A5060584871- Advanced Thermoelectric Materials and Devices
- Chalcogenide Semiconductor Thin Films
- Thermal properties of materials
- Ferroelectric and Piezoelectric Materials
- 2D Materials and Applications
- Electronic and Structural Properties of Oxides
- Multiferroics and related materials
- Thermal Radiation and Cooling Technologies
- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Advanced Thermodynamics and Statistical Mechanics
- Quantum Dots Synthesis And Properties
- Heavy metals in environment
- Phase-change materials and chalcogenides
- Magnetic and transport properties of perovskites and related materials
- MXene and MAX Phase Materials
- Catalytic Processes in Materials Science
- Topological Materials and Phenomena
- Advanced Battery Technologies Research
- Graphene research and applications
- Microwave Dielectric Ceramics Synthesis
- Nanowire Synthesis and Applications
Southern University of Science and Technology
2018-2025
Great Bay University
2024-2025
King University
2025
Peking University
2025
Harbin Institute of Technology
2022-2024
Zhejiang University of Technology
2022
Lanzhou Petrochemical Polytechnic
2022
Hengyang Normal University
2022
South China Normal University
2020
Qiqihar University
2020
Thermoelectric technology generates electricity from waste heat, but one bottleneck for wider use is the performance of thermoelectric materials. Manipulating configurational entropy a material by introducing different atomic species can tune phase composition and extend optimization space. We enhanced figure merit (zT) value to 1.8 at 900 kelvin in an n-type PbSe-based high-entropy formed entropy-driven structural stabilization. The largely distorted lattices this system caused unusual...
The high-entropy concept provides extended, optimized space of a composition, resulting in unusual transport phenomena and excellent thermoelectric performance. By tuning electron phonon localization, we enhanced the figure-of-merit value to 2.7 at 750 kelvin germanium telluride-based materials realized high experimental conversion efficiency 13.3% temperature difference 506 with fabricated segmented module. increasing entropy, increased crystal symmetry delocalized distribution electrons...
Ordering up better conductivity Improving a thermoelectric material's ability to convert heat electricity involves optimizing one property without changing another in detrimental way. Roychowdhury et al. found that cadmium doping of silver antimony telluride enhances cationic ordering, which simultaneously improves electric properties and helpfully decreases thermal (see the Perspective by Liu Ibáñez). This strategy markedly could be used for other materials. Science , this issue p. 722 ;...
Abstract We demonstrate that the thermoelectric properties of p-type chalcogenides can be effectively improved by band convergence and hierarchical structure based on a high-entropy-stabilized matrix. The is due to decreased light heavy energy offsets alloying Cd for an enhanced Seebeck coefficient electric transport property. Moreover, manipulated entropy engineering introduces all-scale scattering sources heat-carrying phonons resulting in very low lattice thermal conductivity....
Thermoelectric materials can realize direct and mutual conversion between electricity heat. However, developing a strategy to improve high thermoelectric performance is challenging because of strongly entangled electrical thermal transport properties. We demonstrate case in which both pseudo-nanostructures vacancy clusters dynamic charge-carrier regulation trapped-hole release have been achieved p-type lead telluride-based materials, enabling the simultaneous regulations phonon charge...
As one of the most promising alternatives to graphite negative electrodes, silicon oxide (SiOx) has been hindered by its fast capacity fading. Solid electrolyte interphase (SEI) aging on SiOx recognized as critical yet least understood facet. Herein, leveraging 3D focused ion beam-scanning electron microscopy (FIB-SEM) tomographic imaging, we reveal an exceptionally characteristic SEI microstructure with incompact inner region and a dense outer region, which overturns prevailing belief that...
Abstract The rational design of catalysts’ spatial structure is vitally important to boost catalytic performance by exposing the active sites and increasing specific surface area. Herein, heteroatom doping morphology CoNi metal‐organic frameworks(MOF) are modulated controlling volume ionic liquid used in synthesis generating CoSe 2 ‐NiSe heterojunction structures wrapped N, P, F tri‐doped carbon(NPFC) after a selenisation process. Notably, unique cubic porous /NPFC results five times that...
