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Metallic Sb-stabilized porous silicon with stable SEI and high electron/ion conductivity boosting lithium-ion storage performance

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Rare Metals 2024年第9期43卷 4234-4242页

作者： Jia-Guo Deng Hao-Qin Feng Yu-Long Xu Si-Guang Guo Jian-Ping Li kai-Fu Huo Ji-Jiang Fu Biao Gao pual-k.chu The State key Laboratory of Refractories and Metallurgy and Institute of Advanced Materials and Nanotechnology Wuhan University of Science and TechnologyWuhan 430081China Wuhan National Laboratory for Optoelectronics(WNLO) School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China Department of Physics Department of Materials Science&Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China

Silicon(Si)has mild discharge potential and high theoretical capacity,making it a highly desirable material for lithium-ion batteries(LIBs).Nevertheless,the excessive volume expansion,poor ion/electron conductiv ity and unstable solid electrolyte interface(SEI)hinde practical application to ***,the metallic antimony(Sb)stabilized porous Si(SiDSb)composite was prepared by magnesiothermic reduction of Sb_(2)O_(3)and Mg_(2)Si and chemical etching to remove the by-product of *** highly conductive Sb nanodots embedded in the Si liga ments promote not only the formation of conductive and stable LiF-rich SEI,but also the electron/ion transpor ability of *** to the outstanding bulk/interface stability,excellent conductivity,as well as ideal porous structure,the SiDSb electrode demonstrates a capacity of820 mAh·g^(-1)after undergoing 320 turns at 1000 mA·g^(-1).Additionally,it exhibits a stable capacity of 675 m Ah·g^(-1)when tested at a higher current density of 5000 m A·g^(-1).The results reveal a viable solution to solve three problems at the same time,namely the poor conductivity,inferior SEI and excessive volume expansion of Si,boding well for the design of Si-based materials for high-energy LIBs.

关键词： Silicon Anodes Lithium-ion batteries Antimony Solid electrolyte interphase

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功函促进钼基异质结电催化剂的电子结构重整提升其析氢反应活性（英文）

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Science China Materials 2025年第1期 189-198页

作者：陈想冯帅谢松苗亚萍高标张旭明黄莉李筠 Paul k.chu 彭祥 Hubei key Laboratory of Plasma Chemistry and Advanced Materials Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education School of Materials Science and Engineering Wuhan Institute of Technology School of Textile Science and Engineering Xi'an Polytechnic University The State key Laboratory of Refractories and Metallurgy Institute of Advanced Materials and Nanotechnology Wuhan University of Science and Technology Guizhou Wujiang Hydropower Development Co. Ltd. Department of Physics Department of Materials Science and Engineering and Department of Biomedical Engineering City University of Hong Kong

Mo基催化剂在电催化析氢反应（HER）中具有巨大应用潜力.然而,其活性位点的暴露不足、极强的氢吸附能力导致其催化性能未能充分体现.本文在碳布上构筑了Mo2N–MoSe2异质结（MNS）,以增强Mo基催化剂的HER活性.由于MNS中的Mo2N具有较低的...

Mo基催化剂在电催化析氢反应（HER）中具有巨大应用潜力.然而,其活性位点的暴露不足、极强的氢吸附能力导致其催化性能未能充分体现.本文在碳布上构筑了Mo2N–MoSe2异质结（MNS）,以增强Mo基催化剂的HER活性.由于MNS中的Mo2N具有较低的功函数,能够在异质界面产生内建电场,显著提高了其在HER中电荷转移效率.此外,MNS中原子之间的强电子相互作用优化了Mo位点的电子结构,降低了氢吸附能力,进一步增强了其本征催化活性.因此, MNS催化剂产生20 m A cm-2和1 A cm-2的析氢电流密度所需的过电位仅为65和210 mV, Tafel斜率仅为96 mV dec-1.此外, MNS在1 A cm-2电流密度下稳定运行240小时后,形貌、结构和性能均无明显变化.以上研究结果为工业大电流制氢所需的非贵金属基电催化剂的设计和合成提供了新思路.

