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SSRN 2023年

作者： He, Zhanbing Zhang, Tiantian Zhao, Liangqun Ma, Haikun Huang, Shuzhao Shen, Ningning Hui, Xidong State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China Hebei Key Laboratory of Material Near-Net Forming Technology School of Materials Science and Engineering Hebei University of Science and Technology Shijiazhuang050018 China

Micro- or nano-tubular materials have important applications due to their unique structure, while tubular quasicrystal-related structures are rarely found. Here, oriented microtube arrays of high-entropy decagonal quasicrystal (HE-DQC) approximants were prepared in Al20Si20Mn20Fe20Ga20 alloy by simple melt spinning. Transmission electron microscopy revealed microtubes mostly composed of alternating arrangements of (1/0, 2/1) quasicrystal approximant domains (lattice constants a = 0.73 nm, b = 1.23 nm, and c = 2.24 nm) and defective (1/0, 2/1) domains. However, high heat treatment leads to changes in the microtube morphology and structure. By nanoindentation testing, microtubes show hardness of 10.9 GPa and elastic modulus of 189.3 GPa. We demonstrate that the microtubes formation is mainly related to the temperature gradient caused by rapid solidification, twinning growth of approximant domains, and also the insufficient supply of raw materials in the later stages of solidification. © 2023, The Authors. All rights reserved.

关键词： Entropy

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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

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A robust interface enabled by electrospun membrane with optimal resistance in lithium metal batteries

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Journal of Energy Chemistry 2021年第4期30卷 1-9页

作者： Chen Dong Zhenkang Lin Yuxin Yin Yaoxuan Qiao Wei Wang Qibing Wu Chengxiang Yang David Rooney Cheng Fan Kening Sun Beijing Key Laboratory for Chemical Power Source and Green Catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China State Key Laboratory of Advanced Chemical Power Sources Guizhou Meiling Power Sources Co.Ltd.Zunyi 563003GuizhouChina School of Chemistry and Chemical Engineering Queen’s University BelfastBelfast BT95AGUnited Kingdom

A uniform diffusion layer is essential for non-dendritic deposition of lithium in high-density lithium ***,natural pristine solid electrolyte interface(SEI)is always porous and inhomogeneous because of repeated breakdown and repair cycles,whereas ideal materials with excellent mechanical property for artificial SEIs remain a ***,a robust and stable interface is achieved by spinning soft polymer associated with few MoO_(3) into fibers,and thus mechanical property of fibers other than materials determines mechanical performance of the interface which can be optimized by adjusting ***,lithium deposited underneath the layer is enabled by constructing an optimal resistance to make the membrane serve as an artificial SEI rather than lithium *** a result,dendritefree lithium was observed underneath the membrane,and stable interface for long-term cycling was also indicated by EIS *** lithium iron phosphate(LiFePO_(4))full-cell with coated electrode demonstrated an initial capacity of 155.2 m Ah g^(-1),and 80%of its original capacity was retained after 500 cycles at 2.0℃ without any additive in carbonate-based electrolyte.

关键词： Lithium metal battery Dendrite-free Interfacial stability Uniform diffusion layer Deposition site

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Long Shelf Life, Intrinsically Flame Retardant, Transparent, High-Performance One-Component Epoxy Resin Based on Phosphorus-Containing Imidazole Derivatives

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SSRN 2023年

作者： Chai, Mingzhuo Liu, Li Zhang, Pengbo Huang, Yudong MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China

The one-component epoxy resin composed of latent phosphate-containing imidazole curing agent exhibits outstanding flame retardancy and thermal resistance. However, its shelf life needs to be further improved to reduce its storage cost. Besides, the transparency and mechanical properties of these cured products are also affected during the improvement of fire safety. Herein, two latent phosphorus-containing imidazole curing agents (PHI-HPP and EMI-HPP) were synthesized based on the acid-base neutralization effect and steric hindrance effect. Especially, the one-component epoxy resin with PHI-HPP(PHI-HPPx/EP) exhibits a superior shelf life than the one-component epoxy resin with EMI-HPP (EMI-HPPx/EP). PHI-HPPx/EP allows stable storage at room temperature exceeding 91 days, which is better than previous one-component epoxy resins cured by phosphorus-containing imidazole. PHI-HPP20/EP gels rapidly at 150 °C in only 5.7 min. Meanwhile, PHI-HPP20/EP exhibits excellent fire safety and its limiting oxygen index (LOI) is 35.8% achieving a UL-94 V-0 rating. Its peak heat release rate is reduced by 59.3% compared to PHI/EP. PHI-HPPx/EP features good transparency, mechanical properties and glass transition temperature (Tg). Therefore, this research presents a viable approach for preparing one-component epoxy resin with long shelf life, fast curing, flame retardant, transparency and high performance. © 2023, The Authors. All rights reserved.

