Microstructural Analysis of Interfaces between Lanthanum Contained Glass and Two Different Electrolytes for SOFC Applications

Kaur, Gurbinder; Pandey, O.P.; Singh, K.

doi:10.1002/fuce.201200080

Cited by 16 publications

(7 citation statements)

References 48 publications

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“…It has been reported in the literature that at high temperatures, grain boundaries can coalesce, leading to an increase in particle sizes and a decrease in their associated FWHM. 44,45 This series of XRD patterns agrees with this hypothesis, indicating a thermally driven interaction of the coating with the surfaces of the LNMO particles.…”

Section: Xrd Analyses Of the Cathode Particlessupporting

confidence: 76%

“…When θ new < θ initial at elevated temperatures, there is a corresponding increase in d and a change in the lattice parameters . The FWHM of the corresponding peaks can be described as normalF normalW normalH normalM = k λ / L .25em nobreak0em0.25em⁢ cos nobreak0em.25em⁡ θ where L is the particle size, and k is the crystallite shape factor (e.g., a good approximation is a value of 0.9). , The trends for FWHM did not exhibit a significant change with an increase in temperature for the HT-XRD analyses of the bare LNMO particles, which indicated that the particle size remained consistent up to 900 °C. Figure depicts the XRD plots for pristine, LZ25-coated, LZ50-coated, and LZ75-coated LNMO particles at RT.…”

Section: Resultsmentioning

confidence: 98%

“…where L is the particle size, and k is the crystallite shape factor (e.g., a good approximation is a value of 0.9). 44,45 The trends for FWHM did not exhibit a significant change with an increase in temperature for the HT-XRD analyses of the bare LNMO particles, which indicated that the particle size remained consistent up to 900 °C. Figure 3 depicts the XRD plots for pristine, LZ25-coated, LZ50-coated, and LZ75-coated LNMO particles at RT.…”

Section: Xrd Analyses Of the Cathode Particlesmentioning

confidence: 94%

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Unraveling the Role of Composite Li₃PO₄/ZrO₂ Coatings Prepared by Dry Milling on High Voltage Spinel Cathodes for Lithium-Ion Batteries: Insights into Lattice Strain, Thermal Behavior, Material Compatibility, and Electrochemical Performance

Kaur

Nesvaderani²,

Hadidi³

et al. 2022

ACS Appl. Energy Mater.

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In the present investigation, three composite coatings for high voltage spinels were prepared from Li3PO4:ZrO2 (with varying loadings of zirconia, ZrO2, and lithium phosphate, Li3PO4) using ball milling techniques. The coatings were prepared on high voltage spinel LNMO (LiNi0.5Mn1.5O4) using mechanical mixing, and the samples were heated at 600 °C to achieve a uniform, crystalline coating. A coating referred to as LZ75 (75 wt % zirconia and 25 wt % Li3PO4) exhibited the highest relative weight stability and a lower heat of reaction than other ratios of ZrO2 and Li3PO4 prepared for these custom coatings on LNMO. X-ray photoelectron spectroscopy indicated the presence of zirconia and phosphorous on the LNMO surfaces. Band gap studies indicated a decrease in the direct and indirect band gaps for the coatings with a higher ZrO2 content, which could enhance conductivity in the material. In contrast to this, the Urbach energy (E u) yielded a reverse trend and followed the order (LNMO) < (LZ25-coated LNMO) < (LZ50-coated LNMO) < (LZ75-coated LNMO). Electron microscopy studies indicated a change in morphology for the coated LNMO, especially for the LZ75-coated LNMO. Additional studies evaluated bare and coated LNMO for their stability in the presence of LiPF6 electrolyte. Scanning electron microscopy and X-ray diffraction analyses of the LNMO/LiPF6 interfaces for the coated and bare cathode materials indicated that the coating tends to suppress Mn dissolution in comparison to the uncoated LNMO. Additionally, more phases were seen in the LNMO/LiPF6 interface than for the coated LNMO materials. Electrochemical performance depicted an enhanced capacity retention of up to 88.5% for the LZ75-coated LNMO, compared to 69.2% for pristine LNMO after 100 cycles at 1 C (3–5 V vs Li/Li+). The lithium-ion diffusion coefficient (D Li+ ) also exhibited a significant increase in the coated cathodes along with a decrease in the charge transfer resistance and surface film resistance.

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Section: Xrd Analyses Of the Cathode Particlessupporting

confidence: 76%

Section: Resultsmentioning

confidence: 98%

Section: Xrd Analyses Of the Cathode Particlesmentioning

confidence: 94%

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Unraveling the Role of Composite Li₃PO₄/ZrO₂ Coatings Prepared by Dry Milling on High Voltage Spinel Cathodes for Lithium-Ion Batteries: Insights into Lattice Strain, Thermal Behavior, Material Compatibility, and Electrochemical Performance

Kaur

Nesvaderani²,

Hadidi³

et al. 2022

ACS Appl. Energy Mater.

