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Phase reconfiguration of heterogeneous CoFeS/CoNiS nanoparticles for superior battery-type supercapacitors

Journal of Energy Chemistry 2024年第9期96卷 217-225页

作者： lina Ma Fan li Min Zhou Jidong Dong Hao Luo Wei Zhang Wenchao Zhao xinliang li Zaixing Jiang Yudong Huang College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071ShandongChina School of Materials Science and Engineering Xiamen University of TechnologyXiamen 361024FujianChina Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037JiangusChina Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052HenanChina MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina Material Science and Engineering College Northeast Forestry UniversityHarbin 150040HeilongjiangChina

Developing advanced battery-type materials with abundant active sites,high conductivity,versatile morphologies,and hierarchically porous structures is crucial for realizing high-quality hybrid ***,heterogeneous FeS@NiS is synthesized by cationic Co doping via surface-structure *** density functional theory(DFT)theoretical calculations are firstly performed to predict the advantages of Co dopant by improving the OH^(−)adsorption properties and adjusting electronic structure,benefiting ions/electron *** dynamic surface evolution is further explored which demonstrates that CoFeS@CoNiS could be quickly reconstructed to Ni(Co)Fe_(2)O_(4)during the charging process,while the unstable structure of the amorphous Ni(Co)Fe_(2)O_(4)results in partial conversion to Ni/Co/FeOOH at high potentials,which contributes to the more reactive active site and good structural ***,the free-standing electrode reveals excellent electrochemical performance with a superior capacity(335.6 mA h g^(−1),2684 F g^(−1))at 3 A g^(−1).Furthermore,the as-fabricated device shows a quality energy density of 78.1 W h kg^(−1)at a power density of 750 W kg^(−1)and excellent cycle life of 92.1%capacitance retention after 5000 *** work offers a facile strategy to construct versatile morphological structures using electrochemical activation and holds promising applications in energy-related fields.

关键词： In-situ reconfiguration Heterogeneous design Battery-type supercapacitors Superior performance Sulphide

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ENERGY CONSERVATION FOR THE WEAK SOLUTIONS TO THE 3D COMPRESSIBLE NEMATIC liQUID CRYSTAL FLOW

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Acta Mathematica Scientia 2024年第3期44卷 851-864页

作者：谭忠李心亮杨惠 School of Mathematical Sciences Xiamen UniversityXiamen361005China Shenzhen Research Institute of Xiamen University Shenzhen518057China School of Mathematics and Statistics Shenzhen UniversityShenzhen518060China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen518060China

In this paper,we establish some regularity conditions on the density and velocity fields to guarantee the energy conservation of the weak solutions for the three-dimensional compressible nematic liquid crystal flow in... 详细信息

关键词： compressible nematic liquid crystal flow weak solutions energy conservation

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怎样的批评才是好的文学批评——兼评田崇雪《细品红楼小人物》

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常熟理工学院学报 2024年第1期38卷 104-108页

作者：李新亮盐城师范学院文学院江苏盐城224007

文学批评不是专业领域内理论论证的抽象思辨,而是与现实生活息息相关的审美之思。《细品红楼小人物》作为文学批评实现了回归文学、回归文本、回归生活的努力,展现了文学批评实现诗、思、史、情、理融会贯通的可能。这也为文学批评树立... 详细信息

文学批评不是专业领域内理论论证的抽象思辨,而是与现实生活息息相关的审美之思。《细品红楼小人物》作为文学批评实现了回归文学、回归文本、回归生活的努力,展现了文学批评实现诗、思、史、情、理融会贯通的可能。这也为文学批评树立了典范:好的文学批评是集批评的力度、宽度、深度、温度、风度五位一体的。

关键词：《细品红楼小人物》文学批评批评标准

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Subgrid-scale model based on the vorticity gradient tensor for rotating turbulent flows

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Acta Mechanica Sinica 2020年第3期36卷 692-700页

作者： Han Qi xinliang li Changping Yu LHD Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