Abstract GeTe is an interesting material presenting both spontaneous polarization (ferroelectrics) and outstanding electrical conductivity (ideal for thermoelectrics). Pristine exhibits classic 71° 109° submicron ferroelectric domains, near unity thermoelectric figure of merit ZT at 773 K. In this work, it demonstrated that Bi 2 Te 3 alloying in lattice can introduce vast Ge vacancies which further evolve into nanoscale van der Waals gaps upon proper heat treatment, these vacancy induce 180°...
Through appropriate doping, the properties of BaTiO3-based ferroelectrics can be significantly enhanced. To determine physical process induced by doping Sn atoms in Ba(Ti0.8Sn0.2)O3, we performed high-resolution scanning transmission electron microscopy experiments and observed that regions with low content formed polar nano (PNRs) embedded matrix Ba(Ti0.8Sn0.2)O3. The interactions among Sn, Ti, Ba O were determined using first principles calculations. Based on characteristics electronic...
An ultrahigh figure of merit ZT value ≈2.4 at 773 K for p-type pseudo-layered Sb
We report a study of the anharmonic lattice dynamics in low thermal conductivity (${\mathbit{\ensuremath{\kappa}}}_{\mathbit{l}}$) material ${\mathrm{AgCrSe}}_{2}$ by many-body perturbation theory. demonstrate surprisingly giant four-phonon scattering exclusive for heat-carrying transverse acoustic phonons due to large quartic anharmonicity and nondispersive phonon band structure, which lead Fermi resonance breaks classical...
Abstract As one of the most promising cathodes for Li‐ion batteries, Li‐rich layered oxides suffer from low Coulombic efficiency, severe capacity fading, and voltage decay, which are related to aggregated Li@Mn 6 superstructure units. Herein, a Co‐free oxide Li[Li 1/4 Mn 1/2 Ni 1/6 Al 1/12 ]O 2 through substitution Co in , is designed. Combining average structural refinement with detailed local structural/chemical analysis, it found that introduced ions occupy sites units, further induces...
Thermoelectrics enable direct heat-to-electricity transformation, but their performance has so far been restricted by the closely coupled carrier and phonon transport. Here, we demonstrate that quantum gaps, a class of planar defects characterized nano-sized potential wells, can decouple transport selectively scattering phonons while allowing carriers to pass effectively. We choose van der Waals gap in GeTe-based materials as representative example illustrate decoupling mechanism. The well...
Silver vacancy-induced nanoscale cation ordering in AgSbTe 2 elevates its thermoelectric performance.
Tuning the active site structure of metal-nitrogen-carbon electrocatalysts has recently attracted increasing interest. Herein, we report a bottom-up synthesis strategy in which atomically regulated N-doped polycyclic aromatic hydrocarbons (N-PAHs) N
Inorganic plastic semiconductors play a crucial role in the realm of flexible electronics. In this study, we present cost-effective thermoelectric semimetal magnesium bismuthide (α-Mg3Bi2), exhibiting remarkable performance. Bulk single-crystalline α-Mg3Bi2 exhibits considerable deformation at room temperature, allowing for fabrication intricate shapes such as letters "SUSTECH" and chain. Transmission electron microscopy, time-of-flight neutron diffraction, chemical bonding theoretic...
Undoped and In-doped ZnO nanowires (NWs) have been synthesized by thermal evaporation. The effect of indium doping on the structure, morphology electrical/optical properties as-grown NWs has investigated. It found that doped are single crystalline along different orientations, preferably in [0 0 1] growth direction. peak shifts broadening x-ray diffraction pattern confirm incorporation into lattice. amount contents valence state In ions investigated through energy dispersive spectroscopy...
Relaxor ferroelectrics are materials exhibiting dielectric dispersions in their maximum permittivity temperature without macroscopic phase transition into a ferroelectric state. Their exceptional properties exploited variety of and piezoelectric applications. As it is generally believed that polar nanoregions play crucial role relaxor behavior, there great interests exploring how the atomic structures affect properties. Here, using dark field imaging atomic-resolution electron microscopy, we...
The presence of active metal nanoparticles on the surface significantly increases electrochemical performance ABO3 perovskite oxide materials. While conventional deposition methods can improve activity, in situ exsolution produces with far greater stability. migration transition atoms toward is expected to affect process. To study energetics, we use ab initio computations combined experiments a SrTiO3-based model system. Our calculations show that Ni preferentially segregates (100)-oriented...