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Dependence of electromagnetic wave absorption properties on the topography of Ni anchoring on reduced graphene oxide

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Chinese Chemical Letters 2021年第2期32卷 870-874页

作者： Luyang Liang Zhaoyang Li Zhongyi Bai Yuezhan Feng Xiaoqin Guo Jianmin Ma Chuntai Liu Key Laboratory of AdvancedεMaterials Processing Mold Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou 450046China Key Laboratory for Micro-/Nano-Optoelectronic Devices Ministry of EducationSchool of Physics and ElectronicsHunan UniversityChangsha 410022China

Specific topographic Ni anchoring on reduced graphene oxide(rGO) composites show an astronomical potential as effective wave absorbers due to the synergistic electromagnetic loss ***,Ni/rGO composites with different topography were successfully prepared via hydrothermal in-situ reduction *** structure and morphology characteristics revealed that particle-like,chain-like,coin-like and flower-like Ni were closely anchored onto rGO,*** electromagnetic wave absorption(EMA) performance revealed that chain-like Ni/rGO exhibited the optimal reflection loss of-43.7 dB with a thickness of 1.8 mm as well as the EAB of 6.1 GHz at 2.0 mm among all samples due to the good impedance match and the synergistic dielectric and magnetic ***,one conclusion can be drawn that excellent magnetic coupling effect and impedance matching were the main reasons for significantly improving the EMA *** the systematic dependence of morphology on EMA,this work provides a perspective for designing high-performance absorbing materials.

关键词： Ni/rGO Morphology structure Magnetic coupling effect Synergistic effect Electromagnetic wave absorption

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Synthesis of covalently bonded reduced graphene oxide-Fe_(3)O_(4) nanocomposites for efficient electromagnetic wave absorption

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Journal of materials Science & Technology 2021年第13期72卷 93-103页

作者： Xudong Liu Ying Huang Ling Ding Xiaoxiao Zhao Panbo Liu Tiehu Li MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China NPU-NCP Joint International Research Center on Advanced Nanomaterials&Defects Engineering State Key Laboratory of Solidification ProcessingShaanxi Engineering Laboratory for Graphene New Carbon Materials and ApplicationsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

High-performance electromagnetic(EM)wave absorbers,covalently bonded reduced graphene oxideFe_(3)O_(4) nanocomposites(rGO-Fe_(3)O_(4)),are synthesized via hydrothermal reaction,amidation reaction and reduction *** microstructure,surface element composition and morphology of rGO-Fe_(3)O_(4) nanocomposites are characterized and corresponding EM wave absorption properties are analyzed in great *** demonstrates that Fe_(3)O_(4) nanoparticles are successfully covalently grafted onto graphene by amide *** the mass ratio of rGO and Fe_(3)O_(4) is 2:1(sample S2),the absorber exhibits the excellent EM wave absorption performance that the maximum reflection loss(RL)reaches up to-48.6 dB at 14.4 GHz,while the effective absorption bandwidth(RL<-10 dB)is 6.32 GHz(11.68-18.0 GHz)with a matching thickness of 2.1 ***,radar cross section(RCS)simulation calculation is also adopted to evaluate the ability of absorbers to scatter EM waves,which proves again that the absorption performance of absorber S2 is *** outstanding EM wave absorption performance is attributed to the synergistic effect between dielectric and magnetic loss,good attenuation ability and excellent impedance ***,covalent bonds considered to be carrier channels can facilitate electron migration,adjust EM parameters and then enhance EM wave absorption perfo *** work provides a possible method for preparing efficient EM wave absorbers.

