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Pressure-controlled synergy between dehydrogenation and densification in TiH2 sintering

Journal of the European Ceramic Society 2025年第14期45卷

作者： Hu, Tianxiao Lin, Mengting Zou, Ji Wang, Weimin Ji, Wei Fu, Zhengyi Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Titanium hydride (TiH2) ceramics have become key high-performance hydrogen storage materials. However, the sintering of TiH2 faces significant challenges due to the low temperature of dehydrogenation reaction (300–800 °C). In this study, high-pressure spark plasma sintering (HPSPS) technique was employed to successfully realize low-temperature high-density preparation by suppressing dehydrogenation and regulating densification kinetics under a high pressure (200 MPa). Under the optimized conditions (750 °C, 200 MPa, and 10 min), a fully dense single face-centered cubic (FCC) δ-Ti(H) phase bulk material was fabricated. The initial dehydrogenation temperature of samples fabricated by high-pressure spark plasma sintering (HPSPS) was higher than the dehydrogenation temperature of powder. Mechanistic analyses showed that high pressure inhibited hydrogen escape by compressing pores while promoting particle plastic flow and interfacial bonding. Increasing holding time from 5 to 10 min enhanced diffusion-dominated densification but exacerbated dehydrogenation-induced porosity under low-pressure conditions. The study shows that high pressure compaction can alleviate the contradiction between traditional high temperature densification and low temperature decomposition of TiH2, and offers a new strategy for the efficient densification of materials for low temperature decomposition. © 2025 Elsevier Ltd

关键词： Densification

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Multifunctional Flexible Electromagnetic Interference Shielding Agnws@Pet/Pa Composite Nonwovens with Excellent Joule Heating Performances

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SSRN 2023年

作者： Lu, Ying Cheng, Ying Liu, Qiongzhen Wei, Wei Yang, Liyan Wu, Yi Piao, Longhai Key Laboratory of Textile Fiber and Products Ministry of Education Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China Department of Chemistry Kongju National University Chungnam32588 Korea Republic of

The development of multifunctional textiles is essential for applications of wearable portable electronics, artificial intelligence, military, healthcare, and communication industry. Herein, an asymmetric multifunctional flexible conductive AgNWs@PET/PA composite nonwoven with excellent EMI shielding and effective joule heating performances is proposed by depositing a thin AgNW network on a PET/PA nonwoven using a facile and scalable spray-coating approach. Due to the high air-pressure force and the hydrogen bonds between AgNWs and PET/PA matrix, AgNWs are tightly deposited on the surface of the nonwoven without adhesive and overlapped with each other to form an effective network. With a low content of 6 wt% AgNWs, the EMI shielding efficiency of the composite nonwoven can reach 41.19 dB in the X-band, which is due to the multiple internal reflection and absorption of the incident waves by the conductive AgNWs network as well as the porous structure of the nonwoven. Moreover, the AgNWs@PET/PA composite nonwoven shows excellent joule heating performance from room temperature to 115.5 ℃ at a low applied voltage of 2.5 V in seconds. Furthermore, the addition of reversible thermochromic inks further verified the excellent joule heating performance of the composite nonwovens and provide a possibility for the preparation of visual temperature monitoring intelligent clothing. Therefore, the scalable AgNWs@PET/PA composite nonwovens are considered promising alternatives in a wide range of applications in electromagnetic shielding and thermal management. © 2023, The Authors. All rights reserved.

关键词： Electromagnetic pulse

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Recent progress on surface chemistryⅡ:Property and characterization

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Chinese Chemical Letters 2025年第1期36卷 8-57页

作者： Xin Li Zhen Xu Donglei Bu Jinming Cai Huamei Chen Qi Chen Ting Chen Fang Cheng Lifeng Chi Wenjie Dong Zhenchao Dong Shixuan Du Qitang Fan Xing Fan Qiang Fu Song Gao Jing Guo Weijun Guo Yang He Shimin Hou Ying Jiang Huihui Kong Baojun Li Dengyuan Li Jie Li Qing Li Ruoning Li Shuying Li Yuxuan Lin Mengxi Liu Peinian Liu Yanyan Liu Jingtao Lü Chuanxu Ma Haoyang Pan JinLiang Pan Minghu Pan Xiaohui Qiu Ziyong Shen Qiang Sun Shijing Tan Bing Wang Dong Wang Li Wang Lili Wang Tao Wang Xiang Wang Xingyue Wang Xueyan Wang Yansong Wang Yu Wang Kai Wu Wei Xu Na Xue Linghao Yan Fan Yang Zhiyong Yang Chi Zhang Xue Zhang Yang Zhang Yao Zhang Xiong Zhou Junfa Zhu Yajie Zhang Feixue Gao Yongfeng Wang Center for Carbon-based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices School of ElectronicsPeking UniversityBeijing 100871China Spin-X Institute School of MicroelectronicsSouth China University of TechnologyGuangzhou 511442China School of Materials and Energy Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage DevicesGuangdong University of TechnologyGuangzhou 510006China Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China i-Lab CAS Key Laboratory of Nanophotonic Materials and DevicesSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced MaterialsJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts and TelecommunicationsNanjing 210023China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Institute of Physics&University of Chinese Academy of Sciences Beijing 100190China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Chemistry Beijing Normal UniversityBeijing 100875China Beijing National Laboratory for Molecular Sciences(BNLMS) College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China School

