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SSRN 2023年

作者： Duan, Changyu Zhong, Jialing Hu, Shenghan Dou, Yichen Lu, Jianfeng Cheng, Yi-Bing Ku, Zhiliang State Key Laboratory of Advanced Technologies for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan430070 China

The precise control and understanding of crystal orientation in perovskite polycrystalline films are crucial for the development of efficient and stable devices. However, achieving this control remains a significant challenge. Herein, we have developed a PbI2 oriented growth strategy, combining with in-situ vapor-solid reaction transformations, to achieve oriented growth of full-vacuum perovskite films. GIWAXS analysis revealed the general pattern of PbI2 oriented vapor growth and in-situ vapor-solid reaction transformation in this two-step process. The resulting preferred orientation has effectively reduced trap states density, optimizing the carrier dynamics. As a result, champion efficiencies of 22.11% (0.148 cm2), 20.60% (1 cm2) and 19.41% (5 × 5 cm2 mini-modules) are achieved, which are the highest value for perovskite based on vapor-solid reaction. Additionally, the oriented growth method is applicable to a variety of guide layers and is extended to 30 × 30 cm2 film, demonstrating the universality and scalability of the method. © 2023, The Authors. All rights reserved.

关键词： Perovskite solar cells

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Boosting Ion Conduction and Moisture Stability Through Zn2+ Substitution of Chloride Electrolytes for All-Solid-state Lithium Batteries

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advanced Energy materials 2025年第0期

作者： Lei, Peng Wu, Gang Liu, Hong Qi, Xiang Wu, Meng Li, Dabing Li, Yang Gao, Lei Nan, Ce-Wen Fan, Li-Zhen Beijing Key Laboratory for Advanced Energy Materials and Technologies Institute of Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China

The recently emerged chloride solid electrolytes have garnered significant attention due to their superior ionic conductivity, wide electrochemical stability window, and exceptional compatibility with high-voltage oxide cathodes. Nevertheless, the currently cost-effective Zr-based chloride solid electrolytes face significant challenges, including low ionic conductivity and poor moisture stability. Herein, a versatile Zn2+-doped Zr-based chloride electrolyte is presented, designed to meet the aforementioned requirements. The optimized Li2.4Zr0.8Zn0.2Cl6 exhibits an improved ionic conductivity of 1.13 mS cm−1 at 30 °C. Simultaneously, the Li2.4Zr0.8Zn0.2Cl6 also demonstrates impressive moisture stability, maintaining its structural integrity after exposure to humid air. The mechanism underlying the enhanced moisture stability of Li2.4Zr0.8Zn0.2Cl6 is further elucidated by density functional theory calculations. Most notably, whether coupled with LiCoO2 or LiNi0.8Mn0.1Co0.1O2 cathodes, Li2.4Zr0.8Zn0.2Cl6-based all-solid-state batteries demonstrate exceptional cycling stability and rate performance. This high ionic conduction and moisture-resistant chloride electrolyte holds great promise for significantly advancing the commercialization of all-solid-state lithium batteries. © 2025 Wiley-VCH GmbH.

关键词： Solid-state Batteries

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Equivalent Static Design Load for Helicopter Landing Deck 34th

Equivalent Static Design Load for Helicopter Landing Deck

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34th International Ocean and Polar Engineering Conference, ISOPE 2024

作者： Guo, Zhihan Zhu, Ling Cai, Wei Dai, Shaoling Ministry of Education Wuhan China School of Naval Architecture Ocean and Energy Power Engineering Wuhan University of Technology Wuhan China State Key Laboratory of Materials Synthesis and Processing Wuhan University of Technology Wuhan China Weihai Huanghai Shipbuilding Co. Ltd. Weihai China

ISBN: (纸本)9781880653784

In the context of helicopter landings on decks of ship and offshore platform under extreme sea conditions, the design of deck structures often involves the using of a dynamic effect factor, which is multiplied by the weight of aircraft to serve as an equivalent static load applied on the deck. The determination of the dynamic effect factor is a critical concern for designers. This paper uses structural permanent deformation as the criterion, to develop a new method to determine the equivalent static force for dynamic wheel load. The research findings presented in this study provide valuable insights for the design of ship structures under dynamic wheel load. © 2024 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Offshore oil well production

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Effect of Rare Earth Element Yttrium on Microstructure and Properties of Plasma Arc Welding Joints of Inconel 625 Superalloy

