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学者姓名：罗中箴
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Low-dimensional materials with charge density waves (CDW) are attractive for their potential to exhibit superconductivity and nontrivial topological electronic features. Here we report the two-dimensional (2D) chalcogenide, BaSbTe2S which acts as a new platform hosting these phenomena. The crystal structure of BaSbTe2S is composed of alternating atomically thin Te square-net layers and double rock-salt type [(SbTeS)2]2- slabs separated with Ba2+ atoms. Due to the electronic instability of the Te square net, an incommensurately modulated structure is triggered and confirmed by both single-crystal X-ray diffraction, electron diffraction, and the presence of an energy bandgap in this compound. Our first-principles electronic structure analysis and investigation of structural dynamical instability suggest that the Te network plays a dominant role in its origin. The incommensurate structure is refined with a modulation vector of q = 0.351(1)b* using an orthorhombic cell of a = 4.4696(5) & Aring;, b = 4.4680(5) & Aring;, and c = 15.999(2) & Aring; under superspace group Pmm2(0 beta 0)000 at 293 K. The modulation vector q varies as a function of both occupancy of Te in the square net and temperature, indicating the CDW order can be modulated by local distortions. The CDW can be suppressed by pressure, leading to the emergence of superconductivity with a T c up to 7.5 K at 13.6 GPa, suggesting a competition between the CDW order and superconductivity. Furthermore, electrical transport under the magnetic field reveals the existence of compensated high mobility electron- and hole-bands near the Fermi surface (mu similar to 600-3500 cm2V-1s-1), suggesting Dirac-like band dispersion.
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| GB/T 7714 | Luo, Zhong-Zhen , Zhao, Hengdi , Cai, Weizhao et al. Charge Density Wave and Superconductivity in BaSbTe2S Heterolayer Crystal with 2D Te Square Nets [J]. | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY , 2025 , 147 (8) : 6753-6762 . |
| MLA | Luo, Zhong-Zhen et al. "Charge Density Wave and Superconductivity in BaSbTe2S Heterolayer Crystal with 2D Te Square Nets" . | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 147 . 8 (2025) : 6753-6762 . |
| APA | Luo, Zhong-Zhen , Zhao, Hengdi , Cai, Weizhao , Shahabfar, Shima , Li, Juncen , Cai, Songting et al. Charge Density Wave and Superconductivity in BaSbTe2S Heterolayer Crystal with 2D Te Square Nets . | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY , 2025 , 147 (8) , 6753-6762 . |
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Birefringent crystals play an irreplaceable role in optical systems by adjusting the polarization state of light in optical devices. This work successfully synthesized a new thiophosphate phase of B-Pb3 P2 S8 through the high-temperature solid-state spontaneous crystallization method. Different from the cubic a-Pb3 P2 S8 , the B-Pb3 P2 S8 crystallizes in the orthorhombic Pbcn space group. Notably, B-Pb3 P2 S8 shows a large band gap of 2.37 eV in lead-based chalcogenides, wide infrared transparent window (2.5-15 mu m), and excellent thermal stability. Importantly, the experimental birefringence shows the largest value of 0.26@550 nm in chalcogenides, even larger than the commercialized oxide materials. The Barder charge analysis result indicates that the exceptional birefringence effect is mainly from the Pb2 + and S2- in the [PbSn ] polyhedrons. Meanwhile, the parallelly arranged polyhedral layers could improve the structural anisotropic. Therefore, this work supports a new method for designing chalcogenides with exceptional birefringence effect in the infrared region. (c) 2024 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
Keyword ：
Birefringent crystals Birefringent crystals Chalcogenides Chalcogenides Optical properties Optical properties Structural ansotropic Structural ansotropic
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| GB/T 7714 | Guo, Weiping , Zhu, Ying , Cui, Hong-Hua et al. B-Pb 3 P 2 S 8: A new optical crystal with exceptional birefringence effect [J]. | CHINESE CHEMICAL LETTERS , 2025 , 36 (2) . |
| MLA | Guo, Weiping et al. "B-Pb 3 P 2 S 8: A new optical crystal with exceptional birefringence effect" . | CHINESE CHEMICAL LETTERS 36 . 2 (2025) . |
| APA | Guo, Weiping , Zhu, Ying , Cui, Hong-Hua , Li, Lingyun , Yu, Yan , Luo, Zhong-Zhen et al. B-Pb 3 P 2 S 8: A new optical crystal with exceptional birefringence effect . | CHINESE CHEMICAL LETTERS , 2025 , 36 (2) . |
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While possessing outstanding electrical properties, suppressing the lattice thermal conductivity (kappa lat) is of great significance for achieving excellent thermoelectric materials. Here, based on optimizing electrical transport by transforming monoclinic Cu2SnS3 into a cubic phase, Halogen atoms are employed alloying to enhance anharmonicity, effectively suppressing phonon propagation in high-symmetry materials, thereby reducing kappa lat while maintaining excellent electrical transport properties. An alloying study of CuX (X = Cl, Br, I) with Cu2SnS3 is conducted and the correlation between anharmonicity and the ionic character in chemical bonds is examined. As symmetry increases, the power factor (PF) of the samples rises dramatically from 0.96 to 7.8 mu W cm-1 K-2, further increasing to 12.77 mu W cm-1 K-2 with the introduction of Sn vacancies. A comprehensive analysis of band structure, anharmonicity, and lattice distortion reveals that the CuBr-alloyed sample exhibits significantly higher performance compared to the other variations. Ultimately, the optimized Cu2Sn0.94S3-20 mol% CuBr reaches a peak ZT of 1.17 at 773 K and achieves one of the highest average ZT of 0.70 within the Cu2SnS3 system. These findings highlight the potential of harnessing halogen-induced anharmonic effects to facilitate high-performance thermoelectric applications, underscoring the viability of Cu2SnS3 as a candidate for sustainable energy solutions.
