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Enhanced thermoelectric performance and atomic-resolution interfacial structures in BiSbTe thermo-electro-magnetic nanocomposites incorporating magnetocaloric LaFeSi nanoparticles

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Journal of Materiomics 2021年第5期7卷 998-1006页

作者： Lin Xing Wenjun Cui Xiahan Sang Fengxia Hu Ping Wei Wanting Zhu Xiaolei Nie Qingjie Zhang Wenyu Zhao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China NRC(Nanostructure Research Centre) Wuhan University of TechnologyWuhan430070China State Key Laboratory for Magnetism Institute of PhysicsChinese Academy of SciencesBeijing100190China

Incorporating magnetic nanoparticles in thermoelectric(TE)materials introduce magnetic interfaces with additional electron and phonon scattering mechanism for high TE ***,the influence of heterogeneous interfaces between magnetic nanoparticles and TE matrix on electronic and thermal transport remains elusive in the thermo-electric-magnetic ***,using p-type TE material Bi_(0.3)Sb_(1.7)Te_(3)(BST)as matrix and magnetocaloric(MC)material La(Fe_(0.92)Co_(0.08))_(11.9)Si_(1.1)(LFS)nanoparticles as a second phase,TE/MC nanocomposites xLFS/BST(x=0.1%,0.2%,0.3% and 0.4%)were synthesized using spark plasma sintering *** atomic-resolution interfacial structures demonstrate that Te vacancies originating from LFS-BST interfacial reaction decreases the hole concentration of the LFS/BST nanocomposites and enhances the Seebeck *** LFS/BST nanocomposites exhibit lower thermal conductivity due to enhanced phonon scattering by interfaces and *** the nanocomposites have higher ZT than BST matrix,with 0.2% LFS/BST nanocomposite achieving highest ZT=1.11 at 380 *** working current 1.4 A,the device fabricated using 0.2% LFS/BST nanocomposite achieves maximal cooling temperature 4.9 K,which is 58% higher than the ***,the MC properties are retained in all the nanocomposites,which make them a promising candidate to achieve high TE performance and dual TE/MC properties for future applications.

关键词： Thermoelectrics Magnetocaloric materials Bi_(2)Te_(3)La(Fe,Si)_(13) Microstructure Thermoelectric properties

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Ab-initio insight into electrochemical characteristic of Zr2N monolayer as sodium ion battery by O and Se functional group strategy

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Journal of Molecular Liquids 2025年 429卷

作者： Yin, Jiangtao Li, Lingxia Zhang, Wenbo Gong, Shengli Ren, Junqiang Liu, Maocheng Lu, Xuefeng State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China

As a novel type of two-dimensional electrode material, MXene with versatile surface functional groups can provide additional active sites, exhibiting high pseudo capacitance and large specific capacity. This article uses first principles to investigate the electrochemical properties of oxygen and halogen elements modified Zr2N as anode materials for sodium ion batteries. The results indicate that O and Se functionalized Zr2N material is more suitable as an anode material for sodium ion batteries compared to other functionalized materials. Zr2NT2 (Zr2NO2 and Zr2NSe2) have low diffusion barriers to facilitate the diffusion of sodium ions, with a theoretical capacity of 293.29 mAh/g and 151.29 mAh/g, respectively. The open circuit voltage is in the range of 0–1 V, which can prevent the formation of lithium dendrites and ensure the safe operation of the battery. These characteristics are attributed to the redistribution of surface charges for functionalized Zr2N, which results in uniform interaction forces between adsorbed atoms and the matrix, thereby improving the adsorption stability of sodium ions. In summary, this study reveals the energy storage performance mechanism of O and Se functionalized MXene electrode materials at the microscale, laying a solid foundation for subsequent experimental preparation. © 2025 Elsevier B.V.

