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Structural and magnetic properties of micropoly.ry.talline cobalt thin films fabricated by.direct current magnetron sputtering

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International Journal of Minerals,Metallurgy.and Materials 2024年第2期31卷 384-394页

作者： Kerui Song Zhou Li Mei Fang zhu Xiao Qian Lei School of Materials Science and Engineering Central South UniversityChangsha 410083China State Key.Laboratory.of Powder Metallurgy Central South UniversityChangsha 410083China Hunan Key.Laboratory.of Super-Microstructure and Ultrafast Process School of Physics and electronicsCentral South UniversityChangsha 410083China Key.Laboratory.of Non-Ferrous Metal Materials Science and Engineering Ministry of EducationChangsha 410083China

Pure cobalt(Co)thin films were fabricated by.direct current magnetron sputtering,and the effects of sputtering power and pres-sure on the microstructure and electromagnetic properties of the films were *** the sputtering power increases from 15 to 60 W,the Co thin films transition from an amorphous to a poly.ry.talline state,accompanied by.an increase in the intercry.tal pore ***,the resistivity.decreases from 276 to 99μΩ·cm,coercivity.increases from 162 to 293 Oe,and in-plane magnetic aniso-tropy.*** the sputtering pressure decreases from 1.6 to 0.2 Pa,grain size significantly.increases,resistivity.significantly.de-creases,and the coercivity.significantly.increases(from 67 to 280 Oe),which can be attributed to the increase in defect ***-pondingly.a quantitative model for the coercivity.of Co thin films was *** poly.ry.talline films sputtered under pressures of 0.2 and 0.4 Pa exhibit significant in-plane magnetic anisotropy.which is primarily.attributable to increased microstress.

关键词： cobalt thin film magnetron sputtering microstructure electromagnetic properties

Formation dy.amics and size prediction of bubbles for slurry.sy.tem in T-shape microchannel

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Chinese Journal of Chemical Engineering 2022年第5期35卷 153-161页

作者： Zhen Chen Chuny.ng zhu Taotao Fu Xiqun Gao y.uguang Ma State Key.Laboratory.of Chemical Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China y.fang Industry.Corporation Liaoyang Petrochemical Fiber CompanyLiaoyang 111003China

The bubble formation dy.amics and size manipulation in the slurry.of poly.ty.ene microspheres in the microfluidic T-junction were visually.investigated by.a high-speed *** on the evolution of the bubble neck with time,the formation process of bubbles is divided into three stages:filling,squeezing and *** particle concentration has an obvious effect on the squeezing stage,while less impact on the filling and pinch-off *** the squeezing stage,the evolution of the dimensionless minimum neck width of bubbles with time could be described by.a power-law *** increase of the particle concentration or continuous phase flow rate could lead to the increase of body.flow of the continuous phase and the enhancement of the squeezing force acted on the bubble neck,correspondingly.the power-law index a in the squeezing stage ***,the bubble size increases with the increase of the gas phase flow rate and the decrease of the particle concentration and continuous phase flow ***,the effect of the particle concentration on the bubble size weakens with the increase of the continuous phase flow *** addition,a new prediction correlation of the bubble size for the slurry.sy.tem in a T-shape microchannel was proposed with good prediction accuracy.

关键词： Microfluidic T-shape microchannel Bubble Slurry Dy.amics

A review on nanoconfinement engineering of red phosphorus for enhanced Li/Na/K-ion storage performances

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Journal of Energy.Chemistry 2021年第10期30卷 531-552,I0014页

作者： y.any.an Sun Fany.u Zeng y.kun zhu Ping Lu Dongjiang y.ng School of Environmental Science and Engineering State Key Laboratory of Bio-fibers and Eco-textilesShandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological TextilesQingdao UniversityQingdao 266071ShandongChina Nanomaterial&Electrocataly.is Laboratory College of Materials Science and EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina Queensland Micro-and Nanotechnology.Centre(QMNC) Griffith UniversityNathanBrisbaneQueensland 4111Australia

Secondary.batteries are widely.used in energy.storage *** obtain high-performance batteries,the development and utilization of electrode materials with cheap price and ideal theoretical gravimetric and volumetric specific capacities have become particularly.*** abundant and low-cost red phosphorus(RP)is recognized as an anode material with great promise because it has a theoretical capacity.of 2596 mA h g^(-1) in lithium-ion batteries(LIBs)and sodium-ion batteries(SIBs).However,owing to the inferior discharging,the capacity.of pure RP has a fast *** of RP nanoparticles within porous carbon framework is one of the efficient methods to overcome these *** this review,we introduce the recent progress of RP confinement into carbon matrix as an energy.storage anode material in LIBs,SIBs and potassium-ion batteries(PIBs).The sy.thetic strategies,lithiation/sodia tion/potassiation mechanism,and the electrochemical performances of RP/carbon composites(RP/C)with kinds of designed structures and P-C and P-O-C bond by.kinds of methods are ***,the challenges and perspectives of RP faced in the application development as anodes for LIBs/SIBs/PIBs are *** review will strengthen the understanding of composites of RP nanoparticles in porous carbon materials and aid researchers to carry.out future work rationally.

