Manganese-doped bismuth vanadate solid electrolytes

Yang, Yu-Chu; Qiu, L.; Harrison, William T. A.; Christoffersen, R.; Jacobson, Allan J.

doi:10.1039/a604694k

Cited by 29 publications

(16 citation statements)

References 18 publications

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“…Table 4 summarises the refined structural parameters; the R factors of weighted pattern (R wp ), pattern (R p ) and Bragg (R B ) converge to 16.1 %, 12.9 % and 5.87 % respectively. These values agree with those obtained in other Aurivillius [19,20] and Sillén-Aurivillius [8] phases. It is worth mentioning that the high B value obtained for Bi (2) in the refinement agrees with our previous work on the isostructural Bi 4 Ti 1/2 W 1/2 O 8 Cl compound.…”

Section: Average Structure: Powder X-ray Diffraction Refinementsupporting

confidence: 94%

A New Bi₄Mn_1/3W_2/3O₈Cl Sillén–Aurivillius Intergrowth: Synthesis and Structural Characterisation by Quantitative Transmission Electron Microscopy

et al. 2006

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The synthesis and structural characterisation of a new phase with nominal composition Bi4Mn1/3W2/3O8Cl is presented. Conventional and analytical transmission electron microscopy are used to determine the composition, unit‐cell symmetry and space group of the compound, whereas a structural model is deducted by exit‐wave reconstruction in the transmission electron microscope. This technique allows the microscope information limit of 1.1 Å to be reached and the (light) oxygen atoms in the presence of heavier atoms (Bi, W, Mn) to be imaged. The average structure is refined from X‐ray powder diffraction data using the Rietveld method yielding an orthorhombic unit cell with lattice parameters a = 5.467(4) Å, b = 5.466(7) Å and c = 14.159(3) Å and space group Cm2m, which could be described as a Sillén–Aurivillius intergrowth. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)

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Section: Average Structure: Powder X-ray Diffraction Refinementsupporting

confidence: 94%

A New Bi₄Mn_1/3W_2/3O₈Cl Sillén–Aurivillius Intergrowth: Synthesis and Structural Characterisation by Quantitative Transmission Electron Microscopy

et al. 2006

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“…Nonetheless, Adler et al have used wideline and relaxation studies of oxygen mobility to estimate O 2vacancy trapping energies and to investigate O 2mobility at elevated temperatures (6,7). Here, we extend our previously developed methodology for fluoride systems (8,9) and report detailed 17 (1,(13)(14)(15)(16). These materials can be used as oxygen separation membranes at moderate temperatures (430°to 600°C) (2).…”

mentioning

confidence: 88%

“…In addition, subtle differences in the Raman and infrared spectra (12,13) have been accepted as indicating only minor variations of the more general LDA structural category, and similar claims have been made regarding the HDA category (7). Structural studies by neutron and x-ray diffraction (14)(15)(16)(17)(18) have also resulted in the suggestion that liquid water can be considered a mixture of the low-and high-density forms (5). Conversely, relaxation, as indicated by the shift in the first diffraction peak in the HDA form of D 2 O upon annealing, has also resulted in the suggestion that some variation in the HDA structure may exist (7).…”

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confidence: 97%

Probing Oxygen Motion in Disordered Anionic Conductors with ¹⁷ O and ⁵¹ V MAS NMR Spectroscopy

Kim

Grey

2002

Science

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Identification of the local environments of the ions in a solid-state electrolyte that contribute to the ionic conductivity or remain trapped in the lattice represents a challenge for many experimental probes of structure. We show that high-resolution 17O magic angle spinning nuclear magnetic resonance (MAS NMR) spectra may be obtained even from the highly disordered, layered materials alpha-Bi4V2O11 and gamma-Bi4V1.7Ti0.3O10.85, in which the different oxide sites in the lattice may be distinguished. The sites responsible for anionic conduction were determined directly from the variable-temperature 17O NMR spectra, and correlation times for motion were estimated. Double-resonance 17O/51V NMR methods were used as confirmation of the assignments of the resonances and as a second experimental probe of motion that is sensitive to mobility involving oxide ion hops between the same crystallographic sites.

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“…Substitution with Mn 2+ in the bismuth vanadate has not been determined earlier, however study with Mn 4+ reducing under different experimental conditions is reported [11,12]. To be more detailed on this substitution, Bi 4 V 2−x Mn x O 11−δ compounds were synthesized in the composition range (0≤ x≤0.4), characterized with X-ray diffraction study and electrical conductivity measurement.…”

Section: Introductionmentioning

confidence: 99%

Ionic conductivity and structural properties of MnO-doped Bi4V2O11 system

Kant¹,

Singh

Pandey

2008

Ionics

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Bi 4 V 2 O 11 exists in three phases viz. α, β, and γ. High temperature γ-phase can be stabilized to room temperature owing to its higher conductivity by the partial substitution of metallic cations for vanadium in Bi 4 V 2 O 11 . Phase transitions from α → β and β → γ are composition and temperature-dependent. Mn 2+ -doped compounds Bi 4 V 2−x Mn x O 11−δ (0≤x≤0.4) have been synthesized by solid state reaction technique and investigated by X-ray diffraction and ionic conductivity measurement. High ionic conducting γ-phase is stabilized for x≥0.2. The ionic conductivity of the series of Bi 4 V 2−x Mn x O 11−δ samples has been measured by using ac impedance spectroscopy technique. The conductivity data do show departure from its simple Arrhenius behavior for all of the compositions. The highest conductivity observed for x= 0.2 sample can be attributed to lower activation energy.

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Manganese-doped bismuth vanadate solid electrolytes

Abstract: Part 1.-Synthesis and characterization of Bi , (0.1∏x∏0.25

Cited by 29 publications

References 18 publications

A New Bi₄Mn_1/3W_2/3O₈Cl Sillén–Aurivillius Intergrowth: Synthesis and Structural Characterisation by Quantitative Transmission Electron Microscopy

A New Bi₄Mn_1/3W_2/3O₈Cl Sillén–Aurivillius Intergrowth: Synthesis and Structural Characterisation by Quantitative Transmission Electron Microscopy

Probing Oxygen Motion in Disordered Anionic Conductors with ¹⁷ O and ⁵¹ V MAS NMR Spectroscopy

Ionic conductivity and structural properties of MnO-doped Bi4V2O11 system

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Manganese-doped bismuth vanadate solid electrolytes

Abstract: Part 1.-Synthesis and characterization of Bi , (0.1∏x∏0.25

Cited by 29 publications

References 18 publications

A New Bi4Mn1/3W2/3O8Cl Sillén–Aurivillius Intergrowth: Synthesis and Structural Characterisation by Quantitative Transmission Electron Microscopy

A New Bi4Mn1/3W2/3O8Cl Sillén–Aurivillius Intergrowth: Synthesis and Structural Characterisation by Quantitative Transmission Electron Microscopy

Probing Oxygen Motion in Disordered Anionic Conductors with 17 O and 51 V MAS NMR Spectroscopy

Ionic conductivity and structural properties of MnO-doped Bi4V2O11 system

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A New Bi₄Mn_1/3W_2/3O₈Cl Sillén–Aurivillius Intergrowth: Synthesis and Structural Characterisation by Quantitative Transmission Electron Microscopy

A New Bi₄Mn_1/3W_2/3O₈Cl Sillén–Aurivillius Intergrowth: Synthesis and Structural Characterisation by Quantitative Transmission Electron Microscopy

Probing Oxygen Motion in Disordered Anionic Conductors with ¹⁷ O and ⁵¹ V MAS NMR Spectroscopy