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Recent progress and strategies of cathodes toward polysulfides shuttle restriction for lithium-sulfur batteries

Rare Metals 2024年第9期43卷 4132-4161页

作者： xing-you rao Shuang-Fei Xiang Jian Zhou Zhen Zhang Xiang-Yu Xu Yuan-Yuan Xu Xin-Chi Zhou Zheng-Dao Pan Su-Chong Tan Shi-xing Dong Zhou-Lu Wang Yu-Tong Wu Yun-Lei Zhou Xiang Liu Yi Zhang Shan Jiang School of Energy Sciences and Engineering Nanjing Tech UniversityNanjing 211816China School of Materials Science and Engineering and Institute of Smart Fiber Materials Zhejiang Sci-Tech UniversityHangzhou 310018China JiangSu Sailboat Petrochemical Co. LtdLianyungang 222000China Hangzhou Institute of Technology Xidian UniversityHangzhou 311200China

Lithium-sulfur batteries(LSBs)have already developed into one of the most promising new-generation high-energy density electrochemical energy storage systems with outstanding features including high-energy density,low cost,and environmental ***,the development and commercialization path of LSBs still presents significant limitations and challenges,particularly the notorious shuttle effect triggered by soluble longchain lithium polysulfides(LiPSs),which inevitably leads to low utilization of cathode active sulfur and high battery capacity degradation,short cycle life,*** research efforts have been conducted to develop various sulfur host materials capable of effectively restricting the shuttle *** review firstly introduces the fundamental electrochemical aspects of LSBs,followed by a comprehensive analysis of the mechanism underlying the shuttle effect in Li–S batteries and its profound influence on various battery components as well as the overall battery ***,recent advances and strategies are systematically reviewed,including physical confinement,chemisorption,and catalytic conversion of sulfur hosts for restricting LiPSs shuttle *** interplay mechanisms of sulfur hosts and LiPSs are discussed in detail and the structural advantages of different host materials are ***,key insights for the rational design of advanced host materials for LSBs are provided,and the upcoming challenges and the prospects for sulfur host materials in lithium-sulfur batteries are also explored.

关键词： Lithium-sulfur batteries Polysulfides Shuttle effect Host

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Two new high-temperature molecular ferroelectrics[1,5-3.2.2-Hdabcn]X(X=ClO_(4)^(-),ReO_(4)^(-))

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Chinese Chemical Letters 2024年第6期35卷 234-238页

作者： Keke Han Wenjun rao Xiuli you Haina Zhang xing Ye Zhenhong Wei Hu Cai School of Chemistry and Chemical Engineering Nanchang UniversityNanchang 330031China Jiangxi Key laboratory of Organic Chemistry Jiangxi Science and Technology Normal UniversityNanchang 330013China

Molecular ferroelectrics have attracted much attention because of their excellent piezoelectricity,mechanical workability,and second harmonic ***,we successfully prepared two molecular ferroelectrics[1,5-3.2.2-Hdabcn]X(X=ClO_(4)^(-),1;ReO_(4)^(-),2)by reactions of a quasi-spherical amine 1,5-diazabicycle[3.2.2]nonane(1.5-3.2.2-dabcn)with HX aqueous *** 1 and 2 undergo hightemperature phase transitions at 381 K(1)and 396 K(2).Before and after the phase transition,they crystallize in the polar point group mm2,and the centrosymmetric point groups mmm and 4/mmm,*** to Aizu rules,these two compounds experience mmm Fmm2 and 4/mmm Fmm2 type ferroelectric phase transitions,*** ferroelectricity of both compounds is well expressed in their polycrystalline film at room temperature with low coercive voltages of 13 V for 1 and 25 V for *** piezoelectric force microscopy(PFM),the 180°anti-parallel ferroelectric domains and the reversible polarization switching can be clearly observed in 1 and *** high-temperature molecular ferroelectric material has great application potential in flexible materials,biomechanics,intelligent wearables and other fields.