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Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal materials and Engineering 2025年第5期54卷 1283-1290页

作者： Zhang, Zhongke Ji, Baocheng Chen, Rongyao Liu, Lina School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou730050 China

Plasma welding technique was used to weld the nickel based superalloy Inconel 625 plate (100 mm×50 mm×4 mm) with yttrium (Y) metal powder. The samples were characterized by OM, SEM and mechanical properties test. The results show that the joint formation is optimal when the welding current is 95 A, the welding speed is 110 mm/min, the plasma gas flow is 3 L/min and the content of yttrium element is 0.3wt%. The microstructure of the weld zone is fine equiaxed crystal, and the finer and more uniform grains appear in the heat affected zone after adding yttrium element. A large amount of Laves phase, carbide phase (MC) and yttrium-rich phase (Y-riched) are precipitated in welded joints. With the increase in yttrium content, the tensile strength, yield strength and elongation of the joint increase first and then decrease. When the yttrium content is 0.3wt%, the tensile strength of the sample is the highest of 776.59 MPa, the yield strength is the highest of 595.68 MPa, and the elongation is the highest of 46.60%. The overall property of the sample is higher than that without adding rare earth. Both tensile and impact fractures are ductile fractures. When the yttrium content is 0%, the hardness of weld zone is the highest, and the hardness of weld zone decreases significantly after the addition of yttrium element. © 2025 Science Press. All rights reserved.

关键词： Tensile strength

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Microstructure and mechanical properties of B 4 C–TiB 2 –SiC-BN composites fabricated by in-situ reaction spark plasma sintering

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Journal of materials Research and technology 2025年 37卷 389-396页

作者： Zeping Wang Wen Zhang Jinyong Zhang Lin Ren Fan Zhang Weimin Wang Zhengyi Fu Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang 441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Progressing. Wuhan University of Technology Wuhan 430070 China

B 4 C-TiB 2 -SiC-BN composites are fabricated by employing B 4 C, Si 3 N 4 , and TiC as raw powders via in-situ reaction spark plasma sintering. The densification behavior, microstructure, and mechanical properties of composites with different additive amounts of (Si 3 N 4 +TiC) are investigated. It is confirmed that the in-situ reaction during the sintering procedure of the composites effectively promotes the densification process. Toughening mechanisms including crack deflection, crack branching, crack bridging coupled with BN pull-out lead to the improvement of flexural strength and fracture toughness. As a result, the composites exhibit optimal performance when 15 wt% (Si 3 N 4 +TiC) are added, with the bulk density, flexural strength, fracture toughness and Vickers hardness of 2.59 g/cm 3 , 705 MPa, 4.4 MPa m 1/2 , and 27.8 GPa, respectively. This provides a novel route to preserve the lightweight characteristics and simultaneously enhance the mechanical performance of B 4 C-based composites.

关键词： B 4 C-TiB 2 -SiC-BN composites In-situ reaction Toughening mechanisms Mechanical properties

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Solid-state stepwise temperature-programmable synthesis of bioinspired Fe-N-C oxygen reduction electrocatalyst featuring Fe-N_(5)configuration

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Nano Research 2025年第3期18卷 654-665页

作者： Wei Sang Somboon Chaemchuen Longyang Zhang Zechen Wang Xingchuan Li Cocoro Andrew Nagasaka Mo Xiong Naoki Ogiwara Cheng Chen Zhao Wang Jian Zhang Francis Verpoort Shichun Mu Zongkui Kou Tingting Wang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Basic Science School of Arts and SciencesThe University of TokyoKomabaMeguro-kuTokyo 153-8902Japan MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiao tong UniversityXi’an 710049China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000China Department of Chemical Engineering Faculty of EngineeringMahidol UniversityNakhon Pathom 73170Thailand School of Mathematical&Physical Sciences Wuhan Textile UniversityWuhan 430200China Joint Institute of Chemical Research(FFMiEN) Peoples Friendship University of Russia(RUDN University)6 Miklukho-Maklaya Str.117198 MoscowRussia National Research Tomsk Polytechnic University Lenin Avenue 30634050 TomskRussia Hubei Key Laboratory of Ferro &Piezo-electric Materials and DevicesFaculty of Physics and Electronic SciencesHubei UniversityWuhan 430062China School of Chemistry and Chemical Engineering Hainan UniversityHaikou 57022China