Keyword ：
anharmonicity anharmonicity fraction of ionicity fraction of ionicity halogen alloying halogen alloying thermoelectric thermoelectric ultrahigh average ZT ultrahigh average ZT
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| GB/T 7714 | Wan, Jia , Li, Lan , Lin, Chensheng et al. Harnessing Halogen-Induced Anharmonic Effect to Achieve Low Lattice Thermal Conductivity in High-Symmetry Cu2SnS3 for High-Performance Thermoelectric Applications [J]. | ADVANCED FUNCTIONAL MATERIALS , 2025 . |
| MLA | Wan, Jia et al. "Harnessing Halogen-Induced Anharmonic Effect to Achieve Low Lattice Thermal Conductivity in High-Symmetry Cu2SnS3 for High-Performance Thermoelectric Applications" . | ADVANCED FUNCTIONAL MATERIALS (2025) . |
| APA | Wan, Jia , Li, Lan , Lin, Chensheng , Wu, Yi , Cheng, Zhipeng , Luo, Zhongzhen et al. Harnessing Halogen-Induced Anharmonic Effect to Achieve Low Lattice Thermal Conductivity in High-Symmetry Cu2SnS3 for High-Performance Thermoelectric Applications . | ADVANCED FUNCTIONAL MATERIALS , 2025 . |
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Electrochemical CO2 reduction reaction (CO2RR) represents a sustainable approach to alleviate the global concern associated with excessive CO2 emission. Recently, metal-based sulfides are emerged as a special class of electrocatalysts for efficient formate production, which however suffer from massive S loss during CO2RR due to the compositional reduction. Herein, we synthesize a series of tin sulfides with high crystallinity (i.e., SnS, Sn2S3, and SnS2) as model catalysts, and reveal that the strength distribution of Sn-S bonds in atomic configurations is essential for efficient formate production. Typically, the strong and uniformly distributed Sn-S bonds in SnS2 are beneficial for inhibiting S leaching and forming favorable Sn/SnS2 heterointerfaces for CO2RR, while the weaker Sn-S bonds in SnS promote the reduction into metallic Sn. Specially, the Sn2S3 with mixed bonding strengths undergoes consecutive dissociation, starting from cleaving the weakest Sn-S bonds and then inducing accelerative reduction. Resultantly, the SnS2 achieves the highest Faraday efficiency of 93.8%+/- 0.59% at -1.0 V-RHE and a high partial current density of 195.3 mA cm(-2) at -1.2 V-RHE. This study could provide insight into the role of metal-sulfur bonds in catalysts for efficient CO2-to-formate conversion.
