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Viability of all-solid-state lithium metal battery coupled with oxide solid-state electrolyte and high-capacity cathode

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Journal of Energy Chemistry 2024年第4期91卷 122-131页

作者： xingxing Jiao Xieyu Xu Yongjing wang Xuyang wang Yaqi Chen Shizhao Xiong Weiqing Yang Zhongxiao Song Yangyang Liu Research Institute of Frontier Science Southwest Jiaotong UniversityChengdu 610031SichuanChina State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXi'an 710049ShaanxiChina Department of Physics Chalmers University of TechnologyGöteborgSE 41296Sweden

Owing to the utilization of lithium metal as anode with the ultrahigh theoretical capacity density of 3860 mA h g^(-1)and oxide-based ceramic solid-state electrolytes(SE),e.g.,garnet-type Li7La_(3)Zr_(2)O_(12)(LLZO),all-state-state lithium metal batteries(ASLMBs)have been widely accepted as the promising alternatives for providing the satisfactory energy density and safety.However,its applications are still challenged by plenty of technical and scientific issues.In this contribution,the co-sintering temperature at 500℃is proved as a compromise method to fabricate the composite cathode with structural integrity and declined capacity fading of LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM).On the other hand,it tends to form weaker grain boundary(GB)inside polycrystalline LLZO at inadequate sintering temperature for LLZO,which can induce the intergranular failure of SE during the growth of Li filament inside the unavoidable defect on the interface of SE.Therefore,increasing the strength of GB,refining the grain to 0.4μm,and precluding the interfacial defect are suggested to postpone the electro-chemo-mechanical failure of SE with weak GB.Moreover,the advanced sintering techniques to lower the co-sintering temperature for both NCM-LLZO composite cathode and LLZO SE can be posted out to realize the viability of state-of-the-art ASLMBs with higher energy density as well as the guaranteed safety.

关键词： All-solid-state lithium metal battery LiNi_(0.5C)o_(0.2)Mn_(0.3)O_(2)-Li7La_(3)Zr_(2)O_(12)composite cathode Co-sintering Lithium metal anode Electro-chemo-mechanical failure

An analytical transient coal permeability model:Sorption non-equilibrium index-based swelling switch

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1175-1191页

作者： xingxing Liu Jishan Liu Liang Chen Jinchang Sheng Huimin wang College of Civil and Transportation Engineering Hohai UniversityNanjing210098China School of Engineering The University of Western Australia35 Stirling HighwayCrawleyWA6009Australia College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing210098China

Long-term permeability experiments have indicated that sorption-induced swelling can switch from internal to bulk depending on the evolutive sorption status.However,this sorption swelling switch mechanism has not been considered in current analytical permeability models.This study introduces a normalized sorption non-equilibrium index(SNEI)to characterize the sorption status,quantify the dynamical variations of matrix swelling accumulation and internal swelling partition,and formulate the sorption swelling switch model.The incorporation of this index into the extended total effective stress concept leads to an analytical transient coal permeability model.Model results show that the sorption swelling switch itself results in the permeability switch under stress-constrained conditions,while the confined bulk swelling suppresses the permeability recovery to the continuous reduction under displacement-constrained conditions.Model verifications show that current experimental observations correspond to the early stages of the transient process,and they could be extended to the whole process with these models.This study demonstrates the importance of the sorption swelling switch in determining permeability evolution using simple boundary conditions.It provides new insights into experimentally revealing the sorption swelling switch in the future,and underscores the requirement of a rigorous model for complex coupled processes in large-scale coal seams.

关键词： Coal permeability Sorption swelling switch Sorption non-equilibrium Boundary conditions

Research on a Comprehensive Monitoring System for Tunnel Operation based on the Internet of Things and Artificial Intelligence Identification Technology

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Journal of Architectural Research and Development 2024年第2期8卷 84-89页

作者： xingxing wang Donglin Dai Xiangjun Fan China Merchants Chongqing Highway Engineering Testing Center Co. Ltd.Chongqing 400060China

This article proposes a comprehensive monitoring system for tunnel operation to address the risks associated with tunnel operations.These risks include safety control risks,increased traffic flow,extreme weather events,and movement of tectonic plates.The proposed system is based on the Internet of Things and artificial intelligence identification technology.The monitoring system will cover various aspects of tunnel operations,such as the slope of the entrance,the structural safety of the cave body,toxic and harmful gases that may appear during operation,excessively high and low-temperature humidity,poor illumination,water leakage or road water accumulation caused by extreme weather,combustion and smoke caused by fires,and more.The system will enable comprehensive monitoring and early warning of fire protection systems,accident vehicles,and overheating vehicles.This will effectively improve safety during tunnel operation.

