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Emulsion Binders with Multiple Crosslinked Structures for High-Performance Lithium-Sulfur Batteries

Chinese Journal of Polymer science 2023年第7期41卷 1027-1036页

作者： Ya-Fang Tan Wen-Qiang Wang Ling Gao Ai-Guo Guan Geng-Chao Wang Shanghai Key Laboratory of Advanced Polymeric Materials Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

Lithium-sulfur batteries suffer a lot from the huge volume change and the shuttle effect. However, conventional poly(vinylidene fluoride) binder has intrinsic drawbacks, such as low ion conductivity, weak polysulfide-trapping ability, poor mechanical properties, and requirement of organic solvents. Herein, we designed a functional emulsion binder with multi crosslinked structure. Such a structure was formed by the covalent crosslinking within and between the emulsion particles, which facilitates the adapting of the volume expansion of sulfur cathode, thereby ensuring the integrity of electrodes. Besides, the polar functional groups endow the binder with strong chemisorption of lithium polysulfide and fast lithium-ion migration ability. Thus, the assembled lithium-sulfur battery displayed a high initial discharge capacity of 1246 mAh·g^(−1) at 0.1 C, and a capacity fading rate of 0.04% per cycle after 500 cycles at 0.5 C. Even at a high sulfur mass loading of 4.8 mg·cm^(−2), a high capacity of 956 mAh·g^(−1) was still obtained at 0.2 C.

关键词： Acrylate copolymer Internal and external crosslinking Emulsion binders Lithium-sulfur batteries

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Lamellar-assembled PdNi super-nanosheets as effective oxygen redox dual-electrocatalysts for rechargeable Zn-air batteries

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Nano Research 2023年第2期16卷 2163-2169页

作者： Luhong Fu Kai Liu Chao Zhen Yuxin Zhu Zixi Lyu Guifen Du Shuifen Xie Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing Instrumental Analysis CenterCollege of Materials Science and EngineeringHuaqiao UniversityXiamen 361021China

Exploration of bifunctional electrocatalysts toward effective oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is pivotal for developing high-efficiency and rechargeable metal-air batteries but remains great *** we elaborately synthesize lamellar-assembled PdNi super-nanosheets(SNSs)with an optimized Pd/Ni molar ratio to serve as attractive ORR and OER bifunctional electrocatalysts for rechargeable high-powered Zn-air batteries(ZABs).The products are layer-by-layer stackings of ultrathin PdNi nanosheet *** the drastically extended two-dimensional(2D)surface,the inserted Ni atoms can substantially lower down the d-band center of surface Pd toward improved ORR kinetics and concurrently create oxytropic NiOx sites to adsorb–OH groups for promoting the reverse OER ***,the ORR mass activity and specific activity of the primary Pd_(92)Ni_(8)SNSs attain 2.5 A·mg^(−1)and 3.15 mA·cm^(−2),which are respectively 14 and 9 times those of commercial Pt/***,the OER activity and stability of Pd_(92)Ni_(8)SNSs/C distinctly outperform those of the RuO_(2)benchmark,suggesting excellent reversible oxygen *** power density of the ZAB with Pd_(92)Ni_(8)SNSs/C as the air cathode is 2.7 times higher than that by Pt/C ***,it can last for over 150 h without significant performance degradation during the charge–discharge cycle *** work showcases a feasible strategy for developing self-assembled multimetallic 2D nanomaterials with excellent bifunctional catalytic performances toward energy conversion applications.

