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Emerging WS_(2)/WSe_(2)@graphene nanocomposites: synthesis and electrochemical energy storage applications

Rare Metals 2024年第1期43卷 1-19页

作者： Yu-Meng Gao Yong Liu Kai-Jia Feng Jun-Qing Ma Ying-Jie Miao Bin-Rui Xu Kun-Ming Pan Osaka Akiyoshi Guang-Xin Wang Ke-Ke Zhang Qiao-Bao Zhang National Joint Engineering Research Center for Abrasion Control and Molding of Metal materials Henan Key Laboratory of Non-Ferrous Materials Science and Processing TechnologySchool of Materials Science and EngineeringHenan University of Science and TechnologyLuoyang 471023China Provincial and Ministerial Co-Construction of Collaborative School of Electrical Engineering Henan University of Science and TechnologyLuoyang 471023China Biomaterials laboratory Faculty of EngineeringOkayama UniversityTsushima-NakeOkayama-Shi 700-8530Japan Department of materials Science and Engineering College of MaterialsXiamen UniversityXiamen 361005China Fujian key laboratory of Surface and Interface Engineering for High Performance materials Xiamen UniversityXiamen 361005China

In recent years, tungsten disulfide(WS_(2)) and tungsten selenide(WSe_(2)) have emerged as favorable electrode materials because of their high theoretical capacity, large interlayer spacing, and high chemical activity;nevertheless, they have relatively low electronic conductivity and undergo large volume expansion during cycling, which greatly hinder them in practical applications. These drawbacks are addressed by combining a superior type of carbon material, graphene, with WS_(2) and WSe_(2) to form a WS_(2)/WSe_(2)@graphene *** materials have received considerable attention in electro-chemical energy storage applications such as lithium-ion batteries(LIBs), sodium-ion batteries(SIBs),and supercapacitors. Considering the rapidly growing research enthusiasm on this topic over the past several years, here the recent progress of WS_(2)/WSe_(2)@graphene nanocomposites in electrochemical energy storage applications is summarized. Furthermore, various methods for the synthesis of WS_(2)/WSe_(2)@graphene nanocomposites are reported and the relationships among these methods, nano/microstructures, and electrochemical performance are systematically summarized and discussed. In addition, the challenges and prospects for the future study and application of WS_(2)/WSe_(2)@graphene nanocomposites in electrochemical energy storage applications are proposed.

关键词： WS_(2)/WSe_(2)@graphene nanocomposites Liion batteries(LIBs) Na-ion batteries(SIBs) Supercapacitors Electrochemical performance

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Internal variable gradient model for active earth pressure of rigid retaining wall moving with translation

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Geohazard Mechanics 2024年第3期2卷 189-196页

作者： Haoxiang Chen Mingyang Wang Shuo Wang Chengzhi Qi Beijing University of Civil Engineering and Architecture Beijing100044China State key laboratory of Disaster Prevention and Mitigation of Explosion and Impact Army Engineering University of PLANanjing210007China Navy 971 Hospital of PLA QingdaoShandong266071China

The instability of retaining wall is a key factor for many geo-hazards,such as *** estimate the stability of retaining wall,the distribution of earth pressure is *** results of in-situ observations and indoor experiments demonstrate that the distribution of earth pressure behind the retaining wall exhibits remarkable *** the results are analyzed in details,the oscillation and quasi-periodicity of the distribution of earth pressure are observed,which has not been given widely concerns and cannot be described by the existing analytical *** on the internal variable gradient theory and operator averaging method,a gradientenhanced softening constitutive model is proposed in this paper to describe the oscillation and quasiperiodicity of the distribution of earth pressure acting on the retaining wall,by introducing the high-order gradient terms of the hydrostatic pressure into Mohr-Coulomb yield *** order to check the applicability of the proposed formulation,the predictions from the formulations are compared with the full-scale and laboratory-scale test results as well as the existing *** is noted from the comparisons between predicted and measured values that the results of gradient-dependent softening constitutive model provides the comparable approximations for active earth pressure and describes the oscillation and quasi-periodicity very *** model may enhance the comprehension of soil mechanics and provide a novel view for the design of the retaining wall.

