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Advancements and Challenges in Organic–Inorganic Composite Solid Electrolytes for All‑Solid‑State Lithium Batteries

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Nano-Micro Letters 2025年第1期17卷 46-97页

作者： Xueyan Zhang Shichao Cheng Chuankai Fu Geping Yin Liguang Wang yongmin Wu Hua Huo State Key Laboratory of Space Power‑Sources School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310058People’s Republic of China State Key Laboratory of Space Power-Sources 2965 Dongchuan RoadMinhang DistrictShanghai 200240People’s Republic of China

To address the limitations of contemporary lithium-ion batteries,particularly their low energy density and safety concerns,all-solid-state lithium batteries equipped with solid-state electrolytes have been identified as an up-and-coming *** the various SEs,organic–inorganic composite solid electrolytes(OICSEs)that combine the advantages of both polymer and inorganic materials demonstrate promising potential for large-scale ***,OICSEs still face many challenges in practical applications,such as low ionic conductivity and poor interfacial stability,which severely limit their *** review provides a comprehensive overview of recent research advancements in ***,the influence of inorganic fillers on the main functional parameters of OICSEs,including ionic conductivity,Li+transfer number,mechanical strength,electrochemical stability,electronic conductivity,and thermal stability are systematically *** lithium-ion conduction mechanism of OICSE is thoroughly analyzed and concluded from the microscopic ***,the classic inorganic filler types,including both inert and active fillers,are categorized with special emphasis on the relationship between inorganic filler structure design and the electrochemical performance of ***,the advanced characterization techniques relevant to OICSEs are summarized,and the challenges and perspectives on the future development of OICSEs are also highlighted for constructing superior ASSLBs.

关键词： Composite solid electrolytes Inorganic filler Interfacial stability Li-ion conduction mechanism Characterization techniques

Breakdown of effective medium theory:A study of photonic spin Hall effect in deep-subwavelength all-dielectric multilayers

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 173-174页

作者： yongmin Liu Department of Mechanical and Industrial Engineering Northeastern UniversityBoston 02115USA Department of Electrical and Computer Engineering Northeastern UniversityBoston 02115USA

Effective medium theory(EMT)has been widely applied in material science,electromagnetics and photonics to determine the effective material properties for inhomogeneous composites comprising subwavelength *** versatility of this foundational approach has been established through its application in classical Maxwell-Garnet models,which encompass relatively simple structures。

关键词： composites theory dielectric

A data-efficient self-supervised deep learning model for design and characterization of nanophotonic structures

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Science China(Physics,Mechanics & Astronomy) 2020年第8期63卷 23-30页

作者： Wei Ma yongmin Liu College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027China Department of Mechanical and Industrial Engineering Northeastern UniversityMassachusetts 02115USA Department of Electrical and Computer Engineering Northeastern UniversityMassachusetts 02115USA

With its tremendous success in many machine learning and pattern recognition tasks,deep learning,as one type of data-driven models,has also led to many breakthroughs in other disciplines including physics,chemistry and material ***,the supremacy of deep learning over conventional optimization approaches heavily depends on the huge amount of data collected in advance to train the model,which is a common bottleneck of such a data-driven *** this work,we present a comprehensive deep learning model for the design and characterization of nanophotonic structures,where a self-supervised learning mechanism is introduced to alleviate the burden of data *** reflective metasurfaces as an example,we demonstrate that the self-supervised deep learning model can effectively utilize randomly generated unlabeled data during training,with the total test loss and prediction accuracy improved by about 15%compared with the fully supervised *** proposed self-supervised learning scheme provides an efficient solution for deep learning models in some physics-related tasks where labeled data are limited or expensive to collect.

关键词： nanophotonics metasurfaces self-supervised deep learning

Rapid Determination of Complete Distribution of Pore and Throat in Tight Oil Sandstone of Triassic Yanchang Formation in Ordos Basin, China

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Acta Geologica Sinica(English Edition) 2020年第3期94卷 822-830页

作者： DU Shuheng SHI yongmin State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China Oil and Gas Institute Peking UniversityBeijing 100871China

This study aimed to investigate the complete distribution of reservoir space in tight oil sandstone combining casting slices, field emission scanning electron microscopy(FE-SEM), the pore-throat theory model, high-resolution image processing, mathematical statistics, and other technical means. Results of reservoir samples from the Xin’anbian area of Ordos Basin showed that the total pore radius curve of the tight oil sandstone reservoir exhibited a multi-peak distribution, and the peaks appeared to be more focused on the ends of the range. This proved that pores with a radius of 1–50,000 nm provided the most significant storage space for tight oil, indicating that special attention should be paid to this range of the pore size distribution. Meanwhile, the complete throat radius curve of the tight oil sandstone reservoir exhibited a multipeak distribution. However, the peak values were distributed throughout the scales. This confirmed that the throat radius in the tight oil sandstone reservoir was not only in the range of hundreds of nanometers but was also widely distributed in the scale approximately equal to the pore size. The new rapid determination method could provide a precise theoretical basis for the comprehensive evaluation, exploration, and development of a tight oil sandstone reservoir.

关键词： complete distribution tight oil reservoir multi-precision imaging mathematical statistics

Broadband angular spectrum analog processors based on all-dielectric metasurfaces

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 188-190页

作者： Lin Deng yongmin Liu Department of Electrical and Computer Engineering Northeastern UniversityBoston 02115USA Department of Mechanical and Industrial Engineering Northeastern UniversityBoston 02115USA

Digital signal processors are extensively used to execute mathematical operations and advanced computational tasks on digital ***,they suffer from several inherent limitations,including low speed,high energy consumption,and large memory requirements,because of the hardware bottleneck and the imperative conversion between digital and analogue signals.