关键词： Ferroelectric domains Quasi-spherical amine Phase transition Polarization

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Exact Boundary Synchronization for a Coupled System of Wave Equations with Neumann Boundary Controls

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Chinese Annals of Mathematics,Series B 2018年第2期39卷 233-252页

作者： Tatsien LI xing LU Bopeng rao Dedicated to Philippe G. Ciarlet on the occasion of his 80th birthda

In this paper, for a coupled system of wave equations with iNeumann boundary controls, the exact boundary synchronization is taken into consideration. Results are then extended to the case of synchronization by groups. Moreover, the determination of the state of synchronization by groups is discussed with details for the synchronization and for the synchronization by 3-groups, respectively.

关键词： Exact boundary synchronization, Exact boundary synchronization bygroups State of synchronization, State of synchronization by groups Coupled system of wave equations, Neumann boundary control

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利用广义Brauer集估计矩阵多项式特征值的界

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数学杂志 2025年第1期45卷 72-80页

作者：饶秀省齐雅茹内蒙古工业大学理学院内蒙古呼和浩特010051

本文研究了矩阵多项式特征值界的估计问题.利用广义Brauer集,获得了矩阵多项式特征值的估计集合,并讨论了该集合的闭性、对称性和有界性等性质.最后给出了具体的算例,比较了矩阵多项式的Brauer集与广义Brauer集在特征值估计方面的精确性.

关键词：矩阵多项式特征值估计广义Brauer集

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Experimental investigation of early assessment of corpora cavernosa fibrosis with two-dimensional shear wave elastography

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Asian Journal of Andrology 2022年第2期24卷 207-212页

作者： Li Yu Wan-Ting rao Jing-Dong Tang Jin-Fang xing Department of Special Inspection Shanghai Shibei Hospital of Jing’an DistrictShanghai 200435China Department of Medical Ultrasound Fudan University Pudong Medical CenterShanghai 201399China Shanghai Key Laboratory of Vascular Lesions Regulation and Remodeling Fudan University Pudong Medical CenterShanghai 201399China

This study explored the usefulness of two-dimensional shear wave elastography(2D-SWE)in the early assessment of corpora cavernosa fibrosis(CCF).New Zealand male rabbits were randomly assigned to an experimental group or a control *** human transforming growth factor beta 1(TGF-β1)was injected into the dorsal penis tissue of rabbits in the experimental *** ultrasound and 2D-SWE examinations were performed before and 20 days after *** histological analysis was performed by hematoxylin–eosin staining,sirius red staining,and *** of 2D-SWE examination results was performed using shear wave elastography quantitative measurement(SWQ).Histological analysis outcomes were the proportion of smooth muscle cells(SMCs),collagen fibers(CFs),collagen type I(Col I),and collagen type III(Col III),as well as the SMCs/CFs ratio,measured by sirius red *** histological analysis outcomes were the positive area proportion(PAP)of TGF-β1(PAPT),fibronectin(PAPF),and Col III(PAPC),measured by *** recombinant human TGF-β1 injection,SWQ was higher in the experimental group than that in the control group(P<0.001);however,there were no differences in conventional ultrasound *** were significant differences in histological outcomes between the two groups(all P<0.05).These results indicated that 2D-SWE was superior for identifying early histological changes in CCF.

