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Fe doping 1T phase MoS_(2)with enhanced zinc-ion storage ability and durability for high-performance aqueous zinc-ion batteries

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Rare Metals 2025年第1期44卷 253-263页

作者： Jing-Yi Liu Rong-Jie Zhe Zhan-Hong Peng Yi-Hui Song Lin-Xuan Yang Chen Qing Jun-Ling Guo Jin-Ping Liu Yunnan Key Laboratory of Opto-Electronic Information Technology College of Physics and Electronic Information TechnologyYunnan Normal UniversityKunming 650000China Country State Center for International Cooperation on Designer Low-Carbon and Environmental Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China School of Chemistry Chemical Engineering and Life ScienceState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China

As a promising cathode material for aqueous zinc-ion batteries,1T-MoS_(2)has been extensively investigated because of its facile two-dimensional ion-diffusion channels and high electrical ***,the limited number of available Zn storage sites,i.e.,limited capacity,hinders its application because the inserted Zn^(2+),which form strong electrostatic interactions with 1T-MoS_(2),preventing subsequent Zn^(2+)***,the approach of enlarging the interlayer distance to reduce electrostatic interactions has been commonly used to enhance the capacity and reduce Zn^(2+)migration ***,an enlarged interlayer spacing can weaken the van der Waals force between 1T-MoS_(2)monolayers,easily disrupting the structural ***,to address this issue,an effective strategy based on Fe doping is proposed for 1T-MoS_(2)(Fe-1T-MoS_(2)).The theoretical calculations reveal that Fe doping can simultaneously moderate the rate of decrease in the adsorption energy after gradually increasing the number of stored atoms,and enhance the electron delocalization on metal-O ***,the experiment results show that Fe doping can simultaneously activate more Zn storage sites,thus enhancing the capacity,and stabilize the structural stability for improved cycling ***,Fe-1T-MoS_(2)exhibits a larger capacity(189 mAh·g^(-1)at 0.1 A·g^(-1))and superior cycling stability(78%capacity retention after 400 cycles at 2 A·g^(-1))than pure 1T-MoS_(2).This work may open up a new avenue for constructing high-performance MoS_(2)-based cathodes.

关键词： Aqueous zinc-ion battery 1T-MoS_(2) Fe doping More Zn storage sites Enhanced structural stability

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Facile formation of Mg-containing interphase on nanosilicon from Agar/MgCO3 precursor for lithium-ion battery anodes

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Progress in Natural Science:materials International 2025年第1期35卷 177-186页

作者： Ke Zhang Jianhua Zhou Haoran Liu Xiaoyang Wang Jie Gao Jun-Liang Chen Haiqing Qin Wenping Liu Xiaoxu Lei Lei Miao Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy Materials School of Material Science and Engineering Guilin University of Electronic Technology Novel Battery Materials Research Center of Engineering Technology State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite StructuresSchool of Physical Science and Technology Guangxi University Guangxi Key Laboratory of Superhard Material Guangxi Technology Innovation Center for Special Mineral Material China Nonferrous Metal (Guilin) Geology and Mining Co. Ltd.

The ultra-high theoretical capacity(4200 mAh g-1) of Silicon anode materials for lithium-ion batteries while which is one of the ideal replacement materials for graphite anodes. However, the poor electrical conductivity and greatly reduces the cycle life of the battery of Silicon material, which suffers from severe volume expansion during charge/discharge cycling leading to electrode pulverization. In this work, Agar/magnesium carbonate-coated silicon nanocomposites were synthesized by utilizing the "self-solidifying" property of agar. The magnesium oxide formed by the decomposition of magnesium carbonate at high temperatures mitigates the volume expansion of nanosilicon together with the derived carbon layer. Moreover, the lithium-magnesium alloy electronconducting interface layer generated by the reaction between lithium ions and magnesium oxide, which greatly shortens the diffusion length of lithium ions and electrons inside the electrode during the charge-discharge cycle. The first discharge specific capacity was 2060.2 mAh g-1, the Coulombic efficiency as high as 86.28 %, and still possesses a reversible specific capacity of 801.5 mAh g-1after cycling 200 cycles at a high current of 500 mA g-1of Agar/magnesium@Si with optimal ratio composite. The composite material used in this work largely suppresses the volume expansion of the silicon anode and contributes to the design of low-cost and high Coulombic efficiency lithium-ion batteries.