Surface with well-defined components and structures possesses unique electronic,magnetic,optical and chemical *** a result,surface chemistry research plays a crucial role in various fields such as catalysis,energy,materials,quantum,and *** science mainly investigates the correspondence between surface property and *** probe microscopy(SPM)techniques are important tools to characterize surface properties because of the capability of atomic-scale imaging,spectroscopy and manipulation at the single-atom *** this review,we summarize recent advances in surface electronic,magnetic and optical properties characterized mainly by SPM-based *** focus on elucidating theπ-magnetism in graphene-based nanostructures,construction of spin qubits on surfaces,topology properties of surface organic structures,STM-based light emission,tip-enhanced Raman spectroscopy and integration of machine learning in SPM studies.

关键词： Surface chemistry Scanning probe microscopy π-Magnetism Spin qubits Tip-enhanced Raman spectroscopy

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Field effect transistor-based tactile sensors: From sensor configurations to advanced applications

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InfoMat 2023年第1期5卷 1-61页

作者： Jian Wang Shuyan Xu Congcong Zhang Ailing Yin Mingyuan Sun Hongru Yang Chenguo Hu Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongUniversity of JinanJinanPeople's Republic of China Department of Applied Physics State Key Laboratory of Power Transmission Equipment&System Security and New TechnologyChongqing UniversityChongqingPeople's Republic of China Department of Physics School of Physical Science and TechnologyUniversity of JinanJinanPeople's Republic of China State key Laboratory of Crystal Materials Shandong UniversityJinanPeople's Republic of China

The past several decades have witnessed great progress in high-performance field effect transistors(FET)as one of the most important electronic *** the same time,due to their intrinsic advantages,such as multiparameter accessibility,excellent electric signal amplification function,and ease of large-scale manufacturing,FET as tactile sensors for flexible wear-able devices,artificial intelligence,Internet of Things,and other fields to per-ceive external stimuli has also attracted great attention and become a significant field of general *** importantly,FET has a unique three-terminal structure,which enables its different components to detect external mechanics through different sensing *** one hand,it provides an important platform to shed deep insights into the underlying mechanisms of the tactile *** the other hand,these properties could in turn endow excellent components for the construction of tactile matrix sensor arrays with high *** special emphasis on the configuration of FETs,this review classified and summarized structure-optimized FET tactile sensors with gate,dielectric layer,semiconductor layer,and source/drain electrodes as sensing active components,*** working principles and the state-of-the-art protocols in terms of high-performance tactile sensors are detail discussed and highlighted,the innovative pixel distribution and integration analysis of the transistor sensor matrix array concerning flexible electronics are also *** hope that the introduction of this review can provide some inspiration for future researchers to design and fabricate high-performance FET-based tactile sensor chips for flexible electronics and other fields.

关键词： field-effect transistor flexible electronics tactile matrix sensor array tactile sensors

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Capacity Optimization of Hybrid Energy Storage System Based on Hysteresis Energy Management Strategy

Capacity Optimization of Hybrid Energy Storage System Based ...

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IEEE Annual Southern Power Electronics Conference (SPEC)

作者： Wenlong Yang Minwang Wang Wenchao Zhu Changjun Xie Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China School of Automation Wuhan University of Technology Wuhan China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China

