Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Zixuan Tian,Jialing Jiang,Lei Wang,Songtao Dong,Jing Luan,Hongbo Ju
BiCuSeO has attracted significant interest in the field of thermoelectric materials due to its layered crystalline structure, along with advantages such as abundant elemental availability, low thermal conductivity, and outstanding thermal stability. However, the inherently low electrical conductivity of BiCuSeOlimiting overall thermoelectricperformance. To address this, as an effective strategy to enhance thermoelectric performance, BiCuSeO was subjected to tri-element co-doping. Bi 1−3x (CaSrBa) x CuSeO (x = 0.0, 0.02, 0.03, 0.04, and 0.05) ceramics were synthesized using an advanced fabrication process that combined high-energy ball milling with hot-press sintering techniques. Substituting Ca 2+ , Sr 2+ , and Ba 2+ at the Bi 3+ sites effectively optimized the carrier concentration, increased the effective mass, and significantly enhanced the electrical conductivity from 9.67 to 91.55 S cm −1 . Notably, the power factor of the Bi 0.88 (CaSrBa) 0.04 CuSeO sample reached 476.54 μW m −1 K −2 at 323 K. and electrical conductivity. Simultaneously, the introduction of lattice defects through co-doping considerably enhanced phonon scattering, reducing the lattice thermal conductivity to 0.342 W m −1 K −1 for Bi 0.85 (CaSrBa) 0.05 CuSeO, compared with 0.447 W m −1 K −1 for the pristine sample. Consequently, a maximum dimensionless figure of merit ( ZT ) of 0.65 was achieved at 773 K for Bi 0.88 (CaSrBa) 0.04 CuSeO. These findings provide valuable insights into improving the thermoelectric performance of BiCuSeO-based materials through multi-element co-doping.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·Vol. 45
·期 15
·117636
·
IF 6.2
Shaoqing Lu,Shengmao Sha,Jian Wang,Lulu Huang,Yu Liu,Jian Yan,Yucheng Wu
PbSe is a promising thermoelectric (TE) material with excellent carrier transport properties and an economic advantage due to the lower cost of selenium compared to tellurium, making it a potential alternative to PbTe. Improving its TE performance through dual-element doping represents a widely employed approach. In this study, the TE properties of n-type PbSe are improved through the simultaneous incorporation of Sn and Cu into the PbSe matrix. By precisely controlling the Pb content, we enable Sn dopants to occupy both interstitial sites and substitutional Pb positions, thereby significantly enhancing electrical conductivity . Meanwhile, interstitial Cu exhibits a temperature-dependent dissolution-precipitation behavior, dynamically turning the carrier concentration and improving electrical transport properties. The dual-doping strategy also introduces abundant point defects , effectively scattering phonons and reducing the lattice thermal conductivity . As a result, the electrical transport properties of the co-doped Pb 0.99 Sn 0.01 Se-0.7 %Cu sample are further improved by Pb regulation, achieving a power factor of 24.2 mW cm⁻¹K⁻² and a peak zT value of 1.80 at 728 K. These results demonstrate the effectiveness of the Sn and Cu co-doping approach in enhancing the TE performance of PbSe, offering promise for the development of cost-effective and high-performance TE materials.
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Energy & Environmental Materials
·
2025
·
IF 14.1
Wenying Wang,Xinglong Wang,Lin Bo,Wenying Zhou,Changcun Li,Zheng Zhang,Futian Liu,Degang Zhao
Cu 3 SbSe 4 -based compounds have attracted considerable potential in the realm of thermoelectric research owing to their distinctive physical properties and environmental compatibility. The material was efficiently synthesized via rapid microwave melting processing, aiming to improve its viability as a cost-effective thermoelectric option for practical applications. This study emphasizes the stepwise optimization of thermoelectric transport properties. The foremost effort involved improving transport electrical transport properties through the co-alloying of Sn and Te to determine optimal compositional configurations for superior thermoelectric performance. Iterative refinement enabled increased hole carrier concentration, which effectively addressed the intrinsic limitation of low electrical conductivity, thereby increasing the power factor by three times. Based on this foundation, a hierarchical multiscale structure was developed through the incorporation of AgCuTe as a secondary phase, which enhanced phonon scattering across multiple scales and consequently reduced thermal conductivity by 65% relative to pristine samples. The synergistic optimization of electronic and thermal transport properties culminated in a significant improvement in zT . The optimized Cu 3 SbSe 4 –1.0 wt% (Sn, Te)-2.5 wt% AgCuTe composite demonstrated a peak zT of 1.21 at 650 K and an average zT avg of 0.52 across the range of 300–650 K, contributing to a deeper understanding of the transport properties for chalcogenide-based thermoelectric compounds.