关键词： Pd-based nanomaterials oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)bifunctional

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Molecular Dynamics Study on the Interactions of 1/2Edge Dislocations with Voids and Ni_(3)Al Precipitates in FCC Ni

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Acta Mechanica Solida Sinica 2025年第1期38卷 1-13页

作者： Wendong Cui Junfeng Nie Pandong Lin Lei He Institute of Nuclear and New Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing100084China Ministry of Education Key Laboratory for Liquid-Solid Structural Evolution and Processing of MaterialsSchool of Materials Science and EngineeringShandong UniversityJinan250061China

Nickel-based alloys are the primary structural materials in steam generators of high-temperature gas *** understand the irradiation effect of nickel-based alloys,it is necessary to examine dislocation movement and its interaction with irradiation defects at the *** due to voids and Ni_(3)Al precipitates may significantly impact irradiation damage in nickel-based *** paper employs the molecular dynamics method to analyze the interaction between edge dislocations and irradiation defects(void and Ni_(3)Al precipitates)in face-centered cubic *** effects of temperature and defect size on the interaction are also *** results show that the interaction process of the edge dislocation and irradiation defects can be divided into four stages:dislocation free slip,dislocation attracted,dislocation pinned,and dislocation *** modes include the formation of stair-rod dislocations and the climbing of extended dislocation bundles for voids,as well as the generation of stair-rod dislocation and dislocation shear for ***,the interactions of edge dislocations with voids and Ni_(3)Al precipitates are strongly influenced by temperature and defect size.

关键词： Void Ni_(3)Al precipitate Nickel Edge dislocation Molecular dynamics

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Carbon nanomaterials for aqueous zinc-ion capacitors:recent progress,challenges,and perspectives

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Rare Metals 2024年第12期43卷 6255-6287页

作者： Qing Wang Wei-Qing Yang Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031China Research Institute of Frontier Science Southwest Jiaotong UniversityChengdu610031China

Zinc-ion hybrid capacitors(ZHCs),integrating the high power density of supercapacitors and high energy density of batteries,are an emerging and sustainable electrochemical energy storage ***,the poor rate performance,low utilization of active sites and unsatisfactory cycling life of capacitive-type cathode are still current technical challenges,while the uneven deposition of zinc anode generates a large number of dendrites,which can easily penetrate the separator to cause device failure,greatly limiting the commercialization prospects of ***,this review systematically elaborates on the current research progress of cathode materials for ZHCs,including preparation methods and structural design of porous carbon and heteroatom-doped porous carbon,deeply analyzing and discussing the energy storage mechanism and electrochemical ***,this review analyzes the causes and inhibition mechanisms of zinc dendrites,including electrolyte modification,induced uniform deposition of zinc and zinc anode modification,systematically elaborating on the three directions of current modification strategies for zinc ***,the current challenges and future development of cathode materials and dendrite suppression were prospected,developing a high-performance ZHCs.

关键词： Zinc-ion hybrid capacitors Capacitive-type cathode Porous carbon Energy storage mechanism Dendrite suppression

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Scalable fabrication of high-performance two-dimensional nanocomposites

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science Bulletin 2025年第9期70卷 1368-1370页

作者： Zhu, Liping Zhu, Meifang State Key Laboratory of Advanced Fiber Materials College of Materials Science and Engineering Donghua University Shanghai201620 China

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Editable semiconductor photo-electrodes for sustainable ammonia synthesis

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Nano Research 2024年第4期17卷 3107-3112页

作者： Ning Lan Kun Du Erling Zhao Wei Zhao Tao Ling Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education Institute of New-EnergySchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China School of Materials Science and Engineering Tianjin Chengjian UniversityTianjin 300384China

Powered by an inexhaustible supply of solar energy,photoelectrochemical(PEC)nitrogen reduction reaction(NRR)provides an ideal solution for the synthesis of green ammonia(NH_(3)).Although great efforts have been made in the past decades,there are still significant challenges in increasing the NH_(3) yields of the PEC-NRR *** addition to the issues of low activity and selectivity similar to electrochemical NRR,the progress of PEC-NRR is also impeded by the limited increase in NH_(3) yields as the electrode is ***,we propose an editable electrode design strategy that parallels unit photo-electrodes to achieve a linear increase in NH_(3) yields with electrode active *** demonstrate that the editable electrode design strategy minimizes the electrode charge transfer resistance,allowing more photo-generated carriers to reach the electrode surface and promote the catalytic *** believe that this editable electrode design strategy provides an avenue to achieve sustainable PEC NH_(3) production.

