A5019872565- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Retinal Diseases and Treatments
- Geotechnical Engineering and Soil Stabilization
- Electron and X-Ray Spectroscopy Techniques
- Glaucoma and retinal disorders
- Retinal and Macular Surgery
- Geotechnical Engineering and Analysis
- Inorganic Fluorides and Related Compounds
- Geotechnical Engineering and Underground Structures
- Extraction and Separation Processes
- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Intraocular Surgery and Lenses
- Welding Techniques and Residual Stresses
- Retinal Imaging and Analysis
- Vacuum and Plasma Arcs
- Advancements in Solid Oxide Fuel Cells
- Retinal and Optic Conditions
- Antiplatelet Therapy and Cardiovascular Diseases
- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Metal and Thin Film Mechanics
Kyoto University
2016-2025
Nara Women's University
2022-2025
Oita University
2024
Kyushu University
2009-2023
Subaru (Japan)
2022
Nagoya University
2014-2021
Kogakuin University
2021
Tokyo Medical University
2021
Mitsui Chemicals (Japan)
2021
Osaka University
1973-2020
Abstract Rechargeable magnesium batteries are poised to be viable candidates for large-scale energy storage devices in smart grid communities and electric vehicles. However, the density of previously proposed rechargeable is low, limited mainly by cathode materials. Here, we present new design approaches order realize a high-energy-density battery system. Ion-exchanged MgFeSiO 4 demonstrates high reversible capacity exceeding 300 mAh·g −1 at voltage approximately 2.4 V vs. Mg. Further,...
Developing electrochemical high-energy storage systems is of crucial importance toward a green and sustainable energy supply. A promising candidate fluoride-ion batteries (FIBs), which can deliver much higher volumetric density than lithium-ion batteries. However, typical metal fluoride cathodes with conversion-type reactions cause low-rate capability. Recently, layered perovskite oxides oxyfluorides, such as LaSrMnO4 Sr3Fe2O5F2, have been reported to exhibit relatively high rate performance...
The methods used to model thermal plasmas, including treatments of diffusion in arcs gas mixtures, are reviewed. influence thermophysical properties on the parameters tungsten–inert-gas (TIG) welding arcs, particularly those that affect weld pool, is investigated using a two-dimensional which arc, anode and cathode included self-consistently. effect changing each six characteristics an argon TIG arc assessed. product specific heat mass density found be important determining constriction. By...
Abstract Composite electrodes containing active materials, carbon and binder are widely used in lithium-ion batteries. Since the electrode reaction occurs preferentially regions with lower resistance, distribution can be happened within composite electrodes. We investigate relationship between depth direction electronic/ionic conductivity changing porosities. Two dimensional X-ray absorption spectroscopy shows that is porosity Our developed 6-probe method measure The ionic decreased for...
A gas tungsten arc (GTA) was modelled taking into account the contamination of plasma by metal vapour from molten anode. The whole region GTA atmosphere including cathode, and anode treated using a unified numerical model. viscosity approximation used to express diffusion coefficient in terms shielding vapour. transient two-dimensional distributions temperature, velocity flow iron concentration were predicted, together with pool as function time for 150 current at atmospheric pressure, both...
New record efficiencies have been achieved on Cd-free Cu(In,Ga)(Se,S)2 thin-film photovoltaic submodules prepared by a two-step sulfurization after selenization process. Aperture area of 19.2% and 19.8% were independently confirmed 30 cm × submodule (841 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ) 7 5 minimodule (24.2 ), respectively. These achievements brought about transferring several key techniques, especially atomic layer...
Abstract Most solid-state materials are composed of p-block anions, only in recent years the introduction hydride anions (1s 2 ) oxides (e.g., SrVO H, BaTi(O,H) 3 has allowed discovery various interesting properties. Here we exploit large polarizability (H – together with chalcogenide (Ch 2– to construct a family antiperovskites soft anionic sublattices. The M HCh (M = Li, Na) adopt ideal cubic structure except orthorhombic Na HS, despite variation sizes and Ch. This unconventional...
This paper focuses mainly on the stability of a square tunnel in cohesive–frictional soils subjected to surcharge loading. Large-size noncircular tunnels are quickly becoming widespread building technology by virtue development advanced tunneling machines. The loading has been investigated theoretically and numerically, assuming plane strain conditions. Despite importance this problem, previous research subject is very limited. At present, no generally accepted design or analysis method...