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Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 44
·37953-37961
·
IF 9.5
Yao Dai,Yubo Luo,Yingchao Wei,Tianshun Xiong,Chengwei Sun,Wenjie Shu,Guanzheng Luo,Linyao Wu,Shuhui Zhang,Qinghui Jiang,Xin Li,Zheng Ma,Yao Luo,Yan Liu,Dan Zhang,Junyou Yang
Inorganic plastic thermoelectric materials have attracted much attention for breaking the brittle bottleneck of traditional inorganic thermoelectric materials. The Ag2(S, Se, Te) system is one of the most novel and promising thermoelectric semiconductors. To enhance its thermoelectric performance, substitution of Na for Ag is adopted to modulate the electrical and thermal transport properties of Ag2S1/3Se1/3Te1/3, through enhancing phonon scattering and effective mass. It enables us to achieve a record high average power factor (PF) of 7.4 μW cm−1 K−2 in the temperature interval of 300–500 K and a room-temperature thermoelectric figure of merit (ZT) of 0.50 and a peak ZT of 0.84 at 500 K in Ag2(S, Se, Te), respectively. In addition, the slip mode of Ag2S1/3Se1/3Te1/3 plastic deformation is also revealed for the first time, in which the crystal slip behavior is dominated by the {112}〈111〉 slip regime, instead of the conventional {110}〈111〉 view. The obtained high thermoelectric performance, as well as the maintained plastic performance, shows broad application prospects in waste heat recovery and wearable devices.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2026
·
IF 5.2
Xueli Zuo,Feida Chen,Shujie Wu,Wei Zheng,Yuan Liu,Jun Li,Jifeng Zhang,Xiaobin Tang
Simultaneously optimizing electrical and thermal transport properties remains a major challenge for thermoelectric materials. In this work, high-entropy secondary phases (HE2P) were introduced into a Cu-doped PbTe matrix to improve the thermoelectric performance of n-type PbTe. Carbon-coated HE2P particles were incorporated into the PbTe matrix through vacuum melting and fast hot-pressing, resulting in a hierarchical microstructure with refined grains, heterointerfaces, and defect structures. The introduced HE2P effectively suppresses lattice thermal conductivity through enhanced phonon scattering induced by interfaces, lattice distortion, and mass fluctuation. Meanwhile, the heterogeneous interfaces introduced by the carbon-coated HE2P particles may also influence carrier transport behavior. As a result, the composite with 7% HE2P achieves a low lattice thermal conductivity of 0.39 W m −1 K −1 at 838 K and a peak ZT value of 1.38, together with an average ZT of 1.01 over 300–850 K. These results suggest that incorporating high-entropy secondary phases provides a feasible approach for improving the thermoelectric performance of PbTe-based materials.