关键词： Active material Electronic properties First-principles calculations MXene Sodium-ion batteries

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Mn4+activated phosphors in photoelectric and energy conversion devices

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能源化学 2023年第11期86卷 277-299页

作者： Yang Ding Chunhua Wang Lang Pei Qinan Mao Sateesh Bandaru Runtian Zheng Soumyajit Maitra Meijiao Liu Li-Hua Chen Bao-Lian Su Jiasong Zhong College of Materials and Environmental Engineering Hangzhou Dianzi UniversityHangzhou 310018ZhejiangChina School of Energy and Environment City University of Hong KongKowloon 99077Hong KongChina Laboratory of Inorganic Materials Chemistry(CMI) University of Namur61 rue de Bruxelles B-5000NamurBelgium Department of Materials University of OxfordOxford OX1 3PHUK School of Chemistry and Chemical Engineering Zhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Laboratory of Inorganic Materials Chemistry(CMI) University of Namur61 rue de Bruxelles B-5000NamurBelgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina

Owing to their high luminous efficiency and tunable emission in both red light and far-red light regions,Mn4+ ion-activated phosphors have appealed significant interest in photoelectric and energy conversion devices such as white light emitting diode(W-LED),plant cultivation LED,and temperature *** to now,Mn4*has been widely introduced into the lattices of various inorganic hosts for brightly red-emitting ***,how to correlate the structure-activity relationship between host frame-work,luminescence property,and photoelectric device is urgently *** this review,we thor-oughly summarize the recent advances of Mn4+doped ***,several strategies like co-doping and defect passivation for improving Mn4+ emission are also *** importantly,the relationship between the protocols for tailoring the structures of Mn4+doped phosphors,increased luminescence performance,and the targeted devices with efficient photoelectric and energy conversion efficiency is deeply ***,the challenges and perspectives of Mn4+doped phosphors for prac-tical applications are *** cordially anticipate that this review can deliver a deep comprehen-sion of not only Mn4+luminescence mechanism but also the crystal structure tailoring strategy of phosphors,so as to spur innovative thoughts in designing advanced phosphors and deepening the applications.

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Structural Evolution and Thermoelectric Performance in (Gete)M(Sb2te3)N Compounds

SSRN

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SSRN 2024年

作者： Chen, Shuo Liu, Keke Luo, Tingting Liao, Lin Yang, Zhen Zhong, Shenlong Wu, Jinsong Su, Xianli Poudeu, Pierre Ferdinand Poudeu Zhang, Qingjie Tang, Xinfeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States

Exploring the relationship between crystal structure and thermoelectric performance is a pivotal topic in the thermoelectric field. In this study, we have conducted a comprehensive investigation on the correlation between the structural evolution of (GeTe)m(Sb2Te3)n pseudo-binary system and the thermoelectric properties. The proportion of van der Waals bonds increase with the rising Sb2Te3 content, resulting in an increase in the anisotropy of the electrical conductivity and a decrease in the average sound velocity. Additionally, the cation sites in the crystal lattice of these compounds exhibit a mixed occupancy of Ge/Sb atoms, although the cation sites adjacent to the van der Waals gaps are predominantly occupied by Sb atoms. The ultra-low lattice thermal conductivity of the GST124 and GST147 compounds is mainly attributed to the high concentration of van der Waals bonds and enhanced phonon scattering arising from Ge/Sb mixed cation occupancy and high density of defect structures. The high electrical conductivity combined with the low lattice thermal conductivity enables GST124 and GST147 compounds to achieve a maximum ZT value of 0.56 and 0.57, respectively. Higher thermoelectric performance can be achieved through optimization of the microstructure as well as the carrier concentration. © 2024, The Authors. All rights reserved.

关键词： Anisotropy

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Regulation of Dynamic Recrystallization in p-Type Bi2Te3-Based Compounds Leads to High Thermoelectric Performance and Robust Mechanical Properties

SSRN

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SSRN 2024年

作者： Chen, Shuo Luo, Tingting Yang, Zhen Zhong, Shenlong Su, Xianli Yan, Yonggao Wu, Jinsong Poudeu, Pierre Ferdinand Poudeu Zhang, Qingjie Tang, Xinfeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States