关键词： Retaining wall Active earth pressure Oscillation and quasi-periodicity Gradient theory

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Precisely quantifying bulk transition metal valence evolution in conventional battery electrode by inverse partial fluorescence yield

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Journal of Energy Chemistry 2022年第6期31卷 363-368,I0010页

作者： Kehua Dai Weiwei Shao Beibei Zhao Wenjuan Zhang Yan Feng Wenfeng Mao Guo Ai Gao Liu Jing Mao Wanli Yang College of Chemistry Tianjin Normal UniversityTianjin 300387China Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCA 94720United States College of Physics and materials Science Tianjin Normal UniversityTianjin 300387China Energy Storage and Distributed Resources Division Energy Technologies AreaLawrence Berkeley National LaboratoryBerkeleyCA 94720United States School of materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina

Precisely quantifying transition metal(TM) redox in bulk is a key to understand the fundamental of optimizing cathode materials in secondary batteries. At present, the commonly used methods to probe TM redox are hard X-ray absorption spectroscopy(hXAS) and soft X-ray absorption spectroscopy(sXAS).However, they are both facing challenges to precisely quantify the valence states of some transition metals such as Mn. In this paper, Mn-L iPFY(inverse partial fluorescence yield) spectra extracted from Mn-L m RIXS(mapping of resonant inelastic X-ray scattering) is adopted to quantify Mn valence states. Mn-L i PFY spectra has been considered as a bulk-sensitive, non-distorted probe of TM valence ***, the exact precision of this method is still unclear in quantifying practical battery ***, a series of LiMn_(2)O_(4) electrodes with different charge and discharge states are prepared. Based on their electrochemical capacity(generally considered to be very precise), the precision of Mn iPFY in quantifying bulk Mn valence state is confirmed, and the error range is unraveled. Mn-L mRIXS iPFY thus is identified as one of the best methods to quantify the bulk Mn valence state comparing with hXAS and sXAS.

关键词： Cathode materials Valence state of transition metals Lithium-ion batteries Mapping of resonant inelastic X-ray scattering Inverse partial fluorescence yield

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Coordination states of metal ions in molten salts and their characterization methods

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International Journal of Minerals,Metallurgy and materials 2023年第7期30卷 1261-1277页

作者： Xin Song Shaolong Li Shanshan Liu Yong Fan Jilin He Jianxun Song School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China Zhongyuan Critical Metals laboratory Zhengzhou UniversityZhengzhou 450001China College of Resource and Environmental Engineering Wuhan University of Science and TechnologyWuhan 430081China

The macroscopic characteristics of molten salts are governed by their *** on the structures of molten salts provides the foundation for a full understanding of the physicochemical properties of molten salts as well as a deeper analysis of the microscopic electrolysis process in molten *** about the microstructure of matter can be obtained with the help of several speculative and experimental *** this review,the advantages and disadvantages of the various test procedures used to determine the microstructures of molten salts are *** typical coordination configurations of metal ions in molten salt systems are also ***,the impact of temperature,anions,cations,and metal oxides(O2-)on the structures of molten salts is discussed in *** accuracy and completeness of the information on molten salt structures need to be investigated by the integration of multiple methods and interdisciplinary *** on the microstructure and coordination of molten salts deepens the understanding of the elementary elements of the microstructure of *** paper,which is based on the review of the coordination states of metal ions in molten salts,is hoped to inspire researchers to explore the inter-relationship between the microstructure and macroscopic properties of materials.

关键词： microstructure salts coordination

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Defect Engineering on Carbon‑Based Catalysts for Electrocatalytic CO2 Reduction

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Nano-Micro Letters 2021年第1期13卷 56-78页

作者： Dongping Xue Huicong Xia Wenfu Yan Jianan Zhang Shichun Mu College of materials Science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China State key laboratory of Inorganic Synthesis and Preparative Chemistry and College of ChemistryJilin University2699 Qianjin StreetChangchun 130012People’s Republic of China State key laboratory of Advanced Technology for materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China

Electrocatalytic carbon dioxide(CO2)reduction(ECR)has become one of the main methods to close the broken carbon cycle and temporarily store renewable energy,but there are still some problems such as poor stability,low activity,and *** the most promising strategy to improve ECR activity is to develop electrocatalysts with low cost,high activity,and long-term ***,defective carbon-based nanomaterials have attracted extensive attention due to the unbalanced electron distribution and electronic structural distortion caused by the defects on the carbon ***,the present review mainly summarizes the latest research progress of the construction of the diverse types of defects(intrinsic carbon defects,heteroatom doping defects,metal atomic sites,and edges detects)for carbon materials in ECR,and unveil the structure-activity relationship and its catalytic *** current challenges and opportunities faced by high-performance carbon materials in ECR are discussed,as well as possible future *** can be believed that this review can provide some inspiration for the future of development of high-performance ECR catalysts.