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ACS Applied Electronic Materials
·
2026
·Vol. 8
·期 14
·5979-5990
·
IF 4.7
Zhang Wenhao,Chen Sicheng,Xu Ting,Song Chunjun,Zhang Jian,Li Di,Xin Hongxing
PbBi 2 Te 4 is regarded as a promising thermoelectric material due to its complex ternary layered structure. However, its intrinsically high carrier concentration limits its thermoelectric performance. To address this issue, Ni and Se doping was initially employed to modulate the carrier concentration. Nonetheless, the modest enhancement achieved through doping alone suggests that this strategy is insufficient to substantially improve the thermoelectric properties of PbBi 2 Te 4 . Subsequently, solid-state lithiation was systematically investigated as an alternative approach. The incorporation of Li ions into the PbBi 2 Te 4 matrix effectively reduced the thermal conductivity, leading to a significant enhancement in thermoelectric performance. Specifically, after solid-state lithiation of the Ni- and Se-co-doped sample (PbNi 0.04 Bi 1.96 Te 3.6 Se 0.4 ), a maximum figure of merit (ZT) of 0.54 was achieved at 590 K, corresponding to a 68% improvement over the ZT max of pristine PbBi 2 Te 4 . Furthermore, an average ZT of 0.41 was obtained in the temperature range of 300–650 K, representing a 140% increase compared to that of the pristine sample over the same temperature range. These findings offer valuable insights for the further development of PbBi 2 Te 4 -based thermoelectric materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Songtao Dong,Tian-yu Zhang,Jing Luan,Honglei Wang,Lei Wang,Hongbo Ju
As a viable p-type thermoelectric (TE) material, Cu 2 SnSe 3 has attracted increasing attention, primarily due to its moderate band gap and tunable electronic structure. Nevertheless, its practical TE utilization is significantly limited by its inherently high lattice thermal conductivity ( κ l ) and suboptimal power factor. Herein, a Fe/Mn co-doping strategy is proposed to concomitantly regulate electrical and thermal transport properties, thereby achieving a remarkable improvement in the overall TE performance. A series of Cu 2 Sn 1–2x Fe x Mn x Se 3 (x = 0, 0.02, 0.04, 0.06) ceramic samples were fabricated via vacuum-based melting followed by hot-press sintering, which concurrently introduced abundant lattice defects and a CuSe secondary phase. These multi-scale structural features significantly enhance phonon scattering, causing a substantial reduction in thermal conductivity. Consequently, the total thermal conductivity of Cu 2 Sn 0.92 Fe 0.04 Mn 0.04 Se 3 is reduced to a minimum value of 0.432 W m −1 K −1 at 773 K. Meanwhile, Fe/Mn co-doping notably increases the charge carrier concentration ( n ), resulting in a dramatic enhancement in electrical conductivity—from 189.8 S cm −1 for Cu 2 SnSe 3 to 1381 S cm −1 for Cu 2 Sn 0.92 Fe 0.04 Mn 0.04 Se 3. Although the Seebeck coefficient exhibites a slight to moderate reduction, the significant increase in electrical conductivity prevails, yielding a substantially optimized power factor ( PF ). A maximum PF of 500.1 μW m −1 K −2 was achieved, together with a peak ZT value of 0.89 at 773 K, representing a 5.23-fold enhancement compared to the undoped Cu 2 SnSe 3 sample ( ZT = 0.17). In addition to enhancing thermoelectric performance, Fe/Mn co-doping significantly improves the mechanical of Cu 2 SnSe 3 . Specifically, the Young’s modulus ( E ) and hardness ( H ) of Cu 2 Sn 0.92 Fe 0.04 Mn 0.04 Se 3 increased by 18.2% and 25.2%, respectively, relative to the undoped sample—demonstrating markedly enhanced mechanical robustness. These results establish Fe/Mn co-doping as an effective and versatile strategy for decoupling electrical and thermal transport in Cu 2 SnSe 3 -based materials, thereby providing a promising pathway toward high-performance thermoelectric materials with superior structural integrity.