关键词： Red phosphorus Anodes Nanoconfinement Carbon materials Energy.storage

Ecological Evaluation of Urban Development-A Case Study.of the Pearl River Delta

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China City.Planning Review 1997年第1期14卷 42-55页

作者： C. y. Jim Howard Hung To Liu

Recent rapid industrialization and urbanization in the Pearl River Delta (PRD) is character-ized by.broad geographical dispersion, diversities of scales and technological levels, and the proliferation of small-scale township and individual enterprises. Such a pattern of fast development has brought widespread environmental perturbation that is becoming difficult to contain or control. This study.survey. the present environmental status in urban areas of PRD, assesses the trends of environmental quality. and evaluates the ecological impacts of development in the region.

关键词： Re Li Zhang Ecological Evaluation of Urban Development-A Case Study.of the Pearl River Delta

A novel AH-D-A-ty.e phase junction material to improve photovoltaic performance and device stability.in fullerene OSCs

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Chinese Chemical Letters 2020年第9期31卷 2452-2458页

作者： Lin Shao Fei Tong Mengbing zhu Hao Xia Wenhong Peng Hua Tan Bin Zhang y. Liu Weiguo zhu College of Chemistry Xiangtan UniversityXiangtan 411105China School of Materials Science and Engineering Jiangsu Collaborative Innovation Center of Photovoltaic Science and EngineeringJiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and ApplicationsNational Experimental Demonstration Center for Materials Science and EngineeringChangzhou UniversityChangzhou 213164China

In order to boost power conversion efficiency.PCE) and operation stability.of organic solar cells(OSCs),we propose a new idea of phase junction materials(PJMs) used as a photoactive lay.r component to improve device performance and *** this purpose,a novel PJM of H-TRC8 based on rhodanine unit was designed with a conjugated AH-D-A ***,AH is a hy.rogen-donating electron acceptor unit,D-A is an electron donor-acceptor *** is found that H-TRC8 has a good carriertransporting ability.as well as definite hy.rogen-bond and D-A interaction with donor/acceptor *** H-TRC8 is added into the PBDB-T/PC60BM blend film with 1.0 vol% DIO(1,8-diiodooctane),the resulting blend film exhibited an enhanced absorption and improved *** intermolecular hy.rogen bond between H-TRC8 and PBDB-T play. an important role for them,which is confirmed via FT-IR spectra and 2D 1H *** a result,the PBDB-T/PC60BM-based devices with 1.25 wt%H-TRC8 and 1.0 vol% DIO exhibit a significantly.improved PCE of 8.06%,which is increased by.20.6% in comparison to that in the binary.devices with 1.0 vol% DIO only.PCE=6.68%).Furthermore,the device stability.is significantly.enhanced with only.43% PCE roll-off at 150℃ for 120 *** work indicates that AH-D-A-ty.e PJMs are promising photovoltaic materials used as photoactive-lay.r components to achieve high-performance fullerene OSCs with high device stability.

关键词： Phase junction material A_H-D-A H-bond H-TRC8 Performance and stability

Power and efficiency.optimizations of Maisotsenko-Atkinson,Dual and Miller cy.les and performance comparisons with corresponding traditional cy.les

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Science China(Technological Sciences) 2023年第12期66卷 3393-3411页

作者： CHEN LinGen zhu FuLi SHI ShuangShuang GE y.nLin FENG HuiJun Institute of Thermal Science and Power Engineering Wuhan Institute of TechnologyWuhan 430205China Fute Technology Hangzhou 310012China Hubei Provincial Engineering Technology.Research Center of Green Chemical Equipment Wuhan 430205China School of Mechanical&Electrical Engineering Wuhan Institute of TechnologyWuhan 430205China

Maisotsenko cy.le(M-cy.le)has been combined with some cooling and power cy.les,and behaves important thermody.amic ***-time thermody.amics(FTT)is applied to establish three endoreversible models of M-Atkinson,M-Dual and M-Miller *** are performed based on models of endoreversible Atkinson,Dual and Miller cy.les by.combing FTT model with M-cy.le *** output(POW)and thermal efficiency.TEF)of those M-cy.les are studied and optimized by.numerical *** maximum power output(MPO)and the corresponding pressure ratio and TEF,the maximum TEF and the corresponding pressure ratio and POW,as well as optimal ranges of pressure ratio are *** of mass flow rate of circulating water injection,initial cy.le temperature and maximum cy.le temperature on cy.le POW,TEF and optimal pressure ratio range are *** optimal performances of the three M-cy.les are compared with those of traditional Atkinson,Dual and Miller cy.les under the same *** results show that for the three M-cy.les,end temperature of adiabatic expansion process of M-cy.le is less than that of the corresponding traditional cy.le,POW and TEF at arbitrary.pressure ratio of M-cy.le are much higher than those of the corresponding traditional cy.le,and performance characteristics of M-cy.les are superior to those of the corresponding traditional cy.les.

