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Hierarchical Ni-plated melamine sponge and MXene film synergistically supported phase change materials towards integrated shape stability,thermal management and electromagnetic interference shielding

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Journal of Materials Science & Technology 2023年第1期132卷 132-143页

作者： ziling cheng Guojun Chang Bai Xue Lan Xie Qiang Zheng State Key Laboratory of Public Big Data Guizhou UniversityGuiyang 550025China Department of Polymer Materials and Engineering College of Materials and MetallurgyGuizhou UniversityGuiyang 550025China National Engineering Research Center for Compounding and Modification of Polymer Materials National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane ProcessesGuiyang 550014China College of Polymer Science and Engineering Zhejiang UniversityHangzhou 310000China

Along with the integrated and miniaturized development of advanced electronic devices,phase change materials(PCMs)simultaneously with efficient thermal management and high electromag-netic interference(EMI)shielding effectiveness(SE)are ungently ***,the shape-stabilized MXene/Ni-platted melamine sponge/Regenerated cellulose/Graphene nanoplate/Polyethylene glycol(MX/Ni@MS/RCG/PEG)composite PCMs comprising hierarchical Ni@MS/RCG and MXene film were fabricated via a facile encapsulation *** Ni@MS/RCG hybrid aerogel was prepared by electroless plating and sol-gel methods,and MXene film was obtained using vacuum-assisted filtra-tion *** synergistic effect of conductive Ni@MS/RCG networks and tight MXene film endows MX/Ni@MS/RCG/PEG composite PCMs with good shape stability,high cyclic reliability,large latent heat of phase change(154.3 J g^(–1)),excellent thermal conductivity(TC,0.47 W m^(–1)K^(–1))and favorable EMI shield-ing performance(32.7 dB).The TC of acceptable 0.47 W m^(–1)K^(–1)is observed for MX/Ni@MS/RCG-5/PEG at a rather low GNP content of merely 0.39 wt%.In addition,the temperature variation of MX/Ni@MS/RCG-5/PEG is a lot faster than that of pure PEG in the heating/cooling process,revealing the remarkable energy storage and release efficiency for the composite *** investigation has taken an important step to-wards shape-stabilized composite PCMs with both effective thermal management and high EMI SE for promising applications in electronic packaging and advanced energy.

关键词： Phase change material Thermal management Electromagnetic interference shielding Shape stability Encapsulation

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Directional Electromagnetic Interference Shielding Based on Step-Wise Asymmetric Conductive Networks

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Nano-Micro Letters 2022年第1期14卷 262-277页

作者： Bai Xue Yi Li ziling cheng Shengdu Yang Lan Xie Shuhao Qin Qiang Zheng Department of Polymer Materials and Engineering College of Materials and MetallurgyGuizhou UniversityGuiyang 550025People’s Republic of China National Engineering Research Center for Compounding and Modification of Polymer Materials National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane ProcessesGuiyang 550014People’s Republic of China College of Polymer Science and Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024People’s Republic of China

Some precision electronics such as signal transmitters need to not only emit effective signal but also be protected from the external electromagnetic(EM)***,directional electromagnetic interference(EMI)shielding materials(i.e.,when the EM wave is incident from different sides of the sample,the EMI shielding effectiveness(SE)is rather different)are strongly required;unfortunately,no comprehensive literature report is available on this research ***,Nicoated melamine foams(Ni@MF)were obtained by a facile electroless plating process,and multiwalled carbon nanotube(CNT)papers were prepared via a simple vacuum-assisted self-assembly ***,step-wise asymmetric poly(butylene adipate-co-terephthalate)(PBAT)composites consisting of loose Ni@MF layer and compact CNT layer were successfully fabricated via a facile solution encapsulation *** step-wise asymmetric structures and electrical conductivity endow the Ni@MF/CNT/PBAT composites with unprecedented directional EMI shielding *** the EM wave is incident from Ni@MF layer or CNT layer,Ni@MF-5/CNT-75/PBAT exhibits the total EMI SE(SET)of 38.3 and 29.5 dB,respectively,which illustrates theΔSET of 8.8 *** work opens a new research window for directional EMI shielding composites with step-wise asymmetric structures,which has promising applications in portable electronics and next-generation communication technologies.

