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Mini review:Strategies for enhancing stability of high-voltage cathode materials in aqueous zinc-ion batteries

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Chinese Chemical letters 2025年第1期36卷 214-224页

作者： lingjiang kou Yong Wang Jiajia Song Taotao Ai Wenhu li Mohammad Yeganeh Ghotbi Panya Wattanapaphawong Koji Kajiyoshi School of Materials Science and Engineering Shaanxi University of TechnologyHanzhong 723000China Research laboratory of Hydrothermal Chemistry Faculty of Science and TechnologyKochi UniversityKochi 780-8081Japan Institute of Power Engineering(IPE) Universiti Tenaga NasionalKajangSelangor 43000Malaysia Materials Engineering Department Faculty of EngineeringMalayer UniversityMalayerIran

As battery technology evolves and demand for efficient energy storage solutions,aqueous zinc ion batteries(AzIBs)have garnered significant attention due to their safety and environmental ***,the stability of cathode materials under high-voltage conditions remains a critical challenge in improving its energy *** review systematically explores the failure mechanisms of high-voltage cathode materials in AzIBs,including hydrogen evolution reaction,phase transformation and dissolution *** address these challenges,we propose a range of advanced strategies aimed at improving the stability of cathode *** strategies include surface coating and doping techniques designed to fortify the surface properties and structure integrity of the cathode materials under high-voltage ***,we emphasize the importance of designing antioxidant electrolytes,with a focus on understanding and optimizing electrolyte decomposition *** review also highlights the significance of modifying conductive agents and employing innovative separators to further enhance the stability of *** integrating these cutting-edge approaches,this review anticipates substantial advancements in the stability of high-voltage cathode materials,paving the way for the broader application and development of AzIBs in energy storage.

关键词： Aqueous zinc ion battery High-voltage cathode materials Stability enhancement Failure mechanisms Electrolyte optimization

Theoretical Study of the Spectroscopic Properties of a Series of Makaluvamines in the Ultra-Violet Visible Range Using DFT (B3lYP) and TD-DFT Methods

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Spectral Analysis Review 2025年第1期8卷 1-15页

作者： Atse Adepo Jacques Diomande Sékou Alao latifatou laye Kone Soleymane laboratory of Constitution and Reaction of Matter UFR SSMT University Felix Houphout Boigny Abidjan Cte dIvoire Department of Agro-Industrial Sciences and Technologies (STAgI) UFR Agriculture Halieutic Resources and Agro-Industry University of San-Pdro San-Pdro Cte dIvoire

This work was carried out with the aim of contributing to the treatment of cancer. Cancer is one of the most common causes of death. It constitutes a public health problem. Photodynamic therapy (PDT) is one treatment option. This study contributes to the search for photosensitizing molecules used in PDT. Makaluvamines have shown interesting properties in the treatment of several human cancer cell lines. The present study analyzes the ultraviolet and visible absorption spectroscopic properties of a few Makaluvamines. These have been listed in the literature and can be in neutral or charged states (protonated and methylated). The investigation is based on quantum chemical calculations. Molecular geometries and vibrational frequencies have been calculated at the B3lYP/6-311++G(d,p) level. Absorption properties in the visible and ultraviolet spectral range are measured on optimized structures using time-dependent density functional theory (TD-DFT). The absorption spectra are obtained using the “Chemissian” software. The results of our calculations have allowed us to determine the absorption zones of the molecules studied, the energy gaps of the frontier orbitals, the main transitions associated with the absorption process, and their lifetimes. They have also identified four Makaluvamines (E, G, M, and l) that absorb in the therapeutic domain and may have photosensitizer properties.