The bioinspired Fe-N-C features an asymmetric Fe-N_(5)configuration to produce active metal-oxygen intermediates by introducing axial N ligand into a symmetric Fe-N_(4) structure,enabling highly active oxygen reduction reaction(ORR).However,the artificial creation of active Fe-N_(5)configuration with a direct,facile and green method has been rarely developed yet,as current techniques involve complex processes and costly ***,we advance a novel solid-state stepwise temperature-programmable(SST)route to directly produce bioinspired Fe-N_(5)-*** then demonstrate that such a Fe-N_(5)-C exhibits a quite higher half-wave potential(0.92 V)with 22-fold faster ORR kinetics(15.6 mA·cm^(−2)@0.85 V)over that of the commercial Pt/C ***,we perform density functional theory(DFT)to find that the Fe is discharged with an extra 0.1 e^(−)through the axially coordinate N ligand,which significantly enhances the ability to activate O_(2) and enables an easier desorption of the crucial intermediate ^(*)OH on the Fe-N_(5)configuration over the conventional Fe-N_(4) structure.

关键词： single atom catalysts Fe-N_(5)coordination solvent-free synthesis oxygen reduction reaction(ORR) metal-air battery

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Nonsolvent-Induced Electrospun Fibers with Crater-Like Surface and High-Loading Polytriphenylamine-Derived as a Flexible Cathode for Lithium-Ion Batteries

SSRN

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SSRN 2023年

作者： Xiong, Yufeng Li, Yingjiang Hu, Zhengfei Sun, Zhengquan Cheng, Yiliang Zhang, Yang Dong, Lijie Center for Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

Fabricating electrodes simultaneously possessing remarkable flexibility, excellent mechanical properties, and high energy density remains a significant challenge in flexible lithium-ion batteries (LIBs). Herein, a series of flexible organic composite films were prepared with high-loading polytriphenylamine (PTPA) and the derivatives (PTPA-PO) as active material, along with carbon nanotubes (CNTs) serving as conductive filler. The fabrication employed the polyethylene oxide (PEO) assisted nonsolvent (or poor solvent) induced phase separation electrospinning (NIPSE) method. Subsequently, the fiber morphology and electrochemical applications of the flexible organic composite films were systematically studied. Notably, the 60% PTPA-PO/20% CNTs/PEO flexible electrode with a high-loading active material of 60 wt% exhibits a significant discharge capacity of 146.6 mAh·g-1 and a favorable discharge platform ~ 3.7 V vs. Li. Furthermore, the inherent flexibility of electrode contributes to efficient and stable transport of ions and electrons, resulting in a fine capacity retention of 93.3% after 100 cycles. The improvement of electrochemical performance can be rationalized by the unique internal conductive network and crater-like surface structure of the fibers formed through the NIPSE method. This work provides an efficient method to fundamentally improve the energy storage performance and flexibility of LIBs. © 2023, The Authors. All rights reserved.

关键词： Electrospinning

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界面工程实现Au@MoS_(2)核壳异质结在等离激元学和光电子学领域卓越的热载流子输运动力学

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Science China materials 2023年第10期66卷 3931-3940页

作者：刘然朱翔宇刘盛洪欧阳德才马小茜夏芳芳余一梦张悍吴劲松刘世元梁文锡李渊翟天佑 State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Nanostructure Research CenterWuhan University of TechnologyWuhan 430070China School of Engineering and Materials Science Queen Mary University of LondonMile End RoadLondonE14NSUK State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518057China

贵金属和二维半导体构建的异质结为等离激元纳米结构产生的热载流子提供了独特的电荷传输路径,有望应用于各种等离激元和光电子器件.然而,传统异质结构的电荷转移速度和效率通常受限于有限的界面面积和不可避免的界面污染.本文中,具有... 详细信息

贵金属和二维半导体构建的异质结为等离激元纳米结构产生的热载流子提供了独特的电荷传输路径,有望应用于各种等离激元和光电子器件.然而,传统异质结构的电荷转移速度和效率通常受限于有限的界面面积和不可避免的界面污染.本文中,具有原子级清洁和较大接触界面的新型Au@MoS_(2)核壳异质结构能够实现超快和高效的热电子转移.飞秒瞬态吸收光谱研究表明,Au@MoS_(2)中从金纳米颗粒到MoS_(2)的热电子注入时间常数小于244 fs,而机械转移方法制备的Au/MoS_(2)对照样品的热电子注入时间常数为493 fs,同时,电荷转移效率从Au/MoS_(2)的3.33%提升至Au@MoS_(2)的25.3%.开尔文探针力显微镜和离散偶极近似研究进一步证明了上述结果,明显改善的电荷转移归因于原子级清洁和完全封装的异质结界面.这项研究提供了贵金属-二维半导体异质结构内固有电荷转移的基本理解,从而展现了Au@MoS_(2)这一新型异质结结构在等离激元和光电子器件中的应用前景.

