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On-Surface Conversion Reaction Realizes advanced Red Phosphorus/Carbon Anode for High-Performance Lithium-Ion Batteries

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SSRN 2024年

作者： Huang, Yujie Li, Hao Wu, Mengjun Tian, Tian Wang, Rui Zeng, Sixiu Song, Jiangping Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China Hubei Key Laboratory of Fuel Cells Wuhan University of Technology Wuhan430070 China

Red phosphorus (RP), the one of the most prospective anodes in lithium-ion batteries (LIBs), has been severely limited due to the intrinsic defects of massive volume expansion and low electronic conductivity. The vaporization-condensation-conversion (VCC), which confines RP nanoparticles into carbon host, is the most widely used method to address the above drawbacks and prepare RP/C nanostructured composites. However, the volume effect-dominated RP caused by the inevitably deposition of RP vapor on the surface of carbon material suffers from the massive volume change and unstable solid electrolyte interface (SEI) film. Herein, we propose a simple interfacial modification method to eliminate the superficial RP and yield stable surface composed of ion-conducting Li3PS4 solid electrolyte, endowing RP/AC composites excellent cycling performance and ultrafast reaction kinetics. Therefore, the RP/AC@S composites exhibit 926 mAh g−1 after 320 cycles at 0.2 A g−1 (running over 181 days), with 81.6% capacity retention and a corresponding capacity decay rate of as low as 0.059%. When coupled with LiFePO4 cathode, the full cells present superior cycling performance (62.1 mAh g−1 after 500 cycles at 1 A g−1) and excellent rate capability (81.1 mAh g−1 at 1.0 A g−1). © 2024, The Authors. All rights reserved.

关键词： Lithium compounds

Significant capacitance enhancement induced by cyclic voltammetry in pine needle-like Ni-Co-Cu multicomponent electrode

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Journal of materials Science & technology 2021年第19期78卷 100-109页

作者： Liqianyun Xu Liuyang Zhang Bei Cheng Jiaguo Yu Ahmed A.Al-Ghamdi S.Wageh State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou.450001China Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia

Poor conductivity and rate capability are the obstacles faced by nickel-cobalt composites as electrode materials for supercapacitor ***,simple electrochemical treatment conducted by cyclic voltammetry is applied and the overall performance of the active material is considerably *** discover that this treatment triggers the formation of Ni-Co-Cu ternary composite and optimizes the crystal structure of the untreated *** areal capacitance of the treated sample rockets up to 6.13 F cm^(-2)at 2 m A cm^(-2),almost 13 times higher than the untreated ***,the resistance is substantially reduced by cyclic voltammetry ***,the Coulombic efficiency and stability are concurrently *** reasons behind this treatment are mulled over and reasonable hypothesis is *** study provides a cheap and effortless way to reform the structures of as-obtained samples as well as vigorously raise the performance of current available materials.

关键词： Cyclic voltammetry Ni-Co-Cu ternary composite Ion exchange Supercapacitor

Ultrahigh Yield Strength Heterostructured Titanium Matrix Composites by Controlling Α Variant Selection

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SSRN 2023年

作者： Zhu, Ke Huang, Jin Nie, Wei Liu, Ruxia Xiao, Yong Zhang, Jian Luo, Guoqiang Shen, Qiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Institute for Carbon Neutrality University of Science and Technology Beijing Beijing100083 China School of Material Science and Engineering

Enhancing the strength and plasticity of materials in a synergistic manner is a longstanding challenge in materials science. The content of β-stabilizing element W in Ti alloys is controlled using a chemical boundary engineering (CBE) strategy. Heterostructured Ti-xW composites are designed with α grain boundaries as the outer shell, α/β lamellar organization as the intermediate transition layer, and acicular martensite as the core region. This material exhibits a remarkable compressive yield strength of 2100 MPa, surpassing the majority of reported titanium matrix composites. The exceptional strength primarily arises from the precipitation strengthening of α/β lamellar organization and acicular martensite in the core region. Additionally, the gradient structure resulting from varying concentrations of W elements contributes to hetero-deformation induced (HDI) strengthening. This study holds significant implications for the development and design of high-strength heterostructured titanium matrix composites. © 2023, The Authors. All rights reserved.

关键词： Martensitic transformations

Spherical Fe3o4 Morphology Modulation for Enhancing Infrared Emissivity and Radiant Heat Dissipation

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SSRN 2024年

作者： Qi, Xiaoting Liu, Mingrui Zhu, Wanting Wei, Zhijie Liang, Yu Sun, Chuanqing Bao, Chenxi Zhao, Wenyu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National energy key laboratory for new hydrogen-ammonia energy technologies Foshan Xian hu Laboratory Guangdong Foshan528200 China

