检索结果-内蒙古大学图书馆

Manganese-based oxides cathodes for potassium-ion batteries: a review

Journal of Energy Chemistry 2025年 108卷 1-18页

作者： Yue, Qinggang Xia, Maoting Zhou, Jiang Cheng, Juanjuan Lu, Bingan School of Physics and Electronics Hunan University Hunan Changsha410082 China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Hunan Changsha410082 China School of Materials Science and Engineering and Key Laboratory of Nonferrous Metal Materials Science and Engineering Ministry of Education Central South University Hunan Changsha410083 China School of Materials Science and Engineering Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion Hunan University of Science and Technology Hunan Xiangtan411201 China

Potassium-ion batteries (PIBs) were recognized for their natural abundance, high theoretical output voltage, and the availability of commercialized graphite anodes. However, the development of high-performance manganese-based layered oxide cathodes—a leading candidate for PIB systems—has been fundamentally constrained by irreversible phase transitions (PT) during the cycling process, manifesting as severe structural degradation and capacity fading. This review presents a transformative paradigm integrating machine learning (ML) with multiscale characterization to analyse the complex phase transition mechanisms in Mn-based cathodes. Through systematic ML-driven interrogation of structure–property relationships, we establish quantitative descriptors for phase stability and develop predictive models for transition dynamics. Furthermore, we highlight recent breakthroughs in cross-disciplinary approaches, enabling the rational design of PT-mitigated cathode architectures. By consolidating these insights into a unified knowledge framework, this work provides strategic guidelines for developing structurally robust Mn-based cathodes and outlines future research directions for next-generation PIB systems. © 2025 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences.

关键词： Setting

来源：评论

学校读者我要写书评

暂无评论

Enhancing the creep resistance in a RE-free cast Mg-Al-Ca alloy through microalloying of Ti

引用

Journal of Magnesium and Alloys 2025年第1期13卷 414-428页

作者： Zhuang Cui Yang Liu Ying Zeng Manping Liu Xiaochun Liu Shiwei Xu Xuefei Chen Qudong Wang School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China National Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Material Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Institute of Metals College of Material Science and EngineeringChangsha University of Science&TechnologyChangsha 410004China College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China

High temperature performance of magnesium alloys can be tailored by either grain size or precipitates in the grain *** this study,exceptional creep resistance was successfully acquired in a RE-free cast Mg-Al-Ca-Ti(AC51Ti)*** of Ti(0.01 wt.%)has been found to be beneficial to the improvement of the tensile creep resistance in a RE-free cast Mg-5Al-0.35Mn-(1Ca)(AC51)alloy,showing a low state creep rate(SCR)of 2.70×10^(−9)s^(−1)at 200℃/50 MPa,which is even better than that of many reported RE-containing Mg *** presence of trace Ti contributes to the substantial refinement and more uniform distribution of Al_(2)Ca precipitates in the *** the same time,the microalloying of Ti improves the solubility of Al and Ca in the *** is reasonable to believe that the microalloying of Ti induced re-organization of Al_(2)Ca precipitates,dissolved a larger amount of Al and Ca atoms into magnesium lattice,and increased the possibility of interaction between GB/dislocations and precipitates,which strongly correlates with the high temperature *** creep strengthening mechanisms primarily attributed to both second phase strengthening and solid solution strengthening were separately proposed based on the experimental investigations.

关键词： Magnesium alloy Creep mechanisms Al_(2)Ca phase Microalloying of Ti

来源：评论

学校读者我要写书评

暂无评论

Swelling and erosion assisted sustained release of tea polyphenol from antibacterial ultrahigh molecular weight polyethylene for joint replacement

引用

Chinese Chemical Letters 2025年第2期36卷 316-320页

作者： Yue Ren Kang Li Yi-Zi Wang Shao-Peng Zhao Shu-Min Pan Haojie Fu Mengfan Jing Yaming Wang Fengyuan Yang Chuntai Liu State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial EquipmentNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China Tianjian Laboratory of Advanced Biomedical Sciences Academy of Medical SciencesZhengzhou UniversityZhengzhou 450000China Department of Stomatology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450000China

