检索结果-内蒙古大学图书馆

Suppressing high voltage chemo-mechanical degradation in single crystal nickel-rich cathodes for high-performance all-solid-state lithium batteries

引用

Journal of Energy Chemistry 2025年第3期102卷 377-385页

作者： Yirong Xiao Le Yang Chaoyuan Zeng Ze Hua Shuangquan Qu Niaz Ahmad Ruiwen Shao Wen Yang Key Laboratory of Cluster Science of Ministry of Education Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Advanced Innovation Center for Intelligent Robots and Systems School of Medical TechnologyBeijing Institute of TechnologyBeijing 100081China School of Chemistry and Chemical Engineering Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island ResourcesCollaborative Innovation Center of Ecological CivilizationHainan UniversityHaikou 570228HainanChina

Sulfide-based all-solid-state lithium batteries suffer from electrochemo-mechanical damage to Ni-rich oxide-based cathode active materials(CAMs),primarily caused by severe volume changes,results in significant stress and strain,causes micro-cracks and interfacial contact loss at potentials>4.3 V(***/Li^(+)).Quantifying micro-cracks and voids in CAMs can reveal the degradation mechanisms of Ni-rich oxidebased cathodes during electrochemical ***,the origin of electrochemical-mechanical damage remains ***,We have developed a multifunctional PEG-based soft buffer layer(SBL)on the surface of carbon black(CB).This layer functions as a percolation network in the single crystal LiNi_(0.83)Co_(0.07)Mn_(0.1)O_(2)and Li_(6)PS_(5)Cl composite cathode layer,ensuring superior ionic conductivity,reducing void formation and particle cracking,and promoting uniform utilization of the cathode active material in all-solid-state lithium batteries(ASSLBs).High-angle annular dark-field STEM combined with nanoscale X-ray holo-tomography and plasma-focused ion beam scanning electron microscopy confirmed that the PEG-based SBL mitigated strain induced by reaction heterogeneity in the *** strain produces lattice stretches,distortions,and curved transition metal oxide layers near the surface,contributing to structural degradation at elevated ***,ASSLBs with a LiNi_(0.83)Co_(0.07)Mn_(0.1)O_(2)cathode containing LCCB-10(CB/PEG mass ratio:100/10)demonstrate a high areal capacity(2.53 mAh g^(-1)/0.32 mA g^(-1))and remarkable rate capability(0.58 mAh g^(-1)at 1.4 mA g^(-1)),with88%capacity retention over 1000 cycles.

关键词： Single crystal nickel-rich oxide cathode Lattice stretches and distortions Reaction heterogeneity Percolation network All-solid-state lithium batteries

来源：评论

学校读者我要写书评

暂无评论

Microstructure and mechanical properties of high-pressure sintered B6O-SiC nanocomposites

引用

材料科学技术（英文版） 2025年第1期204卷 238-244页

作者： Bin Zhang Rongxin Sun Pan Ying Song Zhao Yitong Zou Lei Sun Zihe Li Yufei Gao Mengdong Ma Lingyu Liu Chao Liu Bo Xu Center for High Pressure Science(CHiPS) State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China National Key Laboratory of Advanced Casting Technologies MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials TechnologyEngineering Research Center of Materials Behavior and DesignMinistry of Education Nanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Materials and Surface Technology(Ministry of Education) School of Materials Science and EngineeringXihua UniversityChengdu 610039China School of Materials Science and Engineering Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China

Boron suboxide(B6O)is recognized as a superhard material with a low mass density,high resistance to chemical wear,and excellent wear *** its desirable properties,the limited fracture tough-ness of B6O restricts its application in industrial *** study presents the structural and me-chanical characterization of B6O-SiC nanocomposites,which were synthesized via a high-pressure high-temperature sintering process of B6O powders and SiC *** sintering process induced fragmen-tation of SiC whiskers,resulting in the homogenous distribution of SiC fragments within the B6O *** increase in SiC content was observed to decrease the composite's hardness,while initially reducing then enhancing its *** nanocomposites containing 20 wt％and 30 wt％SiC whiskers exhibited significant improvements in fracture toughness,averaging 6.5 MPa m1/2 and 7.0 MPa m1/2,respectively-approximately threefold the toughness of polycrystalline B6O-while sustaining high hardness values of 36.3 GPa and 35.6 GPa on *** analyses revealed that the composites'superior me-chanical performance is due to the presence of strong grain boundaries,as well as a high density of nan-otwins and stacking *** findings demonstrate a viable method for producing B6O-based nanocom-posites with enhanced hardness and toughness,potentially expanding their industrial applicability.

