A5023011533- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Thermal Expansion and Ionic Conductivity
- Antenna Design and Analysis
- Particle physics theoretical and experimental studies
- Energy Harvesting in Wireless Networks
- Wireless Power Transfer Systems
- Solid-state spectroscopy and crystallography
- Radio Frequency Integrated Circuit Design
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Antenna Design and Optimization
- Advanced Antenna and Metasurface Technologies
- Wireless Communication Networks Research
- AI-based Problem Solving and Planning
- Crystallization and Solubility Studies
- Electromagnetic Compatibility and Measurements
- Zeolite Catalysis and Synthesis
- Indoor and Outdoor Localization Technologies
- Advanced Wireless Communication Techniques
- Inorganic Chemistry and Materials
- Advanced Power Amplifier Design
- Scientific Research and Discoveries
- Vehicle emissions and performance
Battery Park
2021-2025
Institute of Science Tokyo
2025
Institute of Materials Science
2025
Tokyo Institute of Technology
2015-2024
Innovative Research (United States)
2020
Kajima Corporation (Japan)
2003-2019
University of Fukui
1957-2016
NEC (Japan)
2004-2014
Ministry of Transportation of Ontario
2014
Toyota Motor Corporation (Switzerland)
2014
No design rules have yet been established for producing solid electrolytes with a lithium-ion conductivity high enough to replace liquid and expand the performance battery configuration limits of current lithium ion batteries. Taking advantage properties high-entropy materials, we designed highly ion-conductive electrolyte by increasing compositional complexity known superionic conductor eliminate migration barriers while maintaining structural framework conduction. The synthesized phase...
Ionic conductivity and stability of Li-ion conductors are rationalized on the same footing using lattice-dynamics descriptors.
Abstract Ever since the first report on Li 10 GeP 2 S 12 (LGPS) in 2011, its unique structure and exceptionally high lithium conductivity (>1 × −2 cm −1 ) have attracted extensive interest, especially for applications solid‐state ionics batteries. Herein, studies of LGPS modifications are reviewed with a focus synthesis, structure, ionic transportation LGPS. For material relationships between precursor compounds such as 3 PS 4 GeS discussed. A technique single‐crystal growth family...
All-solid-state batteries are intensively investigated, although their performance is not yet satisfactory for large-scale applications. In this context, the combination of Li10GeP2S12 solid electrolyte and LiNi1-x-yCoxMnyO2 positive electrode active materials considered promising despite unsatisfactory battery induced by thermodynamically unstable electrode|electrolyte interface. Here, we report electrochemical spectrometric studies to monitor interface evolution during cycling understand...
Solid solutions of Sn–Si derivatives with an LGPS (Li10GeP2S12)-type structure are synthesized by a solid-state reaction in the Li3PS4–Li4SnS4–Li4SiS4 quasi-ternary system. The monophasic region LGPS-type deviates from tie line between Li10SiP2S12 and Li10SnP2S12, composition solid solution is determined to be −0.1 ≤ δ 0.5 0 y 1.0 Li10+δ[SnySi1–y]1+δP2−δS12 (0.50 x 0.7 Li4–x[SnySi1–y]1–xPxS4). formed double substitution that changes Sn/Si ratio M4+ (Sn4+ Si4+)/P5+ ratio, which adjusts sizes...
Solid solutions of the silicon and tin analogous phases superionic conductor Li<sub>10</sub><italic>M</italic>P<sub>2</sub>S<sub>12</sub> (<italic>M</italic> = Si, Sn) were synthesized by a conventional solid-state reaction in an evacuated silica tube at 823 K. The ranges solid determined to be 0.20 < <italic>δ</italic> 0.43 −0.25 −0.01 Li<sub>10+δ</sub><italic>M</italic><sub>1+δ</sub>P<sub>2−δ</sub>S<sub>12</sub> (0.525 ≤ <italic>k</italic> 0.60 0.67 0.75...
Single crystals of the lithium-ion conductor Li10GeP2S12 have been successfully grown by self-flux method and are studied means X-ray diffraction impedance spectroscopy. The weak anisotropic ionic conductivity is observed to be 27 7 mS cm–1 in [001] [110] directions, respectively, at room temperature. Markedly, however, activation energies nearly equal, approximately 0.3 eV, two which that common diffusion paths along dominate long-range Li10GeP2S12.
