Interfacial Compatibility of Glasses and Interconnects

Kaur, Gurbinder

doi:10.1007/978-3-319-25598-9_6

Cited by 3 publications

(5 citation statements)

References 23 publications

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“…For temperatures above 900 °C, some of the crystalline grains within the sample might start to fuse due to the onset of melting at the grain boundaries within the zirconate phase. 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. , 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: Resultssupporting

confidence: 87%

“…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%

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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: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 98%

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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“…Glasses contain an open random network, which is advantageous for Li + ion diffusion. [237][238][239] The relatively open structure within a glass is attributed to non-bridging oxygen atoms within its network due to its unique structural properties and stability. Lithium and boron containing compounds such as Li 2 O 3 -B 2 O 3 (LBO) have been widely used as coating materials because lithium and boron effectively reduce electrolyte decomposition in comparison to metal oxidebased coatings.…”

Section: Different Types Of Coatingsmentioning

confidence: 99%

“…240 It is expected that the LBO glass would evenly coat the surfaces of cathode materials due to the relatively low viscosity of its precursors and their good wetting properties. 237,240 A layered LiNi 0.8 Co 0.2 O 2 cathode coated with a Li 2 O-2B 2 O 3 glass reduced the self-discharge of this cathode, and increased its reversible capacity and stabilized its cycling performance. 240,241 Different loadings of Li 2 O-2B 2 O 3 glass on NMC 811 were prepared using a heat treatment method.…”

Section: Different Types Of Coatingsmentioning

confidence: 99%

Review—Surface Coatings for Cathodes in Lithium Ion Batteries: From Crystal Structures to Electrochemical Performance

Kaur

Gates

2022

J. Electrochem. Soc.

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Lithium ion batteries (LIBs) have dominated the energy industry due to their unmatchable properties, which include high energy density, compact design, and an ability to meet a number of required performance characteristics in comparison to other rechargeable systems. Both government agencies and industries are performing intensive research on Li-ion batteries for building an energy-sustainable economy. LIBs are single entities that consist of both organic and inorganic materials with features covering multiple length scales. Critical insights should be made for understanding the structure to property relationships and the behavior of components under the working condition of LIBs. Cathodes tend to react with the electrolytes and, hence, to undergo surface modifications accompanied by degradation. These side-reactions result in an erosion of battery performance, thereby causing a reduced battery life and power capacity. Recently, techniques for preparing surface coatings on cathode materials have been widely implemented as a measure to improve their stability, to enhance their electrochemical performance. This review will cover different types of surface coatings for cathode materials, as well as a comparison of the changes in electrochemical performance between those materials with and without an applied coating.

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“…The higher partial pressure of oxygen in the cathode gas can enhance the stack electrical efficiency. The rational reason that explains this is the improved electrochemical reaction, Nernst voltage, and reduced overpotentials. , Grounded on this, it has been shown in our previous work that utilization of oxygen-enriched air, instead of natural air, may, to some extent, compensate the negative consequences caused by surplus air exploitation in the SOFC stack for cooling. However, since air treatment imposes extra process costs, the process economics has also been assessed in ref to figure out the practical margins.…”

Section: Results and Discussionmentioning

confidence: 82%

System Level Exergy Assessment of Strategies Deployed for Solid Oxide Fuel Cell Stack Temperature Regulation and Thermal Gradient Reduction

Tang

Amiri

Tadé

2019

Ind. Eng. Chem. Res.

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Several operational strategies for Solid Oxide Fuel Cell (SOFC) temperature regulation and temperature gradient minimization at cell scale have previously been assessed by the authors (Amiri et al., Ind. Eng. Chem. Res., 2016). The application of such strategies at system scale, however, requires a numerical linkage between the cell and system performance metrics allowing simultaneous evaluation of the dominant process interactions. The objective of this study is to analytically examine the effectiveness and applicability of the mentioned thermal management methods at system scale. To achieve this, a system level exergy analysis is presented by using a modelling platform in which a detailed 4-cell short stack module and the Balance-of-Plant (BoP) are integrated. Linkage between the system performance metrics and the stack internal temperature gradient is specifically emphasized. For this, the exergy intensive points (unit operations) are identified throughout the plant. Subsequently, the effective strategies that had been employed for the cell level thermal management proposed in our previous work (Amiri et al., Ind. Eng. Chem. Res., 2016) are examined at the system level capturing the effects on the state of BoP exergy intensive components. Moreover, fuel design is proposed and evaluated as a potential thermal management strategy. Combination of variety of measures including the exergy destruction rates, the electrical and thermal efficiencies, and the stack internal temperature gradient provides a comprehensive set of data contributing to the SOFC system thermal management.

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Interfacial Compatibility of Glasses and Interconnects

Cited by 3 publications

References 23 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

Review—Surface Coatings for Cathodes in Lithium Ion Batteries: From Crystal Structures to Electrochemical Performance

System Level Exergy Assessment of Strategies Deployed for Solid Oxide Fuel Cell Stack Temperature Regulation and Thermal Gradient Reduction

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Interfacial Compatibility of Glasses and Interconnects

Cited by 3 publications

References 23 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

Review—Surface Coatings for Cathodes in Lithium Ion Batteries: From Crystal Structures to Electrochemical Performance

System Level Exergy Assessment of Strategies Deployed for Solid Oxide Fuel Cell Stack Temperature Regulation and Thermal Gradient Reduction

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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