关键词： collagen type I collagen type III elastography penis smooth muscle cells

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Electronic characteristic,tensile cracking behavior and potential energy surface of TiC(111)/Ti(0001)interface:A first principles study

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Chinese Journal of Aeronautics 2023年第9期36卷 451-463页

作者： Silong ZHANG Jibo WANG Lixiang rao Qizhen HE Xiaolei xing Yefei ZHOU Qingxiang YANG State Key Lab of Metastable Materials Science&Technology Hebei Key Lab for Optimizing Metal Product Technology and PerformanceCollege of Materials Science&EngineeringYanshan UniversityQinhuangdao 066004China College of Physics and Mechanical&Electrical Engineering Longyan UniversityLongyan 364012China College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China

The preparation of TiC coating on Ti alloy surface to improve the wear resistance has attracted attention from researchers in aerospace *** service life of TiC coating is related to the interfacial adhesion properties between TiC coating and Ti alloy ***,it is difficult to explain its interfacial adhesion mechanism by experimental *** on the termination of atoms on the TiC surface,two TiC/Ti interface models named as the C-terminated-TiC(111)/Ti(0001) and Ti-terminated-TiC(11)/Ti(0001) interface were constructed by *** interfacial electronic characteristic of C-Ti bond is a mixture of polar covalent and metal bonds,and that of Ti-Ti bond is the metal *** tensile strains of both C-terminated-TiC(111)/Ti(0001) and Ti-terminated-TiC(111)/Ti(0001) interface in the fracture stage are ranged from 12% to 14%.Their maximum tensile stresses are 16.201 GPa and 15.590GPa,*** sliding potential energy surface maximum of C-terminated-TiC(111)/Ti(0001) and Ti-terminated-TiC(111)/Ti(0001) interface are 5.387 J/m^(2) and 0.271 J/m^(2),*** the sliding potential barriers on the minimum energy path are 2.094 J/m2and 0.136 J/m^(2) with an ideal shear strength of 20.32 GPa and 1.61 GPa,*** summary,the interfacial adhesion property of C-terminated-TiC(111)/Ti(0001) interface is better than that of Ti-terminated-TiC(111)/Ti(0001) interface.

关键词： Electronic First-principles Potential energy surface Tensile TiC/Ti interface

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Analyzing the Effect of the Intra-Pixel Position of Small PSFs for Optimizing the PL of Optical Subpixel Localization

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Engineering 2023年第8期27卷 140-149页

作者： Haiyang Zhan Fei xing Jingyu Bao Ting Sun Zhenzhen Chen Zheng you Li Yuan Department of Precision Instrument Tsinghua UniversityBeijing 100084China State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua UniversityBeijing 100084China Beijing Advanced Innovation Center for Integrated Circuits Tsinghua UniversityBeijing 100084China Joint International Research Laboratory of Advanced Photonics and Electronics Beijing Information Science and Technology UniversityBeijing 100192China Beijing Institute of Control Engineering Beijing 100190Chin

Subpixel localization techniques for estimating the positions of point-like images captured by pixelated image sensors have been widely used in diverse optical measurement *** unavoidable imaging noise,there is a precision limit(PL)when estimating the target positions on image sensors,which depends on the detected photon count,noise,point spread function(PSF)radius,and PSF’s intra-pixel *** studies have clearly reported the effects of the first three parameters on the PL but have neglected the intra-pixel position ***,we develop a localization PL analysis framework for revealing the effect of the intra-pixel position of small *** accurately estimate the PL in practical applications,we provide effective PSF(e PSF)modeling approaches and apply the Cramér–rao lower *** on the characteristics of small PSFs,we first derive simplified equations for finding the best PL and the best intra-pixel region for an arbitrary small PSF;we then verify these equations on real ***,we use the typical Gaussian PSF to perform a further analysis and find that the final optimum of the PL is achieved at the pixel boundaries when the Gaussian radius is as small as possible,indicating that the optimum is ultimately limited by light ***,we apply the maximum likelihood *** combination with e PSF modeling allows us to successfully reach the PL in experiments,making the above theoretical analysis *** work provides a new perspective on combining image sensor position control with PSF engineering to make full use of information theory,thereby paving the way for thoroughly understanding and achieving the final optimum of the PL in optical localization.

