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Heterostructure:application of absorption-catalytic center in lithium-sulfur batteries

Rare Metals 2024年第4期43卷 1461-1487页

作者： Fei Wang chun-Man yang Yong-Qi Wang Dan You Wen-Hao yang Rong-Wei Huang Ji-Yue Hou Qian Wang Ying-Jie Zhang Ying Wang Yue-Jing Zeng Yi-Yong Zhang Xue Li National Local Joint Engineering Research Center for Lithium-Ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Batteries Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming650093China College of Electrical Information Engineering Panzhihua UniversityPanzhihua617000China State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Centre of Chemistry for Energy MaterialsState-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China

Due to the high theoretical specific capacity(1675 mAh·g^(-1)),low cost,and high safety of the sulfur cathodes,they are expected to be one of the most promising rivals for a new generation of energy storage ***,the shuttle effect,low conductivity of sulfur and its discharge products,volume expansion,and other factors hinder the commercialization of lithium-sulfur batteries(LSBs).The development of sulfur-fixing materials and the design of multifunctional materials to enhance the electrochemical performance of LSBs have been the main research priorities in recent *** of the advantages of high conductivity,built-in electric field,and good synergism,more and more researchers have employed heterostructure into sulfur-fixing materials to enhance the catalytic and absorption ability for *** this review,the principle of heterostructure and the mechanism of enhancing the performance of lithium-sulfur batteries are *** applications of heterostructure in cathode and interlayer of LSBs in the latest years are ***,the cutting-edge troubles and possibilities of heterostructures in LSBs are briefly presented.

关键词： Lithium-sulfur batteries(LSBs) Heterostructure Built-in electric field Catalytic Absorption

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散斑场的随机波数及其参量非线性效应

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物理学报 2024年第2期73卷 175-180页

作者：杨春林中国工程物理研究院激光聚变研究中心绵阳621900

散斑光场在非线性领域有特别的作用,它可用于抑制强光条件下的非线性过程.为了深入了解散斑的参量非线性作用机制,引入了具有波数失配的耦合波方程,讨论了方程的解,波数或位相匹配条件,波数不完全匹配时的增益阈值条件,以及完整解的待... 详细信息

散斑光场在非线性领域有特别的作用,它可用于抑制强光条件下的非线性过程.为了深入了解散斑的参量非线性作用机制,引入了具有波数失配的耦合波方程,讨论了方程的解,波数或位相匹配条件,波数不完全匹配时的增益阈值条件,以及完整解的待定系数.待定系数由边界场决定,如果边界的三个非线性波的复振幅都不为零,还存在边界位相匹配条件,满足该条件的待定系数最大.散斑光场的波数随机起伏,需要分段处理,这种波数随机起伏还会破坏边界位相匹配条件,从而抑制非线性增益.理论研究和数值计算的结果一致表明了散斑对受激布里渊散射参量过程的抑制作用.

关键词：散斑参量过程位相匹配

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一种新型共聚富马酸二甲酯聚羧酸保坍剂的合成及性能研究

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硅酸盐通报 2014年第9期33卷 2438-2444页

作者：王欣刘益军郑春扬江苏奥莱特新材料有限公司南京211500

本文用富马酸二甲酯、马来酸酐、异戊烯醇聚醚为聚合单体,甲基丙烯磺酸钠为链转移剂,采用水溶液共聚的方法合成了一种新型的聚羧酸保坍剂,同时研究了加入方式,反应单体的摩尔比例,链转移剂的用量,双氧水和抗坏血酸的摩尔比例,滴加时间,... 详细信息

本文用富马酸二甲酯、马来酸酐、异戊烯醇聚醚为聚合单体,甲基丙烯磺酸钠为链转移剂,采用水溶液共聚的方法合成了一种新型的聚羧酸保坍剂,同时研究了加入方式,反应单体的摩尔比例,链转移剂的用量,双氧水和抗坏血酸的摩尔比例,滴加时间,反应温度对聚羧酸保坍剂的影响,最佳的工艺条件为:n(TPEG)∶n(MAH)∶n(DMF)∶n(SMAS)=1∶1.6∶1.6∶0.2,n(HP)∶n(VC)=14∶1,滴加时间为3 h,反应温度为60℃,反应时间4 h,对合成出来的样品进行了混凝土性能测试,结果表明是一种保坍性能突出的聚羧酸保坍剂,并采用总有机碳法分析了不同样品在水泥颗粒表面的吸附量随时间的变化。