Keyword ：
bond strength bond strength CO2 reduction CO2 reduction formate formate S loss S loss tin sulfides tin sulfides
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| GB/T 7714 | Hou, Guoyu , Cui, Honghua , Li, Yicheng et al. Strong and uniform Sn-S bond strength in tin sulfides-based electrocatalysts enables efficient CO2-to-formate conversion [J]. | SCIENCE CHINA-MATERIALS , 2025 . |
| MLA | Hou, Guoyu et al. "Strong and uniform Sn-S bond strength in tin sulfides-based electrocatalysts enables efficient CO2-to-formate conversion" . | SCIENCE CHINA-MATERIALS (2025) . |
| APA | Hou, Guoyu , Cui, Honghua , Li, Yicheng , Liu, Ya , Yang, Zhenyi , Zhao, Ming et al. Strong and uniform Sn-S bond strength in tin sulfides-based electrocatalysts enables efficient CO2-to-formate conversion . | SCIENCE CHINA-MATERIALS , 2025 . |
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The Ag-based superionic argyrodites with liquid-like ultralow lattice thermal conductivity have garnered widespread attention as promising thermoelectric materials. However, the inferior performance of n-type argyrodites does not match the p-type counterpart for device construction. Here, the two new cubic n-type Ag-based argyrodite compounds Ag4M0.5S2Te (M = Sn and Ge) are synthesized. They crystallize in the F (4) over bar 3m space group with excellent structural stability. The unique triangular [AgS2Te](5-), rod-like [AgSTe](3-), and complex cage-like [Te4Ag36](28+) clusters together with the vibrations of weakly bonded Ag+ ions result in large lattice anharmonicity and enhance the scatter of acoustic phonons. These structure characters lead to the ultralow lattice thermal conductivity (kappa(lat)) of 0.30-0.32 W m(-1) K-1 near the amorphous limit 0.24 W m(-1) K-1 at 525-823 K. Moreover, the power factor enhanced from 1.53 mu W cm(-1) K-2 for Ag4Sn0.5S2Te to 2.61 mu W cm(-1) K-2 by introducing Te deficiencies, resulting in a high ZT of 0.74 at 823 K for Ag4Sn0.5S2Te0.92, which is 95 % higher than that of the pristine sample.
Keyword ：
Ag4Sn0.5S2Te Ag4Sn0.5S2Te liquid-like argyrodites liquid-like argyrodites Te deficiencies Te deficiencies thermoelectric materials thermoelectric materials ultralow thermal conductivity ultralow thermal conductivity
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| GB/T 7714 | Yang, Ya , Yuan, Liling , Chen, Zixuan et al. The New Cubic Argyrodites: Ag4M0.5S2Te (M = Sn and Ge) with Ultralow Thermal Conductivity [J]. | ADVANCED FUNCTIONAL MATERIALS , 2025 . |
| MLA | Yang, Ya et al. "The New Cubic Argyrodites: Ag4M0.5S2Te (M = Sn and Ge) with Ultralow Thermal Conductivity" . | ADVANCED FUNCTIONAL MATERIALS (2025) . |
| APA | Yang, Ya , Yuan, Liling , Chen, Zixuan , Guo, Weiping , Zheng, Yunpeng , Ming, Hongwei et al. The New Cubic Argyrodites: Ag4M0.5S2Te (M = Sn and Ge) with Ultralow Thermal Conductivity . | ADVANCED FUNCTIONAL MATERIALS , 2025 . |
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Thermoelectric materials hold great potential for direct conversion of ubiquitous waste heat into electricity. However, their commercialization is hindered by low efficiency, reliance on rare and expensive Te, and limited stability under operating conditions. This review explores recent advances in novel strategies for achieving high thermoelectric performance and stability in Te-free inorganic bulk materials. First, we discuss diverse innovative techniques aimed at substantially enhancing electrical transport properties. These methods encompass strategies such as charge carrier engineering, band convergence, band inversion, valley anisotropy, multiband synglisis, and the incorporation of resonant levels or midgap states. Then we focus on strategies to reduce lattice thermal conductivity, including phonon scattering induced by multidimensional defects, off-center doping, resonance scattering, and lattice softening. Additionally, this review presents strategies for decoupling electron and phonon transport to enhance the thermoelectric performance of materials further. The strategies include interface engineering, crystal symmetry manipulation, high-entropy engineering and nanostructuring, high-pressure technology, and magnetically enhanced thermoelectrics. Moreover, we highlight novel strategies for improving the chemical and thermal stability of materials under operating conditions. Last, we discuss current controversies and challenges and suggest future directions for further research to improve the thermoelectric performance of Te-free bulk materials.