The considerable hazard posed by periprosthetic joint infections underlines the urgent need for the rapid advancement of in-situ drug delivery systems within joint ***,the pursuit of sustained antibacterial efficacy remains a formidable *** this context,we proposed a novel strategy that leverages swelling and erosion mechanisms to facilitate drug release of drug-loaded ultrahigh molecular weight polyethylene(UHMWPE),thereby ensuring its long-lasting antibacterial *** oxide(PEO),a hydrophilic polymer with fast hydrating ability and high swelling capacity,was incorporated in UHMWPE alongside the antibacterial tea polyphenol(epigallocatechin gallate,EGCG as representative).The swelling of PEO enhanced water infiltration into the matrix,while the erosion of PEO balanced the release of the encapsulated EGCG,resulting in a steady *** behavior was supported by the EGCG release profiles and the corresponding fitted release kinetic *** demonstrated by segmented antibacterial assessments,the antibacterial efficiency was enhanced 2to 3 times in the PEO/EGCG/UHMWPE composite compared to that of EGCG/***,the PEO/EGCG/UHMWPE composite exhibited favorable biocompatibility and mechanical performance,making it a potential candidate for the development of drug-releasing joint implants to combat prosthetic bacterial infections.

关键词： Tea polyphenol Antibacterial PEO UHMWPE Joint replacement

来源：评论

学校读者我要写书评

暂无评论

Weakly solvating electrolyte enabling solvent-free co-intercalation for stable potassium-ion storage in graphite

引用

Nano Research 2025年第3期18卷 234-242页

作者： Chaojie Cheng Wencong Feng Feiyue Wang Jingke Ren Deyang Guan Wei Chen Jean-Jacques Gaumet Kai Fu Xiaobin Liao Wen Luo State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Xinjiang UniversityUrumqi 830017China Laboratoire de Chimie et Physique:Approche Multi-échelles des Milieux Complexes(LCP-A2MC)Institut Jean BarriolUniversitéde LorraineMetz 57070France

Ether electrolytes for potassium-ion batteries exhibit a broader electrochemical window and greater applicability,yet most of them are high-concentration electrolytes with elevated *** this study,we propose the use of a weakly solvating cyclic ether electrolyte with tetrahydropyran(THP)as the *** approach induces the formation of a thin and dense inorganic-rich solid electrolyte interphase(SEI)film,which is accompanied by a decrease in the activation energy of electrode interfacial reactions due to the weak ligand binding of THP with K^(+).Density functional theory(DFT)simulations also corroborate the hypothesis that K^(+)has a lower binding energy with *** potassium storage process,the phenomenon of solvent co-intercalation of graphite does not occur,which greatly reduces the destruction of the graphite structure and enables a superior electrochemical performance and enhanced cycling stability at a lower concentration(2 M).At a current density of 0.2 C(55.8 mA·g^(-1)),the battery can be stably cycled for 800 cycles(approximately 8 months)with a specific capacity of 171.8 mAh·g^(-1).This study provides a new ether-based electrolyte for potassium ion batteries and effectively reduces the electrolyte cost,which is expected to inspire further development of energy storage batteries.

关键词： weakly solvating electrolyte co-intercalation graphite potassium ion batteries

来源：评论

学校读者我要写书评

暂无评论

Deliberate design of MOF-based pre-catalyst rationalizing the structural reconstruction toward efficient oxygen evolution reaction

引用

Science China Chemistry 2025年第06期 2388-2398页

作者： Yunhui Chen Meng Tian Zhongqi Zhang Guangzhao Wang Yan Guo Jing Wu Dawei Qi Zhenhua Yan Xiangyu Liu Xi Liu State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia University Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing School of Electronic Information Engineering Yangtze Normal University Frontiers Science Center for New Organic Matter Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) State Key Laboratory of Advanced Chemical Power Sources College of Chemistry Nankai University School of Chemistry and Chemical Engineering In-situ Center for Physical Sciences Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University