ISBN: (数字)9798350351156

ISBN: (纸本)9798350351163

This study improves the hydrogen energy module of the hydrogen-electric coupling system and proposes a hybrid hydrogen storage system structure based on Proton Exchange Membrane Electrolyzer (PEMEL), Alkaline Electrolyzer (ALKEL), and Proton Exchange Membrane Fuel Cell (PEMFC). Considering component startup and shutdown characteristics, dynamic operation, component degradation, and their impact on system reliability, a novel triple-hysteresis energy management strategy is proposed. The comprehensive optimization objectives include minimizing the Levelized Cost of Energy (LCOE), the Loss of Power Supply Probability (LPSP), and the Wind-Solar Curtailment to Load Energy Ratio (WSCLR). The optimal capacity configuration of the hybrid renewable energy system under the new energy management strategy was determined. The performance of the proposed strategy was analyzed and compared over short-term (1 year) and long-term (20 years) operations. The results indicate that the WSCLR of the ALKEL and PEMEL coupled structure is reduced by 83.3% compared to a single ALKEL system, and the LCOE and WSCLR are reduced by 2.1% and 3.5%, respectively, compared to a single PEMEL system. Compared to traditional energy management strategies, the new energy management strategy can reduce the LCOE, WSCLR, and LPSP by 2.7%, 45.0%, and 79.1%, respectively, over a 20-year long-term operation.

关键词： Protons Renewable energy sources System performance Hydrogen Lithium batteries Resource management Reliability Energy management Optimization Hysteresis

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Enhanced photoresponse of Ti0_(2)/MoS_(2)heterostructure phototransistors by the coupling of interface charge transfer and photogating

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Nano Research 2021年第4期14卷 982-991页

作者： Bingxu Liu Yinghui Sun Yonghuang Wu Kai Liu Huanyu Ye Fangtao Li Limeng Zhang Yong Jiang Rongming Wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceSchool of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

Two-dimensional(2D)MoS_(2)with appealing physical properties is a promising candidate for next-generation electronic and optoelectronic devices,where the ultrathin MoS_(2)is usually laid on or gated by a dielectric oxide *** oxide/MoS_(2)interfaces widely existing in these devices have significant impacts on the carrier transport of the MoS_(2)channel by diverse interface *** design of the oxide/MoS_(2)interfaces would provide an effective way to break through the performance limit of the 2D devices but has yet been well ***,we report a high-performance MoS_(2)-based phototransistor with an enhanced photoresponse by interfacing few-layer MoS_(2)with an ultrathin Ti0_(2)*** Ti0_(2)is deposited on MoS_(2)through the oxidation of an e-beam-evaporated ultrathin Ti *** a visible-light illumination,the fabricated Ti0_(2)/MoS_(2)phototransistor exhibits a responsivity of up to 2,199 A/W at a gate voltage of 60 V and a detectivity of up to 1.67×10^(13)Jones at a zero-gate voltage under a power density of 23.2μW/mm^(2).These values are 4.0 and 4.2 times those of the pure MoS_(2)*** significantly enhanced photoresponse of Ti0_(2)/MoS_(2)device can be attributed to both interface charge transfer and photogating *** results not only provide valuable insights into the interactions at Ti0_(2)/MoS_(2)interface,but also may inspire new approach to develop other novel optoelectronic devices based on 2D layered materials.

关键词： MoS_(2) heterojunction photodetector charge injection photocurrent

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Preparation and Molecular Simulation of Hyper-Dispersant Modified Bn Filled Natural Rubber Thermally Conductive Composite

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SSRN 2024年

作者： Wang, Zhen Li, Zhenlu Lin, Xinfeng Zheng, Long Li, Ziwei Lu, Shaorong Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Ministry of Education School of Material Science and Engineering Guilin University of Technology Guilin541004 China Hubei Key Laboratory for New Textile Materials and Applications College of Materials Science and Engineering Wuhan Textile University Wuhan430200 China Guangxi Colleges Universities Key Laboratory of Natural and Biomedical Polymer Materials Guilin University of Technology School of Material Science and Engineering Guilin University of Technology Guilin541004 China

Non-covalent modification of fillers with hyperdispersants in composite processing avoids destroying the regular structure of the filler and is simpler and easier to operate than ordinary surface modification methods. A novel hyperdispersant, GI-g-PHA, was synthesized by esterification of poly12-hydroxystearic acid (PHA) and glycerol (GI) to improve the thermal conductivity (TC) and tensile properties of natural rubber (NR)/boron nitride (BN) composites. After the addition of 5 wt% hyperdispersant, the thermal conductivity of 20 vol% and 25 vol% BN composites was 0.965 W/mK and 1.364 W/mK, respectively, which was 9.6 and 13.6 times higher than that of NR matrix (0.1 W/mK). Molecular dynamics simulations showed an increase in molecular binding energy and a decrease in free volume fraction after the addition of dispersant, which provided a microscopic explanation for the change in compatibility. This study provides a way to prepare polymer matrix composites with high thermal conductivity and high strength. © 2024, The Authors. All rights reserved.