关键词： dielectric spectrum hardware

Research of Automated Test Case Generation for Spreadsheet Part in Document Format Translator

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Chinese Journal of Electronics 2014年第2期23卷 243-247页

作者： MU yongmin DING Yuan Beijing Information Science & Technology University

Document format translator can achieve information sharing and interoperability between the office document national standard UOF(Uniform office format) and the international standard ISO29500(Open office XML, OOXML). There are several difficult issues in the manual test of document format translator: the manual test case design is complicated due to the complexity of document standard; test case coverage rate is hard to evaluate and test blind spots are hard to avoid. This paper brings about methods to solve these problems by achieving automated test case generation. Analyzing the XML Schema of document standard in logical level, building UML object model in conceptual level, designing objectoriented algorithm based on *** platform, operate the underlying XML code of spreadsheet in physical level,and then compress underlying XML code to generate new spreadsheet documents as test case. A formal definition about the UOF document standard is presented and statistics of functional test point is conducted so as to measure test case coverage rate. Experiments have shown that this method can realize the automated generation of test cases,improve the efficiency of test work, decrease test case redundancy and avoid test blind spots.

关键词： Document format standard Office software Automated test case generation XML

Research of Reuse Technology of Test Case Based on Function Calling Path

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Chinese Journal of Electronics 2018年第4期27卷 768-775页

作者： MU yongmin GAO Xuexin SHEN Meie Computer School Beijing Information Science and Technology University

In the process of software testing, it requires a lot of manpower and time to design test *** cases of high similarities can be modified to reduce the workload of test case design, and improve the test efficiency. A test case reuse method based on function calling path is proposed. According to the change functions and the correlation functions it determined the changed path to be tested. It selected the function calling path which has high degree of similarity with the changed path to be tested from the original function calling path set. The collection of reusable test cases were determined according to mapping relationship between function calling path and test case, and the reusable test cases were modified to cover the change paths. Experimental results have validated the effectiveness of the proposed test case reuse method, and further reduce the workload of designing test cases and regression testing costs.

关键词： Regression testing Function calling path Test case reused

Effect of samarium doping on the activity and sulfur resistance of Ce/MnFeO_(x) catalyst for low-temperature selective catalytic reduction of NO_(x) by ammonia

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Chinese Journal of Chemical Engineering 2024年第7期71卷 272-282页

作者： Qiyao Zhang Shuangshuang Zhang Xu Hu yongmin Huang Key Laboratory of Specially Functional Polymeric Materials and Related Technology School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

The self-made MnFeO_(x) catalysts doped with cerium and samarium were prepared by impregnation method for low-temperature selective catalytic reduction(SCR)by *** this work,the surface properties of the series of MnFe-based catalysts were *** results indicate Sm-modified catalyst have superior low-temperature SCR activity;NO_(x) conversion maintained at nearby to 100%at 90℃ to 240℃.In addition,The N_(2) selectivity of Sm doping remains above 80%in the range of 60℃ to 150℃.In SO_(2) poisoning test,the NO_(x) conversion can be remained>90%after 10 h of *** XPS,NH_(3)-TPD and H_(2)-TPR results show the catalyst with Sm doping enhances the acid sites and oxidation catalytic sites of mixed oxides serves for improving oxygen vacancies and transfer *** situ diffuse reflaxions infrared Fourier transformations spectroscopy(DRIFTS)results show that NO_(x) is more easily adsorbed on the surface after Sm doping,which provided favorable conditions for the NH_(3)-SCR reaction to *** reaction at the catalyst surface will follow the L-H reaction mechanism by transient reaction test.

关键词： SCR Sm doping Catalyst Sulfur resistance In situ DRIFTS Selectivity

Investigation of particle-wall interaction in a pseudo-2D fluidized bed using CFD-DEM simulations

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Particuology 2016年第2期14卷 10-22页

作者： Tingwen Li yongmin Zhang Fernando Hernandez-Jimenez National Energy Technology Laboratory Morgantown WV26507 USA AECOM Morgantown WV 26507 USA State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China Universidad Carlos III of Madrid Department of Thermal and Fluid Engineering Av. de la Universidad 30 28911 Leganes Madrid Spain

We report on discrete element method simulations of a pseudo-two-dimensional （pseudo-2D） fluidized bed to investigate particle-wall interactions. Detailed information on macroscopic flow field variables, including solids pressure, granular temperature, and normal and tangential wall stresses are analyzed. The normal wall stress differs from the solids pressure because of the strong anisotropic flow behavior in the pseudo-2D system. A simple linear relationship exists between normal wall stress and solids pressure. In addition, an effective friction coefficient can be derived to characterize particle-wall flow interaction after evaluating the normal and tangential wall stresses. The effects of inter-particle and particle-wall friction coefficients are evaluated. Strong anisotropic flow behavior in the pseudo-2D system needs to be considered to validate the two-fluid model where the boundary condition is usually developed based on an isotropic assumption. The conclusion has been confirmed by simulation with different particle stiffnesses. Assumptions in the newly developed model for 2D simulation are further examined against the discrete element method simulation.

关键词： Gas-solid tlow Fluidized bed Computational fluid dynamics Discrete element method Particle-wall interaction Two-dimensional flow