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先进钠离子电池材料的前景与展望

Science Bulletin 2023年第20期68卷 2302-2306页

作者：谷振一王晓彤衡永丽张凯洋梁皓杰杨佳霖洪辉祥王鹏飞尤雅杜菲吴兴隆 MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024China Natural Sciences and Science Education National Institute of EducationNanyang Technological UniversitySingapore 637616Singapore State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education) State Key Laboratory of Superhard MaterialsCollege of PhysicsJilin UniversityChangchun 130012China Department of Chemistry Northeast Normal UniversityChangchun 130024China Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal UniversityGanzhou 341000China

According to the reports of"Top Ten Emerging Technologies in Chemistry 2022"released by the International Union of Pure and Applied Chemistry,sodium-ion battery(SIB)technology is identified as a crucial emerging technology,indicating its promising development for future energy-storage applications[1].In practical applications,commercialized lithium-ion batteries(LIBs)with lithium cobalt oxide and ternary oxide as cathode materials have assumed a dominant position[2].However,these cathode materials of LIBs are highly dependent on expensive cobalt and nickel,rendering them less sustainable for grid-scale energy ***,cathode materials in SIBs appear more sustainable due to their lower dependence on ***,the strategic importance of reducing over-dependence on lithium resources cannot be ***,SIB technology can serve as one of the potential solutions to mitigate this issue[3].

关键词：钠离子电池 battery lithium

Influence of Lattice Strain on the Mechanical Properties of Cosb3 Skutterudites

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SSRN 2023年

作者： Duan, Bo Li, Jialiang Zhang, Xiaolian Li, Guodong Ma, Yuxi Xu, Hao School of Civil Engineering & Architecture Wuhan Polytechnic University Wuhan430023 China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Elemental doping has been widely employed to manipulate the electrical and thermal transport properties of thermoelectric materials, without considering the influence to mechanical properties. In skutterudites, electronegative S-dopants have been found to reduce the lattice thermal conductivity. However, the effect of the covalent S-Sb bond on the mechanical properties of CoSb3 skutterudites remains unexplored. Compressive strength, in particular, exhibits a significant reduction in S-doped skutterudites, measuring only 249 MPa, representing a nearly 50% decrease compared to binary skutterudites. Additionally, there is a noticeable drop in the elastic, bulk and shear modulus. With molecular dynamics calculations, the shear strength of S-doped skutterudites also follows a sharp drop at a small ultimate strain. The evolutions of atomic configurations reveal that the lattice strain induced by S-dopants softens the Sb-Sb bond, ultimately leading to structure collapse under low shear stress conditions. These findings underscore the necessity for a comprehensive approach to elemental doping in thermoelectric community. © 2023, The Authors. All rights reserved.

关键词： Strain

Effect of Additive Content on Texture Evolution and Mechanical Properties of Si3N4 Ceramics Prepared by Hot Pressing

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SSRN 2023年

作者： Shi, Yunwei He, Qianglong Wang, Aiyang Ren, Yichao Wang, Jinghan Wang, Hao Wang, Weimin Fu, Zhengyi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Hubei Longzhong Laboratory Hubei Xiangyang441000 China

The purpose of this research is to investigate influence of additive content on sintering behavior, texture evolution and mechanical properties of Si3N4 ceramics systematically. Si3N4 ceramics with different additive contents are prepared by hot pressing at 1750 °C for 1h. XRD analysis confirms that the densification process is dominated by particle rearrangement instead of phase transformation. Grain morphology characterization demonstrates that additive content affects relative amount between textured [[EQUATION]]-Si3N4 grains and [[EQUATION]]-Si3N4 nuclei during initial sintering. During subsequent sintering, [[EQUATION]]-Si3N4 nuclei surrounded by residual liquid phase elongated randomly, and then weaken texture degree of Si3N4 ceramics. The texture degree of Si3N4 ceramics decreases first and then increases as additives increase steadily. Based on the CTE misfit model and the stochastic model of crack propagation, texture degree, residual stress and grain size have a synergistic effect on crack propagation behavior of [[EQUATION]]-Si3N4 ceramics. The outstanding flexural strength (1096 MPa) and fracture toughness (10.61 MPa[[EQUATION]]m1/2) is achieved in hot pressed SN21 with a relatively high texture degree (fL=0.213). © 2023, The Authors. All rights reserved.