关键词： Cancer Makaluvamines Density Functional Theory Time-Dependent Density Functional Theory Photosensitizer Absorption

数字化转型同群效应与企业突破式创新——基于连锁董事网络视角

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科学学与科学技术管理 2025年第1期46卷 3-20页

作者：寇明婷王宇飞梁奕北京科技大学经济管理学院

数字时代的到来在加速企业生产经营模式重大革新的同时，也为以技术突破和颠覆变革为目的的突破式创新提供了新的机遇。同时伴随数字技术的发展，企业间的微观网络联结关系不断扩大，企业的战略决策行为受到外部网络关系的影响愈加强烈... 详细信息

数字时代的到来在加速企业生产经营模式重大革新的同时，也为以技术突破和颠覆变革为目的的突破式创新提供了新的机遇。同时伴随数字技术的发展，企业间的微观网络联结关系不断扩大，企业的战略决策行为受到外部网络关系的影响愈加强烈并呈现出日益趋同的现象。因此，在探讨数字化转型战略时，企业微观网络关系的嵌入成为必要。以对企业战略决策具有重要作用的连锁董事为切入点，在连锁董事网络视角下，采用2011—2021年中国A股上市制造业企业为研究样本，实证探究数字化转型同群效应的存在性及其对企业突破式创新的影响，并明确其影响机制。研究发现：（1）同一连锁董事网络中的企业数字化转型存在显著的同群效应；（2）数字化转型同群效应能够显著促进企业突破式创新，在经过一系列稳健性检验和内生性测试后，该结果依旧可靠；（3）数字化转型同群效应可以通过缓解企业融资约束和提高企业创新吸收能力的方式进而促进企业突破式创新；（4）当企业位于连锁董事网络中心位置或结构洞位置时，数字化转型同群效应对企业突破式创新的促进作用得到加强。

关键词：数字化转型同群效应突破式创新连锁董事网络融资约束创新吸收能力

The Coupling Agents' Effects on the BSA Intercalated into Montmorillonite

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Journal of Wuhan University of Technology(Materials Science) 2013年第6期28卷 1236-1241页

作者： lü Yinghai YAN Huaxiao GAO Dengzheng HU Chuanxia kou Xiaoyan College of Chemical and Environmental Engineering Shandong University of Science and Technology

The effects of surface modification on montmorillonite （MMT） were illustrated in order to produce the composite material with premium properties. MMT was treated with two coupling agents： glutaraldehyde （GA） and 7-methacryloxy-propyl-trimethoxy silane （KH570）. The effects of different coupling agents on MMT and protein interaction were investigated by XRD, FT-IR, TGA, UV-Vis, etc. The results of structure characterization indicated that KH570 modification could change the surface crystal structure of MMT. However, GA reacted with amino groups of Bovine serum albumin （BSA） and the ordered layer structures of MMT were not completely destroyed. Coupling agents could greatly increase the amounts of BSA intercalated and the effect of KH570 is better than that of GA. And, the optimum concentrations of KH570 and GA were 2% and 6%, respectively. The rate of weight loss increased by about 12% after MMT was pretreated with coupling agents. The possible reason is that coupling agent treatment makes the structure of MMT more accessible to protein absorption and helps to stabilize the protein structure. Moreover,the presence of coupling agents can reduce the direct chemical interaction between BSA and MMT, which results in increasing protein desorption.

关键词： montmorillonite BSA coupling agents interaction

Pore Size Distribution of High Performance Metakaolin Concrete

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Journal of Wuhan University of Technology(Materials Science) 2002年第1期17卷 42-46页

作者： C.S.Poon S.C.kou l.lam Department of Civil and Structural Engineering The Hong Kong Polytechnic University Hong Kong China

The Compressive strength, porosity and pore size distribution of high performance metakaolin (MK) concrete were investigated. Concretes containing 0,5% , 10% and 20% metakaolin were prepared at a water / cementitious material ratio ( W/C) of 0. 30. In parallel, concrete mixtures with the replacement of cement by 20% fly ash or 5 and 10% silica fume were prepared for comparison. The specimens were cured in water at 27℃ for 3 to 90 days. The results show that at the early age of curing (3 days and 7 days), metakaolin replacements increase the compressive strength, but silica fume replacement slightly reduces the compressive strength. At the age of and after 28 days , the compressive strength of the concrete with metakaolin and silica fume replacement increases. A strong reduction in the total porosity and average pore diameter were observed in the concrete with MK 20% and 10% in the first 7 days.