关键词： Solution encapsulation Step-wise asymmetry Directional electromagnetic interference shielding Electrical conductivity Vacuum-assisted self-assembly

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专业孵化器与综合孵化器的孵化效益对比研究

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科技管理研究 2020年第11期40卷 23-28页

作者：刘祯段俊虎程子玲马宁朱婧科技部火炬高技术产业开发中心北京100045 广东省科学技术情报研究所广东广州510033

基于科技统计相关数据,对比分析专业孵化器和综合孵化器在孵化绩效、经济社会效益、投入产出效益方面的情况。研究表明,专业孵化器的孵化绩效、对区域经济的贡献更好,但目前来看其自身运营的投入产出效益不佳。因此,需要政策大力引导和... 详细信息

基于科技统计相关数据,对比分析专业孵化器和综合孵化器在孵化绩效、经济社会效益、投入产出效益方面的情况。研究表明,专业孵化器的孵化绩效、对区域经济的贡献更好,但目前来看其自身运营的投入产出效益不佳。因此,需要政策大力引导和扶持专业孵化器的发展,同时,孵化器自身也需提升专业孵化能力和意识。

关键词：专业孵化器综合孵化器孵化绩效经济社会效益投入产出效益发展建议

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列车振动荷载下盾构隧道结构动态响应研究

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地下空间与工程学报 2023年第S2期19卷 901-907,919页

作者：刘继红衣忠强田龙岗戚家南程子凌中铁九局集团第一建设有限公司江苏苏州215538 东南大学土木工程学院南京211189 东南大学蒙纳士大学苏州联合研究生院江苏苏州215123

盾构隧道衬砌在地铁列车长期振动荷载作用下产生各类动态响应,研究该动态响应对保障地铁安全运营具有重要意义。通过有限元建立了地铁盾构隧道三维精细化模型,详细模拟了衬砌管片和连接螺栓在列车振动荷载作用下的动应力变化情况。研究... 详细信息

盾构隧道衬砌在地铁列车长期振动荷载作用下产生各类动态响应,研究该动态响应对保障地铁安全运营具有重要意义。通过有限元建立了地铁盾构隧道三维精细化模型,详细模拟了衬砌管片和连接螺栓在列车振动荷载作用下的动应力变化情况。研究表明:列车振动荷载对盾构隧道衬砌的影响主要集中在衬砌封底块附近,该区域动应力可达衬砌其他部位的10倍以上;管片动应力受车速影响很小,但螺栓动应力与车速呈现正相关性;列车轴重对管片动应力影响巨大,管片动应力峰值与轴重近似呈正比例关系,螺栓动应力则与轴重呈现一定的正相关性;在周期性列车振动荷载的长期作用下,带初始裂缝衬砌管片的裂缝扩展呈现出混合型断裂特征,并最终发展成为张拉型局部裂缝。

关键词：盾构隧道列车振动荷载衬砌管片动应力裂缝扩展

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“中国草”苎麻产业急剧萎缩需联合发力助推传统特色产业转型升级

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中国纤检 2024年第9期 111-112页

作者：徐贵勇刘家铭程子玲罗俐韩思雨陈玉峰中国纤维质量监测中心北京100007

本文针对近年来我国苎麻产业不断萎缩的现实情况,系统分析制约产业高质量发展的主要瓶颈,并从市场监管部门和纤维质量监测机构角度提出推动苎麻产业转型升级的意见建议。

关键词：苎麻产业高质量发展转型升级

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非棉纤维公证检验人员管理办法解读

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中国纤检 2024年第5期 50-53页

作者：刘家铭徐贵勇罗俐程子玲韩思雨陈玉峰中国纤维质量监测中心北京100007

本文对《非棉纤维公证检验人员管理办法(试行)》的制定背景、依据和具体条款内容进行说明,为各方实际应用提供参考。

关键词：非棉纤维公证检验人员管理

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非棉纤维公证检验实验室管理办法解读

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中国纤检 2024年第4期 32-35页

作者：刘家铭徐贵勇罗俐程子玲韩思雨陈玉峰中国纤维质量监测中心北京100007

本文对《非棉纤维公证检验实验室管理办法(试行)》的制定背景、依据和具体条款内容进行说明,为各方实际应用提供参考。

关键词：非棉纤维公证检验实验室管理

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蓄势赋能促发展,公证检验助力浙江茧丝绸产业提质增效

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中国纤检 2024年第3期 22-25页

作者：王丹涛刘家铭罗俐徐贵勇程子玲韩思雨陈玉峰中国纤维质量监测中心北京10007

浙江是古丝绸之路的起点之一,历史文化底蕴深厚。近年来,浙江茧丝绸行业发展态势良好,产业链完整,形成了多个茧丝绸产业细分集群。以茧丝公证检验为代表的纤维质量监测服务,紧密结合浙江茧丝绸产业发展需求,科学规划检验能力布局,有力... 详细信息

