A5002670309- Advanced Thermoelectric Materials and Devices
- Thermal properties of materials
- Chalcogenide Semiconductor Thin Films
- Heusler alloys: electronic and magnetic properties
- Thermodynamic and Structural Properties of Metals and Alloys
- Generative Adversarial Networks and Image Synthesis
- nanoparticles nucleation surface interactions
- Thermal Radiation and Cooling Technologies
- Image Enhancement Techniques
- Catalytic Processes in Materials Science
- Intermetallics and Advanced Alloy Properties
- Machine Learning in Materials Science
- Advanced Thermodynamics and Statistical Mechanics
- Advanced Semiconductor Detectors and Materials
- Topological Materials and Phenomena
- Mesoporous Materials and Catalysis
- Catalysis and Oxidation Reactions
- Catalysts for Methane Reforming
- Advanced Image Processing Techniques
- Fluorine in Organic Chemistry
- Advancements in Materials Engineering
- Zeolite Catalysis and Synthesis
- Digital Media and Visual Art
- Perfectionism, Procrastination, Anxiety Studies
- Carbon dioxide utilization in catalysis
Zhejiang University of Science and Technology
2020-2024
Zhejiang University
2023
Shanghai University
2012-2020
Northwestern University
2019
Xihua University
2015
TU Wien
2013
University of Houston
2013
Boston College
2008-2012
Massachusetts Institute of Technology
2008
Nanjing University
2008
The dimensionless thermoelectric figure of merit (ZT) in bismuth antimony telluride (BiSbTe) bulk alloys has remained around 1 for more than 50 years. We show that a peak ZT 1.4 at 100 degrees C can be achieved p-type nanocrystalline BiSbTe alloy. These materials were made by hot pressing nanopowders ball-milled from crystalline ingots under inert conditions. Electrical transport measurements, coupled with microstructure studies and modeling, the improvement is result low thermal...
The peak dimensionless thermoelectric figure-of-merit (ZT) of Bi(2)Te(3)-based n-type single crystals is about 0.85 in the ab plane at room temperature, which has not been improved over last 50 years due to high thermal conductivity 1.65 W m(-1) K(-1) even though power factor 47 x 10(-4) K(-2). In samples with random grain orientations, we found that can be decreased by making size smaller through ball milling and hot pressing, but a similar percentage, resulting no gain ZT. Reorienting...
Abstract Combining high energy ball‐milling and hot‐pressing, significant enhancements of the thermoelectric figure‐of‐merit ( ZT ) have been reported for p‐type Bi 0.4 Sb 1.6 Te 3 nanocomposites. However, applying same technique to n‐type 2 2.7 Se 0.3 showed no improvement on values, due anisotropic nature properties . Even though texturing was effective in improving peak from 0.85 1.04, reproducibility batch remains unsatisfactory. Here, we show that good can be achieved by introducing an...
Half-Heuslers would be important thermoelectric materials due to their high temperature stability and abundance if dimensionless figure of merit (ZT) could made enough. The highest peak ZT a p-type half-Heusler has been so far reported about 0.5 the thermal conductivity. Through nanocomposite approach using ball milling hot pressing, we have achieved 0.8 at 700 °C, which is 60% higher than best might good enough for consideration waste heat recovery in car exhaust systems. improvement comes...
Abstract An enhancement in the dimensionless thermoelectric figure‐of‐merit ( ZT ) of an n‐type half‐Heusler material is reported using a nanocomposite approach. A peak value 1.0 was achieved at 600 °C–700 °C, which about 25% higher than previously highest value. The samples were made by ball‐milling ingots composition Hf 0.75 Zr 0.25 NiSn 0.99 Sb 0.01 into nanopowders and hot‐pressing powders dense bulk samples. formed arc‐melting elements. mainly comes from reduction thermal conductivity...
High lattice thermal conductivity has been the bottleneck for further improvement of thermoelectric figure-of-merit (ZT) half-Heuslers (HHs) Hf1−xZrxCoSb0.8Sn0.2. Theoretically, can be reduced by exploring larger differences in atomic mass and size crystal structure, leading to higher ZT. In this paper, we experimentally demonstrated that a lower p-type achieved when Ti is used replace Zr, i.e., Hf1−xTixCoSb0.8Sn0.2, due between Hf compared with Zr. The highest ZT peak, ∼1.0 at 800 °C,...