Metal-organic frameworks （MOFs）,that have emerged as promising electrocatalysts in oxygen evolution reaction （OER）,usually undergo structural reconstruction to form metal hydroxides as active ***,it remains a great challenge to design and synthesize ideal MOF-based pre-catalysts for properly cognizing and utilizing the reconstruction process toward efficient OER ***,the well-defined MOF-808 is post-modified by 2-hydroxyphosphonoacetic acid （HPAA） to form a micro-adsorber that enables to capture of metal ions ***3+and Ni2+ions are synergistically anchored into the microadsorber,developing a Fe/Ni-containing pre-catalyst that can be dynamically electrooxidized to be an active and stable dual-site electrocatalyst denoted by R-MOF-HPAA@FeNi with abundant metal *** a result,R-MOF-HPAA@FeNi exhibits an excellent OER performance with a low overpotential of 272 mV and Tafel slope of 35.9 m V dec-1,as well as long-term stability over 300 h at 10 m A *** and theoretical calculations suggest the resulting catalyst mainly follows a lattice oxygen mechanism （LOM） of dual-metal-site mechanism （DMSM）.Owing to the chelating role of HPAA,the post-synthesized MOF-HPAA behaves as a trap to uniformly and firmly adhere Fe3+and Ni2+ions,leading to a functionalized MOF-based pre-catalyst which can be structurally evolved into atomic level-distributed OER electrocatalysts.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Transient Synchronization Stability Analysis and Assessment of DFIG System Under Severe Faults

arXiv

引用

arXiv 2025年

作者： Xu, Hongsheng Zhan, Meng State Key Laboratory of Advanced Electromagnetic Engineering and Technology Hubei Electric Power Security and High Efficiency Key Laboratory School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China

In the transient stability analysis of renewable energy grid-tied systems, although a large amount of works have devoted to the detailed electromagnetic transient simulation and the stability analyses of during-fault stage, the whole low-voltage ride through (LVRT) process and relevant transient stability mechanism remain to be uncovered. Taking the doubly fed induction generator system as the objective, this paper divides the transient processes into four different stages, including the pre-fault, during-fault, early post-fault, and late post-fault ones, establishes the full mechanism models for each stage, and studies the switching dynamics in detail. It is found that the during-fault dynamics can be determined by the phase-lock loop second-order equation within the framework of the generalized swing equation (GSE). For the early post-fault stage, it can be treated as a series of quasi-steady states and its dominant driving system dynamics can still be described by the GSE. Based on the local dynamics of unstable equilibrium point, the system transient stability can be completely determined by whether the initial state of the early post-fault stage is within or out of its basin of attraction (BOA). Based on these observations, the BOA-based and equal area criterion (EAC)-based transient stability assessment methods are developed, which are supported by broad numerical simulations and hardware-in-the-loop experiments. This work provides a clear physical picture and perfectly solves the difficult stability analysis problem when severe faults and LVRT have to be considered in most of DFIG engineering situations. Copyright © 2025, The Authors. All rights reserved.

关键词： Transient stability

来源：评论

学校读者我要写书评

暂无评论

Experimental evidence of aligning the m = 2/1 locked mode by RMP for improvement of mode suppression efficiency with electron cyclotron wave on J-TEXT

引用

The European Physical Journal Special Topics 2025年 1-15页

作者： Fang, Jiangang Chen, Zhongyong Yan, Wei Wang, Nengchao Mao, Feiyue Xuan, Zijian Ren, Zhengkang Chen, Xixuan Xia, Donghui Yang, Zhoujun Chen, Zhipeng Ding, Yonghua State Key Laboratory of Advanced Electromagnetic Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan People’s Republic of China

Stabilization of tearing modes, neoclassical tearing modes, and the locked modes (LMs) are of great importance for the tokamak plasma operation. The LMs will lead to the degradation of plasma confinement, which may cause major disruptions. The m/n = 2/1 LM islands have been completely suppressed by combination of electron cyclotron wave (ECW) and the externally applied resonant magnetic perturbation (RMP) on J-TEXT. The RMP is employed to control the phase of the 2/1 LMs and align the island’s O-point with the ECW deposition region. The J-TEXT experiment indicates that the 2/1 LM island suppression strategy can reduce the ECW power required for the mode suppression compared the suppression strategy when the island is rotating. Local heating within the magnetic island plays dominant roles on the mode suppression. The electron temperature information inside the magnetic island is provided by the electron cyclotron emission imaging diagnostic when the island is locked by RMP. The experimental results show that the temperature perturbation at the island’s O-point is larger when the island’s O-point is locked at the ECW deposition position than that when the mode is rotating. The effect of the RMP phase on the 2/1 LM suppression by ECW have been investigated. The LM suppression is most effective when the ECW power is properly aligned with the island’s O-point. Disruption avoidance by the suppression of the 2/1 LMs using ECW has been achieved on J-TEXT.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Directly Unveiling the Photothermal Corrosion of BiVO4 via In-situ Transmission Electron Microscopy