关键词：混凝土外加剂聚羧酸保坍剂保坍性能富马酸二甲酯

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原子荧光光谱法测定硒时铅的干扰和消除研究

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福建分析测试 2021年第6期30卷 1-6页

作者：郑春阳福建省地质测试研究中心福建福州350002

针对原子荧光法(AFS)测定硒时,铅(Pb)元素的存在会对硒(Se)的测定产生正干扰,使其结果偏高,影响测定结果的准确性。因此,当存在铅干扰情况时,需采用屏蔽剂以消除铅的干扰,才能够使测定结果准确可信。本方法通过实验研究了不同含量的铅对... 详细信息

针对原子荧光法(AFS)测定硒时,铅(Pb)元素的存在会对硒(Se)的测定产生正干扰,使其结果偏高,影响测定结果的准确性。因此,当存在铅干扰情况时,需采用屏蔽剂以消除铅的干扰,才能够使测定结果准确可信。本方法通过实验研究了不同含量的铅对AFS法测硒时所形成的信号干扰率大小,以及采用铁盐、硫脲—抗坏血酸和草酸溶液作为屏蔽剂来消除铅对AFS法测定硒时所产生的干扰。经过对比实验后表明,当采用草酸作为屏蔽剂能有效消除铅对AFS法测硒所产生的信号干扰,不会影响样品测试的稳定性和灵敏度,而且能够保障测定结果的准确。经实验得出其检出限为0.06μg/L,相对标准偏差(RSD)小于3%。

关键词：原子荧光光谱法硒铅正干扰铁盐硫脲—抗坏血酸草酸

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HG-AFS法同时测定土壤砷、汞研究

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福建农业科技 2020年第6期51卷 52-57页

作者：郑春阳福建省地质测试研究中心福建福州350002

采取氢化物发生——原子荧光光谱法同时测定土壤中砷和汞。结果表明:该方法砷的检出限为0.14 mg·kg^-1,汞的检出限为0.004 mg·kg^-1,标准曲线的相关性系数R均达到0.9999,砷、汞的精密度和准确度的相对标准偏差RSD均小于10%。该方法... 详细信息

采取氢化物发生——原子荧光光谱法同时测定土壤中砷和汞。结果表明:该方法砷的检出限为0.14 mg·kg^-1,汞的检出限为0.004 mg·kg^-1,标准曲线的相关性系数R均达到0.9999,砷、汞的精密度和准确度的相对标准偏差RSD均小于10%。该方法满足了农业地质对砷、汞分析测试的要求,具有推广的价值。

关键词：原子荧光光谱法砷汞土壤

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基于终端的查询算法的设计与实现

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计算机工程与应用 2002年第17期38卷 162-163页

作者：郑春杨学良中国科技大学研究生院计算机学部北京100039

通过对银行业务系统中开发的大量终端查询交易分析,提出了一种通用的查询交易平台。它提高了查询交易的开发速度,交易的稳定性,同时,有效地降低了网络上数据传输量,其通用性可适用于各种业务系统的查询交易。

关键词：终端查询算法设计计算机

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Basic Survey Scheduling for the Wide Field Survey Telescope(WFST)

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Research in Astronomy and Astrophysics 2024年第1期24卷 59-69页

作者： Yan-Peng Chen Ji-An Jiang Wen-Tao Luo Xian-Zhong zheng Min Fang Chao yang Yuan-Yu Hong Zong-Fei Lü Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China Department of Astronomy University of Science and Technology of ChinaHefei 230026China National Astronomical Observatory of Japan National Institutes of Natural Sciences2-21-1 OsawaMitakaTokyo 181-8588Japan Institute of Deep Space Sciences Deep Space Exploration LaboratoryHefei 230026China

Aiming at improving the survey efficiency of the Wide Field Survey Telescope, we have developed a basic scheduling strategy that takes into account the telescope characteristics, observing conditions, and weather conditions at the Lenghu site. The sky area is divided into rectangular regions, referred to as “tiles,” with a size of2°. 577 × 2°. 634 slightly smaller than the focal area of the mosaic CCDs. These tiles are continuously filled in annulars parallel to the equator. The brightness of the sky background, which varies with the moon phase and distance from the moon, plays a significant role in determining the accessible survey fields. Approximately 50connected tiles are grouped into one block for observation. To optimize the survey schedule, we perform simulations by taking into account the length of exposures, data readout, telescope slewing, and all relevant observing conditions. We utilize the Greedy Algorithm for scheduling optimization. Additionally, we propose a dedicated dithering pattern to cover the gaps between CCDs and the four corners of the mosaic CCD array, which are located outside of the 3° field of view. This dithering pattern helps to achieve relatively uniform exposure maps for the final survey outputs.

