A5029516654- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Advanced Thermoelectric Materials and Devices
- Thermal Expansion and Ionic Conductivity
- Advanced Battery Technologies Research
- Thermal properties of materials
- Solid-state spectroscopy and crystallography
- Crystallization and Solubility Studies
- Inorganic Chemistry and Materials
- Thermodynamic and Structural Properties of Metals and Alloys
- Optical properties and cooling technologies in crystalline materials
- X-ray Diffraction in Crystallography
- Rare-earth and actinide compounds
- Ferroelectric and Piezoelectric Materials
- Machine Learning in Materials Science
- Acoustic Wave Resonator Technologies
- Polyoxometalates: Synthesis and Applications
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Extraction and Separation Processes
- Fuel Cells and Related Materials
- Heusler alloys: electronic and magnetic properties
- Thermal Radiation and Cooling Technologies
- Crystal Structures and Properties
- Multiferroics and related materials
Tohoku University
2024-2025
Kyushu University
2020-2025
Justus-Liebig-Universität Gießen
2018-2021
Graduate School USA
2021
Northwestern University
2016-2018
California Institute of Technology
2014-2018
Pasadena City College
2014-2018
University of California, Davis
2014-2015
Solid-state batteries with inorganic solid electrolytes are currently being discussed as a more reliable and safer future alternative to the current lithium-ion battery technology. To compete state-of-the-art batteries, higher ionic conductivities needed, especially if thick electrode configurations be used. In search for optimized conductors, lithium argyrodites have attracted lot of interest. Here, we systematically explore influence aliovalent substitution in Li6+ xP1- xGe xS5I using...
All-solid-state lithium-ion batteries (ASSBs) are expected to represent a future alternative compared conventional with liquid electrolytes (LIBs). The excellent performance of today's LIBs relies large extent on the development that form stable, or at least slowly degrading, interfaces (interphases) both anodes and cathodes. This has not yet been achieved in ASSBs, degradation anode cathode solid (SE) is one key issues be solved. Unlike investigations liquid/solid interfaces, between...
The influence of grain boundaries is modelled to show that there much room for improvement in some thermoelectric materials.
All-solid-state batteries, employing inorganic ion conductors as electrolytes, can surpass the current Li-ion technology in terms of energy density, battery safety, specific power, well a fast-charging capability; however, highly conductive solid electrolyte is essential. While recent extensive explorations have led to list candidate materials, there are still enormous variations ionic conductivity even within same class indicating strong influence structural modifications on transport. In...
The optimum Mg<sub>3</sub>Sb<sub>2</sub>–Mg<sub>3</sub>Bi<sub>2</sub> alloy composition for thermoelectrics is modeled by analyzing transport properties and understanding changes in the electronic structure.
All-solid-state batteries are often expected to replace conventional lithium-ion in the future. However, practical electrochemical and cycling stability of best-conducting solid electrolytes, i.e. lithium thiophosphates, is still a critical issue that prevents long-term stable high-energy cells. In this study, we apply stepwise cyclic voltammetry approach obtain information on oxidative limit Li10GeP2S12, two different Li2S–P2S5 glasses, as well argyrodite Li6PS5Cl electrolytes. We employ...
Because of a remarkably high theoretical energy density, the lithium–sulfur (Li–S) battery has attracted significant attention as candidate for next-generation batteries. While employing solid electrolytes can provide new avenue high-capacity Li–S cells, all-solid-state batteries have unique failure mechanisms such chemomechanical due to volume changes active materials. In this study, we investigate model cells with differently processed cathode composites and elucidate typical mechanism...
ADVERTISEMENT RETURN TO ISSUEPREVViewpointNEXTHow Certain Are the Reported Ionic Conductivities of Thiophosphate-Based Solid Electrolytes? An Interlaboratory StudySaneyuki Ohno*Saneyuki OhnoInstitute Physical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, D-35392 GermanyCenter for Materials Research (LaMa), 16, Germany*Email: [email protected]More by Saneyuki Ohnohttp://orcid.org/0000-0001-8192-996X, Tim BerngesTim BerngesInstitute GermanyMore Bernges, Johannes...
Abstract Solid‐state lithium‐sulfur batteries (SSLSBs) have the potential to cause a paradigm shift in energy storage. The use of emerging highly‐conductive solid electrolytes enables high and power densities. However, need for an intimate mixture electrolyte conductive additives compensate insulating nature cathode active materials S 8 Li 2 induces intense degradation. Thus, it is paramount understand better electrochemical transport properties composite with extremely interface density...
Abstract Halide‐based solid electrolytes are currently growing in interest solid‐state batteries due to their high electrochemical stability window compared sulfide electrolytes. However, often a bilayer separator of and halide is used it unclear why such setup necessary, besides the instability halides against lithium metal. It shown that an electrolyte improves capacity retention as suppresses interfacial resistance growth monitored by impedance spectroscopy. By using in‐depth analytical...