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| GB/T 7714 | Ming, Hongwei , Luo, Zhong-Zhen , Zou, Zhigang et al. Strategies and Prospects for High-Performance Te-Free Thermoelectric Materials [J]. | CHEMICAL REVIEWS , 2025 , 125 (7) : 3932-3975 . |
| MLA | Ming, Hongwei et al. "Strategies and Prospects for High-Performance Te-Free Thermoelectric Materials" . | CHEMICAL REVIEWS 125 . 7 (2025) : 3932-3975 . |
| APA | Ming, Hongwei , Luo, Zhong-Zhen , Zou, Zhigang , Kanatzidis, Mercouri G. . Strategies and Prospects for High-Performance Te-Free Thermoelectric Materials . | CHEMICAL REVIEWS , 2025 , 125 (7) , 3932-3975 . |
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Here, we investigate PbSnS2, a wide band gap (1.13 eV) compound, as a promising thermoelectric material for power generation. Single crystal X-ray diffraction analysis reveals its 2D-layered structure, akin to the GeSe structure type, with Pb and Sn atoms sharing the same crystallographic site. The polycrystalline PbSnS2 exhibits an intrinsically ultralow lattice thermal conductivity (kappa(lat)) of 0.37 W m(-1) K-1 at 573 K. However, the low carrier concentration (n) leads to suboptimal electrical conductivity (sigma), capping the ZT value at 0.1. Accordingly, the halogen elements (Cl, Br, and I) are employed as the n-type dopants to improve the n. The DFT results indicate a significant weakening of Pb/Sn & horbar;S bonds upon halogen-doping, contributing to the observed reduction in kappa(lat). Our analysis indicates the activation of multiconduction band transport driven by halogen substitution. The PbSnS1.96Br0.04 has a high power factor of five times that of intrinsic PbSnS2. Halogen-doping weakens the Pb/Sn & horbar;S bonds and enhances the phonon scattering, leading to an ultralow kappa(lat) of 0.29 W m(-1) K-1 at 873 K for PbSnS1.96Br0.04. Consequently, PbSnS1.96Br0.04 achieved a maximum ZT value of 0.82 at 873 K.
Keyword ：
Halogen-doping Halogen-doping PbSnS2 PbSnS2 Single crystal Single crystal Thermoelectricity Thermoelectricity Ultralow thermal conductivity Ultralow thermal conductivity
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| GB/T 7714 | Chen, Zixuan , Ming, Hongwei , Li, Zhi et al. Ultralow Thermal Conductivity in Halogen-Doped PbSnS2 with Optimized Thermoelectric Properties [J]. | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2025 . |
| MLA | Chen, Zixuan et al. "Ultralow Thermal Conductivity in Halogen-Doped PbSnS2 with Optimized Thermoelectric Properties" . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2025) . |
| APA | Chen, Zixuan , Ming, Hongwei , Li, Zhi , Girard, Steven N. , Morris, Collin D. , Guo, Weiping et al. Ultralow Thermal Conductivity in Halogen-Doped PbSnS2 with Optimized Thermoelectric Properties . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2025 . |
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Hydrogel thermocells possess great potential in the energy conversion field as they directly absorb waste heat from the environment to drive redox reactions for continuous electricity generation. However, achieving high toughness and good elasticity simultaneously in hydrogel thermocells remains a challenge because of the inherent contradiction of energy dissipation mechanisms, severely limiting their practical applications and lifespan. To address this, a skin-like hydrogel network with a highly dense interwoven network is developed to construct hydrogel thermocells with good elasticity and high toughness. The dense network structure can effectively disperse the stress and hinder crack propagation, thus breaking the contradiction between high toughness and good elasticity. The thermocell realizes a toughness of 460 J m−2 while reaching an elastic limit strain of 350 %, far exceeding the elasticity of previous stretchable hydrogel thermocells. Meanwhile, it exhibits ultra-low hysteresis and excellent fatigue resistance under tensile and compressive cyclic loads. Moreover, the thermocell can work stably over long periods, enabling stable voltage output even under compression, bending, and stretching. In addition, the thermocell can power the LED lamp and calculator, and can also be connected in series to form large arrays, thus rendering it an ideal power source for wearable devices. © 2024 Elsevier B.V.
Keyword ：
Ductile fracture Ductile fracture Elasticity Elasticity Electric loads Electric loads Energy dissipation Energy dissipation Energy utilization Energy utilization Hydrogels Hydrogels Redox reactions Redox reactions Waste heat Waste heat Wearable technology Wearable technology
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| GB/T 7714 | Lyu, Xiaolin , Lin, Ziqing , Huang, Chunzhi et al. Tough and elastic hydrogel thermocells for heat energy utilization [J]. | Chemical Engineering Journal , 2024 , 493 . |
| MLA | Lyu, Xiaolin et al. "Tough and elastic hydrogel thermocells for heat energy utilization" . | Chemical Engineering Journal 493 (2024) . |
| APA | Lyu, Xiaolin , Lin, Ziqing , Huang, Chunzhi , Zhang, Xinyue , Lu, Yang , Luo, Zhong-Zhen et al. Tough and elastic hydrogel thermocells for heat energy utilization . | Chemical Engineering Journal , 2024 , 493 . |
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Low-cost copper (Cu)-based electrocatalysts have been widely established with the special capability of generating C2+ products from the CO2 reduction reaction (CO2RR). However, efficient formate production has been rarely achieved due to the instant reduction of most reported Cu-based catalysts upon CO2RR, and the derived metallic Cu compromises the C1 selectivity. Herein, we demonstrate that the incorporation of alkali metal ions is intrinsically effective for stabilizing the Cu(I)-S bonds by forming ternary copper sulfides (M-Cu(I)-S, M = Na, K, and Rb). The strengthened Cu-S bonds can be well preserved in M-Cu(I)-S during the CO2RR, contributing to the protonation effect and thus highly efficient production of formate. Moreover, the M-Cu(I)-S catalysts also exhibit enhanced electrical conductivity relative to that of Cu2S, favorably promoting the reaction kinetics. Accordingly, the RbCu7S4 as a representative catalyst achieves a Faradaic efficiency of 90.4 ± 1.3% for formate at only −0.7 V versus reversible hydrogen electrode (VRHE), with a high partial current density of 272.1 mA cm-2 and stable operation over 72 h. This study could provide a different series of Cu-based electrocatalysts for efficient formate production on an industrial scale from the CO2RR. © 2024 American Chemical Society.