Bi2Te3-based bulk materials are the best commercially available thermoelectric materials for near room temperature applications. However, the poor mechanical properties of zone melting material and inferior thermoelectric performance of powder metallurgical material restrict their large scale deployment. In this study, p-type Bi₂Te₃-based materials were prepared using the hot extrusion technique, and the underlying mechanisms for microstructure evolution were revealed. The hot extrusion speed significantly impacts the strain rate, an indicator to modulate the dynamic recrystallization (DRX) and grain growth, thereby effectively regulating the microstructures of samples. For the sample extruded at a speed of 1.0 mm min-1, the refined grain with an average grain size of 1.53 μm and an orientation factor F(110) of 0.28 is achieved. This highly textured structure and high-density low-angle boundaries (LAGBs) maintain the high carrier mobility of 264 cm2 V-1 s-1, comparable with the zone melting sample. In contrast, increasing grain boundaries, dislocations, and inherent point defects intensifies the phonon scattering and suppresses the lattice thermal conductivity to 0.73 W m-1 K-1. All these contribute to a practical high ZT value of 1.1 at room temperature. Moreover, the fine grains and high-density dislocations ensure robust mechanic properties with a compressive strength of 189 MPa and a bending strength of 139 MPa, which is a guarantee for the successful cutting of microparticles with dimensions of 100 × 100 × 200 μm3. The fabrication of high-quality materials with both high thermoelectric performance and strong mechanical properties paves the way for the miniaturization of thermoelectric modules. © 2024, The Authors. All rights reserved.

关键词： Textures

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Influence of pore size optimization in catalyst layer on the mechanism of oxygen transport resistance in PEMFCs

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Progress in Natural Science:materials International 2020年第6期30卷 839-845页

作者： Shumeng Guan Fen Zhou Jinting Tan Mu Pan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Provincial Key Laboratory of Fuel Cells Wuhan University of Technology

In PEMFC, the oxygen transport resistance severely hinders the cell from achieving high performance. In this paper, pore-forming agent was used to optimize the pore size distribution of the catalyst layer(CL), and to study its effect on the mechanism of oxygen transport resistance, including molecular diffusion resistance, Knudsen diffusion resistance, and local O2resistance in CL. The results showed that with the pore formation the cell performance had a significant improvement at high current density, mainly due to its better oxygen transport properties, especially under low platinum conditions. The addition of pore-forming agent moved the pore diameter toward a larger pore diameter with a range from 70 to 100 nm, and also obtaining a higher cumulative pore volume. It was found that the increase of the cumulative pore volume and larger pore size were conducive to the diffusion of oxygen molecules in CL, and the resistance caused by which was the dominant part in total transport resistance. Further tests indicated that the improvement of molecular diffusion resistance was much larger than that of Knudsen diffusion resistance in the catalyst layer after pore formed. In addition, the optimized pore structure will also get a higher number of effective pores, which resulted in an increased effective area of the ionomer on the Pt surface. The higher effective area of the ionomer was particularly beneficial for the reduction of local O2resistance with low Pt loading.

关键词： Pore size optimization Pore-forming agent Oxygen transport resistance PEMFC

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基于一步法制备超高PEO负载的亲CO_(2)气体分离膜用于高效碳捕集

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Engineering 2023年第7期26卷 220-228,I0009页

作者：朱斌赫羴珊吴亚东李松伟邵路 MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and ChemicalHarbin Institute of TechnologyHarbin 150001China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing Technology Department of Chemical EngineeringZhengzhou UniversityZhengzhou 450002China

针对日益增加的大气CO_(2)含量,膜技术被认为是一种有前景的碳捕集策略,其中亲CO_(2)分离膜已经展示出显著的应用潜力,特别是在CO_(2)/轻质气体分离方面。以聚环氧乙烷(PEO)为代表的CO_(2)亲和材料,因其与CO_(2)的特殊偶极-四极矩相互... 详细信息

针对日益增加的大气CO_(2)含量,膜技术被认为是一种有前景的碳捕集策略,其中亲CO_(2)分离膜已经展示出显著的应用潜力,特别是在CO_(2)/轻质气体分离方面。以聚环氧乙烷(PEO)为代表的CO_(2)亲和材料,因其与CO_(2)的特殊偶极-四极矩相互作用而吸引了广泛的研究关注。在此,我们报道了一种简便的一步合成方案,通过原位聚合高度柔性的小分子PEO来克服其高结晶度和低机械强度的局限性。得益于短链PEO与聚合物基体之间的复杂链缠绕,使线性PEO的负载高达90%(质量分数)。因此,分离性能轻松超过了著名的分离上限。此外,高结构稳定性使得分离膜在高进料压力(高达20 bar)下表现出更好的CO_(2)渗透系数和气体选择性。本研究同时改善了全聚合物膜的机械性能和气体分离性能,在工业碳捕集和气体净化领域展现出显著潜力。

