检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Li, Peizhao Lu, Haibao Science and Technology on Advanced Composites in Special Environments Laboratory Harbin Institute of Technology Harbin150080 China

Due to the coexistence of two distinct states, namely low-density liquid (LDL) and high-density liquid (HDL), water has a unique liquid-liquid phase transition (LLPT) behavior. However, the underlying mechanism for LLPT is not well understood owing to the complex entanglements of the condensed structures. This study proposes a new topological entanglement model to characterize the LLPTs of LDL and HDL in the metastable water and describe the condensed structures utilizing theoretical models of topological unlink, entanglement and sub-entanglement of the condensed structures. Topological unlinks and topological entangled Hopf links are firstly used to describe the topological nature of the LDL and HDL. Meanwhile, the sub-entanglement is employed to describe the dynamic inter-molecular interactions between LDL and HDL. This model is further extended to establish constitutive relationships among abnormal properties. Finally, effectiveness of the proposed model is verified by molecular dynamics simulations and experimental data reported in literature. © 2023, The Authors. All rights reserved.

关键词： Molecular dynamics

来源：评论

学校读者我要写书评

暂无评论

Electrolyte Engineering for High-Voltage Lithium Metal Batteries

引用

Research 2022年第4期2022卷 781-832页

作者： LiweiDong Shijie Zhong Botao Yuan Yuanpeng Ji Jipeng Liu Yuanpeng Liu Chunhui Yang Jiecai Han Weidong He MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150080China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150080China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150080China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China School of Mechanical Engineering Chengdu UniversityChengdu610106China

High-voltage lithium metal batteries(HVLMBs)have been arguably regarded as the most prospective solution to ultrahigh-density energy storage devices beyond the reach of current ***,the only component inside the HVLMBs in contact with both aggressive cathode and Li anode,is expected to maintain stable electrode/electrolyte interfaces(EEIs)and facilitate reversible Li+***,traditional electrolytes with narrow electrochemical windows fail to compromise the catalysis of high-voltage cathodes and infamous reactivity of the Li metal anode,which serves as a major contributor to detrimental electrochemical performance fading and thus impedes their practical *** stable electrolytes is vital for the further development of ***,optimization principles,design strategies,and future perspectives for the electrolytes of the HVLMBs have not been summarized in *** review first gives a systematical overview of recent progress in the improvement of traditional electrolytes and the design of novel electrolytes for the *** strategies of conventional electrolyte modification,including high concentration electrolytes and CEI and SEI formation with additives,are *** electrolytes including fluorinated,ionic-liquid,sulfone,nitrile,and solid-state electrolytes are also *** addition,theoretical studies and advanced characterization methods based on the electrolytes of the HVLMBs are probed to study the internal mechanism for ultrahigh stability at an extreme *** also foresees future research directions and perspectives for further development of electrolytes in the HVLMBs.

关键词： electrolyte maintain summarized

来源：评论

学校读者我要写书评

暂无评论

Au nanospheres modified boron-doped diamond microelectrode grown via hydrogen plasma etching solid doping source for dopamine detection

引用

Journal of Materials science & technology 2020年第14期47卷 42-46页

作者： Kaili Yao Xiaojun Tan Bing Dai Jie Bai Qiaoyang Sun Wenxin Cao Jiwen Zhao Lei Yang Jiecai Han Jiaqi Zhu National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin150080China

Boron doped diamond(BDD)electrode is a promising electrochemical material for detecting dopamine level in the human’s *** this work,we developed a new doping source-graphite and solid boron oxide powders to synthesize BDD film with microwave plasma chemical vapor deposition,so as to avoid using toxic or corrosive dopants,such as boroethane and *** synthesized BDD film is pinhole free and with high doping density of 8.44×10^20 cm^-3 calculated from the Raman ***,Au nanospheres were decorated on the surface of BDD film to improve electrochemical performance of the BDD *** Au nanoparticles modified BDD electrode demonstrates an excellent electrochemical response,a high sensitivity(in the range of 5μM-1 m M),and a low detection limit(~0.8μM)for detecting dopamine.