关键词： B6O Ceramic nanocomposite Mechanical properties Microstructure

来源：评论

学校读者我要写书评

暂无评论

Water enhances photocatalytic activity for toluene selective oxidation in acetic acid solution

引用

Nano Research 2025年第3期18卷 223-233页

作者： Sheng Tian Jinxin Li Binghao Wang Xiong Wang Xingsheng Hu Huijuan Wang Lang Chen Shuang-Feng Yin Advanced Catalytic Engineering Research Center of the Ministry of Education State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China College of Chemistry and Chemical Engineering Central South University of Forestry and TechnologyChangsha 410004China

Photocatalytic oxidation of hydrocarbons to value-added oxygen-containing compounds is a green and sustainable ***,the efficient activation of C(sp^(3))-H bonds under mild conditions remains a significant *** this study,we prepared BiOBr/Bi_(2)MoO_(6)Z-scheme heterostructure for photocatalytic selective oxidation of toluene to benzaldehyde utilizing acetic acid as solvent.A small amount of water as an additive established an acidic environment to facilitate the formation of highly reactive hydroxyl radicals(·OH)through the O_(2)→·O_(2)^(−)→H_(2)O_(2)→·OH ***·OH together with photogenerated holes acted as reactive species dissociate C(sp^(3))-H bonds,which is regarded as the rate-determining step for this reaction,boosting photocatalytic *** to the reaction system without water,the conversion of toluene increased from 23.6%to 39.0%,reaching a toluene conversion rate of 6110μmol·g^(-1)·h^(-1).Additionally,there is a slight improvement in the selectivity of benzaldehyde.

关键词： photocatalytic oxidation of toluene H_(2)O acidic chemical environment hydroxyl radicals BiOBr/Bi_(2)MoO_(6)

来源：评论

学校读者我要写书评

暂无评论

Stability and Stabilization of Sampled-Data Based LFC for Power Systems:A Data-Driven Method

引用

IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 291-293页

作者： Yu-Long Fan Chuan-Ke Zhang Yong He the School of Automation China University of Geosciences the Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems the Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education IEEE

Dear Editor,This letter is concerned with stability analysis and stabilization design for sampled-data based load frequency control(LFC) systems via a data-driven method. By describing the dynamic behavior of LFC systems based on a data-based representation, a stability criterion is derived to obtain the admissible maximum sampling interval(MSI) for a given controller and a design condition of the PI-type controller is further developed to meet the required MSI. Finally, the effectiveness of the proposed methods is verified by a case study.

关键词： Sampled data control systems

来源：评论

学校读者我要写书评

暂无评论

Cr doping modification for tribological behavior of Cr/a-C multilayer coatings against PEEK under diverse operational conditions

引用

Friction 2025年第3期13卷 117-126页

作者： Xiaohui Zhou Yingpeng Zhang Hao Li Li Cui Wei Yang Aiying Wang Peng Guo Peiling Ke Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Considering the increasing demand for wearresistant materials used for various frictions with dynamic sealing parts,we employed hybrid magnetron sputtering technology to fabricate Cr/amorphous carbon(a-C)multilayered coatings with and without Cr doping for *** tribological behaviors of coatings paired with polyether ether ketone(PEEK)balls were investigated under different friction environments,including an evolving atmosphere,a NaCl solution,polyalphaolefin(PAO)oil,and water-in-oil(W/O).The results demonstrated that the tribological properties of all friction pairs were strongly influenced by the surrounding *** the atmosphere and in a NaCl solution,the addition of Cr promoted the formation of a-C-containing transfer films,thereby yielding stable and low friction ***,the dominant factor contributing to the tribological performance shifted from the coatings themselves to the PAO oil film with PAO *** the case of the W/O solution,both the facile reactivity of Cr and the intrinsic instability of the W/O mixture accelerated the presence of Cr_(2)O_(3),which caused more severe *** current observations not only identified the tribological failure mechanism of Cr/a-C coatings with and without Cr doping modifications in conjunction with their PEEK counterparts but also addressed the importance of designing and fabricating adaptive lubricant coatings for harsh multi-environment applications.

