A5109917424- Advanced Thermoelectric Materials and Devices
- Thermal properties of materials
- Thermal Radiation and Cooling Technologies
- Chalcogenide Semiconductor Thin Films
- Heusler alloys: electronic and magnetic properties
- Perovskite Materials and Applications
- Advanced Thermodynamics and Statistical Mechanics
- Phase-change materials and chalcogenides
- Thermal Expansion and Ionic Conductivity
- Advancements in Battery Materials
- 2D Materials and Applications
- Graphene research and applications
- Structural and Chemical Analysis of Organic and Inorganic Compounds
- Advanced Battery Materials and Technologies
- Crystallography and molecular interactions
- Quantum Dots Synthesis And Properties
- Chemical Reaction Mechanisms
- Advanced Semiconductor Detectors and Materials
- Perfectionism, Procrastination, Anxiety Studies
- Nonlinear Optical Materials Research
- Carbon Nanotubes in Composites
- Physics of Superconductivity and Magnetism
- Heat Transfer and Optimization
- MXene and MAX Phase Materials
- Free Radicals and Antioxidants
Chinese Academy of Sciences
2016-2025
University of Chinese Academy of Sciences
2018-2025
Ningbo Institute of Industrial Technology
2016-2025
Beijing Technology and Business University
2022
University of Utah
2022
Academia Sinica
2014-2018
University of Nottingham Ningbo China
2014
Wuhan University
2012-2013
Shanghai Institutes for Biological Sciences
2000-2006
Shanghai Institute of Materia Medica
1998-2006
Mg(2)Si and Mg(2)Sn are indirect band gap semiconductors with two low-lying conduction bands (the lower mass higher bands) that have their respective edges reversed in the compounds. Consequently, for some composition x, Mg(2)Si(1-x)Sn(x) solid solutions must display a convergence energy of bands. Since among most prospective novel thermoelectric materials, we aim on exploring influence such (valley degeneracy) Seebeck coefficient properties series uniformly doped Sb. Transport measurements...
Rationally constructing inexpensive sulfur hosts that have high electronic conductivity, large void space for sulfur, strong chemisorption, and rapid redox kinetics to polysulfides is critically important their practical use in lithium-sulfur (Li-S) batteries. Herein, we designed a multifunctional host based on yolk-shelled Fe2N@C nanoboxes (Fe2N@C NBs) through strategy of etching combined with nitridation high-rate ultralong Li-S The highly conductive carbon shell physically confines the...
GeTe alloy is a promising medium-temperature thermoelectric material but with highly intrinsic hole carrier concentration by thermodynamics, making this system to be intrinsically off-stoichiometric Ge vacancies and precipitations. Generally, an intentional increase of formation energy vacancy element substitution will lead effective dissolution precipitates for reduction in concentration. Here, opposite direction decreasing the demonstrated substituting Cr at site. This strategy produces...
Bi2 Te3 -related alloys dominate the commercial thermoelectric market, but layered crystal structure leads to dissociation and intrinsic brittle fracture, especially for single crystals that may worsen practical efficiency. In this work, point defect configuration by S/Te/I defects engineering is engaged boost mechanical properties of n-type alloy, which, coupled with p-type BiSbTe, shows a competitive conversion efficiency fabricated module. First, as S alloying suppresses BiTe, antisite...
Abstract The emerged strategy of entropy engineering provides new ideas for realizing high‐performance thermoelectric materials, but it is still much unresolved how to achieve delicate trade‐off between the carrier mobility m H and lattice thermal conductivity κ ph in taking advantage configurational Δ S . Herein, significant advances ultralow yet decent a medium‐entropy system well‐designed (Pb, Ge, Sb, Cd) co‐alloyed SnTe reported. Moreover, co‐alloying also optimizes concentration n...
As the sole dominator of commercial thermoelectric (TE) market, Bi2 Te3 -based alloys play an irreplaceable role in Peltier cooling and low-grade waste heat recovery. Herein, to improve relative low TE efficiency determined by figure merit ZT, effective approach is reported for improving performance p-type (Bi,Sb)2 incorporating Ag8 GeTe6 Se. Specifically, diffused Ag Ge atoms into matrix conduce optimized carrier concentration enlarge density-of-states mass while Sb-rich nanoprecipitates...
Abstract Bi 2 Te 3 ‐based alloys have historically dominated the commercial realm of near room‐temperature thermoelectric (TE) materials. However, more widespread application is currently constrained by its mediocre TE performance and inferior mechanical properties resulting from intrinsic hierarchical structure. Herein, microstructure modulation carrier transport optimization strategies are employed to efficiently balance electro‐thermal performance. Specifically, weighted mobility...
Bismuth-telluride-based alloy has long been considered as the most promising candidate for low-grade waste heat power generation. However, optimizing thermoelectric performance of n-type Bi
Mn alloying in SnTe increases the band gap and decreases energy separation between light heavy hole valence bands, leading to a significant enhancement Seebeck coefficient. The maximum <italic>ZT</italic> of ~1.25 is found at 920 K for p-type SnMn<sub>0.07</sub>Te.
The structural and electronic properties of a two-dimensional monolayer bismuth are studied using density functional calculations. It is found that the forms stable low-buckled hexagonal structure, which reminiscent silicene. transport then evaluated by Boltzmann theory with relaxation time approximation. By fitting first-principles total energy calculations, modified Morse potential constructed, used to predicate lattice thermal conductivity via equilibrium molecular dynamics simulations....
The power factor was significantly enhanced benefiting from texture modulation, resulting in a<italic>ZT</italic>of ∼1.0 p-type polycrystalline SnSe.
N-type SnSe compound has been synthesized through melting with spark plasma sintering. By doping BiCl3, the carrier concentration of is significantly increased, leading to a large enhancement electrical conductivity. Meanwhile, SnSe0.95-BiCl3 samples also exhibit higher Seebeck coefficient and lower lattice thermal conductivity, compared polycrystalline SnSe. Consequently, high power factor ∼5 μW cm−1 K−2 ZT 0.7 have achieved at 793 K. The synergistic roles BiCl3 in provide many...
We report an enhanced thermoelectric performance by manipulating band engineering in Mn–In codoped SnTe. It has been revealed that SnTe is a unique example achieving the synergy of convergence and resonant state. According to theory, favors heavy doping, while state light doping. Following this idea, series samples are prepared hot pressing. A significantly Seebeck coefficient 116 μV K–1 at 300 K observed Sn0.915Mn0.11In0.005Te. By carefully tuning structure solid solution, we achieve high...
The thermoelectric properties of two-dimensional graphyne sheets are investigated by using first-principles calculations and the Boltzmann transport equation method.
Abstract An ideal thermoelectric material requires the multi‐valley and strong dispersion band structure, for relieving competition between thermopower electrical conductivity, whereas two features barely coexist in natural compounds. Here, significantly improved performance n ‐type PbSe‐ x AgSbS 2 with purposefully renormalized conduction structure is reported. It shown that spin‐orbit coupling effect splits single valley at “L” point into three individuals delicately, as Dirac shifted away...
The rock-salt type SnTe–CdTe alloys have been synthesized by the zone-melting method and show enhanced thermoelectric performance due to improved band convergence.
Optimized structure of discharging products in different metal–iodine batteries and electrochemical performance aluminum/iodine batteries.
Bi–Zn codoping promotes valence band convergence and strengthens multiple defect-phonon scattering in GeTe, leading to obviously improved thermoelectric properties.