Radiant heat dissipation has emerged as a critical technique for effective thermal management, offering energy efficiency, cost-effectiveness, and adaptability to various shapes while promoting environmental sustainability. However, the intricate relationship between material structures and emissivity remains inadequately understood. This study primarily utilizes a straightforward and economical solvothermal method to regulate the synthesis of Fe3O4 ferrite, exploring its structural relationship with infrared radiation performance. By adjusting the solvent ratio of ethylene glycol and diethylene glycol in the solvothermal system, we successfully synthesized uniformly dispersed Fe3O4 nanospheres ranging from 10 to 800 nm. Notably, our research revealed a positive correlation between infrared emissivity and the particle size. Submicron hollow spheres with a size of 800 nm exhibit an exceptionally high emissivity of 0.992 within the 8~13 μm wavelength range. Morphological and size variations induced alterations in lattice strain, oxygen vacancies, and phonon lifetimes, which consequently influencing the lattice vibration absorption and infrared emissivity. Moreover, the device surface with a composite coating formed by combining 15wt% Fe3O4 particles with organic matter, achieves a temperature difference of 17.6 °C under a 4 W input power condition compared to blank device. This finding contributes to further revealing the process of material radiative heat dissipation, driving the application of high-emissivity materials for heat dissipation in high-power electronic devices. © 2024, The Authors. All rights reserved.

关键词： Magnetite

Tellurium intervened Fe-N codoped carbon for improved oxygen reduction reaction and high-performance Zn-air batteries

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Journal of materials Science & technology 2023年第6期137卷 215-222页

作者： Rui Wang Zihan Meng Xuemin Yan Tian Tian Ming Lei Rami Adel Pashameah Hala MAbo-Dief Hassan Algadi Nina Huang Zhanhu Guo Haolin Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China College of Chemistry and Environmental Engineering Yangtze UniversityJingzhou 434023China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China Department of Chemistry Faculty of Applied ScienceUmm Al-Qura UniversityMakkah 24230Saudi Arabia Department of Science and Technology University College-RanyahTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Electrical Engineering Faculty of EngineeringNajran UniversityP.O.Box 1988Najran 11001Saudi Arabia College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Department of Chemical and Bimolecular Engineering Integrated Composites Laboratory(ICL)University of TennesseeKnoxvilleTN 37996USA Guangdong Hydrogen Energy Institute of WHUT Xianhu Hydrogen ValleyFoshan 528200China

Pyrolysis-acquired iron and nitrogen codoped carbon(Fe-N-C)has been comprehensively investigated for its promising oxygen reduction reaction(ORR)catalytic performance and structural *** modification of non-metal elements with larger atomic radius and the corresponding intrinsic microstructure-property relations are rarely *** this study,tellurium(Te)intervened Fe-N-C was prepared by micelles-induced polymerization with Te nanowires as an in-situ intervening *** out-plane bonding of Te with Fe induced the increase of both N content and proportion of pyridinic N on the material surface,thus improving the ORR catalytic *** assembled Zn-air battery demonstrated a maximum power density of 250 mW/cm^(2)and excellent rate capability under various discharge current densities,which was much better than the Pt/***,the current work demonstrates a novel Te/Fe-N-C material and reveals an original Te intervened Fe-N-C strategy and N reconfiguration mechanism,which is of great significance for the design of key materials in energy-related fields.

关键词： Te/Fe-N-C Assembly ORR Electrocatalysis Zn-air battery

Magnetic Units-Ordered Architectonics Triggering Excellent Electric-Thermal Conversion Performance of Thick Films

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SSRN 2024年

作者： Zhang, Haojun Ke, Shaoqiu Kuang, Ziyao Li, Haotian Chen, Tiantian Nie, Xiaolei Zhu, Wanting Wei, Ping He, Danqi Liu, Mingrui Zhao, Wenyu Zhang, Qingjie State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Nanostructure research center Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu 528000 China

The low electrical transport performance of flexible thermoelectric (TE) films is the bottleneck that restricts the development of in-plane heat dissipation technology based on Peltier effect. The architectonics of magnetic materials into TE materials has been proven to be an effective method to improve the efficiency of TE conversion. In this study, a series of Bi0.5Sb1.5Te3 (BST)/Fe-NPs/BST thermo-electromagnetic (TEM) films were successfully prepared by orderly embedding ferromagnetic Fe nanoparticles (Fe-NPs) with different distribution shapes in BST matrix through screen-printing combined with hot-press curing. The study focuses on the influence of the ferromagnetism of Fe-NPs and Fe3O4-NPs -induced thermo-electromagnetic coupling on the microstructure and electro-thermal transport properties of BST. The results reveal a 36.5% enhancement in the maximum power factor (PF) of TEM films structured with Fe-NPs in a rhombic dot matrix sequence, while the applied Fe-NPs has no impact on the thermal conductivity, which remains at 0.94 Wm-1K-1 at room temperature, and the calculated zT value is 0.87 under the room temperature. The single-arm device prepared based on TEM thick films can achieve a cooling effect at 1.8 K, and the design of the in-plane heat dissipation device can realize a cooling efficiency in the cooling region reaching 2.8 K. In this paper, the effect of magnetic order on the electrical transport properties of BST thick films is explained from the point of view of the physical model for the first time. © 2024, The Authors. All rights reserved.