引用

Chemical Research in Chinese Universities 2025年第2期41卷 351-357页

作者： WANG Lindong SUN Jingyi WANG Lang LI Yu HU Zhiyi SU Baolian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering(ISME)Wuhan University of TechnologyWuhan 430070P.R.China Nanostructure Research Centre(NRC) Wuhan University of TechnologyWuhan 430070P.R.China CMI(Laboratory of Inorganic Materials Chemistry) University of Namurrue deBruxelles 61B-5000NamurBelgium

BiVO4(BVO)is widely utilized in photothermal catalysis because of its favorable bandgap structure(2.4 eV),excellent photo response capabilities and high thermal ***,the mechanism of BVO photothermal corrosion still remains unclear due to the lack of visualized characterization on the degradation process in real ***,we directly unveil the photothermal-induced microstructural evolution of BVO through in-situ heating(scanning)transmission electron microscopy[(S)TEM].The results indicate that the electrons are the initiating condition(“switch”)for the photothermal corrosion of BVO,resulting in the precipitation of Bi and reduction of V5+to V3+in the substrate,while the thermal field facilitates the evaporation of Bi and the recrystallization of *** work sheds light on the mechanism of BVO photothermal corrosion in dynamics and provides significant insights into the photothermal synergistic effects.

关键词： BiVO4 Photothermal corrosion In-situ transmission electron microscopy(TEM) Photothermal catalysis Structural evolution

来源：评论

学校读者我要写书评

暂无评论

Numerical simulation of the effect of hydrogen rich gas type and injection amount on the blast furnace tuyere raceway

引用

International Journal of Hydrogen Energy 2025年 133卷 261-275页

作者： Dang, Han Zhang, Cuiliu Zhang, Jianliang Xu, Runsheng Wang, Mingyong Jia, Guoli Lan, Dawei State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing100083 China School of Chemical Engineering The University of Queensland QLD4072 Australia Technology Research Institute of Shougang Group Co. LTD Shougang Group Co. LTD Hebei 050011 China

This study investigated a commercial blast furnace (BF) in China using a three-dimensional computational fluid dynamics (CFD) model that replicated the actual geometry of the coal lance, tuyere, and raceway. Focusing on the effects of natural gas (NG), coke oven gas (COG), and hydrogen (H2) within the raceway, the results revealed that hydrogen-rich gas injection increased the tuyere exit temperature, with NG demonstrating superior efficacy in elevating localized temperatures. However, higher volumes of injected hydrogen-rich gas were associated with reduced outlet temperatures and lower pulverized coal (PC) burnout rates. This phenomenon was attributed to the oxygen competition between gas combustion and PC oxidation, as hydrogen-rich fuels demanded greater oxygen allocation, thereby suppressing PC combustion efficiency. These findings establish a theoretical foundation for optimizing hydrogen-enriched gas injection strategies in BF ironmaking. © 2025 Hydrogen Energy Publications LLC

关键词： Pulverized fuel

来源：评论

学校读者我要写书评

暂无评论

Kerr-lens mode-locked Ho:CALYO laser at 2.1 µm

引用

Optics Express 2025年第8期33卷 18017-18023页

作者： Wang, Jing Yao, Weichao Liu, Jian Xu, Xiaodong Xu, Jun Leng, Yuxin State Key Laboratory of Ultra-intense Laser Science and Technology Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai201800 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China Jiangsu Key Laboratory of Advanced Laser Materials and Devices Jiangsu Normal University Xuzhou221116 China School of Physics Science and Engineering Institute for Advanced Study Tongji University Shanghai200092 China

We report on a Kerr-lens mode-locked Ho laser operating at 2.1 µm, based on a disordered structure crystal Ho:CALYO. The laser-generated ultrashort pulses with a pulse duration of 177 fs and an average output power of 0.81 W at a repetition rate of 90 MHz, with an optical-to-optical efficiency of 11%. By optimizing the system for shorter pulse durations, we achieved pulses as short as 166 fs, though at a reduced output power of 0.18 W. The pulse duration and output power limitations were analyzed and discussed. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Pulse repetition rate

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：