关键词： high performance concrete metakaolin pore size distribution

Extraction of copper from copper-bearing biotite by ultrasonic-assisted leaching

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International Journal of Minerals,Metallurgy and Materials 2022年第2期29卷 212-217页

作者： Baoqiang Yu Jue kou Chunbao Sun Yi Xing School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China

Copper-bearing biotite is a refractory copper mineral found on the surface of the zambian *** is a copper oxide from which copper is extracted by various methods,especially by *** is the process of extracting a substance from a solid material dissolved in a *** improve the efficiency of the leaching process by a more effective method,a new method called ultrasonic-assisted acid leaching is proposed and applied in this *** with regular acid leaching,the ultrasound method reduced the leaching time from 120 to 40 min,and sulfuric acid concentration reduced from 0.5 to 0.3 mol·l^(-1).Besides,leaching temperature could be reduced from 75 to 45°C at the leaching rate of 78%.The mechanism analysis indicates that an ultrasonic wave can cause the delamination of a copper-bearing biotite and increase its specific surface area from 0.55 to 1.67 m^(2)·g^(-1).The results indicate that copper extraction from copper-bearing biotite by ultrasonic-assisted acid leaching is more effective than regular acid *** study proposes a promising method for recycling valuable metals from phyllosilicate minerals.

关键词： ultrasonic wave copper extraction delamination copper-bearing biotite

Rank-One Cross Commutators on Backward Shift Invariant Subspaces on the Bidisk

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Acta Mathematica Sinica,English Series 2009年第5期25卷 693-714页

作者： Kei Ji IzUCHI kou Hei IzUCHI Department of Mathematics Niigata University Graduate School of Science and Technology Niigata University Department of Mathematics Graduate School of ScienceHokkaido University

For a backward shift invariant subspace N in H^2（Г^2）, the operators Sz and Sw on N are defined by Sz = PNTz｜N and Sw, = PNTw｜N, where PN is the orthogonal projection from l^2（Г^2） onto N. We give a characteri... 详细信息

关键词： backward shift invariant subspace invariant subspace Hardy space cross commutator rank-one operator

Vibration analysis of maglev three-span continuous guideway considering control system

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Journal of zhejiang University-Science A(Applied Physics & Engineering) 2008年第1期9卷 8-14页

作者： Yan-feng TENG Nian-guan TENG Xinojian kou School of Naval Ocean Architecture and Civil Engineering Shanghai Jiao Tong University Shanghai 200240 China

The dynamic interaction between maglev vehicle and three-span continuous guideway is discussed. With the consideration of control system, the dynamic interaction model has been developed. Numerical simulation has been performed to study dynamic characteristics of the guideway. The results show that bending rigidity, vehicle speed, span ratio and primary frequency all have important influences on the dynamic characteristics of the guideway and there is no distinct trend towards resonance vibration when fl/（v/l） equals 1.0. The definite way is to control impact coefficient and acceleration of the guideway. The conclusions can serve the design of high-speed maglev three-span continuous guideway.

关键词： Maglev transportation system Three-span continuous guideway Coupling dynamics Feedback control Numerical simulation

Electron capture in collisions of li3+ ions with ground and excited states of li atoms

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Chinese Physics B 2020年第1期29卷 246-253页

作者： M X Ma B H kou l liu Y Wu J G Wang Institute of Modern Physics Fudan UniversityShanghai 200433China Key laboratory of Nuclear Physics and Ion-beam ApplicationMOE Fudan UniversityShanghai 200433China Institute of Applied Physics and Computational Mathematics Beijing 100088China Kents Hill School 12 th GradeMaine 04349USA

The electron capture processes in collisions of li3+ion with li(1s22s)and li(1s22p0,1)are investigated by using the two-center atomic orbital close-coupling method in the energy range from 0.1 keV/u to 300 keV/*** interaction of the active electrons with the target ion is represented by a model *** present results for the li3+–li(1s22s)system are compared with the available theoretical data and general agreement is obtained for the high collision *** is also found that the total and partial electron capture cross sections are sensitive to the initial charge cloud alignment in the low energy region.

关键词： two-center atomic orbital closed coupling electron capture cross section