关键词： Agar-coated Lithium-ion battery Lithium-magnesium conductive layer Silicon anode

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Study on the hydrogen absorption properties of a YGdTbDyHo rare-earth high-entropy alloy

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International Journal of Minerals,Metallurgy and materials 2025年第1期32卷 127-135页

作者： Tongyue Li Ziliang Xie Wenjiao Zhou Huan Tong Dawen Yang Anjia Zhang Yuan Wu Xiping Song State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Whole Win(Beijing)Materials Sci.&Tech.Co. Ltd.Beijing 100083China

This study investigated the microstructure and hydrogen absorption properties of a rare-earth high-entropy alloy(HEA),*** indicated that the YGdTbDyHo alloy had a microstructure of equiaxed grains,with the alloy elements distributed *** hydrogen absorption,the phase structure of the HEA changed from a solid solution with an hexagonal-close-packed(HCP)structure to a high-entropy hydride with an faced-centered-cubic(FCC)structure without any secondary phase *** alloy demonstrated a maximum hydrogen storage capacity of 2.33 H/M(hydrogen atom/metal atom)at 723 K,with an enthalpy change(ΔH)of-141.09 kJ·mol^(-1)and an entropy change(ΔS)of-119.14 J·mol^(-1)·K^(-1).The kinetic mechanism of hydrogen absorption was hydride nucleation and growth,with an apparent activation energy(E_(a))of 20.90 kJ·mol^(-1).Without any activation,the YGdTbDyHo alloy could absorb hydrogen quickly(180 s at 923 K)with nearly no incubation period *** reason for the obtained value of 2.33 H/M was that the hydrogen atoms occupied both tetrahedral and octahedral *** results demonstrate the potential application of HEAs as a high-capacity hydrogen storage material with a large H/M ratio,which can be used in the deuterium storage field.

关键词： rare-earth high-entropy alloy hydrogen absorption capacity pressure–composition–temperature curves kinetics

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Unraveling the significance of cobalt on transformation kinetics,crystallography and impact toughness in high-strength steels

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International Journal of Minerals,Metallurgy and materials 2025年第2期32卷 380-390页

作者： Yishuang Yu Jingxiao Zhao Xuelin Wang Hui Guo Zhenjia Xie Chengjia Shang Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

This work reveals the significant effects of cobalt(Co)on the microstructure and impact toughness of as-quenched highstrength steels by experimental characterizations and thermo-kinetic *** results show that the Co-bearing steel exhibits finer blocks and a lower ductile-brittle transition temperature than the steel without ***,the Co-bearing steel reveals higher transformation rates at the intermediate stage with bainite volume fraction ranging from around 0.1 to *** improved impact toughness of the Co-bearing steel results from the higher dense block boundaries dominated by the V1/V2 variant ***,the addition of Co induces a larger transformation driving force and a lower bainite start temperature(BS),thereby contributing to the refinement of blocks and the increase of the V1/V2 variant *** findings would be instructive for the composition,microstructure design,and property optimization of high-strength steels.

关键词： high-strength steel cobalt transformation kinetics crystallography impact toughness

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Synthesis of highly dispersible TiO2 nanoparticles and their application in quantum dot light emitting diodes

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Dalton Transactions 2025年第20期54卷 8174-8182页

作者： Hu, Botao Liu, Mengxin Shi, Xinan Pan, Daocheng State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials School of Resources Environment and Materials Guangxi University Nanning530004 China

Metal oxide nanoparticles are commonly used as electron transport layers (ETLs) in quantum dot light emitting diodes (QLEDs) because of their wide band gap, high electron mobility, and appropriate conduction and valence band positions. Currently, nanoparticulate ZnO is the most successful electron transportation material in high-performance QLEDs. However, the positive aging effect is widely observed for ZnO-based QLEDs, as the instability of amphiprotic ZnO nanoparticles under acidic, basic, and moist conditions limits their applications. In this study, highly dispersible and alcohol-soluble TiO2 nanoparticles are synthesized by using a non-hydrolytic sol-gel method, followed by a dimethyl sulfoxide post-treatment. The use of colloidal TiO2 nanoparticles as an ETL yields optimal QLEDs, with a maximum external quantum efficiency of 12.03%, a highest luminance value of 103 420 cd m−2, and a current efficiency of 18.06 cd A−1. These results reveal that TiO2 nanoparticles hold great potential as ETLs in future QLEDs. © 2025 The Royal Society of Chemistry.