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Ink Dispersion on Qianlong Xuan Paper with Improved Ink Expression

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Journal of Materials Science & Technology 2016年第2期32卷 182-188页

作者： Shuyi Wu Xinglong Wu Paul k.chu Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State Microstructures Nanjing University Department of Physics and Materials Science City University of Hong Kong

Qianlong Xuan paper, lost two hundred years ago, was reproduced by engineers in Red-Star Xuan Paper Limited Liability Company of China. Its remarkable performance and profound historical value are highly regarded by artists and the paper commands very high price in the commercial market. Ink penetrates and spreads optimally in the paper and the words exhibit clear edges with small fluctuations because of the desirable wettability and wicking. These characteristics make it stand out from three Xuan paper samples. The good wettahility, verified by contact angle measurements, is an essential prerequisite to strong wicking. Attenuated total reflectance Fourier-transform infrared spectroscopy is performed to determine the chemical structure of Qianlong Xuan paper and the relatively large hydrogen bonding ratio contributes to the hydrophilicity. The microstructure investigated by scanning electron microscopy and atomic force microscopy reveals wide fibers and a uniform fiber arrangement with good connectivity, dense network, as well as rough fiber surface. These unique properties endow Qianlong Xuan paper with strong wicking to improve the ink expression.

关键词： Qianlong Xuan paper Wettability Homogeneity Wicking Surface roughness

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Environmentally friendly wollastonite@TiO2 composite particles prepared by a mechano-chemical method

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Particuology 2018年第5期16卷 105-112页

作者： Xifeng Hou Yihe Zhang Hao Ding Paul k.chu Beijing key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChino University of Geosciences (Beijing)Beijing100083China Niushan Mining Co. Ltd.Tongling CountyAnhui 244131China Department of Physics and Materials Science City University ofHong KongTat Chee AvenueKowloonHong KongChina

Core-shell wollastonite@ TiO2(WOT)composite particles are prepared by a mechano-chemical method (MCM)to improve the dispersion of TiO2and reduce its dosage,and to achieve synergistic effects with the wollastonite *** crystal structure,morphology,functional groups,and pigment properties of the as-prepared composite powders are *** W@T composite particles are formed by van der Waals force in addition to electrostatic attraction and chemical *** anatase TiO2coating is anchored on the woUastonite surface by Si-O-Ti and Ca-O-Ti *** W@T powders possess excellent characteristics such as whiteness of 96.6%,hiding power of 17.97g/m^2,and oil absorption of 22.72g/*** properties of the W@T composite are similar to those of TiO2and the former,which is much cheaper,can potentially substitute the latter as a white paint in many applications.

关键词： Wollastonite TiO2 Composite particles Mechano-chemical method

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Assistant Anode in a Cathodic Arc Plasma Source

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Chinese Physics Letters 2001年第8期18卷 1103-1104页

作者： ZHANG Tao ZHANG Hui-Xing Ian G.Brown Paul k.chu Beijing Radiation Center Institute of Low Energy Nuclear PhysicsBeijing Normal UniversityBeijing 100875 Department of Physics and Materials Science City University of Hong Kong83 Tat Chee AvenueKowloonHong Kong Lawrence Berkeley National Laboratory University of CaliforniaBerkeleyCA 94720U.S.A.

The performance and characteristics of a cathodic arc plasma source,consisting of a titanium cathode,an anode with and without a tungsten mesh,and a coil producing a focusing magnetic field between the anode and cathode,are *** high transparency and large area of the mesh allow a high plasma flux to penetrate the anode from the cathodic *** mesh helps to decrease the arc resistance and the ignition voltage of the cathodic arc in the focusing magnetic field,and increase the life of the *** means that the source makes the cathodic arc easily and greatly stabilized during the operation when a focusing magnetic field exists in the source.

关键词： cathodic resistance titanium

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Subsurface intercalation activating basal plane of black phosphorus for nitrogen reduction

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Journal of Energy Chemistry 2021年第9期30卷 293-299页

作者： Xue Zhang Haitao Zhao Paul k.chu Jiahong Wang Xue-Feng Yu Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina

Ammonia(NH3)is not only an important chemical in many fields,but also provides a promising intermediate for energy stor-age[1,2].To produce NH3 from naturally abundant N2,the strong N≡N bond in the inert N2 molecules... 详细信息

关键词： Subsuface intercalation Nitrogen reduction reaction Basal surface sites Intrinsic activity Selectivity

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Effects of external stress on biodegradable orthopedic materials: A review

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Bioactive Materials 2016年第1期1卷 77-84页

作者： Xuan Li Chenglin chu Paul k.chu School of Materials Science and Engineering Southeast UniversityNanjing211189China Jiangsu key Laboratory for Advanced Metallic Materials Southeast UniversityNanjing211189China Department of Physics and Materials Science City University of Hong KongTat Chee AvenueKowloonHong KongChina

Biodegradable orthopedic materials(BOMs)are used in rehabilitation and reconstruction of fractured *** response of BOMs to the combined action of physiological stress and corrosion is an important issue in vivo since stress-assisted degradation and cracking are *** the degradation behavior and kinetics of BOMs have been investigated under static conditions,stress effects can be very serious and even fatal in the dynamic physiological *** stress is unavoidable in biomedical applications of BOMs,recent work has focused on the evaluation and prediction of the properties of BOMs under stress in corrosive *** article reviews recent progress in this important area focusing on biodegradable metals,polymers,and ceramics.