关键词： 2D materials MoS_(2) heterostructures optoelectronics plasmonics

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Deformation mechanisms in aβ-quenched Ti-5321 alloy:In-situ investigation related to slip activity,orientation evolution and stress induced martensite

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Journal of materials Science & technology 2022年第17期112卷 36-48页

作者： Cong Wu Qinyang Zhao Shixing Huang Yongqing Zhao Lei Lei Junqiang Ren Qiaoyan Sun Lian Zhou State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXi’an 710049China School of Material Science and Engineering Chang'an UniversityXi’an 710064China Northwest Institute for Non-ferrous Metal Research Xi’an 710016China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China

The deformation behavior ofβ-quenched nearβTi-5321(Ti-5Al-3Mo-3V-2Cr-2Zr-1Nb-1Fe)alloy was systematically studied using in-situ tensile test monitored by the scanning electron microscopy(SEM).Besides,the electron backscatter diffraction(EBSD)was performed to thoroughly discuss the deformation *** results indicated that slip activities,crystal rotation and stress induced martensite transformation were the major deformation mechanisms in theβ-quenched Ti-5321 alloy during in-situ tensile *** slip activities were investigated by using the EBSD-trace analysis,which demonstrated that{110}<111>,{112}<111>and{123}<111>slip systems were activated and the{110}<111>slip system ***,βgrains rotated about 7.8°to accommodate the increased ***,the stress induced martensiteα″which was related to the double yielding behavior during tensile process exhibited multiple *** differentα″variants divided theβmatrix into smallerβblocks with a typical zigzag morphology,in which oneα″variant passed through another one by deflecting its initial growth ***,the deformation twinning in martensiteα″and slip bands cutting through martensiteα″effectively accommodated the local *** systematically analysis can provide insightful information about the deformation mechanisms in nearβtitanium alloys.

关键词： In-situ tensile test Slip activity Stress induced martensite Titanium alloys

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Enhanced Photovoltaic Performance and Stability of CsPbI3 Quantum Dots via Ligand Exchange and Compositional Defect Passivation

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ACS Applied Nano materials 2025年第23期8卷 12047-12056页

作者： Liu, Yueli Gao, Tonghuan Yang, Zifan Zhu, Huixin Chen, Keqiang Bao, Yunan Chen, Wen State Key Laboratory of Silicate Materials for Architectures School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China Faculty of Materials Science and Chemistry China University of Geosciences Wuhan 430074 China Wuhan Brilliant Tech Co. Ltd. Wuhan 430205 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China

Inorganic CsPbI3 perovskite quantum dots (PQDs) possess excellent optical properties, holding broad application prospects in the field of photovoltaics. However, the issues of a complex surface chemical environment and high compositional defect density for CsPbI3 PQDs have severely influenced the performance of CsPbI3 PQD solar cells (PQDSCs). Herein, the sequential treatment strategy based on the ligand exchange of trimethyliodosilane (TMIS) and the compositional defect regulation of formamidinium iodide (FAI) is introduced. Short-chain ligands of TMIS are used to replace the original ligands of CsPbI3 PQDs and robustly anchor to the PQD surface, which guarantees the high stability and efficient charge carrier transport of CsPbI3 PQDs. Furthermore, FAI is introduced by the vacancies and dangling bonds as the driving force on the PQD surface to passivate the defects of Cs and I vacancies while reducing the exciton binding energy and band gap of the CsPbI3 PQDs. Consequently, the power conversion efficiency of PQDSCs is achieved to be 15.07%, which is greatly enhanced compared with that of the control device (12.09%), and only 26% of the initial efficiency is lost after aging under ambient conditions (20-30% RH) for 14 days.

关键词： compositional defect regulation CsPbI3 quantum dot solar cells ligand exchange power conversion efficiency stability

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