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CARBON
·
2026
·
IF 12.7
Lingxin Kong,Hui Luo,Sihai Lv,Yongzhi Cheng,Fu Chen,Xiangcheng Li
The proliferation of wireless technologies has rendered electromagnetic wave pollution a critical concern, driving the demand for lightweight absorbers with broad bandwidth and strong attenuation. However, achieving a balance between impedance matching and loss capacity remains challenging, especially at low filler loadings. Herein, a multi-interface engineering strategy is reported to construct an ultralight hierarchical carbon foam decorated with bimetallic selenides (CoSe 2 /MnSe/C@MC, denoted CMCM). This architecture is fabricated via in-situ growth of bimetallic CoMn-ZIFs on carboxymethyl cellulose-modified melamine foam, followed by carbonization and selenization. The three-dimensional porous framework provides excellent impedance matching and multiple scattering, while the synergistic effects of interfacial polarization, dipolar polarization, and conductive loss enhance microwave attenuation. The optimized foam achieves a minimum reflection loss of −63.91 dB at a thickness of 1.43 mm and an effective absorption bandwidth of 4.72 GHz at 1.41 mm. Additionally, the lightweight foam exhibits favorable thermal insulation capability. This work establishes a versatile multi-interface engineering paradigm for designing lightweight, broadband, and multifunctional electromagnetic wave absorbers. Download: Download high-res image (349KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Haizhou Zhao,Ji Xue,Chenqing Ye,Fangmin Wang,Hao Ma,Yanjie Wang,Fei Liang,Du Lv,Yancheng Yang,Yao Yao,Yi Gu,Yiyong Zhang,Zemin He,Rui Tian,Sizhe Wang
Lithium-free anodes can significantly enhance the energy density and simplify the structure of batteries by eliminating conventional anode materials. However, uneven lithium deposition often leads to dendrite growth and interfacial instability, severely compromising their cycling performance. Here, we construct a high-entropy selenide nanocomposite ((VZrNbMoW)Se 2 , HESe) on a three-dimensional carbon fiber scaffold through a localized high-concentration vapor-phase selenization strategy. This architecture preserves the conductive scaffold while establishing a compositionally graded surface that reduces Li + diffusion barriers, eliminates local tip effects, and promotes lateral planar epitaxial growth of lithium. Such a gradient interfacial design further directs the formation of a stable, multilayered solid-electrolyte interphase featuring a LiF/Li 2 O-rich inorganic inner layer and an organic-rich outer layer, enabling synergistic regulation of deposition morphology and interfacial chemistry. As a result, the Li|HESe/CF half-cell delivers stable cycling for 1000 cycles with an average Coulombic efficiency of 99.5% under 20 mA cm −2 /1 mAh cm −2 . The LFP||HESe/CF full cell achieves 89.82% capacity retention after 200 cycles at 1.5C, corresponding to a low decay rate of only 0.0509% per cycle. This study provides an effective Li deposition regulation strategy via high-entropy selenide in anode-free lithium metal batteries. This work proposes constructing a gradient chemical potential field via high-entropy selenides design. This field, composed of a continuous ionic potential gradient from diverse metal ions, guides lithium-ion migration orderly, promotes uniform lithium deposition, and significantly reduces the lithium diffusion barrier. Download: Download high-res image (159KB) Download: Download full-size image
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·Vol. 36
·期 63
·e77025
·
IF 19.9
Xuan Weng,Peilin Li,Chenyang Jia,Xinkai Guo,Wen Sun,Hai Jiang
Flexible sensors are evolving from single-parameter to multi-modal measurement. Dual-modal flexible tactile sensors capable of detecting both temperature and pressure are essential for human–machine interaction and wearable health monitoring. Here, we present a flexible dual-modal sensor constructed from a sponge framework decorated with MXene–Ag 2 Se nanocomposite. The heterogeneous MXene–Ag 2 Se interfaces enhance carrier transport and conductivity. A three-electrode configuration with spatially separated in-plane thermoelectricity and out-of-plane piezoresistivity enables effective decoupling of temperature and pressure sensing. The MXene–Ag 2 Se@sponge sensor demonstrates high pressure sensitivity (2.202 kPa − 1 in 0–25 kPa, 0.466 kPa − 1 in 25–60 kPa, and 0.076 kPa − 1 in 60–300 kPa), a fast response time (37 ms) for pressure sensing, and excellent durability. For temperature sensing, it achieves an ultralow detection limit of 0.2 K, a high Seebeck coefficient of 175.47 µV/K, and stable cycling performance. In addition, the MXene–Ag 2 Se@sponge dual-modal sensor is applied to human pulse monitoring, joint motion detection, and finger temperature measurement, highlighting its potential for wearable biomedical sensing. Furthermore, a sensor array was also implemented as electronic skin, enabling simultaneous temperature-pressure mapping with high spatial resolution. This work provides a promising strategy for intelligent robotics and flexible electronics.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Guoxu Ni,Runye Hu,Qikai Wang,Wenwen Shi,Qiuhong Cui,Jun Yan
