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advanced Aramid Fibrous materials:fundamentals,Advances,and Beyond

advanced Fiber materials 2024年第1期6卷 3-35页

作者： Annan He Tonghe Xing Zihui Liang Yuxin Luo Yu Zhang Mengqi Wang Zhiyu Huang Jie Bai Liuyan Wu Zhicheng Shi Hongmei Zuo Wenshuo Zhang Fengxiang Chen Weilin Xu State Key Laboratory of New Textile materials and advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile UniversityWuhan 430200China College of Textiles and Clothing Qingdao UniversityQingdao 266071China China Textile Engineering Society Beijing 100025China School of Textile and Garment Anhui Polytechnic UniversityWuhu 241000China

Aramid fibers(AFs)are widely applied in many cutting-edge fields,due to their excellent comprehensive *** research efforts are therefore underway to expand the applicability by designing more environmentally friendly and low-cost synthesis methods,incorporating new chemical components in the skeletons or internal structures of polyamide to enhance their processability and *** being at the forefront of scientific research,there are fewer reviews that comprehensively summarize the latest progress of *** review focuses on the fundamental research of AFs since their inception and summarizes the advanced progress and applications of ***,the synthesis mechanism and methods of AFs and their structure-property relationship are comprehensively ***,we review the recent progress in surface functionalization of AFs by using advanced micro-nanoscale modification strategies to enhance the interface properties and ultraviolet(UV)-resistance properties,and summarize the advantages and disadvantages of various modified ***,applications of AF and aramid nanofiber(ANF)in various fields are ***,the possible challenges and outlooks toward the future development of AFs are highlighted,which is expected to provide new insights for the next-generation advanced functional AF materials and facilitate the industrialization development level for high-performance AFs and their composites.

关键词： Aramid fiber Surface functionalization Application Challenges and outlooks

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FedDAA:a robust federated learning framework to protect privacy and defend against adversarial attack

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Frontiers of Computer Science 2024年第2期18卷 107-122页

作者： Shiwei LU Ruihu LI Wenbin LIU fundamentals Department Air Force Engineering UniversityXi’an 710051China Institute of advanced Computational Science and Technology Guangzhou UniversityGuangzhou 510006China

Federated learning(FL)has emerged to break data-silo and protect clients’privacy in the field of artificial ***,deep leakage from gradient(DLG)attack can fully reconstruct clients’data from the submitted gradient,which threatens the fundamental privacy of *** cryptology and differential privacy prevent privacy leakage from gradient,they bring negative effect on communication overhead or model ***,the original distribution of local gradient has been changed in these schemes,which makes it difficult to defend against adversarial *** this paper,we propose a novel federated learning framework with model decomposition,aggregation and assembling(FedDAA),along with a training algorithm,to train federated model,where local gradient is decomposed into multiple blocks and sent to different proxy servers to complete *** bring better privacy protection performance to FedDAA,an indicator is designed based on image structural similarity to measure privacy leakage under DLG attack and an optimization method is given to protect privacy with the least proxy *** addition,we give defense schemes against adversarial attack in FedDAA and design an algorithm to verify the correctness of aggregated *** results demonstrate that FedDAA can reduce the structural similarity between the reconstructed image and the original image to 0.014 and remain model convergence accuracy as 0.952,thus having the best privacy protection performance and model training *** importantly,defense schemes against adversarial attack are compatible with privacy protection in FedDAA and the defense effects are not weaker than those in the traditional ***,verification algorithm of aggregation results brings about negligible overhead to FedDAA.