关键词： Ductile fracture

Hybrid architecture design enhances the areal capacity and cycling life of low-overpotential nanoarray oxygen electrode for lithium–oxygen batteries

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Journal of Energy Chemistry 2020年第7期29卷 248-255,I0008页

作者： Liang Xiao Duo Wang Ming Li Bohua Deng Jinping Liu School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070HubeiChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina

Transition metal oxide(TMO)nanoarrays are promising architecture designs for self-supporting oxygen electrodes to achieve high catalytic activities in lithium-oxygen(Li-O2)***,the poor conductive nature of TMOs and the confined growth of nanostructures on the limited surfaces of electrode substrates result in the low areal capacities of TMO nanoarray electrodes,which seriously deteriorates the intrinsically high energy densities of Li-O2 ***,we propose a hybrid nanoarray architecture design that integrates the high electronic conductivity of carbon nanoflakes(CNFs)and the high catalytic activity of Co3 O4 nanosheets on carbon cloth(CC).Due to the synergistic effect of two differently featured components,the hybrid nanoarrays(Co3 O4-CNF@CC)achieve a high reversible capacity of3.14 mA h cm-2 that cannot be achieved by only single ***,CNFs grown on CC induce the three-dimensionally distributed growth of ultrafine Co3 O4 nanosheets to enable the efficient utilization of ***,with the high catalytic efficiency,hybrid Co3 O4-CNF@CC also achieves a more prolonged cycling life than pristine TMO *** present work provides a new strategy for improving the performance of nanoarray oxygen electrodes via the hybrid architecture design that integrates the intrinsic properties of each component and induces the three-dimensional distribution of catalysts.

关键词： Hybrid architecture Nanoarray oxygen electrode Synergistic effect Three-dimensional current collector Lithium-oxygen batteries

First-principles study of the Pr-doped bilayer nickelate La3Ni2O7

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Physical Review B 2025年第19期111卷 195118-195118页

作者： Zihao Huo Peng Zhang Haoliang Shi Xiaochun Yan Defang Duan Tian Cui Key Laboratory of Material Simulation Methods and Software of Ministry of Education State Key Laboratory of Superhard Materials College of Physics Jilin University Changchun 130012 China MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics School of Physics Xi'an Jiaotong University Xi'an 710049 China Institute of High Pressure Physics School of Physical Science and Technology Ningbo University Ningbo 315211 China

Recently, the Pr-doped Ruddlesden-Popper (RP) phase of bilayer nickelate La3Ni2O7 has been reported to exhibit a superconducting transition temperature (Tc) of 82.5 K and a superconducting volume fraction of about 57% at high pressure. However, the effect of Pr doping on La3Ni2O7 remains unclear. Here, we studied the crystal structures and electronic properties of Pr-doped La3Ni2O7 at 0 and 15 GPa based on the first-principles calculations to explore the doping effect of Pr. Our findings indicate that the praseodymium atoms prefer to occupy the outer La-O layers site. We then investigated the evolution of crystal structures in both the ambient pressure phase and the high-pressure phase of La3Ni2O7 as a function of doping concentration, revealing inconsistent trends in their evolution with increasing doping levels. Finally, by fitting the bilayer two-orbital model, we propose that doping Pr may reduce the required pressure for the superconductivity of La3Ni2O7. These results not only can help the further experimental search of RP phase nickelate at lower pressure, but also provide a helpful guide for understanding the effect of chemical pressure in an isovalent-doped RP phase nickelate superconductor.

关键词： Crystal atomic structure

Corrosion Behavior of Fexcrmnalcu High-Entropy Alloy in 0.5 M H2so4 Solution

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SSRN 2024年

作者： Cui, Junpeng Feng, Li Ma, Chao Wang, Zhaoqing Zhao, Yanchun School of Material Science and Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China Key Laboratory of Solar Power System Gansu Jiuquan Vocational and Technical College Jiuquan735000 China

High-entropy alloys (HEAs) FexCrMnAlCu (x=0, 0.5, 1.0, 1.5, 2.0) were prepared using vacuum arc melting. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses revealed that FexCrMnAlCu exhibits typical FCC and BCC structures. The BCC phase mainly consists of Cr, Mn, and Fe-rich dendritic (DR) structures, while the FCC phase is characterized by Cu-rich interdendritic (IR) structures. The addition of Fe did not alter the phase structure of the CrMnAlCu HEA, but it promoted the growth of the BCC phase while inhibiting the formation of the FCC phase. Immersion corrosion experiments and electrochemical tests showed varying corrosion behaviors among the alloys. The Fe0 alloy primarily exhibited corrosion in the interdendritic regions. The Fe0.5 alloy displayed interface corrosion between dendritic and interdendritic regions. The Fe1.0 alloy showed a coexistence of dendritic corrosion and interface corrosion. Both Fe1.5 and Fe2.0 alloys experienced severe selective corrosion of dendritic structures. This selective corrosion is attributed to the formation of the L12 phase within the dendritic structures, which, in conjunction with the BCC phase, resulted in galvanic corrosion. This phenomenon exacerbated the corrosion of dendritic structures in the FexCrMnAlCu HEAs. © 2024, The Authors. All rights reserved.