关键词： Electrocatalytic CO2 reduction Carbon-based nanomaterials Intrinsic defects Heteroatom doping defects Metal atomic sites

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Atomic Level Dispersed Metal–Nitrogen–Carbon Catalyst toward Oxygen Reduction Reaction: Synthesis Strategies and Chemical Environmental Regulation

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Energy & Environmental materials 2021年第1期4卷 5-18页

作者： Hengbo Yin Huicong Xia Shuyan Zhao Kexie Li Jianan Zhang Shichun Mu College of materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China State key laboratory of Advanced Technology for materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

For development and application of proton exchange membrane fuel cell(PEMFC) energy transformation technology, the cost performance must be elevated for the catalyst. At present, compared with noble metal-based catalysts, such as Pt-based catalysts, atomically dispersed metal–nitrogen–carbon(M–N–C) catalysts are popularity and show great potential in maximizing active site density, high atom utilization and high activity,making them the first choice to replace Pt-based catalysts. In the preparation of atomically dispersed metal–nitrogen–carbon catalyst, it is difficult to ensure that all active sites are uniformly dispersed, and the structure system of the active sites is not optimal. Based on this, we focus on various approaches for preparing M–N–C catalysts that are conducive to atomic dispersion, and the influence of the chemical environmental regulation of atoms on the catalytic sites in different catalysts. Therefore, we discuss the chemical environmental regulation of the catalytic sites by bimetals, atom clusters, and heteroatoms(B, S, and P). The active sites of M–N–C catalysts are explored in depth from the synthesis and characterization, reaction mechanisms, and density functional theory(DFT)calculations. Finally, the existing problems and development prospects of the current atomic dispersion M–N–C catalyst are proposed in detail.

关键词： atomic-level catalyst chemical environmental effects metal-nitrogen-carbon oxygen reduction reaction synthesis strategy

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Recent Development of Photodeformable Crystals:From materials to Mechanisms

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Research 2021年第1期2021卷 1059-1084页

作者： Cheng Huang Rongjuan Huang Simin Zhang Haodong Sun Hailan Wang Beibei Du Yuxin Xiao Tao Yu Wei Huang Frontiers Science Center for Flexible Electronics(FSCFE) Shaanxi Institute of Flexible Electronics(SIFE)&Shaanxi Institute of Biomedical Materials and Engineering(SIBME)Northwestern Polytechnical University(NPU)127 West Youyi RoadXi’an 710072China key laboratory of Flexible Electronics(KLOFE)&Institute of Advanced materials(IAM) Nanjing Tech University(NanjingTech)30 South Puzhu RoadNanjing 211816China key laboratory for Organic Electronics and Information Displays&Jiangsu key laboratory for Biosensors Institute of Advanced Materials(IAM)Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts and Telecommunications9 Wenyuan RoadNanjing 210023China

Photodeformable materials are a class of molecules that can convert photon energy into mechanical energy,which have attracted tremendous attention in the last few *** to their unique photoinduced deformable properties,including fast lightresponse and diverse mechanical behaviors,photodeformable materials have exhibited great potential in many practical applications such as actuators,photoswitches,artificial muscles,and *** this review,we sort out the current state of photodeformable crystals and classify them into six categories by molecular structures:diarylethenes,azobenzenes,anthracenes,olefins,triarylethylenes,and other *** distinct light-responsive mechanisms,photocyclization,trans-cis isomerization,and photodimerization,are revealed to play significant roles in the molecular *** corresponding photodeformable behaviors such as twisting,bending,hopping,bursting,and curling,as well as the potential applications,are also ***,the challenges and prospective development directions of photodeformable crystals are highlighted.

关键词： behaviors bending directions

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Research on Vegetation Community Restoration Technology of Engineering Destruction Surface Based on Real-Time Fusion of Environmental Background

Research on Vegetation Community Restoration Technology of E...