关键词： Boron doped diamond Graphite powders Boron oxide powders Optical emission spectroscopy Dopamine

来源：评论

学校读者我要写书评

暂无评论

An Element-Based Peridynamic Model for Elastic and Fracture Analysis of Composite Lamina

引用

Journal of Peridynamics and Nonlocal Modeling 2022年第4期4卷 527-554页

作者： Liu, Shuo Fang, Guodong Liang, Jun Jiang, Xinyu Yan, Xiangqiao Meng, Songhe Science and Technology On Advanced Composites in Special Environment Key Laboratory Harbin Institute of Technology Harbin 150001 China Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China

An element-based peridynamic (EBPD) model for composite lamina is proposed to solve the displacement field, stress field, and crack propagation problems. The continuous change of material properties with the angle, such as the composite lamina with any fiber orientation, can be realized by the EBPD model. The model also defines the non-local stress and non-local strain, which can introduce damage criteria of continuum mechanics. The reducing element scheme is also introduced to improve the computation efficiency. The effectiveness of the model is demonstrated by a series of examples, including the displacement analysis, stress analysis, and crack growth of the composite lamina. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

关键词： Composite lamina Crack growth Element-based Peridynamics

来源：评论

学校读者我要写书评

暂无评论

An extended Euler-Bernoulli beam principle in multi-component metamaterial towards tunable Poisson's ratio

引用

Extreme Mechanics Letters 2025年 77卷

作者： Zhang, Jingyi Liu, Yuheng Lu, Haibao Tao, Ran Science and Technology on Advanced Composites in Special Environments Laboratory Harbin Institute of Technology Harbin150080 China Institute of Advanced Structure Technology Beijing Institute of Technology Beijing100081 China

In this paper, a multi-component mechanical metamaterial was proposed to achieve tunable nominal modulus and Poisson's ratio to extend the potential and practical applications in smart materials and structures. Based on the Euler-Bernoulli beam theory, a universal model was formulated for the multi-component metamaterial to explore the constitutive relationship between the model parameters and mechanical properties. The theoretical model reveals that the Poisson's ratio of the multi-component metamaterial could be quantitatively regulated over a broad range by manipulating the moduli of its constituent components. On this basis, a bi-component metamaterial composed of polylactic acid (PLA) and thermoplastic polyurethane (TPU), featuring distinct temperature-dependent moduli and geometric configurations, was manufactured and exhibited thermally tunable mechanical behavior. Parametric finite element simulations were conducted to investigate the synergistic effect of temperature-dependent moduli and geometric parameters on the stable mechanical behaviors of the bi-component metamaterial, with the results validated by experimental measurements. This study examines the design principle that combines material parameters (temperature-dependent moduli) and structural parameters (geometric parameters) for the multi-component mechanical metamaterial. The methodologies and insights presented in this paper provide new perspectives and technical approaches for the innovative applications of metamaterials in aerospace, biomedical, and microelectronic fields. © 2025 Elsevier Ltd

关键词： Metamaterials

来源：评论

学校读者我要写书评

暂无评论

Polybenzimidazole functionalized electrolyte with Li-wetting and self-fluorination functionalities for practical Li metal batteries

引用

InfoMat 2022年第5期4卷 174-186页

作者： Dongjiang Chen Yuanpeng Liu Chuan Xia Yupei Han Qingwei Sun Xuchang Wang Wei Chen Xian Jian Weiqiang Lv Jianyi Ma Weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbinChina School of Physics University of Electronic Science and Technology of ChinaChengduChina School of Materials and Energy University of Electronic Science and Technology of ChinaChengduChina Institute of Atomic and Molecular Physics Sichuan UniversityChengduSichuanChina

Rough Li plating,low ionic conductivity,and low thermal stability of conventional electrolytes post-primary challenges for achieving reliable high-capacity rechargeable lithium batteries,for which lithiummetal is frequently proposed as themost promising anode *** low-polarity commercial polypropylene/polyethylene separators fail to support the application of high-energy-density Li anodes due to their rigid physicochemical properties and the high reactivity of Li metal,leading to fatal dendrite formation and vigorous exothermic reaction with ***,we develop a Li-wetting,flame-retardant binary polymer electrolyte by functionalizing poly(vinylidene fluoride)(PVDF)separators with nonflammable polybenzimidazole(PBI)to build safe room-temperature solid-state electrolyte membranes.A dendrite-free LiFePO4 cell with the solid polymer electrolyte(SPE)delivers a discharge capacity of 127 mAh g^(-1) at 25℃ with a capacity retention of 87.5%after 500 cycles at 0.5℃(0.15 mA cm^(-2)).Phase-field simulations and density functional theory calculations demonstrate that the negatively charged benzimidazole chains of PBI own superior affinity to lithium bis(trifluoromethanesulfonyl)imide(LiTFSI),and shares overlapping electron density with Li anode,giving rise to accelerated Li^(+)conduction at room temperature and uniform Li electrodeposition at the electrolyte/Li metal *** SPE is also flame-retardant since heat-resistant polytetrafluoroethylene and a dense,heat-blocking graphitized carbon layer are formed in intense heat throughdehydrogenation/fluorination of PVDF under the catalysis of Lewis base imidazole rings and the decomposition of benzimidazole rings in *** such fire-resistant mechanism is ever reported in conventional electrolytes.