关键词： editable electrode photoelectrochemical nitrogen reduction reaction parallel electrode ZnSe

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Regulation of solvation structure and electrochemical performance optimization in Zn(NH_(2)SO_(3))_(2)-based electrolytes

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Journal of Energy Chemistry 2025年第5期104卷 644-654页

作者： Lei Liu Ruxue Yan Songyan Jiang Xiao Liu Zhonghua Zhang Xiaosong Guo Xingguang Liu Jun Zheng Guicun Li College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Anhui University of TechnologyMa’anshan 243002AnhuiChina

Monovalent anions,with relatively low charge density,exhibit weak bond energy with Zn^(2+)ions,which facilitates the solubility of Zn salts and the regulation of solvation *** this study,zinc bis(aminosulfate)(Zn(NH_(2)SO_(3))_(2))with a monovalent anion,NH_(2)SO_(3)^(-),was synthesized and dissolved in different ratios of dimethyl sulfoxide(DMSO)and H_(2)O as electrolytes for Zn-ion batteries(ZIBs).From the perspective of game theory,the influences of DMSO and H_(2)O on the solvation structure and electrochemical performance of the Zn(NH_(2)SO_(3))_(2)based electrolytes has been meticulously *** and spectra analysis indicate that DMSO molecules are reluctant to penetrate the primary solvation structure of Zn^(2+)***,increasing DMSO in electrolytes can induce a transition from solvent-separated ion pairs(SSIP)to contact ion pairs(CIP),resulting in an enrichment of anions in the primary solvation *** alteration can significantly suppress parasitic reactions,enhance nucleation density,and refine the deposition morphology during the Zn plating process,leading to superior cyclic stability and high coulombic efficiency(CE)of Zn//Cu and Zn//Zn ***,the enrichment of anions in the primary solvation structure also inhibits the activity of Zn^(2+)ions,amplifies the polarization effect,and engenders a sluggish ionization dynamics,resulting in the low energy conversion efficiency of the *** findings underscore the influence of the anion ratio within the primary solvation structure on electrochemical properties of electrolytes for ZIBs,which may be a pivotal determinant in the Zn deposition process.

关键词： Monovalent anion Primary solvation structure Impressed current cathodic protection Game theory CIP

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Work-function effect of Ti_(3)C_(2)/Fe-N-C inducing solid electrolyte interphase evolution for ultra-stable sodium storage

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Nano Research 2024年第8期17卷 7163-7173页

作者： Huicong Xia Lingxing Zan Hongliang Dong Yifan Wei Yue Yu Jinfu Shu Jia-Nan Zhang Chong-Xin Shan Key Laboratory of Advanced Energy Catalytic and Functional Material Preparation of Zhengzhou College of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China Key Laboratory of Chemical Reaction Engineering of Shaanxi Province College of Chemistry and Chemical EngineeringYan’an UniversityYan’an 716000China Center for High Pressure Science and Technology Advanced Research PudongShanghai 201203China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

In the quest to enhance the efficiency of sodium-ion batteries,the dynamics of solid electrolyte interphase(SEI)formation are of paramount *** SEI layer’s integrity is integral to the charge–discharge efficiency and the overall longevity of the ***,a novel two-dimensional Ti_(3)C_(2) fragments enmeshed on iron-nitrogen-carbon(Fe-N-C)nanosheets(Ti_(3)C_(2)/Fe-NC)has been *** electrode features a matrix which has been shown to expedite SEI layer formation through the facilitation of selective anion adsorption,thus augmenting battery *** functional theory calculation reveals that the SEI evolution energy of NaPF6 at the Ti_(3)C_(2)/Fe-N-C interface is 0.81 eV,significantly lower than the Ti_(3)C_(2)(1.23 eV).This process is driven by the electron transportation from Ti_(3)C_(2) to Fe-N-C substrate,facilitated by their work-function difference,leading to the formation of ferromagnetic Fe species,which possesses Fe 3d d_(xz)d_(z)2 orbitals and undergoes hybridization with theπandσorbitals of NaF,creating a key intermediate during *** process diminishes the antibonding energy and attenuates the orbital interaction with NaF,thus reducing the activation energy and improving the SEI formation reaction ***,it leads to the creation of multi-interface SEI characterized by high-throughput ion transport and an efficient reaction network.