Abstract The exploitation of high‐capacity conversion‐type materials such as sulfur in solid‐state secondary batteries is a dream combination for achieving improved battery safety and high energy density the push toward sustainable future. However, exact reason behind low rate‐capability, bottlenecking further development lithium–sulfur batteries, has not yet been determined. Here, using neutron imaging, spatial distribution lithium during cell operation directly visualized it shown that...
Recent work on superionic conductors has demonstrated the influence of lattice dynamics and softness ionic transport. When examining either changes in acoustic phonon spectrum or whole density states, both a decreasing activation barrier migration entropy have been observed, highlighting that paradigm "the softer lattice, better" does not always hold true. However, approaches to monitor changing probe different frequency ranges spectrum, thus, it is unclear if they are complementary. In this...
Zintl compound n-type Mg3(Sb,Bi)2 was recently found to exhibit excellent thermoelectric figure of merit zT (∼1.5 at around 700 K). To improve the performance in whole temperature range operation from room 720 K, we investigated how grain size sintered samples influences electronic and thermal transport. By increasing average 1.0 μm 7.8 μm, Hall mobility below 500 K significantly improved, possibly due suppression boundary scattering. We also confirmed that conductivity did not change by...
Complex multinary compounds (ternary, quaternary, and higher) offer countless opportunities for discovering new semiconductors applications such as photovoltaics thermoelectrics. However, controlling doping has been a major challenge in complex there are many possibilities charged intrinsic defects (e.g., vacancies, interstitials, antisite defects) whose energy depends on competing impurity phases. Even with no apparent deviation from stoichiometric nominal composition, commonly lead to free...
All-solid-state batteries are promising candidates for next-generation energy-storage devices. Although the list of candidate materials solid electrolytes has grown in past decade, there still many open questions concerning mechanisms behind ionic migration materials. In particular, lithium thiophosphate family shown very properties solid-state battery applications. Recently, Ge-substituted Li6PS5I argyrodite was to be a fast Li-ion conductor, despite poor conductivity unsubstituted Li6PS5I....
The recent interest in halide-based solid electrolytes Li3MX6 (M = Y, Er, and In; X Cl, Br, I) shows these materials to be promising candidates for solid-state battery application, due their high ionic conductivity large electrochemical stability window. However, almost nothing is known about the underlying lithium sub-structure within those compounds. Here, we investigate of Li3YCl6 Li3YBr6 using temperature-dependent neutron diffraction. We compare compounds prepared by classic syntheses...
Abstract Solid electrolytes (SEs) largely define the properties of all‐solid‐state batteries (ASSBs) and are expected to improve their safety, stability, performance. Their ionic conductivity has much improved in recent years, enabling higher power energy density. However, more subtle parameters, such as crystallinity, may also influence electrochemical performance cells. In this work, correlation between ASSBs thiophosphate SEs having same stoichiometry, but different crystallinity is...
Abstract All‐solid‐state batteries with conversion‐type cathodes promise to exceed the performance of lithium‐ion due their high theoretical specific energy and potential safety. However, reported solid‐state is still unsatisfactory poor electronic ionic conduction in composite cathodes. Here, situ formation active material as well highly effective ion‐ electron‐conducting paths via electrochemical decomposition Li 6 PS 5 Cl 0.5 Br (LPSCB)/multiwalled carbon nanotube mixtures during cycling...
Abstract Commercialization of solid‐state batteries requires the upscaling material syntheses as well mixing electrode composites containing solid electrolyte, cathode active materials, binders, and conductive additives. Inspired by recent literature about tremendous influence employed milling dispersing procedure on resulting ionic transport properties conductors general performance all batteries, in this review, underlying physical mechanochemical processes that processing are discussed....
Abstract A high theoretical energy density makes lithium‐sulfur (Li−S) batteries promising candidates for storage systems of the post‐lithium‐ion generation. As performance Li−S cells with liquid electrolytes is impaired by solubility reaction intermediates, solid‐state cell concepts represent an auspicious approach future electrochemical storage. However, kinetics and charge/discharge rate still remain major challenges, in‐depth knowledge charge carrier transport in composite sulfur...
ConspectusThe energy density of the ubiquitous lithium-ion batteries is rapidly approaching its theoretical limit. To go beyond, a promising strategy replacement conventional intercalation-type materials with conversion-type possessing substantially higher capacities. Among cathode materials, sulfur constitutes cost-effective and earth-abundant element high capacity that has potential to be game-changing, especially within an emerging solid-state battery configuration. Employment...
This review provides the guiding summary of various ion transport mechanisms and methods to track them in polymer-based hybrid battery electrolytes.