关键词： flame-retardant properties Li metal polybenzimidazole solid polymer electrolyte uniform Li deposition

来源：评论

学校读者我要写书评

暂无评论

Two-Dimensional Materials for Highly Efficient and Stable Perovskite Solar Cells

引用

Nano-Micro Letters 2024年第10期16卷 176-212页

作者： Xiangqian Shen Xuesong Lin Yong Peng Yiqiang Zhang Fei Long Qifeng Han Yanbo Wang Liyuan Han State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240People's Republic of China Xinjiang Key Laboratory of Solid State Physics and Devices School of Physical Science and TechnologyXinjiang UniversityUrumqi 830046People's Republic of China Special Division of Environmental and Energy Science College of Arts and SciencesKomaba Organization for Educational ExcellenceUniversity of TokyoTokyo 153-8902Japan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People's Republic of China College of Chemistry Henan Institute of Advanced TechnologyZhengzhou UniversityZhengzhou 450001People's Republic of China Guangxi Key Laboratory of Optical and Electronic Materials and Devices Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of ResourcesSchool of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004People's Republic of China

Perovskite solar cells(PSCs)offer low costs and high power conversion ***,the lack of long-term stability,primarily stemming from the interfacial defects and the sus-ceptible metal electrodes,hinders their practical *** the past few years,two-dimensional(2D)materials(e.g.,graphene and its derivatives,transitional metal dichalcogenides,MXenes,and black phosphorus)have been identified as a promising solution to solving these problems because of their dangling bond-free surfaces,layer-dependent electronic band structures,tunable functional groups,and inherent ***,recent progress of 2D material toward efficient and stable PSCs is summarized,including its role as both interface materials and *** discuss their beneficial effects on perovskite growth,energy level alignment,defect passivation,as well as blocking external *** particular,the unique properties of 2D materials to form van der Waals heterojunction at the bottom interface are ***,perspectives on the further development of PSCs using 2D materials are provided,such as designing high-quality van der Waals heterojunction,enhancing the uniformity and coverage of 2D nanosheets,and developing new 2D materials-based electrodes.

关键词： Perovskite solar cells Two-dimensional materials Interface engineering Van der Waals heterojunction Electrodes

来源：评论

学校读者我要写书评

暂无评论

CONFIGURATION ANALYSIS OF HYBRID METAL BI-STABLE composites 23

CONFIGURATION ANALYSIS OF HYBRID METAL BI-STABLE COMPOSITES

引用

23rd International Conference on Composite Materials, ICCM 2023

作者： Guo, Xiangwei Dong, Na Dai, Fuhong National Key Laboratory of Science and Technology on Advanced Composites in Special Environment Harbin Institute of Technology Harbin150000 China Harbin Institute of Pharmaceutical Sciences ZBD Pharmaceutical Harbin150000 China

The bi-stable cylindrical shell is a thin-walled composite structure with a specific angle layup, which has two stable configurations and can maintain the unfolded state and the curled state without external constraints. This structure has the advantages of a simple curling storage device, a reliable unfolding process, and high storage efficiency, and has great application potential in space-deployable structures. In this paper, based on bi-stable composite materials, a method is proposed to change the deformation shape of the structure by mixing metals, to adjust the deformation characteristics of the structure to meet the needs of practical applications. The addition of metal layers to a bistable composite structure can alter the conformational curvature and also achieve the need for electrical and thermal conductivity. Here the mechanical properties of the mixed-metal bistable structure are simulated and analyzed by the finite element method. The results of this paper show that the addition of metals in different positions of the composite has a great influence on the two stable forms of the bi-stable structure. © 2023 International Committee on Composite Materials. All rights reserved.

