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Results for “Amorphous”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Revealing the structure-property relationships of amorphous carbon tribofilms on platinum-gold surfaces
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Quantifying lithium loss in amorphous silicon thin-film anodes via titration-gas chromatography
Silicon with a high theoretical capacity (3,579 mAh/g) is a promising anode candidate for lithium-ion batteries. However, commercialization is still impeded by low Coulombic efficiency, caused by solid electrolyte interphase (SEI) formation and trapped lithium (Li)-silicon (Si) alloy during repeated volume change. Quantifying capacity losses from each factor is crucial to formulate rational design strategies for further improvement. In this work, titration-gas chromatography and cryogenic transmission electron microscopy are applied to characterize the evolution of trapped Li-Si alloy and SEI growth in a silicon thin-film anode. It is found that continuous growth of the SEI is the dominant factor for lithium inventory loss during cycling, with only a marginal increase in trapped Li-Si alloy. This study offers a quantitative approach to differentiate Li in the SEI from trapped Li in Li-Si alloy through a silicon thin-film anode, providing unique insights into identifying critical bottlenecks for developing Si anodes.
Surpassing the strength of metallogels with a rigid, amorphous metal-rich material formulation
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Mechanism of Saponite Crystallization from a Rapidly Formed Amorphous Intermediate
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Effect of Polymer Molecular Weight on the Crystallization Behavior of Indomethacin Amorphous Solid Dispersions
The influence of the molecular weight of polyvinylpyrrolidone (PVP) on the molecular mobility and physical stability of indomethacin (IMC)–PVP solid dispersions was investigated over a wide temperature range in the supercooled state. As the polymer molecular weight increased, there was a decrease in molecular mobility as evident from the longer α-relaxation times. Inhibition of IMC crystallization also increased as a function of polymer molecular weight. The extent of H-bonding interaction between drug and polymer, quantified by ssNMR, was independent of polymer molecular weight. Over a polymer concentration range of 5–20% w/w, the temperature dependence of mobility and viscosity was reasonably similar for different grades of PVP. Here, it was concluded that the increase in effectiveness in crystallization inhibition as a function of polymer molecular weight is due to the increased viscosity, which slows down the mobility of these systems.
Fluoride Doping in Crystalline and Amorphous Indium Oxide Semiconductors
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Weak Correlation between the Polyanion Environment and Ionic Conductivity in Amorphous Li–P–S Superionic Conductors
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Oxygen Transport through Amorphous Cathode Coatings in Solid-State Batteries
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Using Bulky Dodecaborane-Based Dopants to Produce Mobile Charge Carriers in Amorphous Semiconducting Polymers
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Structural Characteristics and Eutaxy in the Photo-Deposited Amorphous Iron Oxide Oxygen Evolution Catalyst
Abstract not provided
Role of Magnesium-Stabilized Amorphous Calcium Carbonate in Mitigating the Extent of Carbonation in Alkali-Activated Slag
Abstract not provided
Using Machine Learning To Identify Factors That Govern Amorphization of Irradiated Pyrochlores
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