A new subgrid-scale(SGS)stress model is proposed for rotating turbulent flows,and the new model is based on the traceless symmetric part of the square of the velocity gradient tensor and the symmetric part of the vorticity gradient tensor(or the so-called vorticity strain rate tensor).The new subgrid-scale stress model is taken into account the effect of the vortex motions in turbulence,which is reflected on the anti-symmetric part of the velocity gradient *** addition,the eddy viscosity of the new model reproduces the proper scaling as O(y^3)near the ***,the new SGS model is applied in large-eddy simulation of the spanwise rotating turbulent channel *** simulating cases are selected to test the new *** results demonstrate that the present model can well predict the mean velocity profiles,the turbulence intensities,and the rotating turbulence *** addition,it needs no a second filter,and is convenient to be used in the engineering rotational flows.

关键词： Large-eddy simulation Subgrid-scale model Rotating turbulent channel flow

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Direct numerical simulation of impinging shock wave and turbulent boundary layer interaction over a wavy-wall

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Chinese Journal of Aeronautics 2021年第5期34卷 350-363页

作者： Fulin TONG Dong SUN xinliang li LHD Institute of MechanicsChinese Academy of SciencesBeijing 100190China State Key Laboratory of Aerodynamics China Aerodynamics Research and Development CenterMianvang 621000China Computational Aerodynamics Institute China Aerodynamics Research and Development CenterMicmyang 621000China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

The interaction of an impinging oblique shock wave with an angle of 30°and a supersonic turbulent boundary layer at Ma_(∞)=2.9 and Re_(θ)=2400 over a wavy-wall is investigated through direct numerical simulation and compared with the interaction on a flat-plate under the same flow conditions.A sinusoidal wave with amplitude to wavelength ratio of 0.26 moves in the streamwise direction and is uniformly distributed across the spanwise *** influences of the wavy-wall on the interaction,including the characterization of the flow field,the skin-friction,pressure and the budget of turbulence kinetic energy,are systematically *** region of separation grows slightly and decomposes into four *** peaks of skin-friction are observed at the rear part of the interaction *** low-frequency shock motion can be seen in the wall pressure *** of the turbulence kinetic energy budget indicate that both diffusion and transport significantly increase near the crests,balanced by an amplified dissipation in the near-wall *** orthogonal decomposition analyses show that the most energetic structures are associated with the separated shock and the shear layer over the *** the bubbles in the first two troughs are dominated by a low-frequency enlargement or shrinkage.

关键词： Direct numerical simulation Low-frequency unsteadiness Shock waves Turbulent boundary layer Wavy-wall

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Characteristics of reattached boundary layer in shock wave and turbulent boundary layer interaction

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Chinese Journal of Aeronautics 2022年第6期35卷 172-185页

作者： Fulin TONG Junyi DUAN xinliang li State Key Laboratory of Aerodynamics China Aerodynamics Research and Development CenterMianyang 621000China Computational Aerodynamics Institute China Aerodynamics Research and Development CenterMianyang 621000China LHD Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

The reattached boundary layer in the interaction of an oblique shock wave with a flatplate turbulent boundary layer at Mach number 2.25 is studied by means of Direct Numerical Simulation(DNS).The numerical results are carefully compared with available experimental and DNS data in terms of turbulence statistics,wall pressure and skin *** coherent vortex structures are significantly enhanced due to the shock interaction,and the reattached boundary layer is characterized by large-scale structures in the outer *** space-time correlation of fluctuating wall shear stress and streamwise velocity fluctuation reveals that the structural inclination angle exhibits a gradual decrease during the recovery *** scale interactions are analyzed by using a twopoint amplitude modulation correlation.A possible mechanism is proposed to account for the strong amplitude modulation in the downstream ***,the mean skin-friction is decomposed to understand the physically informed *** the upstream Turbulent Boundary Layer(TBL),the contribution associated with the Turbulence Kinetic Energy(TKE)production is greatly amplified,while the spatial growth contribution induced by the pressure gradient largely inhibits skin-friction *** on bidimensional empirical mode decomposition,the turbulence kinetic energy production contribution is further split into different terms with specific spanwise length scales.

