

Technological Challenges and Advancement in Proton Conductors: A Review

Investigating the effect of rGO on microstructural and electrical properties of La0.9Sr0.1Ga0.8Mg0.2O3 in intermediate temperature SOFCs

Research on the Electrochemical Properties of Al2−x Zn x O3−α

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Investigating the effect of rGO on microstructural and electrical properties of La_0.9Sr_0.1Ga_0.8Mg_0.2O₃ in intermediate temperature SOFCs

Research on the Electrochemical Properties of Al_2−xZn_xO_3−α