关键词： Covalent bond EM wave absorption RCS simulation calculation rGO-Fe_(3)O_(4)nanocomposites

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Lignin‐derived carbon with pyridine N‐B doping and a nanosandwich structure for high and stable lithium storage

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Carbon Energy 2024年第8期6卷 232-247页

作者： Dichao Wu Jiayuan Li Yuying Zhao Ao Wang Gaoyue Zhang Jianchun Jiang Mengmeng Fan Kang Sun Key Lab of Biomass Energy and Material Jiangsu ProvinceNational Engineering Lab for Biomass Chemical UtilizationKey and Open Lab on Forest Chemical EngineeringSFAInstitute of Chemical Industry of Forest ProductsChinese Academy of ForestryNanjingChina Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjingChina School of Energy and Environment Southeast UniversityNanjingChina Department of Chemistry Tsinghua UniversityBeijingChina Fujian Provincial Key Laboratory of Biomass Low‐Carbon Conversion Academy of Advanced Carbon Conversion TechnologyHuaqiao UniversityXiamenChina Chinese Academy of Sciences Xinjiang Lihua Institute of Technology UrumqiChina

Biomass‐derived carbon is a promising electrode material in energy storage ***,how to improve its low capacity and stability,and slow diffusion kinetics during lithium storage remains a *** this research,we propose a“self‐assembly‐template”method to prepare B,N codoped porous carbon(BN‐C)with a nanosandwich structure and abundant pyridinic N‐B *** nanosandwich structure can increase powder density and cycle stability by constructing a stable solid electrolyte interphase film,shortening the Li^(+) diffusion pathway,and accommodating volume expansion during repeated charging/*** abundant pyridinic N‐B species can simultaneously promote the adsorption/desorption of Li^(+)/PF_(6)^(−) and reduce the diffusion *** BN‐C electrode showed a high lithium‐ion storage capacity of above 1140 mAh g^(−1) at 0.05 A g^(−1) and superior stability(96.5% retained after 2000 cycles).Moreover,owing to the synergistic effect of the nanosandwich structure and pyridinic N‐B species,the assembled symmetrical BN‐C//BN‐C full cell shows a high energy density of 234.7Wh kg^(−1),high power density of 39.38 kW kg−1,and excellent cycling stability,superior to most of the other cells reported in the *** the density functional theory simulation demonstrated,pyridinic N‐B shows enhanced adsorption activity for Li^(+) and PF_(6)^(−),which promotes an increase in the capacity of the anode and cathode,***,the relatively lower diffusion barrier of pyridinic N‐B promotes Li^(+) migration,resulting in good rate ***,this study provides a new approach for the synergistic modulation of a nanostructure and an active site simultaneously to fabricate the carbon electrode material in energy storage devices.

关键词： high cycling stability high energy density lithium‐ion batteries pyridinic N‐B species sandwich structure carbon nanosheet

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Double crosslinked biomimetic composite hydrogels containing topographical cues and WAY-316606 induce neural tissue regeneration and functional recovery after spinal cord injury

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Bioactive materials 2023年第6期24卷 331-345页

作者： Xingchang Zhao Xianzhe Lu Kai Li Shiqiang Song Zhaohui Luo Chuanchuan Zheng Chengliang Yang Xiumei Wang Liqiang Wang Yujin Tang Chong Wang Jia Liu Department of Orthopaedics Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina Guangxi Key Laboratory of Basic and Translational Research of Bone and Joint Degenerative Diseases Guangxi Biomedical Materials Engineering Research Center for Bone and Joint Degenerative DiseasesBaiseGuangxiChina Academy of Orthopedics Guangdong ProvinceGuangdong Provincial Key Laboratory of Bone and Joint Degeneration DiseasesThe Third Affiliated Hospital of Southern Medical UniversityGuangzhouChina Youjiang Medical University for Nationalities BaiseGuangxiChina School of Mechanical Engineering Dongguan University of TechnologySongshan LakeDongguanGuangdongChina State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Advanced Materials of Ministry of EducationSchool of Materials Science and EngineeringTsinghua UniversityBeijingChina State Key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghaiChina

Spinal cord injury(SCI)is an overwhelming and incurable disabling condition,for which increasing forms of multifunctional biomaterials are being tested,but with limited *** promising material should be able to fill SCI-induced cavities and direct the growth of new neurons,with effective drug loading to improve the local micro-organism environment and promote neural tissue *** this study,a double crosslinked biomimetic composite hydrogel comprised of acellularized spinal cord matrix(ASCM)and gelatin-acrylated-β-cyclodextrin-polyethene glycol diacrylate(designated G-CD-PEGDA)hydrogel,loaded with WAY-316606 to activate canonical Wnt/β-catenin signaling,and reinforced by a bundle of three-dimensionally printed aligned polycaprolactone(PCL)microfibers,was *** G-CD-PEGDA component endowed the composite hydrogel with a dynamic structure with a self-healing capability which enabled cell migration,while the ASCM component promoted neural cell affinity and *** diffusion of WAY-316606 could recruit endogenous neural stem cells and improve neuronal *** aligned PCL microfibers guided neurite elongation in the longitudinal *** behavior studies further showed that the composite hydrogel could significantly recover the motor function of rats after *** study provides a proficient approach to produce a multifunctional system with desirable physiological,chemical,and topographical cues for treating patients with SCI.