关键词： federated learning privacy protection adversarial attacks aggregated rule correctness verification

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High-temperature-tolerant flexible supercapacitors: Gel polymer electrolytes and electrode materials

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Journal of Energy Chemistry 2025年第1期100卷 426-457页

作者： Chong Peng Xinyi Huang Mingwei Zhao Shuling Liao Quanhong Yang Nianjun Yang Siyu Yu School of Chemistry & Chemical Engineering Southwest University Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Department of Chemistry & IMO-IMOMEC Hasselt University

The development of flexible supercapacitors(FSCs) capable of operating at high temperatures is crucial for expanding the application areas and operating conditions of supercapacitors. Gel polymer electrolytes and electrode materials stand as two key components that significantly impact the efficacy of hightemperature-tolerant FSCs(HT-FSCs). They should not only exhibit high electrochemical performance and excellent flexibility, but also withstand intense thermal stress. Considerable efforts have been devoted to enhancing their thermal stability while maintaining high electrochemical and mechanical performance. In this review, the fundamentals of HT-FSCs are outlined. A comprehensive overview of state-of-the-art progress and achievements in HT-FSCs, with a focus on thermally stable gel polymer electrolytes and electrode materials is provided. Finally, challenges and future perspectives regarding HT-FSCs are discussed, alongside strategies for elevating operational temperatures and *** review offers both theoretical foundations and practical guidelines for designing and manufacturing HT-FSCs, further promoting their widespread adoption across diverse fields.

关键词： Polymer membrane electrodes

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Polymer complexation for functional fibers

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Science China(Technological Sciences) 2019年第6期62卷 931-944页

作者： HUANG WenTao LIU DeZhong LI JieFu ZHU LiPing YANG ShuGuang State Key Laboratory for Modification of Chemical Fibers and Polymer materials College of Materials Science and Engineering Center for Advanced Low-dimension Materials Donghua University

Polymer complex is a polymer association of different polymers with good miscibility resulting from the relatively strong intermolecular interactions or stereo match effect between polymer chains. Polymer complexes have been utilized in various fields, such as food, biomedical, cosmetic, and pharmacy. Fiber is one of the most important material forms, and shaping polymer complex into fiber will further extend its applications. This review briefly introduces the fundamentals of polymer complex, and then demonstrates the main approaches to produce polymer complex fibers(PCFs). Followed by, the modification of fibers with polymer complexes is presented. Finally, the applications of PCFs and the polymer complex modified fibers are provided, and the prospect of polymer complexation for fibers is discussed properly.

关键词： interpolymer complex functional fiber polyelectrolyte complex hydrogen-bonded polymer complex fiber modification

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advanced development of grain boundaries in TMDs from fundamentals to hydrogen evolution application

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Chinese Chemical Letters 2024年第5期35卷 117-129页

作者： Ziyang Yin Lingbin Xie Weinan Yin Ting Zhi Kang Chen Junan Pan Yingbo Zhang Jingwen Li Longlu Wang College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&Telecommunications(NJUPT)Nanjing 210023China Institute of advanced materials(IAM)&Institute of Flexible Electronics(Future Technology) Nanjing University of Posts&Telecommunications(NJUPT)Nanjing 210023China

Grain boundary(GB),as a kind of lattice defect,widely exists in two-dimensional transition metal dichalcogenides(2D TMDs),which has complex and diverse influences on the physical/chemical properties of 2D *** are universally considered to be a double-edged sword,although some electrical and mechanical properties of 2D TMDs would be adversely affected leading to the reduced overall quality,certain structure-oriented applications could be realized based on its unique *** this review,we first detailed the atomic structure characteristics of GBs and the corresponding techniques,then we systematically summarized the methods of introducing GBs into 2D ***,we expounded unique electrical,mechanical,and chemical properties of the GBs in 2D TMDs and clarified its internal relationship with the atomic ***,the application of GB structure in hydrogen evolution reaction(HER)is also *** the end,we make a conclusion and put forward outlooks,hoping to further promote the basic research of GB and boost the wide application of 2D TMDs.