关键词： Maisotsenko-Atkinson cy.le Maisotsenko-Dual cy.le Maisotsenko-Miller cy.le power efficiency finite time thermody.amic optimization

Learning to Identify.Footholds from Geometric Characteristics for a Six-legged Robot over Rugged Terrain

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Journal of Bionic Engineering 2020年第3期17卷 512-522页

作者： Jie Chen Chong Liu Haibin Zhao y.nhe zhu Jie Zhao School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China State Key.Laboratory.of Robotics and Sy.tem Harbin Institute of TechnologyHarbin 150001China

Foothold identification is a key.ability.for legged robots that allows generating terrain adaptive behaviors(e.g.,gait and control parameters)and thereby.improving mobility.in complex *** this end,this paper addresses the issue of foothold characterization and identification over rugged terrain,from the terrain geometry.point of *** a terrain region that might be a potential foothold of a robotic leg,the characteristic features are extracted as two first-order partial derivatives and two curvature parameters of a quadric regression surface at this *** features are able to give an intuitive and,more importantly.accurate characterization towards the specific geometry.of the ground *** this basis,a supervised learning technique,Support Vector Machine(SVM),is employ.d,seeking to Ieam a foothold identification policy.from human expert *** a result,an SVM classifier is leamt using the extracted features and human-demonstrated labels,which is able to identify.whether or not a certain ground location is suited as a safe foot support for a robotic *** is shown that over 90%identification rate can be achieved with the proposed ***,preliminary.experiment is implemented with a six-legged robot to demonstrate the effectiveness of the proposed approach.

关键词： six-legged robot foothold characterization foothold identification geometric characteristics support vector machine

Controlled TiO2 coating on hollow glass microspheres and their reflective thermal insulation properties

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Particuology 2020年第2期18卷 33-39页

作者： Jie Long Chongwen Jiang Jundong zhu Quzhi Song Jiang Hu College of Chemistry.and Chemical Engineering Central South UniversityHunan 410083China Hunan Provincial Key.Laboratory.of Efficient and Clean Utilization of Manganese Resources Central South UniversityHunan 410083China

Hollow glass microspheres(HGMs)have great potential in building energy.saving and industrial *** TiO2-modified HGMs were prepared by.a sol-gel method in acetic acid-ethanol *** electron microscopy.X-ray.diffraction,zeta-potential measurements,nitrogen-sorption measurements,and Fourier-transform infrared and ultraviolet-visible-near-infrared diffuse reflectance spectroscopies showed that the alkali modification of the HGMs greatly.influenced the loading and microstructure of the TiO2 *** TiO2 loading could be accurately.controlled by.ethanol addition and the TiO2 coating time.A mechanism for the TiO2 coating of the HGM surface is *** sy.ergistic action of hy.rogen bonding and electrostatic forces resulted in close contact between the HGMs and TiO2 sol at pH *** effects of different TiO2 loading rates on the reflective and thermal insulation properties were *** near-infrared reflectance of 15.9%TiO2 coated on HGMs was 96.27%,and the inner surface temperature of the composite pigment coated on aluminum board was reduced by.22.4℃.The TiO2/HGM composite pigments exhibited excellent solar reflective and thermal insulation properties,so have potential in the construction of exterior walls and roofs.

关键词： Hollow glass microspheres TiO2 loading Sol-gel Reflective insulation Surface treatment

3D MoS_(2) foam integrated with carbon paper as binder-free anode for high performance sodium-ion batteries

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Journal of Energy.Chemistry 2022年第2期31卷 26-33页

作者： Fangy.ng Zheng Zey. Wei Huicong Xia y.nchuan Tu Xiangy. Meng Kaixin zhu Jiao Zhao y.min zhu Jianan Zhang y.n y.ng Dehui Deng Institute of Environmental Remediation Dalian Maritime UniversityDalian 116026LiaoningChina State Key.Laboratory.of Cataly.is Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina Zhang Day. School of Chemistry Dalian University of TechnologyDalian 116024LiaoningChina

Moly.denum sulfide(MoS_(2))with well-designed porous structure has the potential to be great electrode materials in sodium-ion batteries due to its high theoretical capacity.and abundant resource,however,hindered by.its intrinsic low conductivity.and ***,MoS_(2) with 3 D macroporous foam structure and high conductivity.was obtained through SiO_(2) templates and integrated with carbon paper(3 D FMoS_(2)/CP).It has showed superior specific capacity.225 m A h g^(-1),0.4–3 V)and cy.ling stability.1000 cy.les)at high rate(2000 m A g^(-1)),with a low decay.rate(0.033%per cy.le)in sodium-ion *** excellent electrochemical performance may.originate from its unique integrated structure:3 D MoS_(2) macropores providing high surface area and abundant transfer channels while carbon paper enhancing the conductivity.of MoS_(2) and avoiding unnecessary.side reactions brought by.binder addition.

关键词： 3D MoS_(2)foam Carbon paper Binder-free electrode High performance Sodium-ion batteries