关键词： Sol-gel process

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LaVO_(4)prepared by a high-yield method for superior catalysis to the hydrogen storage of MgH_(2)

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Journal of Magnesium and Alloys 2025年第2期13卷 613-625页

作者： Meihong Wu Mingxia Gao Shanqing Qu Yongfeng Liu Wenping Sun Xin Zhang Chu Liang Xiaoyu Zhang Yaxiong Yang Hongge Pan State Key Laboratory of Silicon and Advanced Semiconductor Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province&School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027PR China Institute of Science and Technology for New Energy Xi'an Technological UniversityXi'an 710021PR China Zhejiang Carbon Neutral Innovation Institute Zhejiang University of TechnologyHangzhou 310014PR China

MgH_(2)is a promising solid-state hydrogen storage ***,its high thermodynamics and sluggish kinetics hinder its practical *** strategy is effective in improving its kinetic ***,the highly efficient catalysts or additives are normally of low-yield in fabrication with high *** this work,a novel structural LaVO_(4)fabricated by a low-cost method of spraying dry followed by a calcination is used as a catalytic additive for the hydrogen storage of MgH_(2).With an optimized addition of LaVO_(4),the overall hydrogen storage performances of MgH_(2)are significantly *** onset dehydrogenation temperature of only 183℃is obtained after an initial activation of dehydrogenation and *** system can desorb 5.7 wt%H_(2)at 250℃within 10 min and maintains a dehydrogenation capacity of 5.0 wt%H_(2)after 50 *** is found that LaVO_(4)is transferred to lanthanum hydride and metallic vanadium in the initial dehydrogenation process,the former acts as a highly effective catalyst for the hydrogen storage of MgH_(2)and the latter undergoes reversible hydrogenation and dehydrogenation in the subsequent *** structural design of the catalyst and its scalable fabrication are highly valuable in realizing the practical application of catalytic strategy for the hydrogen storage of MgH_(2).

关键词： Magnesium hydride Hydrogen storage properties Catalysis,Bimetallic oxide Spray drying

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Design and characterization of 3D printed gradient scaffolds with spatial distribution of pore sizes

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Ceramics International 2025年第9期51卷 12185-12196页

作者： Ye, Fan Yang, He Hong, Chuhang Wu, Xiaopei Dai, Honglian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National Energy Key Laboratory for New Hydrogen-ammonia Energy Technologies Foshan Xianhu Laboratory Foshan528200 China

In bone repair, scaffold structural design is essential for optimizing mechanical performance and osteogenic potential. Gradient structural scaffolds are engineered to balance mechanical qualities and permeability which can improve the material transport capacity of scaffolds. This study designed and fabricated gradient structural scaffolds with spatially distributed pore sizes, and investigated their mechanical and fluid dynamics properties, coupled with in vitro osteogenic experiments to understand the impact of pore sizes distribution. The results indicated that, compared to traditional uniform pore scaffolds, gradient scaffolds exhibited a significant increase in mechanical strength, fluid permeability, and in vitro osteogenic activity. To sum up, the gradient scaffolds demonstrated better comprehensive performance and potential for use in the structural design of bone repair scaffolds, offering an important reference value for the three-dimensional structural design of scaffolds. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Bone

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Janus MXene film with gradient structure for highly efficient terahertz and infrared electromagnetic absorption

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Nano Research 2025年第1期18卷 434-442页

作者： Shaodian Yang Weiqiang Huang Zhiqiang Lin Zibo Chen Rongliang Yang Yi Jia Xuebin Liu Rui Wang Zhiping Zeng Yougen Hu Huanjun Chen Xuchun Gui11 State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China National Key Laboratory of Materials for Integrated Circuits Shenzhen Institute of Advanced Electronic MaterialsShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China China Academy of Aerospace Science and Innovation Beijing 100176China Guangdong Province Key Laboratory of Display Material and Technology Guangzhou 510275China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China