关键词： Transparency

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Correction:White light emission in 0D halide perovskite[(CH_(3))_(3)S]_(2)SnCl_(6)·H_(2)O crystals through variation of doping ns^(2) ions

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Frontiers of Optoelectronics 2024年第4期17卷 105-107页

作者： Yitong Lin Yu Zhong Yangpeng Lin Jiawei Lin Lei Pang Zhilong Zhang Yi Zhao Xiao-Ying Huang Ke-Zhao Du Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering Collage of Chemistry and Material ScienceFujian Normal UniversityFuzhou 350007China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Qinghai Environmental Monitoring Center Xining 810000China Strait Institute of Flexible Electronics(SIFE Future Technologies)Fujian Normal University and Strait Laboratory of Flexible Electronics(SLoFE)Fuzhou 350007China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

Correction:Frontiers of Optoelectronics(2024)17:6 https://***/10.1007/s12200-024-00109-3 Following publication of the original article[1],the authors reported the errors,which need to be corrected:*** sentence in Results and discussion section has been updated from"The crystal belongs to the Fm-3 m space group with a unit cell length of 12.43 A."to"The crystal belongs to the Pa-3 space group with a unit cell length of 12.42 A."A cif file has been added as a Supplementary file for comparison with other readers.

关键词： belongs doping perovskite

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Improved Active Disturbance Rejection Control for PMSM Based on Modified Extended state Observer

Improved Active Disturbance Rejection Control for PMSM Based...

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Smart Power & Internet Energy Systems (SPIES), International Conference on

作者： Xianxin Zhou Qiang Xu State Key Laboratory of Advanced Electromagnetic Engineering and Technology(School of Electrical and Electronic Engineering) Huazhong University of Science and Technology Wuhan China

Active disturbance rejection control (ADRC) is a new algorithm used in permanent magnet synchronous motor (PMSM) drive system which has a better tracking performance than proportional-integral (PI). Extended state observer (ESO) is the core part of ADRC which can estimate the total unknown disturbances and compensate for the influences in the closed- loop dynamics. The observation accuracy of ESO directly affects the compensation ability of the system. In order to promote the observation precision of ESO and improve the control performance of ADRC, a modified-structure ESO is proposed in this paper. Some simulation experiments are performed and the results indicate that the proposed controller can provide better speed dynamic and static performance under load disturbances.

关键词： Robust control Resistance Simulation Magnetic cores Observers Permanent magnet motors Load management

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Afterglow Carbon Dots:From Fundamentals to Applications

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Research 2021年第1期2021卷 330-356页

作者： Chenxi Peng Xue Chen Meiling Chen Shenci Lu Yu Wang Suli Wu Xiaowang Liu Wei Huang Frontiers Science Center for Flexible Electronics(FSCFE) MIIT Key Laboratory of Flexible Electronics(KLoFE)Shaanxi Key Laboratory of Flexible ElectronicsXi’an Key Laboratory of Flexible ElectronicsXi’an Key Laboratory of Biomedical Materials&EngineeringXi’an Institute of Flexible ElectronicsInstitute of Flexible Electronics(IFE)Northwestern Polytechnical UniversityXi’an710072 ShaanxiChina International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsChina State Key Laboratory of Fine Chemicals Dalian University of Technology2nd Linggong RoadDalian 116024China Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjingChina Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)30 South Puzhu RoadNanjing 211816China

The ability of carbon dots(CDs)to emit afterglow emission in addition to fluorescence in response to UV-to-visible excitation allows them to be a new class of luminescent *** compared with traditional organic or inorganic afterglow materials,CDs have a set of advantages,including small size,ease of synthesis,and absence of highly toxic metal *** addition,high dependence of their afterglow color output on temperature,excitation wavelength,and aggregation degrees adds remarkable flexibility in the creation of multimode luminescence of CDs without the need for changing their intrinsic *** characteristics make CDs particularly attractive in the fields of sensing,anticounterfeiting,and data *** this review,we first describe the general attributes of afterglow CDs and their fundamental afterglow *** then highlight recent strategic advances in the generation or activation of the afterglow luminescence of *** emphasis is placed on the summarization of their emergent afterglow properties in response to external *** further highlight the emerging applications of afterglow CDs on the basis of their unique optical features and present the key challenges needed to be addressed before the realization of their full practical utility.

关键词： mechanism excitation luminescence

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An Organic–Inorganic Hybrid Material Based on Benzo[ghi]perylenetri-imide and Cyclic Titanium-Oxo Cluster for Efficient Perovskite and Organic Solar Cells

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CCS Chemistry 2022年第3期4卷 880-888页

作者： Zhou Zhang Faming Han Jie Fang Chaowei Zhao Shuai Li Yonggang Wu Yuefeng Zhang Shengyong You Binghui Wu Weiwei Li Institute of Applied Chemistry Jiangxi Academy of SciencesNanchang 330096 College of Chemistry and Environmental Science Hebei UniversityBaoding 071002 State Key Laboratory for Physical Chemistry of Solid Surfaces Pen-Tung Sah Institute of Micro-Nano Science and TechnologyCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005 Guangxi Key Laboratory of Low Carbon Energy Materials College of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541004 Beijing Advanced Innovation Center for Soft Matter Science and Engineering and State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029