HF-free synthesis of FeSe₂@S-Ti₂C via Lewis acidic molten-salt etching. • Simultaneous Ti₂C termination, etching, and FeSe₂ anchoring in one step. • Strong interfacial coupling endows Ti₂C/FeSe₂ with metallic conductivity. • Ti₂C/FeSe₂ delivers high capacity, long life, and high rate for SIBs. • Synergistic Na-storage mechanism of FeSe₂@S-Ti₂C revealed by DFT and in situ EIS/DRT analyses. The development of high-performance anode materials is critical for advancing sodium-ion batteries (SIBs) toward practical applications. Herein, we report a novel FeSe 2 @S-Ti 2 C heterostructure synthesized via a safe and straightforward Lewis acidic molten salt etching strategy followed by in-situ selenization. This approach enables simultaneous etching of Ti 2 AlC MAX phase, surface termination with sulfur-containing groups, and uniform anchoring of FeSe 2 nanoparticles within the Ti 2 C MXene matrix, eliminating the need for hazardous HF or post-synthesis metal removal. The resulting heterostructure integrates multiple advantageous features: The highly conductive Ti₂C MXene framework accelerates the transport of Na + , while its structural robustness effectively accommodates the volume expansion caused by Na + deintercalation. S-containing surface terminations provide additional active sites that enhance Na + adsorption. Ultimately, the FeSe₂@S-Ti₂C anode demonstrates exceptional sodium-storage performance, characterized by a high reversible capacity of 397.6 mAh g −1 after 350 cycles at 1 A g −1 , superior rate capability (227.8 mAh g −1 at 5 A g −1 ), as well as robust full-cell performance with an initial Coulombic efficiency of 91.2% and a reversible capacity of 493.6 mAh g −1 following 500 cycles at 1 A g −1 . Density functional theory calculations further elucidate the underlying mechanism, revealing metallic conductivity, reduced Na + diffusion barrier (0.30 eV), and enhanced Na adsorption energy (−2.43 eV) in the heterostructure. This work presents a versatile and scalable strategy for constructing advanced MXene-based heterostructures, offering promising avenues for high-performance SIB anodes. Description : Lewis acidic molten salt etching enables one-pot synthesis of FeSe₂@S–Ti₂C heterostructures; the conductive MXene framework with S-terminations and interfacial coupling deliver fast Na + diffusion and robust sodium storage. Download: Download high-res image (203KB) Download: Download full-size image
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2026
·Vol. 132
·期 8
·678
·
IF 3
Li Jianhui,Zhuang Shaoling
In this study, high-quality nanoselenium (quantitatively defined as monodisperse ~ 35 nm particles, high crystallinity, 99.6% purity, and good colloidal/thermal stability) was successfully fabricated via a facile heterogeneous titration approach, using selenium powder as the precursor, an ethylenediamine–ethanethiol binary mixture as the reaction medium, and deionized water (DI water) as the titrant. The product was systematically characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), zeta potential analysis, dynamic light scattering, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and X-ray photoelectron spectroscopy (XPS) to reveal its morphology, crystal structure, surface chemistry, and thermal stability. The results demonstrated that the as-prepared nanoselenium featured an average particle size of 35 nm (ascertained by TEM and XRD) and an average yield of 2.79 ± 0.01 g (99.6%) based on triplicate experiments, exhibiting excellent performance with ultra-small particle size and high synthetic efficiency. Further investigation revealed that the synergistic effect between ethylenediamine (acting as both reaction medium and stabilizer) and ethanethiol (serving as a capping agent) efficiently regulated the nucleation and growth of selenium nanoparticles, which is crucial for the superior product performance. This work presents a straightforward yet highly efficient heterogeneous titration strategy for producing high-quality nanoselenium, laying a solid foundation for its future application-oriented research.
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