关键词： Grain boundary Transition metal dichalcogenides Two-dimensional materials Hydrogen evolution reaction Dislocation Molybdenum disulfide

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Liquid crystal-templated chiral nanomaterials: from chiral plasmonics to circularly polarized luminescence

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Light(Science & Applications) 2022年第8期11卷 1753-1781页

作者： Xuan Zhang Yiyi Xu Cristian Valenzuela Xinfang Zhang Ling Wang Wei Feng Quan Li School of materials Science and Engineering Tianjin University300350TianjinChina Institute of advanced materials and School of Chemistry and Chemical Engineering Southeast University211189NanjingChina advanced materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program Kent State UniversityKentOH44242USA

Chiral nanomaterials with intrinsic chirality or spatial asymmetry at the nanoscale are currently in the limelight of both fundamental research and diverse important technological applications due to their unprecedented physicochemical characteristics such as intense light-matter interactions, enhanced circular dichroism, and strong circularly polarized luminescence. Herein, we provide a comprehensive overview of the state-of-the-art advances in liquid crystal-templated chiral nanomaterials. The chiroptical properties of chiral nanomaterials are touched, and their fundamental design principles and bottom-up synthesis strategies are discussed. Different chiral functional nanomaterials based on liquid-crystalline soft templates, including chiral plasmonic nanomaterials and chiral luminescent nanomaterials, are systematically introduced, and their underlying mechanisms, properties, and potential applications are emphasized. This review concludes with a perspective on the emerging applications, challenges, and future opportunities of such fascinating chiral nanomaterials. This review can not only deepen our understanding of the fundamentals of soft-matter chirality, but also shine light on the development of advanced chiral functional nanomaterials toward their versatile applications in optics, biology, catalysis, electronics, and beyond.

关键词： chiral circular polarized

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Transition metal carbonate anodes for Li-ion battery: fundamentals,synthesis and modification

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Journal of Energy Chemistry 2022年第7期31卷 95-120,I0004页

作者： Rui Zhang Qingfeng Fu Peng Gao Wang Zhou Hui Liu Chaohe Xu Jian-Fang Wu Chuanjun Tu Jilei Liu College of materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangsha 410082HunanChina College of Chemistry and Material Science Hunan Agricultural UniversityChangsha 410128HunanChina College of Aerospace Engineering Chongqing UniversityChongqing 400044China

Even though transition metal carbonates(TMCs, TM = Fe, Mn, Co, Ni etc.), show high theoretical capacities, rich reserves and environmental friendliness as anodes for lithium-ion batteries(LIBs), they suffer from sluggish electronic/ionic conductivities and huge volume variation, which severely deteriorate the rate capacities and cycling performances. Understanding the intrinsic reaction mechanism and further developing ideal TMC-based anode with high specific capacity, excellent rate capabilities, and longterm cycling stability are critical for the practical application of TMCs. In this review, we firstly focus on the fundamental electrochemical energy-storage mechanisms of TMCs, in terms of conversionreaction process, pseudocapacitance-type charge storage, valence change for charge storage and catalytic conversion mechanisms. Based on the reaction mechanisms, various modification strategies to improve the electrochemical performance of TMCs are summarized, covering:(i) micro-nano structural engineering, in which the influence factors on the morphology are discussed, and multiple architectures are listed;(ii) elemental doping, in which the intrinsic mechanisms of metal/nonmetal elements doping on the electrochemical performance are deeply explored;(iii) multifunctional compositing strategies, in which the specific affections on structure, electronic conductivity and chemo-mechanical stability are ***, the key challenges and opportunities to develop high-performance TMCs are discussed and some solutions are also proposed. This timely review sheds light on the path towards achieving cost-effective and safe LIBs with high energy density and long cycling life using TMCs-based anode materials.

