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...

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...

Fluoride ion batteries (FIBs) are regarded as promising energy storage devices, and it is important urgent to develop cathode materials with high densities for use in FIBs.

The crack initiation and propagation under the application of opening load were analyzed in situ using nondestructive synchrotron radiation X-ray computed tomography (nanoscopic SR X-CT) with a spatial resolution ~50 nm. results show that voids cracks are not only result local stresses but also due to two competing nanoscale mechanisms, is, fiber/plastic interface debonding in-resin initiation. In "thin" epoxy region which resin thickness between adjacent carbon fibers is small, propagate...

Abstract All‐solid‐state fluoride‐ion batteries (FIBs) are regarded as promising energy storage devices; however, currently proposed cathodes fail to meet the requirements for practical applications in terms of high density and rate capability. Herein, first use stable low‐cost cuprous oxide (Cu 2 O) a cathode material all‐solid‐state FIBs with reversible fast (de)fluorination behavior is reported. A phase‐transition reaction mechanism involving Cu + /Cu 2+ redox charge compensation...

All-solid-state fluoride-ion batteries (FIBs) that use fluoride ions as carrier offer a new horizon for next-generation energy storage devices owing to their high specific capacities. Materials utilize topochemical insertion and desorption reactions of have been proposed cathodes FIBs; among them, Ruddlesden–Popper-type perovskite-related compounds are promising cathode materials reversible (de)intercalations with low volume expansion compared conversion-type materials. Although it is...

All-solid-state fluoride-ion batteries (FIBs) have been considered next-generation energy storage devices because of their high theoretical density. However, previously reported metal/metal fluoride active materials suffer from severe degradation due to large volume expansion; consequentially, fluoride-ion-intercalating fail deliver a capacity. Here, oxyfluorosulfide Sr2F2Fe2OS2 (SFFOS) with layer structure is as topotactic (de)intercalation host. This material delivers reversible capacity...

All-solid-state fluoride-ion batteries (FIBs) have attracted extensive attention as candidates for next-generation energy storage devices; however, promising cathodes with high density are still lacking. In this study, Cu3N is investigated a cathode material all-solid-state batteries, which offers enough anionic vacancies around the 2-fold coordinated Cu center F- intercalation, thereby enabling multielectron-transferred fluorination process. The contribution of both cationic and redox to...

Abstract All solid‐state batteries (ASSBs) utilizing sulfide‐based solid electrolytes hold promise for enhancing battery energy density while mitigating safety concerns, thus meeting the stringent requirements electric vehicle applications. For practical application of ASSBs, it is important to stabilize interface between electrolyte and cathode. Although cathode coated with a thin layer LiNbO 3 provide higher stability, which significantly improves charge‐discharge cycle performance,...

To detect the change of physical properties in small areas, a series high‐resolution waveform inversions is applied to time‐lapse seismic data. A procedure by use differentiation between data and normalization using reference proposed this study. The derived as straight‐forward extension inversion scatterer imaging. Through numerical tests, approach was found be more accurate than conventional obtaining velocity areas. method crosswell obtained during Mallik 2002 gas production test. area...

Abstract Voids and cracks can fatally degrade structural materials such as metals ceramics but are tolerated in carbon fibre-reinforced plastic (CFRP) composites if monitored to prevent their growth a critical size. Thus, the use of CFRPs aeronautical requires an understanding microscopic crack formation. However, this crack-formation mechanism remains unclear because experimental difficulties have hindered studies relevant phenomena that occur before Herein, we report high-resolution (~50...

The 3d transition metal oxides with a spinel structure are among the most promising cathode materials for magnesium batteries. In this study, we investigated reaction mechanism of ion insertion oxides, MgMn2O4, by electrochemical measurements, X-ray absorption spectroscopy (XAS), and synchrotron diffraction (XRD) Rietveld analysis. Open-circuit-potential XAS measurements showed that Mg2+ into MgMn2O4 does not proceed via simple two-phase coexistence between rock-salt phases. Synchrotron XRD...

All-solid-state fluoride-ion batteries (FIBs) are expected to become the next generation of battery systems owing their outstanding energy storage characteristics. However, volume expansion cathode that accompanies insertion fluoride ions remains an urgent issue be addressed. Even if intercalation-type is applied in FIBs, into interstitial sites two-dimensional materials such as LaSrMnO4 still leads non-negligible expansion. Here, we report a novel material, Sr3Fe2O5F2, possessing...

Surface carbon confinement has emerged as an efficient method in promoting the performance of Pt-based catalysts, especially design ordered intermetallic Pt alloy nanoparticles. However, to what function shell associated with phase influenced activity and particularly long-term durability both rotating disk electrode (RDE) fuel cell operating conditions not been fully understood. In this research, we designed L10 PtCo nanoparticles coated by a thin nitrogen-doped (I-PtCo@CNx) small particle...

All-solid-state Li–S batteries with sulfur-based cathodes have attracted attention, because of their high theoretical energy density. However, it is difficult to transfer electrons and ions activate redox reaction Li2S S are insulators. In this study, the Y2S3 doping active cathode materials was performed enhance properties while minimizing dopant amount. As a result, 99Li2S–1Y2S3 (mol %) material exhibited highest reversible capacities 953 mAh g–1 that exceeded those intrinsic Li2S,...

The capacity of lithium–sulfur (Li–S) batteries fades continuously with the increasing number charge–discharge cycles as a result dissolution lithium polysulfides (Li2Sx, x = 4–8) generated during charge and discharge into electrolyte. To mitigate this, fluorinated solvent-based electrolyte was applied to mesoporous carbon cathode containing confined sulfur for use in Li–S battery. During operation, solid interface (SEI) formed at surface positive electrode because decomposition, SEI...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1999Seismic traveltime tomography using Fresnel volume approachAuthors: Toshiki WatanabeToshifumi MatsuokaYuzuru AshidaToshiki WatanabeKyoto University, Japan, Toshifumi MatsuokaKyoto and Yuzuru AshidaKyoto Japanhttps://doi.org/10.1190/1.1820777 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink:...

We have developed a new deep-towed marine DC resistivity survey system. It was designed to detect the top boundary of methane hydrate zone, which is not imaged well by seismic reflection surveys. Our system, with transmitter and 160-m-long tail eight source electrodes receiver dipole, towed from research vessel near seafloor. Numerical calculations show that our system can effectively image surface layer. A carried out off Joetsu, in Japan Sea, where outcrops are observed. successfully...

The reconstruction of surface waves from the cross-correlation random wavefields has recently been extensively inspected by theoretical and experimental approaches. However, body not studied. In this study, we present a method for extracting waves, that is, direct P S reflected Philippine Sea slab. We use wavefield generated teleseismic observed Hi-net tiltmeters with passband 0.07–0.5 Hz. To enhance contribution coda, reduced source-time function deterministic phases sS, ScS SS, wave in...

Two-dimensional X-ray absorption spectroscopy was carried out to observe the reaction distribution in a LiCoO2 composite electrode from shift of peak top energy Co K-edge spectra. The influence ionic transportation inhomogeneous evaluated by using model electrode, which sandwiched between an aluminum foil and polyimide ion blocking layer. When charged with currents 6, 9, 12 mA cm–2, observed capacities were 51, 20, mAh g–1 areas visualized spectra formed within ca. 700, 500, 200 μm edge...