关键词： Spinal cord injury 3D printing PCL oriented fibers WAY-316606 Wnt/β-catenin signaling

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Polyoxometalated metal-organic framework superstructure for stable water oxidation

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Science (New York, N.Y.) 2025年第6745期388卷 430-436页

作者： Yue, Kaihang Lu, Ruihu Gao, Mingbin Song, Fei Dai, Yao Xia, Chenfeng Mei, Bingbao Dong, Hongliang Qi, Ruijuan Zhang, Daliang Zhang, Jiangwei Wang, Ziyun Huang, Fuqiang Xia, Bao Yu Yan, Ya State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China School of Chemistry and Chemical Engineering State Key Laboratory of Materials Processing and Die & Mould Technology Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service Failure Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology (HUST) Wuhan China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing China School of Chemical Sciences University of Auckland Auckland New Zealand National Engineering Laboratory for Methanol to Olefins Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai Synchrotron Radiation Facility Shanghai China Center for High Pressure Science and Technology Advanced Research Shanghai China Key Laboratory of Polar Materials and Devices (MOE) Department of Electronics East China Normal University Shanghai China Multiscale Porous Materials Center Institute of Advanced Interdisciplinary Studies and School of Chemistry and Chemical Engineering Chongqing University Chongqing China College of Energy Material and Chemistry Inner Mongolia Key Laboratory of Low Carbon Catalysis Inner Mongolia University Hohhot China State Key Lab of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai China Center for Next-Generation Energy Materials and School of Chemical Engineering Sungkyunkwan University (SKKU) Seobu-ro Jangan-guGyeonggi-do Suwon South Korea

Stable, nonprecious catalysts are vital for large-scale alkaline water electrolysis. Here, we report a grafted superstructure, MOF@POM, formed by self-assembling a metal-organic framework (MOF) with polyoxometalate (POM). In situ electrochemical transformation converts MOF into active metal (oxy)hydroxides to produce a catalyst with a low overpotential of 178 millivolts at 10 milliamperes per square centimeter in alkaline electrolyte. An anion exchange membrane water electrolyzer incorporating this catalyst achieves 3 amperes per square centimeter at 1.78 volts at 80°C and stable operation at 2 amperes per square centimeter for 5140 hours at room temperature. In situ electrochemical spectroscopy and theoretical studies reveal that the synergistic interactions between metal atoms create a fast electron-transfer channel from catalytic iron and cobalt sites, nickel, and tungsten in the polyoxometalate to the electrode, stabilizing the metal sites and preventing dissolution.

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具有优异热稳定性和溶剂稳定性的快锂离子导体—锆基氧氯化物固态电解质

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Science China materials 2023年第8期66卷 3123-3128页

作者：李冰李玉涛张洪申仵亭亭郭思杰曹安民 CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Beijing Frontier Research Center on Clean Energy Huairou DivisionInstitute of PhysicsChinese Academy of SciencesBeijing 101400China National Engineering Research Center for Advanced Polymer Processing Technology Key Laboratory of Advanced Material Processing&Mold(Ministry of Education)Zhengzhou UniversityZhengzhou 450002China

成本低廉的锂离子导体氯化物固态电解质Li_(2)ZrCl_(6),属于三方晶系,可在4.2 V下保持稳定,与高压正极材料具有良好的兼容性.然而,相对较低的室温离子电导率、较差的化学稳定性和热稳定性等缺点阻碍了它在全固态电池中的进一步发展.基于... 详细信息