关键词： Biodegradable orthopedic materials External stress Stress mode Degradation rate Mechanochemistry

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Uniformity of Plasma Density and Film Thickness of Coatings Deposited Inside a Cylindrical Tribe by Radio Frequency Sputtering

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Plasma Science and Technology 2008年第5期10卷 560-564页

作者：崔江涛田修波杨士勤胡涛 Ricky k.Y.FU Paul k.chu School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Department of Physics and Material Science City University of Hong KongTat Chee AvenueKowloonHong KongChina

Plasma surface modification of the inner wall of a slender tube is quite difficult to achieve using conventional means. In the work described here, an inner coaxial radio frequency （RF） copper electrode is utilized to produce the plasma and also acts as the sputtered target to deposit copper films in a tube. The influence of RF power, gas pressure, and bias voltage on the distribution of plasma density and the uniformity of film thickness is investigated. The experimental results show that the plasma density is higher at the two ends and lower in the middle of the tube. A higher RF power and pressure as well as larger tube bias lead to a higher plasma density. Changes in the discharge parameter only affect the plasma density uniformity slightly. The variation in the film thickness is consistent with that of the plasma density along the tube axis for different RF power and pressure. Although the plasma density increases with higher tube biases, there is an optimal bias to obtain the highest deposition rate. It can be attributed to the reduction in self-sputtering of the copper electrode and re-sputtering effects of the deposited film at higher tube biases.

关键词： plasma distribution inner surface radio-frequency plasma

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Plasma-activated interfaces for biomedical engineering

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Bioactive Materials 2021年第7期6卷 2134-2143页

作者： Pei Liu Guomin Wang Qingdong Ruan kaiwei Tang Paul k.chu Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloon999077Hong KongChina

As an important phenomenon to monitor disease development,cell signaling usually takes place at the interface between organisms/cells or between organisms/cells and abiotic ***,finding a strategy to build the specific biomedical interfaces will help regulate information transmission and produce better therapeutic results to benefit *** the past decades,plasmas containing energetic and active species have been employed to construct various interfaces to meet biomedical demands such as bacteria inactivation,tissue regeneration,cancer therapy,and so *** on the potent functions of plasma modified surfaces,this mini-review is aimed to summarize the state-of-art plasma-activated interfaces and provide guidance to researchers to select the proper plasma and processing conditions to design and prepare interfaces with the optimal biological and related *** a brief introduction,plasma-activated interfaces are described and categorized according to different criteria including direct plasma-cells interfaces and indirect plasma-material-cells interfaces and recent research activities on the application of plasma-activated interfaces are *** authors hope that this mini-review will spur interdisciplinary research efforts in this important area and expedite associated clinical applications.

关键词： Plasma-assisted processes Bioactive interfaces Biomedical engineering

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Prediction and optimization of flue pressure in sintering process based on SHAP

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 346-359页

作者： Mingyu Wang Jue Tang Mansheng chu Quan Shi Zhen Zhang School of Metallurgy Northeastern UniversityShenyang 110819China Liaoning Low-Carbon Steelmaking Technology Engineering Research Center Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-Carbon Steelmaking(Ministry of Education) Shenyang 110819China

Sinter is the core raw material for blast *** pressure,which is an important state parameter,affects sinter *** this paper,flue pressure prediction and optimization were studied based on the shapley additive explanation(SHAP)to predict the flue pressure and take targeted adjustment ***,the sintering process data were collected and processed.A flue pressure prediction model was then constructed after comparing different feature selection methods and model algorithms using SHAP+extremely random-ized trees(ET).The prediction accuracy of the model within the error range of±0.25 kPa was 92.63%.SHAP analysis was employed to improve the interpretability of the prediction *** effects of various sintering operation parameters on flue pressure,the relation-ship between the numerical range of key operation parameters and flue pressure,the effect of operation parameter combinations on flue pressure,and the prediction process of the flue pressure prediction model on a single sample were analyzed.A flue pressure optimization module was also constructed and analyzed when the prediction satisfied the judgment *** operating parameter combination was then *** flue pressure was increased by 5.87%during the verification process,achieving a good optimization effect.

关键词： sintering process flue pressure shapley additive explanation prediction optimization

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