关键词： Mixing

来源：评论

学校读者我要写书评

暂无评论

Super broadband absorbing hierarchical CoFe alloy/porous carbon@carbon nanotubes nanocomposites derived from metal-organic frameworks

引用

Journal of Materials science & technology 2022年第23期118卷 218-228页

作者： Siyao Guo Yunfeng Bao Ying Li Hailong Guan Dongyi Lei Tiejun Zhao Baomin Zhong Zhihong Li School of Civil Engineering Qingdao University of TechnologyQingdao 266033China Postdoctoral Workstation Guangdong Dongpeng Holding Company LimitedGuangdong 528031China Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone Qingdao University of TechnologyQingdao 266033China National Key Laboratory of Science and Technology for National Defence on Advanced Composites in special Environments Harbin Institute of TechnologyHarbin 150080China

The exploitation of electromagnetic wave absorption(EMA) materials has attracted ever-increasing attention,not only because electromagnetic wave(EMW) originated from overuse of electronic products has threatened human' health seriously,but also because EMA materials can effectively protect radar stealth from being ***,it is still a challenge to obtain broadband and efficient EMA materials to satisfy practical *** this work,we developed a series of hierarchical CoFe alloy/porous carbon@carbon nanotubes(CoFe/PC@CNTs) nanocomposites through revising the proportion of Fe^(2+) in the metal-organic frameworks(MOFs)(CoFe-ZIF) precursor and one-step simple pyrolysis *** cross deposition between CoFe alloy,carbon nanotubes(CNTs),and porous carbon(PC) formed a double conductive network,favoring for achieving excellent EMA ***,when the filler mass ratio is only 10 wt%,the optimized CoFe/PC@CNTs nanocomposites display the best EMA capability,whose minimum reflection loss(RL_(min)) value is-68.94 dB at 13.69 GHz and the effective absorption band(EAB,<-10 dB) reaches up 9.14 GHz with a matching thickness of 2.63 *** addition,the largest EAB can achieve up to 11 GHz(3.35-14.35 GHz) during all matching *** splendid EMA performance benefits the favorable dielectric loss provided by the double conductive network,the good magnetic loss benefited from the evenly distributed CoFe alloy,the excellent impedance matching,rich transmission paths,and multiple ***,such EMA materials with super broadband absorbing provide desirable candidates for lightweight and high-efficient microwave absorbers.

关键词： Electromagnetic wave absorption CoFe alloy/porous carbon@carbon nanotubes nanocomposites Broadband absorbing Metal-organic frameworks

来源：评论

学校读者我要写书评

暂无评论

Exploring the Multi-Scale Evolution Mechanism of the Ultra-High-Temperature Mechanical Behaviour of Carbon/Carbon composites

SSRN

引用

SSRN 2024年

作者： Song, Lichao Meng, Songhe Zhang, Ying Yang, Fan Xie, Weihua National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China Key Laboratory of Advanced Functional Composite Materials Aerospace Research Institute of Materials & Processing Technology Beijing100076 China

The microstructure and mechanical properties of Carbon/Carbon (C/C) composites were investigated after ultra-high-temperature heat treatment (HTT) in the range of 30 – 2950 °C. The effect mechanism of high temperatures on the mechanical behaviour of C/C composites was proposed for three scales, i.e., graphene sheets, carbon fibre (CF) monofilaments, and C/C composites. The results displayed that the tensile strength of CF monofilaments decreases monotonically as the HTT increases in the range of 2000 – 2950 °C, while C/C composites present a tendency to decrease and then increase, demonstrating that CF/matrix interfacial properties play a decisive role in the tensile properties. The compression and flexural properties showed a trend opposite to the tensile properties, Young’s modulus of both CF monofilaments and C/C composites increases. A turning point in the microstructure of C/C composites was observed after HTT at 2700 °C, in which the graphitisation degree decreases and the size of graphene sheets becomes fluctuating, while the high-temperature mechanical properties began to be superior to room temperature (RT). The high-temperature mechanical properties of C/C composites were regulated by the competing mechanisms of the graphite crystallite structure and the skin-core structure of CF monofilament, the CF/matrix interfacial strength and the porosity of C/C composites. © 2024, The Authors. All rights reserved.

关键词： Carbon fibers

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：