关键词： Amplitude modulation Shock wave Skin friction decomposition Structural inclination angle Turbulent boundary layer

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Problems of the conventional BL model as applied to super/hypersonic turbulent boundary layers and its improvements

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Science China(Physics,Mechanics & Astronomy) 2011年第10期54卷 1889-1898页

作者： DONG Ming li xinliang Department of Mechanics Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Modern Engineering Mechanics Tianjin 300072China Key laboratory of High Temperature Gas Dynamics Institute of MechanicsChinese Academy of SciencesBeijing 100190China

Turbulence modeling has played important roles in solving engineering problems. However, with the development of aero-space technology, turbulence modeling faces new challenges. How to further improve turbulence modeling for su-per/hypersonic flows is an urgent problem. Through analyzing a set of data resulting from DNS and experiments, it is foundthat some most popular models suffer from essential flaws, and can be hardly improved following the traditional mode ofthinking. On the contrary, the BL model, which is one of the simplest and widely-used models, can be further improved. In thispaper, through analyzing results from DNS data, the main cause of the inaccuracy in applying the BL model to supersonic andhypersonic turbulent boundary layers is found to have resulted from the mismatch between the location of the matching pointof the inner and outer layers of the BL model determined by the conventional way and those given by DNS. Improvement onthis point, as well as other improvements is proposed. Its effectiveness is verified through the comparison with DNS results.

关键词： turbulence modeling supersonic hypersonic turbulent boundary layer DNS BL model

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Maximizing Terahertz Energy Absorption with MXene Absorber

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纳微快报:英文版 2023年第11期15卷 136-139页

作者： xinliang li Hao Luo Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052People’s Republic of China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450052People’s Republic of China

Achieving high absorption in broad terahertz bands has long been challenging for terahertz electromagnetic wave *** in Nature Photonics,Xiao et *** the high absorption approaching the theoretical upper limit across the whole terahertz band of MXene-based terahertz absorbers and,on this basis,constructed an applicable,updated alternating current impedance matching model.

关键词： Terahertz absorption MXene absorber Impedance matching Electron concentration Relaxation time

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DNS of a spatially evolving hypersonic turbulent boundary layer at Mach 8

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Science China(Physics,Mechanics & Astronomy) 2013年第7期56卷 1408-1418页

作者： liANG Xian li xinliang Laboratory of High Temperature Gas Dynamics Institute of MechanicsChinese Academy of Sciences

This paper reports the direct numerical simulation (DNS) for hypersonic turbulent boundary layer over a flat-plate at Ma∞ =8 with the ratio of wall-to-freestream temperature equal to 1.9, which indicates an extremely cold wall condition. It is primarily used to assess the wall temperature effects on the mean velocity profile, Walz equation, turbulent intensity, strong Reynolds analogy (SRA), and compressibility. The present high Mach number with cold wall condition induces strong compressibility effects. As a result, the Morkovin's hypothesis is not fully valid and so the classical SRA is also not fully consistent. However, some modified SRA is still valid at the far-wall region. It is also verified that the semi-local wall coordinate y* is better than conventional y+ in analysis of statistics features in turbulent boundary layer (TBL) in hypersonic flow.

关键词： DNS compressibility effects turbulent boundary layer

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Direct numerical simulation of passive scalar in decaying compressible turbulence

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Science China(Physics,Mechanics & Astronomy) 2004年第1期47卷 52-63页

作者： li xinliang FU Dexun MA Yanwen State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China

The passive scalars in the decaying compressible turbulence with the initial Reynolds number (defined by Taylor scale and RMS velocity) Re=72, the initial turbulent Mach numbers (defined by RMS velocity and mean sound speed) Mt=0.2—0.9, and the Schmidt numbers of passive scalar Sc=2—10 are numerically simulated by using a 7th order upwind difference scheme and 8th order group velocity control scheme. The computed results are validated with different numerical methods and different mesh sizes. The Batchelor scaling with k -1 range is found in scalar spectra. The passive scalar spectra decay faster with the increasing turbulent Mach number. The extended self-similarity (ESS) is found in the passive scalar of compressible turbulence.

关键词： passive scalar, decaying compressible turbulence, direct numerical simulation.

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