关键词： Corrosion resistance

Design and Strengthening Mechanism of Silver-Carbon Synergistic Reinforced Al Matrix Composites

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SSRN 2023年

作者： Li, Junguo Yang, Xuebin Li, Peibo Zhang, Yang Luo, Guoqiang Shen, Qiang Sun, Yi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China Hubei Longzhong Laboratory Hubei Xiangyang441000 China

Owing to inadequate interface contact between carbon and aluminum, enhancing the Al/C interface is crucial for the fabrication of high-performance Al matrix composites. This study selected polyvinyl butyral (PVB) with excellent dispersion properties as the carbon source. Simultaneously introducing silver to achieve synergistic reinforcement between silver and carbon in Al matrix composites, offering a novel reinforcement approach for Al matrix composites. The Al-16Ag-C composite is fabricated through the in-situ pyrolysis of PVB followed by hot pressing sintering. Subsequently, the effect of temperature on the microstructural evolution and mechanical properties of the composite is investigated. Microstructural characterization demonstrates the formation of two alloy phases, namely Ag2Al and Al4C3, within the Al-16Ag-C composite. The alloy phases, distributed at the grain boundaries, enhance the material’s strength by impeding dislocation motion, increasing dislocation density within the matrix, and limiting grain growth. The Al-16Ag-C composite, sintered at 630 °C, exhibits a remarkable ultimate tensile strength of 481 MPa and an elongation of 22.25%, representing a significant enhancement compared to pure Al. © 2023, The Authors. All rights reserved.

关键词： Polyvinyl butyral

Metal Alkoxides: A New Type of Reversible Anode materials for Stable and High-Rate Lithium-Ion Batteries

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SSRN 2024年

作者： Huang, Shaozhuan Deng, Chengjiang Ma, Liuyuan Liu, Jiayan Han, Xiaoyan Zhang, Qing Jin, Jun Li, Yu Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education Hubei Key Laboratory of Catalysis and Materials Science South-Central Minzu University Wuhan430074 China Faculty of Materials Science and Chemistry China University of Geosciences Wuhan430074 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Metal-organic compounds have attracted significant attention for lithium-ion battery (LIB) anodes. However, their practical application is severely hindered by the poor structure stability and sluggish Li+ reaction kinetics. Here, we proposed a new type of metal-organic compound, metal alkoxides, for high-performance LIBs. A series of metal-alkoxide/graphene composites with different transition metal centers and alkoxide anions are prepared to investigate the structural stability, Li-storage ability, and Li+ diffusion kinetics. The results reveal that the metal centers and alkoxide anions have significant influence on the structural stability, molecular weight, and electronic structures, which are highly related to the Li-storage performance. Among them, Co-EG/rGO (EG represents the ethylene glycol anion) delivers the best performance involving high specific capacity (975 mAh g-1 at 0.2 A g-1), excellent rate capability (400.8 mAh g-1 at 10 A g-1), and stable cycling performance (86.8% capacity retention after 600 cycles) due to its stable structure, smaller molecular weight, and favorable electronic structure. Moreover, the Li-storage mechanism and solid electrolyte interphase (SEI) evolution of the Co-EG/rGO electrode are studied in detail through multiple ex-situ/in-situ characterizations. This work provides a new type of metal alkoxide anode material for high-rate and long-life LIBs toward practical energy applications. © 2024, The Authors. All rights reserved.

关键词： Lithium-ion batteries

Creep deformation and microstructure evolution of Ni-based superalloy GH3128 for VHTR applications

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Journal of Alloys and Compounds 2025年 1029卷

作者： Wang, Yue Yeli, Guma Yang, Hui Chen, Xiaotong Zhao, Hongsheng Shi, Li Li, Kejian Wang, Haitao Cai, Zhipeng Li, Caixia Huang, Jin Institute of Nuclear and New Energy Technology Tsinghua University Beijing100084 China Department of Mechanical Engineering Tsinghua University Beijing100084 China Key Laboratory for Advanced Materials Processing Technology Ministry of Education Beijing100084 China State Key Laboratory of Tribology in Advanced Equipment Tsinghua University Beijing100084 China Collaborative Innovation Center of Advanced Nuclear Energy Technology Tsinghua University Beijing100084 China Gaona Aero Material Co. Ltd. Beijing100081 China

Creep behaviors and microstructure of Ni-based superalloy GH3128 were investigated based on creep tests under 9 different temperature-stress combinations. The underlying deformation mechanisms were discussed through analysis of stress exponents and microstructure evolution. The results indicated that after creep rupture at 850 °C, the microstructure of GH3128 featured significant precipitate formation, high-density dislocation pile-ups, and extensive dynamic recrystallization. Creep deformation was dominated by multiple mechanisms including dislocation climbing, dislocation-precipitate interactions, and grain boundary sliding, corresponding to a high stress-exponent of 8.5. As the testing temperature increased to 950 °C and 1000 °C, the density of precipitates decreased with growth in size. It was accompanied by reduced dislocation density and increased recrystallized grain size. Dislocation climbing controlled creep deformation, in which the stress exponents were respectively 6.1 and 5.5. © 2025 Elsevier B.V.

关键词： Creep