关键词： Molecular dynamics

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Preparation and Molecular Simulation of Hyper-Dispersant Modified Bn Filled Natural Rubber Thermally Conductive Composite

SSRN

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SSRN 2024年

作者： Wang, Zhen Li, Ziwei Li, Zhenlu Lin, Xinfeng Zheng, Long Lu, Shaorong Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Ministry of Education School of Material Science and Engineering Guilin University of Technology Guilin541004 China Hubei Key Laboratory for New Textile Materials and Applications College of Materials Science and Engineering Wuhan Textile University Wuhan430200 China Guangxi Colleges Universities Key Laboratory of Natural and Biomedical Polymer Materials Guilin University of Technology School of Material Science and Engineering Guilin University of Technology Guilin541004 China

关键词： Molecular dynamics

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双功能Nb-N-C原子分散催化剂用于水系锌-空气电池驱动CO_(2)还原

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Science China materials 2023年第3期66卷 1013-1023页

作者：高三双王天玮靳梦梦张书胜刘倩胡广志杨慧罗俊刘熙俊 Institute for New Energy Materials and Low-Carbon Technologies Tianjin Key Lab for Photoelectric Materials&DevicesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials and Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China College of Chemistry Zhengzhou UniversityZhengzhou 450000China Institute for Advanced Study Chengdu UniversityChengdu 610106China Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental Science Yunnan UniversityKunming 650504China Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518110China

设计廉价和高效的双功能催化剂应用于CO_(2)还原和O_(2)还原反应(CO_(2)RR和ORR)是实现碳中和的理想选择.因此,本文研制出铌原子分散固定在氮掺杂有序介孔碳(Nb-N-C)上的双功能CO_(2)RR和ORR催化剂用于锌-空气电池(ZAB)自驱动CO_(2)RR.... 详细信息

设计廉价和高效的双功能催化剂应用于CO_(2)还原和O_(2)还原反应(CO_(2)RR和ORR)是实现碳中和的理想选择.因此,本文研制出铌原子分散固定在氮掺杂有序介孔碳(Nb-N-C)上的双功能CO_(2)RR和ORR催化剂用于锌-空气电池(ZAB)自驱动CO_(2)RR.得益于高铌原子利用率和有序介孔结构,Nb-N-C催化剂展现出高达90%的CO法拉第效率,ORR的半波电位活性为0.84 V,ZAB的峰值功率活性为115.6 mW cm-2.此外,采用两个串联的ZABs单元作为自供能CO_(2)RR系统的电源,能够连续将C O_(2)转化为C O.该自供能系统前10小时的C O平均产率为3.75μmol h-1mg-1cat.理论计算表明,铌原子分散固定在氮掺杂的碳上形成Nb–N配位键,从而有效地降低CO_(2)RR的决速中间体*COOH和ORR的决速中间体*O的生成能垒.

关键词：有序介孔碳配位键还原反应双功能催化剂半波电位原子利用率氮掺杂能垒

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Electrochemically and chemically in-situ interfacial protection layers towards stable and reversible Zn anodes

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Science Bulletin 2025年第1期70卷 104-124页

作者： Yuqing Yang Liping Qin Qiong He Chengjie Yin Yongpeng Lei Shuquan Liang Guozhao Fang School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South UniversityChangsha 410083China College of Biological and Chemical Engineering Guangxi University of Science and TechnologyNanning 545006China School of Chemical and Blasting Engineering Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China National Energy Metal Resources and New Materials Key Laboratory Central South UniversityChangsha 410083China

Aqueous zinc metal batteries(AZMBs)have received widespread attention for large-scale sustainable energy storage due to their low toxicity,safety,***,the technology and industrialization of AZMBs are greatly plagued by issues of Zn anode such as persistent dendrites and parasitic side reactions,resulting in rapid capacity degradation or battery *** or chemically in-situ interfacial protection layers have very good self-adaption features for stability and reversibility of Zn anodes,which can also be well matched to current battery ***,the in-situ interfacial strategies are far from the practical design for effective Zn ***,a targeted academic discussion that serves the development of this field is very ***,the comprehensive insights on electrochemically and chemically in-situ interfacial protection layers for Zn anode were proposed in this *** showcased a systematic summary of research advances,followed by detailed discussions on electrochemically and chemically in-situ interfacial protection *** importantly,several crucial issues facing in-situ interfacial protection strategies have been further put *** final section particularly highlighted a systematic and rigorous scheme for precise designing highly stable and reversible in-situ interface for practical zinc anodes.

关键词： In-situ strategy Interfacial layer Zn anode Solid electrolyte interphase Aqueous zinc metal batteries

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