关键词： Ti_(3)C_(2)/Fe-N-C heterostructure work-function electron interaction solid electrolyte interphase sodium storage

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A novel MgF2/PDA/S-HA coating on the bio-degradable ZE21B alloy for better multi-functions on cardiovascular application

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Journal of Magnesium and Alloys 2023年第2期11卷 480-492页

作者： Yang Yu Shi-Jie Zhu Hao-Tian Dong Xue-Qi Zhang Jing-An Li Shao-Kang Guan School of Materials Science and Engineering&Henan Key Laboratory of Advanced Magnesium Alloy&Key Laboratory of Materials Processing and Mold Technology(Ministry of Education) Zhengzhou UniversityZhengzhou 450001China

Recently, functional molecules such as Polydopamine(PDA), Hyaluronic Acid(HA) and heparin have been widely studied in the field of surface modification of magnesium(Mg) alloy stents for better degradation behavior and biocompatibility, but their further application is limited by undesirable anticoagulant function, uncontrollable degradation and easy bleeding, *** to this consideration, a magnesium Fluoride/Polydopamine/Sulphonated hyaluronic acid(Mg F2/PDA/S-HA) composite coating was successfully prepared by applying S-HA with sulfur content of 9.71 wt% on the surface of ZE21B alloy in this study. The results showed that the composite coating with a unique mesh structure not only inherited the anticoagulant effect of sulfonic acid group and the excellent cyto-compatibility of S-HA with high sulfur content, but also significantly improved the corrosion performance of ZE21B *** results indicate a great application potential of the composite coating in the field of cardiovascular biomaterials.

关键词： Bio-degradable magnesium alloy Cardio-vascular stents Composite coating Sulphonated hyaluronic acid

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Multi-Scale Time Series Segmentation Network Based on Eddy Current Testing for Detecting Surface Metal Defects

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IEEE/CAA Journal of Automatica Sinica 2025年第3期12卷 528-538页

作者： Xiaorui Li Xiaojuan Ban Haoran Qiao Zhaolin Yuan Hong-Ning Dai Chao Yao Yu Guo Mohammad S.Obaidat George Q.Huang the School of Intelligence Science and Technology University of Science and Technology Beijing the Beijing Advanced Innovation Center for Materials Genome Engineering the Key Laboratory of Intelligent Bionic Unmanned Systems and the Institute of Materials Intelligent Technology Liaoning Academy of Materials IEEE the Department of Computer Science Hong Kong Baptist University the School of Computer and Communication Engineering Key Laboratory of Advanced Materials and Devices for Post-Moore Chips Ministry of Education University of Science and Technology Beijing the Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing the School of Computer and Communication Engineering University of Science and Technology Beijing the King Abdullah Ⅱ School of Information Technology The University of Jordan the Department of Computational Intelligence the School of Computing SRM University the School of Engineering The Amity University The Hong Kong Polytechnic University

In high-risk industrial environments like nuclear power plants, precise defect identification and localization are essential for maintaining production stability and safety. However, the complexity of such a harsh environment leads to significant variations in the shape and size of the defects. To address this challenge, we propose the multivariate time series segmentation network(MSSN), which adopts a multiscale convolutional network with multi-stage and depth-separable convolutions for efficient feature extraction through variable-length templates. To tackle the classification difficulty caused by structural signal variance, MSSN employs logarithmic normalization to adjust instance distributions. Furthermore, it integrates classification with smoothing loss functions to accurately identify defect segments amid similar structural and defect signal subsequences. Our algorithm evaluated on both the Mackey-Glass dataset and industrial dataset achieves over 95% localization and demonstrates the capture capability on the synthetic dataset. In a nuclear plant's heat transfer tube dataset, it captures 90% of defect instances with75% middle localization F1 score.

关键词： Eddy current testing nondestructive testing semantic segmentation time series analysis

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