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“…Ca 2+ , La 3+ and Sr 2+ have diffused considerably out of the glass composite matrix. Usually the zirconate phases form at the interface . In spite of diffusion of the strontium and calcium, no strontium/calcium zirconate could be seen at the joint region.…”

Section: Resultsmentioning

confidence: 99%

Thermal stress simulation and chemical compatibility of glass composite seals with YSZ for solid oxide fuel cells

Kaur

Pickrell

Cheng

2015

Int. J. Energy Res.

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The selection of the components is important for the solid oxide fuel cells (SOFC) in order to address the sealing issues. In the present investigation, the glass composite seals have been prepared by mixing the different glass compositions in fixed ratio and then ball milling for 5 h without using any unreactive particle in glass matrix. The chemical compatibility of the prepared glass composites with the solid electrolyte yttria stabilized zirconia (YSZ) has been studied using the scanning electron microscope (SEM) and dot-mapping techniques. The interfacial study has revealed that all the glass composites except GG5 have shown good adhesion along with no undesired chemical reaction at the interfaces. Furthermore, the thermal stress generated within the glass composite/YSZ diffusion couple has been simulated for 10 000 h heat-treatment at 800°C along with its magnitude using the COMSOL multiphysics analysis. Interestingly, for all the diffusion couples, the stress is within the acceptable limit, but for the GG5 composite/YSZ couple, the stress varies between 6 and 529 N/m 2 . In addition to this, for the GG5 composite/YSZ couple, the interface exhibits a high stress zone, which shows good correlation with the microstructural analysis.

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“…The molar ratio of silicon to total network former is represented by X Si assuming that no BO 4 are linked to each other [19]. One other term, which gives the probability of silicate coordinated to BO 4 is given as: …”

Section: Glass Network Connectivitymentioning

confidence: 99%

Interaction Study of Yttria‐Based Glasses with High‐Temperature Electrolyte for SOFC

et al. 2014

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The chemical interaction study of AO–SiO2–B2O3–Y2O3 (A = Ba, Sr) (BaY, SrY) glass with high‐temperature electrolyte yttria‐stabilized zirconia (YSZ 8 mol%) is reported as a function of different heat treatment durations. The as‐prepared glass with 10 mol% of yttria shows limited amount of crystallization at 800 °C. Due to this yttria‐based glasses BaY and SrY have been chosen to make diffusion couples with high‐temperature electrolyte and interconnect material. These diffusion couples have been heat treated at 850 °C, for 100, 200, and 500 h. The heat‐treated diffusion couples have been characterized using X‐ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). Microstructural analysis of diffusion couples shows absence of any undesired oxides and detrimental reaction products at the interface. The glass has shown good bonding characteristics and absence of cracks, pores, or any kind of delamination from YSZ. Apart from this, SrY and BaY glass seals have also shown good adhesion characteristics with Crofer 22 APU, even after 500 h at 850 °C. The morphology and microstructure of the glass matrix suggest limited amount of devitrification in the glass.

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Microstructural Analysis of Interfaces between Lanthanum Contained Glass and Two Different Electrolytes for SOFC Applications

Cited by 16 publications

References 48 publications

Unraveling the Role of Composite Li₃PO₄/ZrO₂ Coatings Prepared by Dry Milling on High Voltage Spinel Cathodes for Lithium-Ion Batteries: Insights into Lattice Strain, Thermal Behavior, Material Compatibility, and Electrochemical Performance

Unraveling the Role of Composite Li₃PO₄/ZrO₂ Coatings Prepared by Dry Milling on High Voltage Spinel Cathodes for Lithium-Ion Batteries: Insights into Lattice Strain, Thermal Behavior, Material Compatibility, and Electrochemical Performance

Thermal stress simulation and chemical compatibility of glass composite seals with YSZ for solid oxide fuel cells

Interaction Study of Yttria‐Based Glasses with High‐Temperature Electrolyte for SOFC

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Microstructural Analysis of Interfaces between Lanthanum Contained Glass and Two Different Electrolytes for SOFC Applications

Cited by 16 publications

References 48 publications

Unraveling the Role of Composite Li3PO4/ZrO2 Coatings Prepared by Dry Milling on High Voltage Spinel Cathodes for Lithium-Ion Batteries: Insights into Lattice Strain, Thermal Behavior, Material Compatibility, and Electrochemical Performance

Unraveling the Role of Composite Li3PO4/ZrO2 Coatings Prepared by Dry Milling on High Voltage Spinel Cathodes for Lithium-Ion Batteries: Insights into Lattice Strain, Thermal Behavior, Material Compatibility, and Electrochemical Performance

Thermal stress simulation and chemical compatibility of glass composite seals with YSZ for solid oxide fuel cells

Interaction Study of Yttria‐Based Glasses with High‐Temperature Electrolyte for SOFC

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Product

Resources

About

Unraveling the Role of Composite Li₃PO₄/ZrO₂ Coatings Prepared by Dry Milling on High Voltage Spinel Cathodes for Lithium-Ion Batteries: Insights into Lattice Strain, Thermal Behavior, Material Compatibility, and Electrochemical Performance

Unraveling the Role of Composite Li₃PO₄/ZrO₂ Coatings Prepared by Dry Milling on High Voltage Spinel Cathodes for Lithium-Ion Batteries: Insights into Lattice Strain, Thermal Behavior, Material Compatibility, and Electrochemical Performance