Abstract Based on the best peak theromoelectric figure‐of‐merit value ( ZT ) of ca. 0.8 in Hf 0.5 Zr CoSb Sn 0.2 and 1 Ti , effect thermoelectric properties is studied (Hf, Zr, Ti)CoSb with aim further improving reducing usage Hf. By either partial replacement or a ≥1 achieved at 800°C 0.44 0.12 . This composition has two advantages over previous compositions: higher than less A very much desired since more expensive other constituent elements. The improvement result thermal conductivity...
Abstract Whereas the rigid nature of standard thermoelectrics limits their use, flexible thermoelectric platforms can find much broader applications, for example, in low-power, wearable energy harvesting internet-of-things applications. Here we realize continuous, threads via a rapid extrusion 3D-printable composite inks (Bi 2 Te 3 n- or p- type micrograins within non-conducting polymer as binder) followed by compression through roller-pair, and demonstrate applications flexible, low-power...
Quaternary chalcogenide compounds Cu2+xZnSn1−xSe4 (0 ≤ x 0.15) were prepared by solid state synthesis. Rietveld powder X-ray diffraction (XRD) refinements combined with Electron Probe Micro Analyses (EPMA, WDS-Wavelength Dispersive Spectroscopy) and Raman spectra of all samples confirmed the stannite structure (Cu2FeSnS4-type) as main phase. In addition to phase, small amounts secondary phases like ZnSe, CuSe SnSe observed. Transport properties measured a function temperature in range from...
Nanostructured Ni-doped skutterudites Co(1-x)Ni(x)Sb3 (with x ranging from 0.01 to 0.09) were prepared by ball milling and direct-current induced hot press. It was found that the thermal conductivity reduced due strong electron-phonon scattering Ni-doping as well phonon increased grain boundary of nanostructures. A maximum dimensionless figure-of-merit 0.7 obtained in Co0.91Ni0.09Sb3 at 525 degrees C.
We describe a one-step, one-pot non-aqueous route for the synthesis of Sb 2 Te 3 nanocrystals with hexagonal shape and highly anisotropic nanostructures. The as-prepared nanostructures were characterized by XRD, TEM HRTEM. effect stabilizers on nanocrystal morphology has been discussed in detail. have studied thermal conductivity compacted bulk from results indicated that very low about 1 W/mK at 300 K, comparing to 4.7 polycrystalline bulk, was achieved. nanostructured is potentially good...
Synthesizing color images based on line arts while considering the styles of reference photos is a flexible form artistic creation that has recently attracted public attention. Previous approaches usually require large datasets at training, causing great inconvenience to application. Besides, sparsity art pictures often leads failure in learning valid mappings. To this end, we present SDL, self-driven dual-path framework for reference-based colorization under limited data. Given small...
Abstract Liquid Petroleum Gas has recently captured great attention worldwide due to the escalating demand for non‐oil eco‐friendly fuel resources. However, catalytic synthesis process still possesses some thermodynamic and raw material conversion flaws, in addition unfavorable occurrence of side reactions. Herein, we present an advanced core‐shell hybrid catalyst, facilely prepared by physical coating method, promoting not only high product yield, but also effectively eliminating design...
Automatic icon colorization systems show great potential value as they can serve a source of inspiration for designers. Despite yielding promising results, previous reference-guided approaches ignore how to effectively fuse structure and style, leading unpleasant color effects. Meanwhile, cannot take free-style palettes inputs, which is less user-friendly. To this end, we present FlexIcon, Flexible Icon model based on guided images palettes. promote visual quality, our first leverages Hybrid...
Thermoelectric bismuth-telluride films were successfully prepared from nitric acid aqueous solution with ethylene glycol on Ti-sputtered silicon substrates by electrochemical deposition techniques. Cyclic voltammograms (CV), X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) used to investigate nucleation process, the crystal structures, morphologies compositions of films. The results show that materials are Bi-rich, exhibiting preferred...
Different platinum catalysts patterns such as dots array and films were successfully fabricated by directly inkjet printing of catalyst precursor inks on the substrate. It offers a feasible way for deposition precise control loading, position, morphology. The effects drying behavior printed droplet catalytic performance low temperature methanol combustion investigated. results show that conversion over Platinum in is approximately 85% at 100°C.