关键词： Internet of Things Artificial intelligence Operation tunnel Monitoring

Novel silver nanoparticles loaded Cu-based metal organic framework as a promising antimicrobial material for controlling Escherichia coli O157:H7 in pork

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Food Science and Human Wellness 2024年

作者： Dongbo Yang Jing Yi Xiaoya Li Shuqi Zhang Yiming Xiang xingxing Liu Zhongguo Shan Haihua wang College of Food Science and Engineering Northwest A&F University

The risk of infection following consumption of foodborne pathogens contaminated foods became a significant concern for human health and imposes great economic losses to food industry. Herein， Ag nanoparticles were integrated to Cu-based metal–organic framework (Cu-MOF) for antibacterial activity. The crystal structure， morphology and composition of the prepared composite Ag@Cu-MOF were confirmed by XRD， TG， SEM， TEM， FTIR and XPS analysis. Antibacterial assays revealed that Ag@Cu-MOF exhibited increased inhibitory activity against Escherichia coli O157:H7 in comparison to Cu-MOF. Ag@Cu-MOF treated bacterial cells displayed distinct morphological changes， a decreased ratio of Live/Dead cells， as well as a reduction of intracellular adenosine 5’-triphosphate (ATP). Antibiofilm studies demonstrated that Ag@Cu-MOF could dramatically inhibit biofilm formation and disrupt preformed biofilms by interfering the metabolic activity and decreasing the expression of biofilm-associated genes. Food contamination model illustrated that Ag@Cu-MOF significantly prevented the growth of E. coli O157:H7 in packed pork. This study sheds light on the potential of Ag@Cu-MOF as a promising antimicrobial material for preserving pork.

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Controls on the Gas Hydrate Occurrence in Lower Slope to Basin-Floor,Northeastern Bay of Bengal

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Journal of Ocean University of China 2022年第4期21卷 813-826页

作者： LU Yintao LUAN Xiwu SHI Boqing FAN Guozhang RAN Weimin XU Ning wang Haiqiang SHAO Dali DING Liangbo wang xingxing Petrochina Hangzhou Research Institute of Geology Hangzhou 310023China School of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China China National Oil and Gas Exploration and Development Company Beijing 100031China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China College of Marine Science and Technology China University of GeosciencesWuhan 430074China

High resolution seismic data and newly acquired logging data reveal the presence of gas hydrates in the deep-water area in the northeastern Bay of Bengal.Bottom Simulating Reflectors(BSRs)appear at 430 ms beneath the seafloor,with the features of typical gas hydrates reported elsewhere except for some discontinuity.The BSR distribution is closely related to the position of anticline structures and turbidite channels.Anticlines provide conduits for the upward migration of gases from deeper intervals,while the turbidite sands within channels act as reservoirs for gas hydrate accumulation.High sedimentation rates in the Bengal Fan were ge-nerally favorable to produce a great amount of methane gas,providing favorable preconditions for the formation of gas hydrates.The discovery of gases in adjacent area indicates the contribution of the biogenic gas to the formation of gas hydrates.Meanwhile,seismic sections provide the evidence for the potential thermogenic gas kitchen in deep intervals.The anticline structures and the associated vertical fractures may constitute vertical fluid flowing conduits,which hydraulically connect the two deeper thermogenic petroleum systems(i.e.,rifting and Eocene-Oligocene source rocks)with the turbidite reservoirs and thus facilitate the fluid migration from the sources to the reservoirs,generating favorable conditions for gas-hydrate accumulation in such foreland setting.

关键词： Bay of Bengal gas hydrate anticline turbidite sands

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基于频域分析的高速列车侧风倾覆机理

西南交通大学学报 2024年第2期59卷 315-322,342页

作者：王铭李星星李小珍西南交通大学土木工程学院四川成都610031 中国铁路设计集团有限公司天津300308

侧风作用下列车的动态环境以轮轨相互作用为主向,以空气动力作用为主演变,列车的侧风倾覆行为成为威胁列车行车安全性的主要诱因.首先,采用精细化车-轨耦合模型开展列车侧风倾覆的频域特性分析,以明确侧风倾覆响应对列车模型的敏感性;... 详细信息