关键词： Transition metal carbonates Electrochemical reaction mechanism Micro-nano structure engineering Elemental doping Multifunctional compositing

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Garnet-type solid electrolyte:Advances of ionic transport performance and its application in all-solid-state batteries

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Journal of advanced Ceramics 2021年第5期10卷 933-972页

作者： P.M.GONZALEZ PUENTE Shangbin SONG Shiyu CAO Leana Ziwen RANNALTER Ziwen PAN Xing XIANG Qiang SHEN Fei CHEN State Key Lab of advanced Technology for materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China International School of materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

All-solid-state lithium batteries(ASSLBs),which use solid electrolytes instead of liquid ones,have become a hot research topic due to their high energy and power density,ability to solve battery safety issues,and capabilities to fulfill the increasing demand for energy storage in electric vehicles and smart grid ***-type solid electrolytes have attracted considerable interest as they meet all the properties of an ideal solid electrolyte for *** garnet-type Li_(7)La_(3)Zr_(2)O_(12)(LLZO)has excellent environmental stability;experiments and computational analyses showed that this solid electrolyte has a high lithium(Li)ionic conductivity(10^(-4)-10^(-3) S·cm^(-1)),an electrochemical window as wide as 6 V,stability against Li metal anode,and compatibility with most of the cathode *** this review,we present the fundamentals of garnet-type solid electrolytes,preparation methods,air stability,some strategies for improving the conductivity based on experimental and computational results,interfacial issues,and finally applications and challenges for future developments of LLZO solid electrolytes for ASSLBs.

关键词： Li_(7)La_(3)Zr_(2)O_(12)(LLZO) solid electrolytes lithium ionic conductivity lithium concentration mobility of lithium-ion air stability solid-state batteries

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fundamentals of fast reduction of ultrafine iron ore at low temperature

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Journal of University of Science and Technology Beijing 2008年第2期15卷 104-109页

作者： Pei Zhao Peimin Guo State Key Laboratory for advanced Iron and Steel Processes and materials China Iron and Steel Research Institute Group Beijing 100081 China

fundamentals on the fast reduction of ultrafine iron ore at low temperature, including characterization of ultrafine ore, deoxidation thermodynamics of stored-energy *** ore, kinetics of iron ore deoxidation, and deoxidation mechanism, etc., and a new ironmaking process are presented in this article. Ultrafine ore concentrate with a high amount of stored energy can be produced by mechanical milling, and can be deoxidated fast below 700℃ by either the coal-based or gas-based process. This novel process has some advantages over others： high productivity, low energy consumntion, and environmental friendliness.

关键词： ironmaking low temperature fast reduction powder refining thermodynamics kinetics

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Overview of magnetoelastic coupling in (Mn, Fe)2(P, Si)-type magnetocaloric materials

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Rare Metals 2018年第9期37卷 723-733页

作者： Xue-Fei Miao Shu-Yuan Hu Feng Xu Ekkes Bruck MIIT Key Laboratory of advanced Metallic and Intermetallic materials Technology School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China Fundamental Aspects of materials and Energy Department of Radiation Science and Technology Delft University of Technology Mekelweg 15 2629 JB Delft The Netherlands

（MnFe）2（P, Si）-type compounds are, to date, one of the best candidates for magnetic refrigeration and energy conversion applications due to the combination of giant magnetocaloric effect （MCE）, tunable working temperature range and low material cost. The giant MCE in the （Mn, Fe）2（P, Si）-type compounds originates from strong mag- netoelastic coupling, where the lattice degrees of freedom and spin degrees of freedom are efficiently coupled. The tunability of the phase transition, in terms of the critical temperature and the character of the phase transition, is essentially attributed to the changes in the magnetoelastic coupling in the （Mn, Fe）2（P, Si）-type compounds. In this review, not only the fundamentals of the magnetoelastic coupling but also the related practical aspects such as magnetocaloric performance, hysteresis issue and mechanical stability are discussed for the （Mn, Fe）2（P, Si）- type compounds. Additionally, some future fundamental studies on the MCE as well as possible ways of solving the hysteresis and fracture issues are proposed.

关键词： (Mn, Fe)2(P, Si) Magnetocaloric effect Magnetoelastic coupling Hysteresis Mechanical stability

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