A5042181289- Advanced Thermoelectric Materials and Devices
- Heusler alloys: electronic and magnetic properties
- Crystal Structures and Properties
- Thermal properties of materials
- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Thermal Expansion and Ionic Conductivity
- X-ray Diffraction in Crystallography
- Advanced Photocatalysis Techniques
- Thermal Radiation and Cooling Technologies
- Luminescence Properties of Advanced Materials
- Solid-state spectroscopy and crystallography
- Inorganic Fluorides and Related Compounds
- Iron-based superconductors research
- High-pressure geophysics and materials
- Electrocatalysts for Energy Conversion
- 3D Printing in Biomedical Research
- Topological Materials and Phenomena
- Advanced battery technologies research
- Nonlinear Optical Materials Research
- Face recognition and analysis
- Advanced Thermodynamics and Statistical Mechanics
- MXene and MAX Phase Materials
- Additive Manufacturing and 3D Printing Technologies
- Crystallization and Solubility Studies
Leibniz Institute for Solid State and Materials Research
2017-2025
Jiangsu Hengrui Medicine (China)
2025
Analysis and Testing Centre
2025
Qilu University of Technology
2025
Shandong Academy of Sciences
2025
Chinese Academy of Sciences
2010-2024
Institute of Automation
2024
Chongqing University
2024
Hunan University
2023
Technische Universität Dresden
2017-2021
A high thermoelectric power factor not only enables a potentially figure of merit <italic>ZT</italic> but also leads to large output density, and hence it is pivotal find an effective route improve the factor.
Structure matters: Owing to the structure and arrangement of [Be3B3O12F]10− group (see picture, left, Be blue, B olive, F green, O red), mixed-cation fluorine beryllium borate NaSr3Be3B3O9F4 (right) exhibits a large second harmonic generation effect short UV absorption edge. Its crystals show no layering tendency, making it promising for applications in deep-UV nonlinear optics. Detailed facts importance specialist readers are published as "Supporting Information". Such documents...
Abstract With the massive consumption of fossil fuels and its detrimental impact on environment, methods generating clean power are urgent. Hydrogen is an ideal carrier for renewable energy; however, hydrogen generation inefficient because lack robust catalysts that substantially cheaper than platinum. Therefore, durable earth-abundant cost-effective desirable from water splitting via evolution reaction. Here we report active transition metal dichalcogenide-based hybrid catalyst exhibits...
Significance The oxygen evolution reaction (OER) is a sluggish with poor catalytic efficiency, which one of the major bottlenecks in realizing water splitting, CO 2 reduction, and rechargeable metal–air batteries. In particular, commercial utilization electrolyzers requires an exceptional electrocatalyst that has capacity delivering ultra-high oxidative current densities above 500 mA/cm at overpotential below 300 mV long-term durability. Few catalysts can satisfy such strict criteria. Here...
Abstract Thermoelectric materials are capable of converting waste heat into electricity. The dimensionless figure-of-merit (ZT), as the critical measure for material’s thermoelectric performance, plays a decisive role in energy conversion efficiency. Half-Heusler materials, one most promising candidates power generation, have relatively low ZTs compared to other material systems. Here we report discovery p -type ZrCoBi-based half-Heuslers with record-high ZT ∼1.42 at 973 K and high...
Discovery of thermoelectric materials has long been realized by the Edisonian trial and error approach. However, recent progress in theoretical calculations, including ability to predict structures unknown phases along with their thermodynamic stability functional properties, enabled so-called inverse design Compared traditional discovery, approach potential substantially reduce experimental efforts needed identify promising compounds target functionalities. By adopting this approach, here...
Significance Thermoelectric technology can boost energy consumption efficiency by converting some of the waste heat into useful electricity. Heat-to-power conversion optimization is mainly achieved decreasing thermal conductivity in many materials. In comparison, there has been much less success increasing power factor. We report successful factor enhancement improving carrier mobility. Our approach could suggest methods to improve other Using our approach, highest reaches ∼106 μW⋅cm −1 ⋅K...
Exploring efficient and durable catalysts from earth-abundant cost-effective materials is highly desirable for the sluggish anodic oxygen evolution reaction (OER), which plays a key role in water splitting, fuel cells, rechargeable metal–air batteries. First-row transition-metal (Ni, Co, Fe)-based compounds are promising candidates as OER to substitute benchmark of noble-metal-based catalysts, such IrO2 RuO2. Although Fe cheapest one most abundant elements, there seldom papers reported on...
Exceptional bulk NiSe<sub>2</sub> electrocatalysts for hydrogen evolution are realized by the direct selenization of acetic acid-treated Ni foam <italic>via</italic> surface porosity engineering.