关键词： Membrane separation Gas separation CO_(2)capture CO_(2)-philic membrane Poly(ethylene oxide)

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Au23（CR）14 nanocluster restores fibril Aβ's unfolded state with abolished cytotoxicity and dissolves endogenous Aβplaques

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National Science Review 2020年第4期7卷 763-774页

作者： Wenkang Zhang Guanbin Gao Zhongjie Ma Zhuoying Luo Meng He Taolei Sun State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology

The misfolding of amyloid-β（Aβ） peptides from the natural unfolded state to β-sheet structure is a critical step, leading to abnormal fibrillation and formation of endogenous Aβ plaques in Alzheimer's disease（AD）. Previous studies have reported inhibition of Aβ fibrillation or disassembly of exogenous Aβ fibrils in vitro. However, soluble Aβ oligomers have been reported with increased cytotoxicity; this might partly explain why current clinical trials targeting disassembly of Aβ fibrils by anti-Aβ antibodies have failed so *** we show that Au23（CR）14(a new Au nanocluster modified by Cys-Arg（CR） dipeptide) is able to completely dissolve exogenous mature Aβ fibrils into monomers and restore the natural unfolded state of Aβ peptides from misfolded β-sheets. Furthermore, the cytotoxicity of Aβ40fibrils when dissolved by Au23（CR）14is fully abolished. More importantly, Au23（CR）14is able to completely dissolve endogenous Aβ plaques in brain slices from transgenic AD model mice. In addition, Au23（CR）14has good biocompatibility and infiltration ability across the blood–brain barrier. Taken together, this work presents a promising therapeutics candidate for AD treatment, and manifests the potential of nanotechnological approaches in the development of nanomedicines.

关键词： gold nanoclusters Alzheimer’s disease restores fibril Aβ’s unfolded state abolished cytotoxicity dissolves endogenous Aβ plaques

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Hot Deformation Behavior and Microstructure Evolution of Electrolytic Copper

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稀有金属材料与工程 2025年第4期54卷 920-929页

作者： Zhang Han Sang Chen Zhang Yan Xu Yangtao Qiao Jisen Xia Tiandong School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China Jinchuan Group Copper Co. LtdJinchang 737100China

The hot deformation behavior of electrolytic copper was investigated using a Gleeble-3500 thermal simulation testing machine at temperatures ranging from 500℃ to 800℃ and strain rates ranging from 0.01 s^(-1) to 10 s^(-1),under 70% deformation *** true stress-true strain curves were analyzed and a constitutive equation was established at a strain of *** on the dynamic material model proposed by Prasad,processing maps were developed under different strain *** of compressed sample was observed by electron backscatter *** results reveal that the electrolytic copper demonstrates high sensitivity to deformation temperature and strain rate during high-temperature plastic *** flow stress decreases gradually with raising the temperature and reducing the strain *** to the established processing map,the optimal processing conditions are determined as follows:deformation temperatures of 600-650℃ and strain rates of 5-10 s^(-1).Discontinuous dynamic recrystallization of electrolytic copper occurs during high-temperature plastic deformation,and the grains are significantly refined at low temperature and high strain rate conditions.

关键词： electrolytic copper hot deformation constitutive equation dynamic recrystallization

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Ammonium Ion and Structural Water Co-Assisted Zn^(2+) Intercalation/De-Intercalation in NH_(4)V_(4)O_(10)∙0.28H_(2)O

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Chinese Journal of Chemistry 2021年第7期39卷 1885-1890页

作者： Ting Zhu Bo Mai Ping Hu Ziang Liu Congcong Cai Xuanpeng Wang Liang Zhou State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanHubei430070 China Department of Physical Science&Technology School of ScienceWuhan University of TechnologyWuhanHubei430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshanGuangdong528200 China

Main observation and conclusion The cathode material plays a crucial role in the performances of aqueous zinc-ion batteries(ZIBs).Herein,we report an ammonium vanadate(NH_(4)V_(4)O_(10)∙0.28H_(2)O,NHVO)aqueous ZIB cat... 详细信息

关键词： Aqueous zinc-ion battery Cathode material Vanadates Zincates Electrochemistry

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