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作者： Wen Luo Dongliang Ma Dafeng Yang Research Institute for National Defense Engineering of Academy of Military Science PLA China henan key laboratory of special protective materials

Vegetation community restoration is an important means for background matching modelling of destructive surface in disturbed area of engineering and real-time fusion of environmental *** at the problems of large-scale reconstruction or new construction,changing topography and landform,difficult ecological restoration and poor natural similarity of existing vegetation *** investigation of plant communities around the engineering area,methods such as stable base materials,rapid and sustained nutrient supply,plant screening and cultivation and functional testing were ***-dimensional construction of plant communities on the destructive surface of engineering disturbance area was carried out,promoting the succession of vegetation communities to surrounding vegetation ***,the effect of vegetation community restoration was *** show that the vegetation coverage rate is 89.4%;the replanting rate is high,which reduces the difference between the restored vegetation and the surrounding *** a certain period of vegetation community restoration,it can naturally and continuously merge into the background vegetation,destroying the characteristics of target detection and recognition,and realizing dynamic real-time fusion,and improving the natural similarity of the vegetation ecological restoration system.

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An angle-insensitive electromagnetic absorber enabling a wideband absorption

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Journal of materials Science & Technology 2022年第18期113卷 33-39页

作者： Zhichao Lou Qiuyi Wang Xiaodi Zhou Ufuoma I.Kara Rajdeep S.Mamtani Hualiang Lv Meng Zhang Zhihong Yang Yanjun Li Chenxuan Wang Solomon Adera Xiaoguang Wang Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjing 210037China Willian G.Lowrie Department of Chemical and Biomolecular Engineering The Ohio State UniversityColumbusOH43210United States of America Institute of materials Research and Engineering Agency for SciencesTechnology and ResearchSingapore State key laboratory of Medical Molecular Biology Institute of Basic Medical Sciences Chinese Academy of Medical SciencesSchool of Basic Medicine Peking Union Medical CollegeBeijing 100005China Department of Mechanical Engineering University of MichiganAnn ArborMI48109United States of America Sustainability Institute The Ohio State UniversityColumbusOH43210United States of America School of materials Science and Engineering Henan University of Science and TechnologyLuoyang 471023China

Electromagnetic(EM)wave absorbers with wideband absorption capability are proposed as a strategy to mitigate environmental pollution by EM ***,designing an EM absorber with its performance capacity independent of the EM wave incident angle remains elusive to *** this challenge requires development of EM absorbers whose EM absorption performance is insensitive to the EM wave incident ***,we synthesized EM absorbers with a variety of structures with different symme-tries(including micro-/nanospheres,nanoflakes and nanotubes)to study the effect of the EM absorbers’structure and the EM wave incident angle on the EM absorption *** analysis reveals that non-magnetic EM absorbers with spatially symmetric nanostructures exhibit excellent EM wave incident ***,we demonstrate that a class of non-magnetic EM absorbers made from bam-boo derived-carbon nanospheres exhibit EM incident angle-insensitivity and wideband EM absorption performance with an effective absorption band up to 3.5 GHz when the thickness is 1.4 mm,a signif-icant improvement from prior studies which used thicknesses as high as 3-4 mm for comparable EM absorption performance.

关键词： Nanostructure Angle-insensitive EM absorption Biomass derived carbon Wideband

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Interdiscipline between optoelectronic materials and mechanical sensors:Recent advances of organic triboluminescent compounds and their applications in sensing

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Journal of Central South University 2021年第12期28卷 3907-3934页

作者： SUN Hao-dong DU Bei-bei WU Ya-zhang WANG Hai-lan ZHANG Xia-yu WANG Juan ZHANG Si-min WEI Shan-shan YU Tao Frontiers Science Center for Flexible Electronics(FSCFE)and X i’an Institute of Flexible Electronics(IFE) Northwestern Polytechnical UniversityXi’an 710072China Queen Mary University of London Engineering School Northwestern Polytechnical UniversityXi’an 710119China School of Packaging and materials Engineering Hunan University of TechnologyZhuzhou 412007China

Triboluminescence,also as known as mechanoluminescence,is an attractive optical behavior that means the light emitted from specific organic and inorganic materials when they are subjected to external forces,such as crushing,deformation,cleaving,*** triboluminescent materials show great potential for applications in sensing,such as stress sensing,damage ***,the triboluminescent mechanism of organic materials should be pushed further as well as their *** this review,we summarized the history of development and possible mechanism of organic triboluminescent materials,and discussed various applications in sensing *** the same time,inspired by the existing research progress in inorganic triboluminescent materials,we proposed the flourishing development prospects of organic triboluminescent materials in stress sensors,movement monitoring,imaging stress distribution,visualization of crack propagation,structural diagnosis,and other fields.

关键词： triboluminescence crystal engineering stress imaging piezoelectric properties

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