A5019086334- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Luminescence Properties of Advanced Materials
- Advanced Condensed Matter Physics
- Atomic and Subatomic Physics Research
- Multiferroics and related materials
- Electrocatalysts for Energy Conversion
- Rare-earth and actinide compounds
- Advanced NMR Techniques and Applications
- Advanced battery technologies research
- Quantum, superfluid, helium dynamics
- Physics of Superconductivity and Magnetism
- Graphene research and applications
- Topological Materials and Phenomena
- Perovskite Materials and Applications
- Supercapacitor Materials and Fabrication
- Ga2O3 and related materials
- Crystal Structures and Properties
- Catalytic Processes in Materials Science
- Solid-state spectroscopy and crystallography
- Nuclear materials and radiation effects
- Electrochemical Analysis and Applications
- Inorganic Chemistry and Materials
- 2D Materials and Applications
- Magnetic Properties of Alloys
National Synchrotron Radiation Research Center
2014-2024
National Cheng Kung University
2012-2024
National Synchrotron Radiation Laboratory
2023
University of Science and Technology of China
2023
Soochow University
2018-2021
Japan Atomic Energy Agency
2010-2018
Advanced Science Research Center
2018
National Tsing Hua University
2005-2014
Forschungszentrum Jülich
2003-2006
University of Warwick
1994-1997
Solid electrolyte is vital to ensure all-solid-state batteries with improved safety, long cyclability, and feasibility at different temperatures. Herein, we report a new family of amorphous solid electrolytes, xLi2O-MCly (M = Ta or Hf, 0.8 ≤ x 2, y 5 4). electrolytes can achieve desirable ionic conductivities up 6.6 × 10-3 S cm-1 25 °C, which one the highest values among all reported comparable those popular crystalline ones. The mixed-anion structural models SEs are well established...
Tuning interfacial electric fields provides a powerful means to control electrocatalyst activity. Importantly, can modify adsorbate binding energies based on their polarizability and dipole moment, hence operate independently of scaling relations that fundamentally limit performance. However, implementation such strategy remains challenging because typical methods the field non-uniformly affects only minority active sites. Here we discover uniformly tunable modulation be achieved using model...
The recently surged halide-based solid electrolytes (SEs) are great candidates for high-performance all-solid-state batteries (ASSBs), due to their decent ionic conductivity, wide electrochemical stability window, and good compatibility with high-voltage oxide cathodes. In contrast the crystalline phases in halide SEs, amorphous components rarely understood but play an important role Li-ion conduction. Here, we reveal that presence of component is common SEs prepared via mechanochemical...
Carrier-type modulation is demonstrated in 2D transition metal dichalcogenides as n-type monolayer MoSe2 converted to nondegenerate p-type Mo1−xWxSe2 through isoelectronic doping. Although the alloys are mesoscopically uniform, conduction appears originate from upshift of valenceband maximum toward Fermi level at highly localized "W-rich" regions lattice. As a service our authors and readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may...
Developing efficient Pt-based electrocatalysts for the methanol oxidation reaction (MOR) is of pivotal importance large-scale application direct fuel cells (DMFCs), but Pt suffers from severe deactivation brought by carbonaceous intermediates such as CO. Here, we demonstrate formation a bismuth oxyhydroxide (BiOx(OH)y)-Pt inverse interface via electrochemical reconstruction enhanced oxidation. By combining density functional theory calculations, X-ray absorption spectroscopy, ambient...
The revival of ternary halides Li-M-X (M = Y, In, Zr, etc.; X F, Cl, Br) as solid-state electrolytes (SSEs) shows promise in realizing practical batteries due to their direct compatibility toward high-voltage cathodes and favorable room-temperature ionic conductivities. Most the reported superionic halide SSEs have a structural pattern [MCl6]x- octahedra generate tetrahedron-assisted Li+ ion diffusion pathway. Here, we report new class zeolite-like frameworks, SmCl3, for example, which...
While tuning the electronic structure of Pt can thermodynamically alleviate CO poisoning in direct methanol fuel cells, impact interactions between intermediates on reaction pathway is seldom studied. Herein, we contrive a PtBi model catalyst and realize complete inhibition concurrent enhancement formate alkaline electrooxidation. The key role Bi enriching OH adsorbates (OHad) surface. competitive adsorption (COad) OHad at sites, complementing thermodynamic contribution from alloying with...
Luminescent materials often suffer from thermal quenching (TQ), limiting the continuation of their applications under high temperatures up to 473 K. The formation defect levels could suppress TQ, but rational synthesis and deep understanding multiple defects-regulated luminescent working in such a wide temperature range still remain challenging. Here, we prepare negative (NTQ) phosphor LiTaO3 : Tb3 + by introducing gradient defects VTa5−, TbLi2+, ( VTaTbLi)3 − as identified advanced...