Perovskite and organic solar cells usually require electron-transport interlayers to efficiently transport electrons from the photoactive layer to the metal *** general,pure organic or inorganic materials are applied into the interlayers,but organic–inorganic hybrid materials have been rarely reported for this *** this work,we report using the first titanium-oxo cluster-based organic–inorganic hybrid as the interlayer material by introducing largeπ-conjugated benzo[ghi]perylenetriimides as an organic part via a simple ligand-exchange *** new hybrid material showed excellent solubility,well-aligned energy levels,and excellent electron mobilities,enabling its great potential application as an interlayer in solar cells such as perovskite and organic solar cells,providing high power conversion efficiencies of>20%and 16%,***,we claim that our present work introduces a new class of cluster-based organic–inorganic hybrid interlayer materials that exhibit promising application in organic electronics.

关键词： organic-inorganic hybrid material Ti-oxo clusters perylene diimide perovskite solar cells organic solar cells

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In Situ Identification of Laser Directed Energy Deposition Condition Based on Acoustic Emission

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SSRN 2023年

作者： Li, Shihua Chen, Bo Tan, Caiwang Song, Xiaoguo State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China Shandong Provincial Key Laboratory of Special Welding Technology Harbin Institute of Technology at Weihai Weihai264209 China The Key Laboratory of Road and Traffic Engineering Ministry of Education Tongji University Shanghai201804 China

Additive manufacturing with remarkable merits has enormous potential and application prospects in plenty of fields. Unfortunately, the inconsistent quality of specimens fabricated is severely hindering this technology from meeting the criteria for commercialization. Exploitation of an efficient process monitoring method is essential to evaluate the usability of fabricated parts. Therefore, an in situ monitoring system based on acoustic emission sensing was proposed to acquire the information (elastic waves generated inside parts) during the manufacturing process. Initially, time-frequency analysis of the captured signals in the operation conditions of powder feeding solely, laser melting solely and deposition was carried out. The analysis had contributions to confirm the frequency band largely indicating powder colliding with substrate. Then, twelve typical statistical and three specific features from time and frequency domain were extracted to assist further information mining. Clustering analysis based on k-means was implemented to reveal the cohesiveness and isolation of samples from different classes in the feature space. Support vector machine, random forest and back propagation neural network were employed to construct models to identify different operation conditions or all groups of tracks. The results showed that all models were qualified to identify the operation conditions with a high precision. In the recognition of all group of tracks, support vector machine model achieved the best performance with an accuracy of 94%, which definitely indicates the feasibility and potential of AE sensing in the monitoring of laser directed energy deposition. © 2023, The Authors. All rights reserved.

关键词： Support vector machines

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Room Temperature Synthesis of Vertically Aligned Amorphous Ultrathin NiCo-LDH Nanosheets Bifunctional Flexible Supercapacitor Electrodes

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Energy & Environmental Materials 2024年第2期7卷 277-286页

作者： Kwadwo Asare Owusu Zhaoyang Wang Ali Saad Felix Ofori Boakye Muhammad Asim Mushtaq Muhammad Tahir Ghulam Yasin Dongqing Liu Zhengchun Peng Xingke Cai Institute for Advanced Study Shenzhen UniversityShenzhen 518060China College of Physics and Optoelectronics Shenzhen University3688 Nanhai BoulevardNanshan DistrictShenzhen 518060China School of Chemistry and Materials Science Hubei Engineering UniversityNo.272 Traffic AvenueXiaogan 432000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyNo.122 Luoshi RoadWuhan 430070China Key Laboratory of Green Printing CAS Research Centre for Excellence in Molecular ScienceInstitute of Chemistry Chinese Academy of Sciences(ICCAS)Beijing 100190China College of Mechatronics and Control Engineering Shenzhen University3688 Nanhai BoulevardNanshan DistrictShenzhen 518050China

Developing a simple scalable method to fabricate electrodes with high capacity and wide voltage range is desired for the real use of electrochemical ***,we synthesized amorphous NiCo-LDH nanosheets vertically aligned on activated carbon cloth substrate,which was in situ transformed from Co-metal-organic framework materials nano-columns by a simple ion exchange process at room *** to the amorphous and vertically aligned ultrathin structure of NiCo-LDH,the NiCo-LDH/activated carbon cloth composites present high areal capacities of 3770 and 1480 mF cm^(-2)as cathode and anode at 2 mA cm^(-2),and 79.5%and 80%capacity have been preserved at 50 mA cm^(-2).In the meantime,they all showed excellent cycling performance with negligible change after>10000 *** fabricating them into an asymmetric supercapacitor,the device achieves high energy densities(5.61 mWh cm^(-2)and 0.352 mW cm^(-3)).This work provides an innovative strategy for simplifying the design of supercapacitors as well as providing a new understanding of improving the rate capabilities/cycling stability of NiCo-LDH materials.

关键词： amorphous nanosheets aqueous supercapacitor high volumetric/areal energy density NiCo-LDH room temperature synthesis

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