We report a peak dimensionless figure-of-merit (ZT) of ∼1 at 700 °C in nanostructured p-type Nb0.6Ti0.4FeSb0.95Sn0.05 composition. Even though the power factor composition is improved by 25%, comparison to previously reported Hf0.44Zr0.44Ti0.12CoSb0.8Sn0.2, ZT value not increased due higher thermal conductivity. However, led 15% increase output thermoelectric device made from previous best material Hf0.44Zr0.44Ti0.12CoSb0.8Sn0.2. The n-type used make unicouple Hf0.25Zr0.75NiSn0.99Sb0.01 with...
Abstract Thermoelectric technology converts heat into electricity directly and is a promising source of clean electricity. Commercial thermoelectric modules have relied on Bi 2 Te 3 -based compounds because their unparalleled properties at temperatures associated with low-grade (<550 K). However, the scarcity elemental greatly limits applicability such modules. Here we report performance assembled from -substitute compounds, including p-type MgAgSb n-type Mg (Sb,Bi) , by using simple,...
Demonstration of a robust, tellurium-free thermoelectric module for near-room-temperature applications with high conversion efficiency 8.5% and maximum cooling 72 K.
Spin-momentum coupling, which depends strongly on the relativistic effect of heavy elements in solids, is basis many phenomena spintronics. In this Letter, we theoretically predict nonrelativistic spin-momentum coupling two-dimensional materials. By proposing magnetic symmetry requirements for spin splitting systems, find that a simple twisting operation can realize antiferromagnetic bilayers. Through first-principles calculations, demonstrate momentum-dependent exists extensively twisted...
Abstract Many thermoelectric materials benefit from complex microstructures. Grain boundaries (GBs) in nanocrystalline thermoelectrics cause desirable reduction the thermal conductivity by scattering phonons, but often lead to unwanted loss electrical charge carriers. Therefore, modifying GBs suppress their resistivity plays a pivotal role enhancement of performance, zT . In this work, different characteristics GB phases Ti‐doped NbFeSb half‐Heusler compounds are revealed using combination...
Abstract Monocrystalline SnSe is one of the most promising thermoelectric materials with outstanding performance and a high abundance constituting elements. However, polycrystalline SnSe, which more robust for applications, only shows large figure‐of‐merit ( zT ) values in its high‐symmetry phase. Stabilizing phase at low temperatures can thus enhance average value over broad temperature range. In this work, rock‐salt successfully obtained by alloying AgVVI 2 compounds (V = Sb, Bi; VI Se,...
A novel series of alkali and alkaline earth metal combined fluorine beryllium borates NaCaBe2B2O6F, KCaBe2B2O6F, KSrBe2B2O6F were successfully synthesized through molecular engineering design grown in crystals by spontaneous nucleation technique from self-flux systems. The idea, introduction relatively small cations the anion, resulted UV NLO crystal following substitution directed to two centrosymmetric compounds KCaBe2B2O6F KSrBe2B2O6F. In all their structures, a–b plane is infinite...
The rapid development of deep‐UV (DUV) all‐solid‐state laser sources greatly depends on the good performance nonlinear optical (NLO) crystals used for harmonic generation. In this work, potential prospects NLO borate are investigated from point view their structure–property relationships. microscopic structural units, energy bandgaps, linear and properties numerous compounds with diverse features compared summarized. results reveal that KBe 2 BO 3 F almost achieves theoretical limits DUV...
The four compounds BaGa(2)MQ(6) (M = Si, Ge; Q S, Se) have been identified as a new series of IR nonlinear optical (NLO) materials and are promising for practical applications. They isostructural crystallize in the noncentrosymmetric polar space group R3 trigonal system. Their three-dimensional framework is composed corner-sharing (Ga/M)Q(4) tetrahedra with Ba(2+) cations cavities. alignment one (Ga/M)-Q2 bond each along c direction conducive to generating large NLO response, which was...
Despite the unfavorable band structure with twofold degeneracy at valence maximum, MgAgSb is still an excellent p‐type thermoelectric material for applications near room temperature. The intrinsically weak electron–phonon coupling, reflected by low deformation potential E def ≈ 6.3 eV, plays a crucial role in relatively high power factor of MgAgSb. More importantly, Li successfully doped into Mg site to tune carrier concentration, leading resistivity reduction 3 and consequent increase ≈30%...
SnTe is known as an eco-friendly analogue of PbTe without toxic elements. However, the application potentials pure are limited because its high hole carrier concentration derived from intrinsic Sn vacancies, which lead to a electrical thermal conductivity and low Seebeck coefficient. In this study, self-compensation Mn alloying could significantly improve coefficients in whole temperature range through simultaneous optimization band engineering, thereby leading large improvement power...
Modern society relies on high charge mobility for efficient energy production and fast information technologies. The power factor of a material-the combination electrical conductivity Seebeck coefficient-measures its ability to extract from temperature differences. Recent advancements in thermoelectric materials have achieved enhanced coefficient by manipulating the electronic band structure. However, this approach generally applies at relatively low conductivities, preventing realization...