Cobalt-nitrogen-carbon (Co-N-C) catalysts with a CoN
Abstract Halide solid electrolytes (SEs) have attracted significant attention due to their competitive ionic conductivity and good electrochemical stability. Among typical halide SEs (chlorides, bromides, iodides), substantial efforts been dedicated chlorides or with iodide receiving less attention. Nevertheless, compared iodides both a softer Li sublattice lower reduction limit, which enable possess potentially high intrinsic anti‐reduction stability, respectively. Herein, we report new...
Alloying metallic Ni with Fe realizes the upshift of d-band center towards Fermi level, and thus regulates polysulfide adsorbability to accelerate their catalytic conversion.
The ever-increasing demand for large-scale energy storage has driven the prosperous investigation of sodium-ion batteries (NIBs). As a promising cathode candidate NIBs, P2-type Na2/3Ni1/3Mn2/3O2 (NaNMO), prototype sodium-layered oxide, attracted extensive attention because its high operating voltage and capacity density. Although electrochemical properties have been extensively investigated, fundamental charge compensation mechanism, that is, cationic anionic redox reactions, is still...
This study is motivated by a challenge to the third law of thermodynamics: how does degenerated ground state in textbook example behave real compound? At very low temperatures, nature tries preserve basic using small perturbations and novel quantum should appear. The authors here classic frustrated magnet Ba${}_{3}$Yb${}_{2}$Zn${}_{5}$O${}_{11}$, spin tetrahedron having two-fold degeneracy realized breathing pyrochlore lattice. They measure inelastic neutron scattering low-energy excitations...
Rechargeable aqueous zinc-ion batteries (AZIBs) are close complements to lithium-ion for next-generation grid-scale applications owing their high specific capacity, low cost, and intrinsic safety. Nevertheless, the viable cathode materials (especially manganese oxides) of AZIBs suffer from poor conductivity inferior structural stability upon cycling, thereby impeding practical applications. Herein, a facile synthetic strategy bead-like oxide coated with carbon nanofibers (MnOx-CNFs) based on...
We have studied a ${\text{EuFe}}_{2}{\text{As}}_{2}$ single crystal by neutron diffraction under magnetic fields up to 3.5 T and temperatures down 2 K. A field-induced spin reorientation is observed in the presence of field along both $a$ $c$ axes, respectively. Above critical field, ground-state antiferromagnetic configuration ${\text{Eu}}^{2+}$ moments transforms into ferromagnetic structure with applied direction. The phase diagram for Eu sublattice presented. considerable strain...
Inorganic lead halide perovskite CsPbX3 (X = Cl, Br, or I) nanocrystals are promising candidate materials for light-emitting devices and optoelectronics. Mn-Doped is of particular interest, as the Mn-doping introduces an additional emission band, making this material a white-light emitter. In study, Mn-doped CsPb(Br/Cl)3 prepared at room-temperature ambient pressure. The chemical environment Mn, luminescence these analyzed in detail using X-ray diffraction (XRD), extended absorption fine...
Recent experiments indicate the universality of electron accumulation and downward surface band bending at as-grown InN surfaces with polar or nonpolar orientations. Here, we demonstrate possibility to prepare flatband (0001¯) surfaces. We have also measured stoichiometry by using core-level photoelectron spectroscopy. The is stoichiometric free In adlayer. It implies that removal adlayer leads absence bending. On other hand, (0001) still exhibits due noncentrosymmetry in wurtzite structure.
We have measured the electron affinities of clean, stoichiometric InN and GaN polar surfaces via ultraviolet photoelectron spectroscopy. The were to be 4.7 4.6 eV for In- N-polar surfaces, respectively. In contrast, vary greatly with film polarity, i.e., 3.8 3.3 Ga- propose that difference between originates from spontaneous polarization effect. Furthermore, it's closely related carrier concentration. With affinities, we are able confirm known heterojunction band alignments.
Electrocatalytic water splitting, as one of the most promising methods to store renewable energy generated by intermittent sources, such solar and wind energy, has attracted tremendous attention in recent years. Developing efficient, robust, green catalysts for hydrogen oxygen evolution reactions (HER OER) is great interest. This study concerns a facile approach producing RuNi/RuNi oxide nanoheterostructures controllable partial oxidation RuNi nanoalloy, which characterized confirmed various...
The conical spin order of multiferroic CoCr(2)O(4) has been studied by a neutron diffraction to investigate its magnetic phase transitions at temperatures below 40 K. Magnetic spiral component with an incommensurate propagation vector (0.63, 0.63, 0) was observed 26 K, while 14.5 the showed transition into fixed commensurate (2/3,2/3,0). In addition, two satellite peaks vectors (0.035, 0, and (0, 0.035, from were observed. widths these indicate long-range order. This new configuration K may...
Developing efficient electrocatalysts to accelerate the sluggish conversion of lithium polysulfides (LiPSs) is paramount importance for improving performances lithium–sulfur (Li–S) batteries. However, a consensus has not yet been reached on in situ evolution as well real catalytic active sites. Herein, defective MnV2O6 (D-MVO) designed precatalyst toward LiPSs' adsorption and conversion. We reveal that introduction surface V defects can effectively sulfurization D-MVO during electrochemical...