浙江是古丝绸之路的起点之一,历史文化底蕴深厚。近年来,浙江茧丝绸行业发展态势良好,产业链完整,形成了多个茧丝绸产业细分集群。以茧丝公证检验为代表的纤维质量监测服务,紧密结合浙江茧丝绸产业发展需求,科学规划检验能力布局,有力保障了茧丝等天然纤维高质稳定供给。

关键词：公证检验茧丝绸产业提质增效

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Unraveling Electrochemical Stability and Reversible Redox of Y-Doped Li_(2)ZrCl_(6) Solid Electrolytes

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Energy Material Advances 2023年第1期4卷 120-129页

作者： Shuai Chen Chuang Yu Chaochao Wei ziling Jiang Ziqi Zhang Linfeng Peng Shijie cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074P.R.China School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074P.R.China

Lithium halide electrolytes show great potential in constructing high-energy-density solid-state batteries with high-voltage cathode materials due to their high electrochemical stability and wide voltage ***,the high cost and low conductivity of some compositions inhibit their ***,the effect of electronic additives in the cathode mixture on the stability and capacity is ***,the Y3+doping strategy is applied to enhance the conductivity of low-cost Li_(2)ZrCl_(6)*** tailoring the Y^(3+)dopant in the structure,the optimal Li_(2.5)Zr_(0.5)Y_(0.5)Cl_(6)with high conductivity up to 1.19×10^(−3) S cm^(−1) is ***_(2.5)Zr_(0.5)Y_(0.5)Cl_(6)@CNT/Li_(2.5)Zr_(0.5)Y_(0.5)Cl_(6)/Li_(5.5)PS_(4.5)Cl_(1.5)/In-Li solid-state batteries with different carbon nanotube(CNT)contents in the cathode are *** stability and electrochemical performances of the cathode mixture as a function of CNT content are *** cathode mixture containing 2%(wt.)CNT exhibits the highest stability and almost no discharge capacity,while the cathode mixture consisting of Li_(2.5)Zr_(0.5)Y_(0.5)Cl_(6)and 10%(wt.)CNT delivers a high initial discharge capacity of 199.0 mAh g^(−1)and reversible capacities in the following 100 *** characterizations are combined to unravel the working mechanism and confirm that the electrochemical reaction involves the 2-step reaction of Y^(3+)/Zr^(0),Zr^(4+)/Zr^(0),and Cl^(−)/Cl_(x)^(−)in the Li_(2.5)Zr_(0.5)Y_(0.5)Cl_(6)*** work provides insight into designing a lithium halide electrolyte-based cathode mixture with a high ionic/electronic conductive framework and good interfacial stability for solid-state batteries.

关键词： conductivity electrolyte stability

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O-doping strategy enabling enhanced chemical/electrochemical stability of Li_(3)InCl_(6) for superior solid-state battery performance

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Journal of Energy Chemistry 2024年第12期99卷 484-494页

作者： Qiyue Luo Chen Liu Lin Li ziling Jiang Jie Yang Shaoqing Chen Xia Chen Long Zhang Shijie cheng Chuang Yu State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074HubeiChina College of Energy Soochow Institute for Energy and Materials InnovationsJiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006JiangsuChina College of Physics and Energy Fujian Normal UniversityFuzhou 350117FujianChina

Solid-state electrolytes with high oxidation stability are crucial for achieving high power density allsolid-state lithium *** electrolytes are promising candidates due to their outstanding compatibility with cathode materials and high Li^(+)***,the electrochemical stability of chloride electrolytes is still limited,leaving them unsuitable for ultrahigh voltage ***,chemical compatibility issue between sulfide and halide electrolytes affects the electrochemical performance of all-solid-state ***,Li-ion conductor Li_(3+x)InCl_(6-x)O_(x) is designed to address these ***_(3.25)InCl_(5.75)O_(0.25)shows a Li-ion conductivity of 0.90 mS cm^(-1)at room temperature,a high onset oxidation voltage of 3.84 V,fewer by-products at ultrahigh operation voltage,and good chemical compatibility with Li_(5.5)PS_(4.5)Cl_(1.5).The Li_(3.25)InCl_(5.75)O_(0.25)@LiNi_(0.7)Co_(0.1)Mn_(0.2)O_(2)-Li_(3.25)InCl_(5.75)O_(0.25)-VGCF/Li_(3.25)InCl_(5.75)O_(0.25)/Li_(5.5)PS_(4.5)Cl_(1.5)/Li-In battery delivers good electrochemical performances at high operating *** work provides a simple,economical,and effective strategy for designing high-voltage all-solid-state electrolytes.

关键词： Li_(3)InCl_(6) O doping Wide electrochemical window Chemical stability Interfacial stability Superior electrochemical performance

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