成本低廉的锂离子导体氯化物固态电解质Li_(2)ZrCl_(6),属于三方晶系,可在4.2 V下保持稳定,与高压正极材料具有良好的兼容性.然而,相对较低的室温离子电导率、较差的化学稳定性和热稳定性等缺点阻碍了它在全固态电池中的进一步发展.基于此,我们利用Li_(2)O,ZrCl_(4)和LiCl合成了新型氧氯化物固态电解质,并通过O^(2−)对Cl^(−)的取代来优化固态电解质的性能.结果表明增加Li_(2)O的含量会降低三方相Li_(2)ZrCl_(6)的结晶度,且诱导单斜结构的产生.新合成的Li_(2.22)Zr_(1.11)Cl_(5.33)O_(0.67)室温电导率可到10^(−3)S cm^(−1).此外,Li_(2)O的加入能够提高固态电解质的热稳定性和溶剂稳定性.固态电解质Li_(2.22)Zr_(1.11)Cl_(5.33)O_(0.67)良好的离子电导率及稳定性使得Li–In/LiCoO_(2)全固态电池具有稳定的循环性能.

关键词：固态电解质锂离子导体全固态电池室温电导率正极材料离子电导率三方晶系化学稳定性

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Self-Healing Liquid Metal Magnetic Hydrogels for Smart Feedback Sensors and High-Performance Electromagnetic Shielding

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Nano-Micro Letters 2023年第6期15卷 112-125页

作者： Biao Zhao Zhongyi Bai Hualiang Lv Zhikai Yan Yiqian Du Xiaoqin Guo Jincang Zhang Limin Wu Jiushuai Deng David Wei Zhang Renchao Che School of Microelectronics Fudan UniversityShanghai 2000433People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Key Laboratory of Separation and Processing of Symbiotic‑Associated Mineral Resources in Non‑Ferrous Metal Industry School of Chemical&Environmental EngineeringChina University of Mining&Technology(Beijing)Beijing 100083People’s Republic of China Institute of Optoelectronics Fudan UniversityShanghai 200433People’s Republic of China Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou 450046HenanPeople’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China Inner Mongolia University Hohhot 010021People’s Republic of China

Hydrogels exhibit potential applications in smart wearable devices because of their exceptional sensitivity to various external ***,their applications are limited by challenges in terms of issues in biocompatibility,custom shape,and ***,a conductive,stretchable,adaptable,self-healing,and biocompatible liquid metal GaInSn/Ni-based composite hydrogel is developed by incorporating a magnetic liquid metal into the hydrogel framework through crosslinking polyvinyl alcohol(PVA)with sodium *** excellent stretchability and fast self-healing capability of the PVA/liquid metal hydrogel are derived from its abundant hydrogen binding sites and liquid metal ***,owing to the magnetic constituent,the PVA/liquid metal hydrogel can be guided remotely using an external magnetic field to a specific position to repair the broken wires with no need for manual *** composite hydrogel also exhibits sensitive deformation responses and can be used as a strain sensor to monitor various body ***,the multifunctional hydrogel displays absorption-dominated electromagnetic interference(EMI)shielding *** total shielding performance of the composite hydrogel increases to~62.5 dB from~31.8 dB of the pure PVA hydrogel at the thickness of 3.0 *** proposed bioinspired multifunctional magnetic hydrogel demonstrates substantial application potential in the field of intelligent wearable devices.

关键词： EMI shielding Liquid metal Hydrogel Self-healing properties Strain sensor Magnetic patterning

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A Hierarchical Helical Carbon Nanotube Fiber Artificial Ligament

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advanced Fiber materials 2023年第5期5卷 1549-1551页

作者： Chunxue Li Ruilong Jia Yingkui Yang Guangfu Liao College of Ecological Environment and Urban Construction Fujian University of TechnologyFuzhou 350118China The Key Research Laboratory of Benefiting Qi for Acting Blood Circulation Method to Treat Multiple Sclerosis of State Administration of Traditional Chinese Medicine/Research Center of Neurobiology Shanxi University of Chinese MedicineJinzhong 030619People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China College of Material Engineering Fujian Agriculture and Forestry UniversityFuzhou 350002China

For the optimal functional recovery of force-transmitting connective tissues,obtaining grafts that are mechanically robust and integrating them with host bone effectively to tolerate high loads during violent joint motions is both crucial and *** research proposes that a hierarchical helical carbon nanotube fiber,which has the considerably high mechanical strength,and can integrate with the host bone and restore movement in animals,is a very promising artificial *** above research marks a significant development in artificial ligament via the innovative utilization of hierarchical helical carbon nanotube fiber.