关键词： Thermal conductivity

Microstructure and mechanical properties of extruded Mg-Sn alloys with a heterogeneous grain structure

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Journal of Magnesium and Alloys 2024年

作者： Tong, Lin Jiang, Jing Bi, Guangli Li, Yuandong Chen, Tijun Zhang, Xiaoru Fang, Daqing State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China School of Material Science and Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an710049 China

The high-strength Mg-7Sn alloys (wt.%) with a heterogeneous grain structure were prepared by low-temperature extrusion (230 °C) with the extrusion ratio of 9:1 (9E230) and 17:1 (17E230). The two extruded alloys contained fine dynamic recrystallization (DRX) grains (FG) and coarse unDRX grains (CG). The difference in deformability between CG and FG leads to the formation of heterogeneous grain structure. The average grain size and basal texture intensities increased while the volume fraction of CG decreased with increasing extrusion ratio. Tensile testing results indicated that the extruded 17E230 alloy exhibited higher tensile strengths than 9E230 alloy, whose tensile yield strength (σ0.2), ultimate tensile strengths (σb), and elongation to failure (Εf) were 231.1 MPa, 319.5MPa, and 12.54 % respectively. The high tensile strengths of the extruded alloy mainly originated from grain refinement, texture strengthening, precipitation strengthening from a great number of nano-scale Mg2Sn phases, solid solution strengthening and hetero-deformation induced (HDI) strengthening, while the good ductility of the alloy was also mainly attributed to grain refinement, activation of the non-basal slip systems and HDI hardening. © 2024

关键词： Tensile strength

Achieving High-Strength Porous Tungsten with Wide Porosity Range Via Selective Dissolution W-Ti-Fe Precursor

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SSRN 2024年

作者： Jia, Hao Zhang, Jian Ge, Shuai Zhu, Bing Liu, Ruxia Wu, Dongshuang Luo, Guoqiang Shen, Qiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Nanyang Technological University Singapore639798 Singapore

Porous tungsten with wide porosity variation is considered a candidate for high-energy X-ray flash radiography. This work combines tape casting and dealloying to selectively dissolve a W-Ti-Fe precursor, achieving high-strength porous tungsten with a wide porosity range. The PVB exists on the surface of particles in the form of an amorphous carbon film after pyrolysis, providing conditions for the W-Fe-C interface reaction. The porosity of porous tungsten is 50.7~80.4%. The compressive strengths of porous tungsten with porosity of 50.7% and 80.4% are 221.9 MPa and 10.6 MPa, respectively. The dissolution of the Ti located in the ligament can enhance the porosity of porous tungsten. The coating composed of the solid solution formed at the interface of W and Ti during heat treatment and Fe3W3C can enhance the ligament strength. This work provides a theoretical reference for preparing porous tungsten with a wide porosity range and high performance. © 2024, The Authors. All rights reserved.

关键词： Dissolution

Awakening the oxygen evolution activity of MoS_(2) by oxophilic-metal induced surface reorganization engineering

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Journal of Energy Chemistry 2021年第11期30卷 546-551,I0013页

作者： Xueqin Mu Yang Zhu Xiangyao Gu Shipeng Dai Qixin Mao Lintao Bao Wenxuan Li Suli Liu Jianchun Bao Shichun Mu Jiangsu Key Laboratory of Biofunctional Materials School of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023JiangsuChina Key Laboratory of Advanced Functional Materials of Nanjing Nanjing Xiaozhuang UniversityNanjing 211171JiangsuChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen ValleyFoshan 528200GuangdongChina

Although molybdenum disulfide (MoS_(2))-based materials are generally known as active electrocatalysts for the hydrogen evolution reaction (HER), the inert performance for the oxygen evolution reaction (OER) seriously limits their wide applications in alkaline electrolyzers due to there exists too strong metal-sulfur (M−S) bond in MoS_(2). Herein, by means of surface reorganization engineering of bimetal Al, Co-doped MoS_(2) (devoted as AlCo_(3)-MoS_(2)) through in situ substituting partial oxidation, we successfully significantly activate the OER activity of MoS_(2), which affords a considerably low overpotential of 323 mV at −30 mA cm^(−2), far lower than those of MoS_(2), Al-MoS_(2) and Co-MoS_(2) catalysts. Essentially, the AlCo_(3)-MoS_(2) substrate produces lots of M−O (M=Al, Co and Mo) species with oxygen vacancies, which trigger the surface self-reconstruction of pre-catalysts and simultaneously boost the electrocatalytic OER activity. Moreover, benefiting from the moderate M−O species formed on the surface, the redistribution of surface electron states is induced, thus optimizing the adsorption of OH* and OOH* intermediates on metal oxyhydroxides and awakening the OER activity of MoS_(2).

关键词： Surface reorganization engineering Porous nanosheets Oxygen evolution reaction MoS_(2) Oxophilic-metal