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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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Structure and Properties of Na 2 S–SiS 2 –P 2 S 5 –NaPO 3 Glassy Solid Electrolytes
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Machine-Learning-Guided Insights into Solid-Electrolyte Interphase Conductivity: Are Amorphous Lithium Fluorophosphates the Key?
Despite decades of study, the identity of the dominant Li + -conducting phase within the inorganic SEI of Li-ion batteries remains unresolved. While the mosaic model describes LiF/Li 2 O/Li 2 CO 3 nanocrystallites within a disordered matrix, these crystalline phases inherently offer limited ionic conductivity. Growing evidence suggests that interfaces, grain boundaries, and amorphous phases may instead host the primary fast-ion pathways. Using diffusion-based generative structure prediction and machine-learning interatomic potentials (MLIPs), we investigate lithium difluorophosphate (LiPO 2 F 2 ), a key mixed-anion decomposition product of phosphorus- and fluorine-containing electrolytes. We identify a stable crystalline polymorph and demonstrate that the amorphous counterpart is conductive, with projected room-temperature σ ≈ 0.18 mS cm –1 and E a ≈ 0.40 eV. Here, this enhancement stems from structural disorder flattening the Li site-energy landscape and a low formation energy for Li-interstitial defects, which supplies additional mobile carriers. We propose amorphous mixed-anion Li-P-O-F phases as a promising conducting medium in the SEI, offering a specific target for engineering improved battery interfaces.
Imaging the evolution of lithium-solid electrolyte interface using operando scanning electron microscopy
Not Available
High lithium oxide prevalence in the lithium solid–electrolyte interphase for high Coulombic efficiency
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In operando Raman microscopy of the Cu/Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 solid electrolyte interphase
In operando Raman microscopy has revealed that the reduction of Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) to Ge particles surrounded by Li-phosphates occurs in reaction hotspots at the Cu/LAGP interface.
Revealing unprecedented cathode interface behavior in all-solid-state batteries with oxychloride solid electrolytes
The superionic conductor, lithium tantalum oxychloride (LTOC), exhibits unprecedented stability with Co-lean and Ni-rich cathodes, while lowering the working temperature proves effective in regulating the Co-rich cathode interface with LTOC.
Highly uniform nitride-rich artificial solid electrolyte interphase enabled by nano-silicon nitride for superior performance in advanced sodium metal batteries
A highly uniform Na 3 N-rich SEI layer, formed by nano-sized Si 3 N 4 , drastically improves sodium-metal battery performance by enhancing stability, inhibiting dendrite growth, and extending cycling life to over 5.5× (>1100 hours).
Investigating the Electronic Conductivity of NaSICON Solid Electrolyte
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Simulating Radiation Damage in Solid Electrolytes
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Towards Dendrite-Resistant LLZO-based Solid Electrolytes: Insights from Multiscale Simulation
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Simulating solid electrolyte interphase formation spanning 10 8 time scales with an atomically informed phase-field model
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Electrodeless electrolysis of solid electrolytes Semiannual progress report, 1 Nov. 1967 - 31 May 1968
Glow discharge electrolysis of fused electrolytes
Striped Electrodes for Solid-Electrolyte Cells
Striped thick-film platinum electrodes help insure lower overall cell resistance by permitting free flow of gases in gaps between stripes. Thickfilm stripes are also easier to fabricate than porous thin-film electrodes that cover entire surface. Possible applications for improved cells include oxygen production from carbon dioxide, extraction of oxygen from air, small fluidic pumping, sewage treatment, and fuel cells.