关键词： polyether ether ketone(PEEK) amorphous carbon polyalphaolefin(PAO)oil dynamic sealing tribo-chemistry

来源：评论

学校读者我要写书评

暂无评论

Three-dimensional fracture of UO_(2)ceramic pellets by phase field modeling

引用

Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 165-176页

作者： Wei Xiong Xuan Ye Hongzhang Cheng Xiaoming Liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy TechnologyKey Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing 100084China State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

Fracture is the primary failure type for the UO_(2)ceramic pellets,which are operated under irradiation and thermal processes,and physically confined by the *** this work,by combining closely coupled physical processes of heat conduction,heat transfer,and mechanical deformation with the cohesive phase field framework,we proposed a high-precision modeling of quasistatic cracking of three-dimensional(3D)UO_(2)ceramic fuel pellets under high temperature and *** simulation results agree well with the experimental results,indicating that the proposed method has the potential to capture 3D crack modes in the interested time ***,we studied the relation of the 3D fracture patterns of fuel pellets with the peak power *** was found that the power level plays a critical role in determining the competition between radial and circumferential cracks,as well as transverse penetrating cracks.

关键词： phase field method nuclear fuel pellet coupled thermo-mechanical model thermal fracture

来源：评论

学校读者我要写书评

暂无评论

Cellulose Elementary Fibrils as Deagglomerated Binder for High-Mass-Loading Lithium Battery Electrodes

引用

Nano-Micro Letters 2025年第5期17卷 281-296页

作者： Young-Kuk Hong Jung-Hui Kim Nag-Young Kim Kyeong-Seok Oh Hong-I Kim Seokhyeon Ryu Yumi Ko Ji-Young Kim Kwon-Hyung Lee Sang-Young Lee Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Republic of Korea Advanced Analysis and Data Center Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Ulsan Advanced Energy Technology R&D Center Korea Institute of Energy Research(KIER)Ulsan 44776Republic of Korea Department of Battery Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Republic of Korea

Amidst the ever-growing interest in high-mass-loading Li battery electrodes,a persistent challenge has been the insufficient continuity of their ion/electron conduction ***,we propose cellulose elementary fibrils(CEFs)as a class of deagglomerated binder for high-mass-loading *** from natural wood,CEF represents the most fundamental unit of cellulose with nanoscale *** preparation of the CEFs involves the modulation of intermolecular hydrogen bonding by the treatment with a proton acceptor and a hydrotropic *** elementary deagglomeration of the cellulose fibers increases surface area and anionic charge density,thus promoting uniform dispersion with carbon conductive additives and suppressing interfacial side reactions at ***,a homogeneous redox reaction is achieved throughout the *** resulting CEF-based cathode(overlithiated layered oxide(OLO)is chosen as a benchmark electrode active material)exhibits a high areal-mass-loading(50 mg cm^(-2),equivalent to an areal capacity of 12.5 mAh cm^(-2))and a high specific energy density(445.4 Wh kg–1)of a cell,which far exceeds those of previously reported OLO *** study highlights the viability of the deagglomerated binder in enabling sustainable high-mass-loading electrodes that are difficult to achieve with conventional synthetic polymer binders.