关键词： Optical measurement Subpixel localization Precision limit optimization Small point spread functions Centroiding Star sensors

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Effect of Interchain Coupling on Quantum Lattice Fluctuation and Fluctuation Induced Interchain Order Transition in Trans-polyacetylene

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Chinese Physics Letters 1997年第9期14卷 694-697页

作者： ZENG Shang-you rao Xue-song WU Chang-qin SUN xin Department of Physics Fudan UniversityShanghai 200433

Based on the modified Su-Schrieffer-Heeger Harniltonian and by adding the interchain hopping term,we consider the effect of interchain coupling on quantum lattice fluctuation in *** has been found that the interchain coupling does not always weaken quantum lattice *** overcoming a barrier of 1 eV or so,the quantum lattice fluctuation can induce a transition of interchain *** physical meaning of these features is discussed.

关键词： order. quantum lattice

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A Novel Robust Zero-Watermarking Algorithm for Audio Based on Sparse Representation

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China Communications 2021年第8期18卷 237-248页

作者： Longting Xu Daiyu Huang xing Guo Wei rao Yunyun Ji Ruoyi Li Xiaochen Lu College of Information Science and Technology Donghua UniversityShanghai 200000China Tencent Ethereal Audio Lab China

Behind the prevalence of multimedia technology,digital copyright disputes are becoming increasingly *** digital watermarking prevention technique against the copyright infringement needs to be improved *** the proposed technologies,zero-watermarking has been favored *** order to improve the robustness of the zero-watermarking,a novel robust audio zerowatermarking method based on sparse representation is *** proposed scheme is mainly based on the K-singular value decomposition(K-SVD)algorithm to construct an optimal over complete dictionary from the background audio *** that,the orthogonal matching pursuit(OMP)algorithm is used to calculate the sparse coefficient of the segmented test audio and generate the corresponding sparse coefficient ***,the mean value of absolute sparse coefficients in the sparse matrix of segmented speech is calculated and selected,and then comparing the mean absolute coefficient of segmented speech with the average value of the selected coefficients to realize the embedding of *** results show that the proposed audio zerowatermarking algorithm based on sparse representation performs effectively in resisting various common *** with the baseline works,the proposed method has better robustness.

关键词： zero-watermarking K-singular value decomposition dictionary learning sparse representtion

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Atmospheric stable and fexible Sn-based perovskite solar cells via a bioinspired antioxidative crystal template

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Journal of Energy Chemistry 2022年第3期31卷 612-618,I0016页

作者： Rui Guo Li rao Qianjin Liu Hongyu Wang Chenxiang Gong Baojin Fan Zhi xing Xiangchuan Meng Xiaotian Hu School of Materials Science and Engineering Nanchang University999 Xuefu AvenueNanchang 330031JiangxiChina School of Future Technology Nanchang University999 Xuefu AvenueNanchang 330031JiangxiChina Institute of Polymers and Energy Chemistry Nanchang University999 Xuefu AvenueNanchang 330031JiangxiChina

Sn-based perovskite solar cells(PSCs)demonstrate a potential development in eco-friendly devices due to their ***,poor stability and crystalline quality are still the challenges for achieving high-performance and long-term operating *** this work,inspired by biological protein,nickelporphyrin(Ni-P)with electron cloud on conjugate ring is applied into Sn-based perovskite to prevent perovskite from being *** synergistic effect of water and oxygen is broken in grain boundaries and surface so that the stability of PSCs can be improved obviously,despite there is hardly any barrier for water to ***,the electron-rich molecules can passivate the defects of perovskite such as iodine ***,the ester group in Ni-P molecule can bind with SnI;to form complex and then restrain *** with the template effect of 2D molecular,the crystallization of perovskite films is ***,the Sn-based PSCs with Ni-P achieve a stabilized power conversion efficiency(PCE)of 7.79%with negligible hysteresis in fexible devices,***,the PSCs can maintain 80%of the pristine PCE after 300 h under air environment.

关键词： Lead-free Solar cell Flexible devices Molecular bionics Crystallization control

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