A5100382011- Advanced Thermoelectric Materials and Devices
- Thermal properties of materials
- Thermal Radiation and Cooling Technologies
- Chalcogenide Semiconductor Thin Films
- Advanced Thermodynamics and Statistical Mechanics
- Heusler alloys: electronic and magnetic properties
- Thermal Expansion and Ionic Conductivity
- Phase-change materials and chalcogenides
- Innovative concrete reinforcement materials
- Optical properties and cooling technologies in crystalline materials
- Perovskite Materials and Applications
- Thermodynamic and Structural Properties of Metals and Alloys
- Building Energy and Comfort Optimization
- 2D Materials and Applications
- Gas Sensing Nanomaterials and Sensors
- Concrete and Cement Materials Research
- Structural Behavior of Reinforced Concrete
- Dielectric materials and actuators
- Quantum Dots Synthesis And Properties
- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
China State Construction Engineering (China)
2025
Ningbo Institute of Industrial Technology
2020-2024
Chinese Academy of Sciences
2020-2024
University of Chinese Academy of Sciences
2020-2024
Taiyuan University of Technology
2020
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
Bi–Zn codoping promotes valence band convergence and strengthens multiple defect-phonon scattering in GeTe, leading to obviously improved thermoelectric properties.
Abstract The good co‐existence of midgap state and valence band degeneracy is realized in Bi‐alloyed GeTe through the In‐Cd codoping to play different but complementary roles structure modification. In doping induces results a considerably improved Seebeck coefficient near room temperature, while Cd significantly increases mid‐high temperature region by promoting convergence. synergistic effects obviously increase density effective mass from 1.39 2.65 m 0 , corresponding carrier mobility...
Abstract Bismuth‐telluride‐based alloy is the sole thermoelectric candidate for commercial application in low‐grade waste heat harvest near room temperature, but sharp drop of properties at higher temperature and weak mechanical strength zone‐melted material are main obstacles to its wide development power generation. Herein, an effective approach reported improve performance p ‐type Bi 0.42 Sb 1.58 Te 3 hot‐pressed sample by incorporating Ag 5 SbSe 4 . A peak ZT 1.40 375 K a high average...
The highly active additive Cu 2 SnTe 3 generates multi-scale defects, effectively reducing lattice thermal conductivity. Along with optimized weighted mobility, the higher quality factor yields a competitive ZT value in (Bi,Sb) Te -based composite.
Fermi-surface dynamics drives the thermoelectric performance of n-type SnSe along out-of-plane direction.
CuI–Mn codoping promotes valence band convergence and enhances multiple defect-phonon scattering in SnTe, giving rise to significantly improved thermoelectric performance.
Bismuth telluride alloys have dominated the industrial application of thermoelectric cooling, but relatively poor mechanical performance commercial zone-melting material seriously limits device integration and stability. Here, we exhibit synergistically enhanced performances sintered Bi0.48Sb1.52Te3–AgSbSe2 composites. It is found that increased hole concentration improves S2σ to 40 μW cm–1 K–2 at room temperature, emerged various defects effectively suppress κl 0.57 W m–1 K–1 350 K. All...
By adding “weakly-active” SGPT and Cu, differentiated electro-phonon scattering centers are induced to significantly suppress κ ph with μ less affected, leading a ZT ave of 1.32 η 6.8%.
In 19-e half-Heusler compounds, the strong d–d bonding is weakened by extra valence electron occupying antibonding states. Thus, high lattice thermal conductivity of 18-e compounds significantly reduced.
Engineered cementitious composites (ECCs) are a type of high-performance composite material, but in practical applications, ECCs that combine high strength with toughness have greater development potential. Moreover, there is currently no unified standard or method for assessing the bending ECCs. This study based on Modified Andreasen and Andersen model (MAA) design ratio closest packing theory to investigate effect changes water–binder fiber content, where taken as 0.19, 0.22, 0.25, content...
Abstract Bi 2 Te 3 ‐based alloys remain the only commercially available thermoelectrics to date. However, extensive intrinsic defects and “donor‐like” effect intensified by powder metallurgy significantly deteriorate transport properties of (Bi,Sb) . Here, Cu is consistently used as most effective dopant for performance enhancement, while substituting with more electronegative S strengthens electrostatic attraction, thereby markedly increasing energy barrier ion migration. The optimized...
In this study, we have designed and developed an implantable thermoelectric generator (TEG) module tailored for large-scale flue gas waste heat recovery. We also established a test stand to simulate diverse operational conditions, systematically examined the influence of different operating including temperature, velocity, cooling water on electrical performance TEG module. When temperature is 139 °C, flow rate 3.4 m/s, 20 operates at its peak performance. It achieves open-circuit voltage...
Zone-melted Bi2Te3-based alloys are the only commercially available thermoelectric (TE) materials, but they suffer from mediocre figure of merit (ZT) values and brittleness. In this work, we prepared Bi0.48Sb1.52Te3 sintered samples using a hot-pressing method added tiny AgCuTe to improve comprehensive properties. Because carrier concentration is boosted by addition, bipolar effect at higher temperature explicitly suppressed power factor also improved in broad scope. Simultaneously, κlat...
Bismuth telluride alloys are the only commercialized thermoelectric materials, which have successfully realized practical applications of active cooling and waste heat harvesting near room temperature. However, drawbacks intermediate ZT values brittle nature zone-melted materials limited their future development. Herein, we show that AgBiSe2 alloying is an effective approach to improve both mechanical performance sintered Bi0.48Sb1.52Te3 materials. The addition can not suppress bipolar...
The thermoelectric properties of GeTe (300 ∼ 700 K) are significantly improved, leading to a conversion efficiency 8.6% with T c = 300 K and h K.
Abstract Bi 2 Te 3 ‐based alloys are the benchmark for commercial thermoelectric (TE) materials, widespread demand low‐grade waste heat recovery and solid‐state refrigeration makes it imperative to enhance figure‐of‐merits. In this study, high‐performance 0.5 Sb 1.5 (BST) is realized by incorporating Cu GeSe Se. Concretely, diffusion of Ge atoms optimizes hole concentration raises density‐of‐states effective mass ( m d * ), compensating loss “donor‐like effect” exacerbated ball milling. The...