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Fabrication of hierarchical sapphire nanostructures using ultrafast laser induced morphology change.
Nanotechnology
January 2025
Walker Department of Mechanical Engineering, The University of Texas at Austin, 204 E. Dean Keeton St., Austin, Texas, 78712-1139, UNITED STATES.
Sapphire is an attractive material in photonic, optoelectronic, and transparent ceramic applications that stand to benefit from surface functionalization effects stemming from micro/nanostructures. Here we investigate the use of ultrafast lasers for fabricating nanostructures in sapphire by exploring the relationship between irradiation parameters, morphology change, and selective etching. In this approach an ultrafast laser pulse is focused on the sapphire substrate to change the crystalline morphology to amorphous or polycrystalline, which is characterized by examining different vibrational modes using Raman spectroscopy.
View Article and Find Full Text PDFSpray-Flame Synthesis (SFS) and Characterization of LiAlYTi(PO) [LA(Y)TP] Solid Electrolytes.
Nanomaterials (Basel)
December 2024
Institute for Energy and Materials Processes-Reactive Fluids, University of Duisburg-Essen, 47057 Duisburg, Germany.
Solid-state electrolytes for lithium-ion batteries, which enable a significant increase in storage capacity, are at the forefront of alternative energy storage systems due to their attractive properties such as wide electrochemical stability window, relatively superior contact stability against Li metal, inherently dendrite inhibition, and a wide range of temperature functionality. NASICON-type solid electrolytes are an exciting candidate within ceramic electrolytes due to their high ionic conductivity and low moisture sensitivity, making them a prime candidate for pure oxidic and hybrid ceramic-in-polymer composite electrolytes. Here, we report on producing pure and Y-doped Lithium Aluminum Titanium Phosphate (LATP) nanoparticles by spray-flame synthesis.
View Article and Find Full Text PDFEnhancing Quasi-Solid-State Lithium-Metal Battery Performance: Multi-Interlayer, Melt-Infused Lithium and Lithiophilic Coating Strategies for Interfacial Stability in Li||VS-DSGNS-LATP|PEO-PVDF||NMC622-AlO Systems.
ACS Appl Mater Interfaces
January 2025
Advanced Functional Nanomaterials Research Laboratory, Centre for Nanoscience and Technology, Madanjeet School of Green Energy Technologies, Pondicherry University (A Central University), Dr. R. Venkataraman Nagar, Kalapet, Puducherry 605014, India.
The development of quasi-solid-state lithium metal batteries (QSSLMBs) is hindered by inadequate interfacial contact, poor wettability between electrodes and quasi-solid-state electrolytes, and significant volume changes during long-term cycling, leading to safety risks and cataclysmic failures. Here, we report an innovative approach to enhance interfacial properties through the construction of QSSLMBs. A multilayer design integrates a microwave-synthesized LiAlTi(PO) (LATP) ceramic electrolyte, which is surface-coated with a lithiophilic conductive ink comprising VS and disulfonated functionalized graphene nanosheets (VS-DSGNS) using a low-cost nail-polish binder.
View Article and Find Full Text PDFDesign and Fabrication of a Patch Antenna for 5G Wireless Communications from a Low-Permittivity LiAlSiO-Based Ceramic.
ACS Appl Mater Interfaces
January 2025
Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices, College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China.
A microwave dielectric ceramic based on lithium aluminum silicate (LiAlSiO) with ultralow permittivity was synthesized using the traditional solid-state reaction technique, and its dielectric characteristics at microwave frequencies are presented. The nominal LiAlSiO ceramic exhibited a relative permittivity of 3.95.
View Article and Find Full Text PDFCoordination Regulation Enabling Deep Eutectic Electrolyte for Fast-Charging High-Voltage Lithium Metal Batteries.
Adv Mater
December 2024
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
The safety and cycle stability of lithium metal batteries (LMBs) under conditions of high cut-off voltage and fast charging put forward higher requirements for electrolytes. Here, a sulfonate-based deep eutectic electrolyte (DEE) resulting from the eutectic effect between solid sultone and lithium bis(trifluoromethanesulfonyl)imide without any other additives is reported. The intermolecular coordination effect triggers this eutectic phenomenon, as evidenced with nuclear magnetic resonance, and thus the electrochemical behavior of the DEE can be controlled by jointly regulating the coordination effects of F···H and Li···O intermolecular interactions.
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