Electromagnetic interference (EMI) shielding inhigh-frequency range, especially the rapidly growing terahertz(THz) frequency range, attracts increasing attention due tothe potential application of terahertz in 6G wirelesscommunication, and security inspection. However, traditionalconductive EMI films typically achieve high shieldingeffectiveness through strong reflection, which may causesecondary pollution to other devices. Here, a gradientstructure strategy was proposed to constructTi_(3)C_(2)Tx/hydroxypropyl methyl cellulose (HPMC) film, in whichthe content of Ti_(3)C_(2)Tx gradually increases along the thicknessdirection, resulting in different conductivity of the two surfaces(surface-M and surface-H) for the film. The obtained gradientfilmexhibits an EMI shielding efficiency of over 48.5 dB in theTHz range (0.2-1.6 THz) at a thickness of 40 μm. Especially,as the THz waves incident from the surface-H to the film, the absorption effectiveness reaches 48.2 dB (average absorbedpower loss up to 91.4%), and the reflection effectiveness is only 0.3 dB. In additions, the gradient-film also demonstrates ahigh absorption rate of 95.5% in the infrared band (2.5-16.7 μm). Moreover, the gradient-film exhibits an excellent tensilestress and Young’s modulus value of 173.1 MPa and 2.8 GPa, respectively. Therefore, the gradient-film proposed in thiswork, with excellent electromagnetic absorption in both THz and infrared band, provides a promising candidate for the nextgenerationEMI shielding applications.

关键词： electromagnetic interference shielding Janus film terahertz MXene

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Study on sulfur resistance of MnO2/Beta zeolite in toluene catalytic combustion: The effect of increased acidity on catalytic performance

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Chinese Journal of Chemical Engineering 2025年第2期78卷 187-195页

作者： Zhuo Wang Zetao Jin Hanqi Ning Baishun Jiang Kaiyuan Xie Shufeng Zuo Qiuyan Wang Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process College of Chemistry and Chemical Engineering Shaoxing University College of Materials Science and Engineering Beijing University of Technology State Key Laboratory of Elemento-Organic Chemistry Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) College of Chemistry Nankai University

Sulfur dioxide(SO2) frequently coexist with volatile organic compounds(VOCs) in exhaust gas. The competitive adsorption of SO2and VOCs can adversely affect the efficiency of catalytic combustion,leading to catalyst poisoning and irreversible loss of activity. To investigate the impact of sulfur poisoning on the catalysts, we prepared the Mn O2/Beta zeolite, and a corresponding series of sulfur-poisoned catalysts through in-situ thermal decomposition of(NH4)2SO4. The decrease in toluene catalytic activity of poisoned Mn O2/Beta zeolite primarily results from the conversion of the active species Mn O2to Mn SO4. However, the crystal structure and the porous structure of Mn O2/Beta zeolite were stable, and original structure was still maintained when 1.6%(mass) sulfur species were introduced. Furthermore,the extra-framework Al of Beta zeolite could capture sulfur species to generate Al2(SO4)3, thereby reducing sulfur species from reacting with Mn4+active sites. The combination of sulfur and Beta zeolite was found to directly produce new strong-acid sites, thus effectively compensating for the effect of reduced Mn4+active species on the catalytic activity.

关键词： (NH4)2SO4 Beta zeolite In-situ thermal decomposition Sulfur-resistant mechanism VOCs catalytic oxidation

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Reduced graphene oxide-induced in-situ uniform growth of hydrated WO_(3) film for enhanced electrochromic performance

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Nano Research 2025年第4期18卷 569-577页

作者： Rui Fang Yang Liu Chunyu Shi Huihui Jin Zibo Chen Haohao Sun Ben Lv Daping He Xusheng Zheng Yuli Xiong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China School of Science Wuhan University of TechnologyWuhan 430070China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

WO_(3)-graphene electrochromic materials are widely used in electrochromic devices including smart windows and electronic displays,due to their ability to adjust optical transmittance in the visible and near-infrared ranges under low electrode ***,the uniformity of the film remains a challenge for the widely used physical mixing-coating *** this study,we present a two-dimensional material-assisted synthesis of a porous hydrated WO_(3) film(WH-rGO)based on reduced graphene oxide(rGO)nanosheets and WO_(3)(rGO-WO_(3))seed layer via a hydrothermal *** incorporation of rGO not only promotes the uniform growth of hydrated WO_(3) film,enhancing ion transport but also introduces oxygen vacancies,creating an efficient conduction pathway for charge *** resulting WH-rGO film exhibits impressive performance,achieving 71% optical modulation at 700 nm,with bleaching and coloring times of 4.2 and 1.0 *** coloration efficiency is calculated at 156.11 cm^(2)·C^(-1),and the optical modulation is maintained at 93% of the initial optical modulation after 1000 cycles applied in the +1.0 and -1.1 V potential *** work offers new insights into the role of oxygen vacancies in enhancing the electrochromic properties of hydrated WO_(3) films through the addition of *** also provides a promising approach for the synthesis of electrochromic materials,facilitating their application in smart window technologies.

关键词： electrochromic film hydrated tungsten oxide reduced graphene oxide oxygen vacancy

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