关键词： Hierarchical helical carbon nanotube fiber Artificial ligament Mechanical strength Large animal models

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Continuous Fabrication of Core-Sheath Fiber for Strain Sensing and Self-Powered Application

SSRN

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SSRN 2023年

作者： Zheng, Guoqiang Zhong, Junpeng Chen, Rongrui Shan, Tingting Peng, Fei Qiu, Mingfu Sun, Zhonghao Ren, Kunlun Ning, Chuan Dai, Kun Liu, Chuntai Shen, Changyu School of Materials Science and Engineering Key Laboratory of Material Processing and Mold Ministry of Education National Engineering Research Center for Advanced Polymer Processing Technology School of Physics and Microelectronics Zhengzhou University Zhengzhou450000 China

Fiber-based sensor based on the core-sheath structure has drawn increasing attention in the strain sensing and self-powered fields because of its various advantages (e.g., lightweight, small size, flexibility and ease of weavability into soft textile, etc.). However, it still has been challenging to continuously fabricate core-sheath fiber with good interfacial interaction. Herein, a core-sheath fiber was continuously fabricated by melt co-extrusion molding method, whose sheath layer and core layer are respectively pure polystyrene polybutadiene polystyrene (SBS) and SBS/multi-walled carbon nanotubes (SBS/MWCNTs) composite. In view of this, exhibits good compatibility occurs between core layer and sheath layer because they share the same SBS phase. Moreover, with the help of sheath layer, core layer can be effectively prevented the environmental damage. Fiber strain sensor based on such core-sheath fiber exhibits a higher sensitivity (i.e., [[EQUATION]] = 106341), wider working range (strain of 0-200%) and shorter response time (50 ms), which can further perform underwater communication and underwater motion monitoring. Furthermore, based on such core-sheath fiber, fiber triboelectric generator (F-TENG) and textile triboelectric generator (T-TENG) have been successfully developed and they can respectively serve as self-powered bionic whisker (SPBW) and mechanical energy harvester (MEH). This study provides a facile, low-cost, continuous and environmentally friendly method to fabricate core-sheath fiber, paving a new pathway to develop fiber with strain sensing and self-powered sensing performance. © 2023, The Authors. All rights reserved.

关键词： Textiles

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Polymersome formation by solvent annealing-induced structural reengineering under 3D soft confinement

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Nano Research 2021年第12期14卷 4644-4649页

作者： Xi Mao Hao Li Jinwoo Kim Shuai Deng Renhua Deng Bumjoon J.Kim Jintao Zhu Key Laboratory of Material Chemistry for Energy Conversion and Storage of Ministry of Education(HUST) and State Key Laboratory of Materials Processing and Die&Mold TechnologySchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan430074China Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon34141Republic of Korea

A solvent annealing-induced structural reengineering approach is exploited to fabricate polymersomes from block copolymers that are hard to form vesicles through the traditional solution self-assembly *** specifically,polystyrene-b-poly(4-vinyl pyridine)(PS-b-P4VP)particles with sphere-within-sphere structure(SS particles)are prepared by three-dimensional(3D)soft-confined assembly through emulsion-solvent evaporation,followed by 3D soft-confined solvent annealing upon the SS particles in aqueous dispersions for structural engineering.A water-miscible solvent(e.g.,THF)is employed for annealing,which results in dramatic transitions of the assemblies,e.g.,from SS particles to *** approach works for PS-b-P4VP in a wide range of block ***,this method enables effective encapsulation/loading of cargoes such as fluorescent dyes and metal nanoparticles,which offers a new route to prepare polymersomes that could be applied for cargo release,diagnostic imaging,and nanoreactor,etc.

关键词： polymersome block copolymer three-dimensional(3D)confinement self-assembly solvent annealing

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