For the study of ferromagnetic materials which are compatible with group-IV semiconductor spintronics, we demonstrate control properties Heusler-alloy Fe3-xMnxSi epitaxially grown on Ge(111) by tuning Mn composition x. Interestingly, obtain L2(1)-ordered structures even for nonstoichiometric atomic compositions. The Curie temperature epilayers x approximately 0.6 exceeds 300 K. Theoretical calculations indicate that electronic alloys become half-metallic 0.75 < or = 1.5. We discuss...
To investigate the diurnal variations of ocular blood flow in healthy eyes using laser speckle flowgraphy (LSFG), and to determine relationship between other parameters.This prospective cross-sectional study was conducted at Nagoya University Hospital. We studied 13 volunteers whose mean age 33.5 ± 7.6 years. The blur rate (MBR), expressing relative flow, on optic nerve head (ONH) choroidal determined by LSFG (LSFG-NAVI) every 3 hours from 6:00 24:00 hours. intraocular pressure (IOP),...
Purpose: The purpose of this study was to evaluate foveal regeneration and the association between retinal restoration visual acuity following reattachment surgery for rhegmatogenous detachment (RRD). Methods: Twenty-nine eyes 29 patients with successfully reattached macula-off RRD were retrospectively analyzed. We used spectral-domain optical coherence tomography image macular regions measure thickness Snellen chart (VA) best-corrected VA (BCVA) at 1, 2, 3, 6, 9, 12 months after vitrectomy....
In sheet-type all-solid-state lithium-ion batteries with the sulfide-based solid electrolyte, composite electrodes consist of active material, conductive additive and binder. Thus, they form a three-dimensional ionic electronic conduction pass. electrodes, reaction inhomogeneity derived from their morphology exerts remarkable effect on battery performance. this study, we prepared for electrolyte using different binder materials solvents investigated distribution within 2D-imaging X-ray...
Recently, several sulfide solid electrolytes have been synthesized by liquid-phase synthesis for the commercialization of all-solid-state batteries. Unfortunately, ionic conductivity most these is unsatisfactory compared to that conventional ball milling. This problem attributed different mechanisms between liquid phase and in reaction formation. However, best our knowledge, effect solvent on has not extensively investigated, although identification properties a key point understanding...
All-solid-state lithium batteries that use metal as the anode have extremely high energy densities. However, for anodes to be used, dendrite formation must addressed. Recently, addition of iodide (LiI) sulfide solid electrolytes was found suppress formation. It is unclear whether cause this suppression improvement ionic conductivity electrolyte itself or electrochemical properties metal/solid interface. In study, quantitatively elucidated. The effect interphase on growth doping LiI into...
Surface coating on lithium‐ion battery cathodes improves their durability at high potentials, which is a well‐known practical application. However, the mechanism still unclear because influences electrode/electrolyte interface few nanometer‐scale and direct observation of under real operating conditions challenging. This study reveals surface effect by using in operando X‐ray absorption spectroscopy (XAS) well‐defined MgO‐coated LiCoO 2 thin‐film electrodes prepared via pulsed laser...
For the further development of lithium-ion batteries, improvement their cyclic performance is crucial. However, mechanism underlying deterioration battery not fully understood. We investigated effects electronic structure at electrode/electrolyte interface on cathode materials via in situ total-reflection fluorescence X-ray absorption spectroscopy. In a LiCoO2 thin-film electrode that exhibits gradual upon subsequent Li ion extractions and insertions (cycling), reduction Co ions was observed...
Electrochemically de-lithiated Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>, are investigated as high-voltage (∼3.0 V <italic>vs.</italic> Mg/Mg<sup>2+</sup>) cathode hosts for Mg<sup>2+</sup> (de)-intercalation. The exceptional high voltage surpasses the hitherto reported values of cathodes magnesium batteries.
Lifetimes of lithium-ion batteries are often affected by deterioration positive electrodes. It is well-known that the electrodes can be reduced using electrolyte additives; however, mechanism underlying this cyclability improvement needs to clarified. In study, we investigate electronic structure at electrode/electrolyte interface in situ total-reflection fluorescence X-ray absorption spectroscopy elucidate a LiCoO2 electrode upon addition vinylene carbonate (VC) electrolyte. The results...
Li2FeSiO4 is a promising cathode material for lithium ion batteries because of its theoretically high capacity if two ions can be extracted/inserted per formula unit; however, the extraction/insertion from remains challenge. Herein, we successfully synthesized carbon-coated nanoparticles which exhibit commensurate to reversible two-lithium at elevated temperature. This study investigates mechanism underlying in using synchrotron X-ray absorption spectroscopy and diffraction. Our results...