关键词： Cellulose elementary fibrils Deagglomeration Electrode binders Lithium batteries High-mass-loading

来源：评论

学校读者我要写书评

暂无评论

Effect of compact strip processing on segregation behavior and mechanical properties of Q&P steel

引用

Journal of Iron and Steel Research International 2025年第3期32卷 733-742页

作者： Ming-yue Yang Sheng-wei Wang Shui-ze Wang Yu-he Huang Xin-ping Mao Institute for Carbon Neutrality University of Science and Technology BeijingBeijing100083China Institute for Steel Sustainable Technology Liaoning Academy of MaterialsShenyang110000LiaoningChina Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing100083China

The microstructure and mechanical properties of the compact strip production(CSP)processed quenching and partitioning(Q&P)steels were investigated through experimental methods to address the challenge of designing high-performance Q&P *** with the conventional process(CP)produced samples,with slightly reduced strength,the total elongation of the CSP produced samples was increased by nearly 7%.Microstructural analysis revealed that variations in austenite stability were not the primary cause for the differences in mechanical properties between the CSP and the *** CSP processed Q&P steel exhibited milder center segregation behavior in contrast to the CP processed Q&P ***,in the CSP processed Q&P steel,a higher proportion of austenite and a lower proportion of martensite were observed at the center position,delaying the crack initiation in the central region and contributing to the enhanced *** investigation into the CSP process reveals its effect on alleviation of segregation and enhancement of mechanical properties of the Q&P steel.

关键词： Compact strip production Conventional process Segregation Martensite transformation Quenching and partitioning steel Retained austenite

来源：评论

学校读者我要写书评

暂无评论

Atomic origin of minor alloying element effect on glass forming ability of metallic glass

引用

Chinese Physics B 2025年第3期34卷 483-489页

作者： Shan Zhang Qingan Li Yong Yang Pengfei Guan Beijing Computational Science Research Center Beijing 100193China Department of Mechanical Engineering College of EngineeringCity University of Hong KongTat Chee AvenueKowloon TongKowloonHong KongChina Advanced Interdisciplinary Sciences Research(AiR)Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China

The glass-forming ability(GFA)of metallic glasses is a key scientific challenge in their development and application,with compositional dependence playing a crucial *** studies have demonstrated that the addition of specific minor elements can greatly enhance the GFA of parent alloys,yet the underlying mechanism remains *** this study,we use the ZrCuAl system as a model to explore how the addition of minor Al influences the crystallization rate by modulating the properties of the crystal-liquid interface,thereby affecting the *** results reveal that the minor addition of Al significantly reduces the crystal growth rate,a phenomenon not governed by particle density fluctuations at the *** impact of minor element additions extends beyond a modest increase in crystal-unfavorable motifs in the bulk supercooled *** importantly,it leads to a significant enrichment of these motifs at the crystal-supercooled liquid interface,forming a dense topological network of crystal-unfavorable structures that effectively prevent the growth of the crystalline interface and enhance *** results provide valuable insights for the design and development of high-performance metallic glasses.

关键词： metallic glass glass forming ability interface structure molecular dynamics(MD)

来源：评论

学校读者我要写书评

暂无评论

Effect of Carbon on the Microstructures and Stress Rupture Properties of a Polycrystalline Ni-Based Superalloy

引用

Acta Metallurgica Sinica(English Letters) 2025年第1期38卷 151-163页

作者： Han Wang Shijie Sun Naicheng Sheng Guichen Hou Jinguo Li Yizhou Zhou Xiaofeng Sun Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

The effect of carbon content on the microstructures and stress rupture properties of a newly developed polycrystalline Ni-based superalloy with high Cr content has been *** was observed that both grain size and the number of carbides increased with an increase in carbon *** heat treatment,granular M_(23)C_(6)carbides were dispersed around MC carbides along grain boundaries and inside *** quantity of granular M_(23)C_(6)carbides increased while their sizes *** findings can be verified with the results of thermodynamic calculation and differential scanning calorimetry *** stress rupture times(975℃/225 MPa)increased from 13.3 to 25.5 h with the carbon content increased from 0.1 to 0.2 wt.%.The improvement can be attributed to two primary ***,grain boundary is typically weak region during deformation process and the grain size increased as carbon content increased in the ***,carbides act as hindrances to impede dislocation movement,leading to dislocation *** carbon content rose,the quantity of carbides in interdendritic regions and grain boundaries increased,providing a certain degree of strengthening effect and resulting in a longer stress rupture time.

关键词： Ni-based superalloy Microstructure Stress rupture property Carbon Carbide

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：