侧风作用下列车的动态环境以轮轨相互作用为主向,以空气动力作用为主演变,列车的侧风倾覆行为成为威胁列车行车安全性的主要诱因.首先,采用精细化车-轨耦合模型开展列车侧风倾覆的频域特性分析,以明确侧风倾覆响应对列车模型的敏感性;基于考虑模态特性的频域分析框架,推导脉动风及轨道不平顺与列车倾覆动力响应间的传递函数,结合相应参数进行分析,以直观揭示列车的侧风倾覆机理.结果表明:列车倾覆行为受绕车体下心侧滚模态和车体沉浮模态控制影响,其风荷载影响要明显大于轨道不平顺;在轨道不平顺激励下,第一阶模态贡献主要由轨向不平顺引起,第二阶模态贡献主要由高低不平顺引起,在脉动风荷载激励下,其顺风向脉动风分量起主要贡献;车速、风速和风向角的增大都会引起列车动力响应的增大,进而降低列车安全运营时的最大允许风速;失效概率的增大会降低动力响应的极值,进而提高安全运营风速.

关键词：风效应高速列车侧风倾覆危险性频域分析解析模型

Some logarithmic Minkowski inequalities for nonsymmetric convex bodies

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Science China Mathematics 2017年第10期60卷 1857-1872页

作者： wang xingxing XU WenXue ZHOU JiaZu School of Mathematics and Statistics Southwest UniversityChongqing 400715China Southwest Guizhou Vocational College of Technology for Nationalities Kaili 556000China

We prove some analogs inequalities of the logarithmic Minkowski inequality for general nonsymmetric convex bodies. As applications of one of those inequalities, the p-affine isoperimetric inequality and some other ine... 详细信息

关键词：对数不等式闵可夫斯基非对称凸体等周不等式类似仿射

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重新发现教:再论教与学的关系

湖南师范大学教育科学学报 2024年第1期23卷 16-24页

作者：王卫华徐星星湖南师范大学教育科学学院湖南长沙410081

教与学正在走向统一,在此过程中有一种以学替教的倾向。从历史上看,教与学一直都是相对独立的,相比较而言,中国古代更注重学,西方古代更注重教。自19世纪末20世纪初开始,西方由教转向学。教的不断弱化与退让,可能造成的风险是使教的概... 详细信息

教与学正在走向统一,在此过程中有一种以学替教的倾向。从历史上看,教与学一直都是相对独立的,相比较而言,中国古代更注重学,西方古代更注重教。自19世纪末20世纪初开始,西方由教转向学。教的不断弱化与退让,可能造成的风险是使教的概念名存实亡,教的实践活动备受困扰,教与学的关系也失去了应有的独立性。从现象学角度看教与学的关系共有四种类型,每一种类型都有相应的发生过程。由此,带给教与学的实践启示是注重教的独立性地位和独特性价值,使教与学的关系超越单一的统一,走向和而不同的“和美”境界。

关键词：教学教与学教学现象学

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CFRP叠层横向超声振动辅助铆接技术

锻压技术 2024年第1期49卷 154-164页

作者：王星星朱红萍宿迁学院机电工程学院江苏宿迁223800 沙洲职业工学院智能制造学院江苏张家港215600

针对碳纤维增强复合材料叠层钛合金铆钉铆接时出现的钛合金铆钉难变形、铆接干涉量不均匀等问题,提出了一种横向超声振动辅助铆接技术,以改善钛合金铆钉塑性、促进接头干涉量均匀分布。通过建立不同振幅和表面粗糙度的铆接实验,定量分... 详细信息

针对碳纤维增强复合材料叠层钛合金铆钉铆接时出现的钛合金铆钉难变形、铆接干涉量不均匀等问题,提出了一种横向超声振动辅助铆接技术,以改善钛合金铆钉塑性、促进接头干涉量均匀分布。通过建立不同振幅和表面粗糙度的铆接实验,定量分析了铆接相对干涉量、镦头尺寸偏差与形貌及力学性能。研究结果表明,振幅越大,相对干涉量越大,在振幅为21μm时可实现较为理想的相对干涉量配合,其相对干涉量范围在1.72%~1.54%之间;粗糙度对相对干涉量的影响较小,但粗糙度越大,塑性改善越显著,镦头尺寸偏差越大。此外,拉伸实验结果表明,普通铆接的最大拉伸载荷为4166.21 N,在振幅为26μm时横向超声振动辅助铆接的最大拉伸载荷为4562.32 N,提高了9.51%。

关键词：铆接超声振动碳纤维增强复合材料钛合金铆钉干涉量