Keyword ：
alkali metal alkali metal CO2 reduction CO2 reduction Cu-based catalyst Cu-based catalyst Cu−S bond Cu−S bond formate formate
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| GB/T 7714 | Cui, X. , Wu, M. , Hou, G. et al. Alkali Metal Ions Stabilizing Copper(I)-Sulfur Bonds for Efficient Formate Production from Electrochemical CO2 Reduction [J]. | ACS Catalysis , 2024 , 14 (15) : 11857-11864 . |
| MLA | Cui, X. et al. "Alkali Metal Ions Stabilizing Copper(I)-Sulfur Bonds for Efficient Formate Production from Electrochemical CO2 Reduction" . | ACS Catalysis 14 . 15 (2024) : 11857-11864 . |
| APA | Cui, X. , Wu, M. , Hou, G. , Li, Y. , Wang, Y. , Huang, J. et al. Alkali Metal Ions Stabilizing Copper(I)-Sulfur Bonds for Efficient Formate Production from Electrochemical CO2 Reduction . | ACS Catalysis , 2024 , 14 (15) , 11857-11864 . |
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Low-cost copper (Cu)-based electrocatalysts have been widely established with the special capability of generating C2+ products from the CO2 reduction reaction (CO2RR). However, efficient formate production has been rarely achieved due to the instant reduction of most reported Cu-based catalysts upon CO2RR, and the derived metallic Cu compromises the C-1 selectivity. Herein, we demonstrate that the incorporation of alkali metal ions is intrinsically effective for stabilizing the Cu(I)-S bonds by forming ternary copper sulfides (M-Cu(I)-S, M = Na, K, and Rb). The strengthened Cu-S bonds can be well preserved in M-Cu(I)-S during the CO2RR, contributing to the protonation effect and thus highly efficient production of formate. Moreover, the M-Cu(I)-S catalysts also exhibit enhanced electrical conductivity relative to that of Cu2S, favorably promoting the reaction kinetics. Accordingly, the RbCu7S4 as a representative catalyst achieves a Faradaic efficiency of 90.4 +/- 1.3% for formate at only -0.7 V versus reversible hydrogen electrode (V-RHE), with a high partial current density of 272.1 mA cm(-2) and stable operation over 72 h. This study could provide a different series of Cu-based electrocatalysts for efficient formate production on an industrial scale from the CO2RR.
Keyword ：
alkali metal alkali metal CO2 reduction CO2 reduction Cu-basedcatalyst Cu-basedcatalyst Cu-S bond Cu-S bond formate formate
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| GB/T 7714 | Cui, Xianglong , Wu, Ming , Hou, Guoyu et al. Alkali Metal Ions Stabilizing Copper(I)-Sulfur Bonds for Efficient Formate Production from Electrochemical CO2 Reduction [J]. | ACS CATALYSIS , 2024 , 14 (15) : 11857-11864 . |
| MLA | Cui, Xianglong et al. "Alkali Metal Ions Stabilizing Copper(I)-Sulfur Bonds for Efficient Formate Production from Electrochemical CO2 Reduction" . | ACS CATALYSIS 14 . 15 (2024) : 11857-11864 . |
| APA | Cui, Xianglong , Wu, Ming , Hou, Guoyu , Li, Yicheng , Wang, Yinuo , Wang, Yian et al. Alkali Metal Ions Stabilizing Copper(I)-Sulfur Bonds for Efficient Formate Production from Electrochemical CO2 Reduction . | ACS CATALYSIS , 2024 , 14 (15) , 11857-11864 . |
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