A phase diagram is constructed for the quasi‐binary Li 4 GeS –Li 3 PS system containing lithium superionic conductor 10 GeP 2 S 12 ( LGPS ), having an ‐type structure, and β‐Li phase, a thio‐ LISICON structure. The intermediate compounds are found to exhibit solid solution ranges show incongruent melting at 650°C 560°C, respectively. end‐member has compositional range of 0 < k 0.3 in [(1− ) + ], while other γ‐Li no range. crystal structures appearing binary systems α‐, β‐, γ‐type these...
Lithium superionic conductors with the Li10GeP2S12 (LGPS)-type structure are promising materials for use as solid electrolytes in next-generation lithium batteries. A novel member of LGPS family, Li9.42Si1.02P2.1S9.96O2.04, and its solutions were synthesised by quenching from 1273 K Li2S–P2S5–SiO2 pseudoternary system. The material exhibited an ionic conductivity high 3.2×10−4 S cm−1 at 298 K, well electrochemical stability to metal, which was improved introduction oxygen into LGPS-type...
Solid-state electrolytes that exhibit high ionic conductivities at room temperature are key materials for obtaining the next generation of safer, higher-specific-energy solid-state batteries. However, number currently available crystal structures use as superionic conductors remains limited. Here, we report a lithium conductor, Li2SiS3, with tetragonal symmetry, which possesses new three-dimensional framework structure consisting isolated edge-sharing tetrahedral dimers. This species...
Electrochemical impedance spectroscopy (EIS) will assist the development of all-solid-state lithium batteries by identifying their performance limiting resistances, although an elaborate distinction method has not been established to date. Herein, distribution-of-relaxation-times was used support quantification and understanding EIS data, which were compiled over various temperatures states charge (SOCs) for cells with In–Li anode, coated-LiCoO2 composite cathode, separator comprising two...
Unique interstitial Li<sup>+</sup> and O<sup>2−</sup>/S<sup>2−</sup> site disorder lower the percolation threshold for 3D Li-ion diffusion in lithium argyrodite Li<sub>6.15</sub>Al<sub>0.15</sub>Si<sub>1.35</sub>S<sub>6−x</sub>O<sub>x</sub> (LASSO).
A combination of single-crystal neutron diffraction experiments at low temperature and first-principles calculations revealed that a correlated migration the densely packed Li ions governs overall Li-ion conduction in Li<sub>10</sub>GeP<sub>2</sub>S<sub>12</sub>.
The crystal structures of the superionic conductors Li 9.81 Sn 0.81 P 2.19 S 12 and 10.35 Si 1.35 1.65 , both having a 10 GeP 2 (LGPS)-type structure, were determined by neutron diffraction analysis over temperature range 12–800 K. maximum entropy method was also employed to clarify lithium distribution in these materials. system showed one-dimensional diffusion c direction wide range, even though Ge-based typically exhibits three-dimensional conduction at higher temperatures. ionic...
Li9.54Si1.74P1.44S11.7Cl0.3 (LSiPSCl), which exhibits a Li10GeP2S12 (LGPS)-type structure, presents the highest reported Li-ion conductivity for solid electrolytes, but formation of secondary phase and limited electrochemical stability restricts its performance in all-solid-state cells. Herein, oxygen atoms were substituted into LSiPSCl, monophasic LGPS-type solution was obtained (Li9.54Si1.74P1.44S11.7–zCl0.3Oz, LSiPSClOz; 0 < z ≤ 0.6). Compared with oxygen-substituted sample showed an...
All-solid-state Li-metal batteries require fast Li-ion conductors that are compatible with electrodes. Herein, we aim to obtain such in Li2S–P2S5–LiX (X = Br, I) systems, where new tetragonal phases P42/nmc symmetry were formed at compositions of Li10P3S12Br (LPSBr) and Li10.25P3S12.25I0.75 (LPSI). Rietveld refinement analyses indicated both materials structural analogues a renowned superionic conductor, Li10GeP2S12 (LGPS), additional anions 2a or 4c sites within LPSBr LPSI, respectively....
A new liquid-phase synthesis of the Li 10 GeP 2 S 12 -type phase in Li–Si–P–S–Cl system, which shows highest lithium ionic conductivity among reported Li-ion conductors, was developed for large-scale production.
Sulfide-based solid electrolytes have attracted considerable attention for application in solid-state lithium batteries because of their high ionic conductivities, suitable mechanical properties, and successful operation with various active anode cathode materials. However, sulfides react traces moisture to generate toxic H2S gas. This undesirable degradation reaction reduces conductivity, which is crucial batteries. To understand the effect on electrolyte particles, impedance spectroscopic...