关键词： telescopes surveys Moon

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Sedimentary dynamics and depositional model for mud accumulation in deep lake basins:A case study in the Upper Triassic Chang-7 Member, Ordos Basin, northern China

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Journal of Palaeogeography 2024年第4期13卷 775-792页

作者： Wei Yu Feng Wang Jing-chun Tian Jiao Wang Benjamin Kneller Tian yang Wei-Zhen Chen College of Petroleum Engineering Shandong Institute of Petroleum and Chemical Technology Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources Chengdu University of Technology Institute of Sedimentary Geology Chengdu University of Technology University of Aberdeen School of Geoscience

Shales in deep lake basins have become the main focus of continental shale oil and gas exploration. In order to highlight the sedimentary dynamics of mud deposition in deep lake basins, a combination of core observation, thin section examination, X-ray diffraction, and QEMSCAN(quantitative evaluation of minerals by scanning electron microscopy) was used to analyze the depositional characteristics of mudrocks in the Chang-7 Member from the Yanchang Formation(Upper Triassic) in Ordos Basin, and to establish a depositional model for mud accumulation in deep lake basins. This study recognizes four mudrock lithofacies in the Chang-7 Member:(1) the laminated silt-bearing mudstone, which generally develops a binary composition of“silt-clay” or a ternary composition of “silt-clay-organic matter”;(2) the graded mudstone, mainly composed of dark gray and gray-black mudstone sandwiched by silt-bearing mudstone;(3) the massive mudstone, internally showing a uniform distribution of quartz, clay, and carbonate minerals, with also a small amount of organic detritus; and(4) the laminated shale, which is generally composed of clay laminae, and organic laminae of the former two. Sediment supply, topographic slope, and flood intensity combine to control the evolution of gravity flows and the transport and deposition of the mudrock in the Chang-7 Member. The influence of orogeny provides terrain gradient, water depth, abundant sediments at source areas, and triggering mechanism for the formation of gravity flows. Floods triggered by wetting events provide the impetus for sediment transport. Mud deposition in the Chang-7 Member was mainly related to the transport and sedimentation of mud by hyperpycnal flows and rapid sedimentation by buoyant plume flocculation. A comprehensive evolutionary model for shale accumulation in the deep lake basin is established by integrating various triggering mechanisms and mud transport sedimentary processes.

关键词： Mudrock Sedimentary dynamics mechanism Depositional model Chang-7 Member Depression lake basin

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基于TRIZ理论的发动机试验羽流压力测量系统改进

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航空学报 2024年第11期45卷 146-157页

作者：曹纯杨龙北京航天试验技术研究所北京100074

羽流压力是火箭发动机高空模拟试验测量的重要参数之一,能够有效地反映发动机的工作性能。针对某型号固体火箭发动机羽流高空模拟试验压力测量系统存在的未能测量到羽流场压力变化的问题,基于发明问题解决理论(TRIZ)分析系统存在的问题... 详细信息

羽流压力是火箭发动机高空模拟试验测量的重要参数之一,能够有效地反映发动机的工作性能。针对某型号固体火箭发动机羽流高空模拟试验压力测量系统存在的未能测量到羽流场压力变化的问题,基于发明问题解决理论(TRIZ)分析系统存在的问题,开展问题复现试验。依据问题定位结果,利用物理矛盾和物质-场模型的问题解决原理提出解决方案;并结合现场情况选择羽流压力测量系统的改进方案,对压力传感器内部电路进行绝缘处理,提升压力测量系统性能。改进后的系统满足发动机试验的羽流压力测量需求。

关键词：羽流压力测量发明问题解决理论(TRIZ) 因果链分析物理矛盾物质-场模型

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Electrical stress and acid orange 7 synergistically clear the blockage of electron flow in the methanogenesis of low-strength wastewater

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Environmental Science and Ecotechnology 2024年第4期20卷 291-299页

作者： Ze-Chong Guo Min-Hua Cui chun-Xue yang Hong-Liang Dai Tong-Yi yang Lin-Zhi Zhai Yong Chen Wen-Zong Liu Ai-Jie Wang School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang212100China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China Jiangsu Key Laboratory of Anaerobic Biotechnology Jiangnan UniversityWuxi214122China School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen518055China School of Geography and Tourism Harbin UniversityHarbin150001China School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan430074China

Energy recovery from low-strength wastewater through anaerobic methanogenesis is constrained by limited substrate *** development of efficient methanogenic communities is critical but *** we develop a strategy to acclimate methanogenic communities using conductive carrier(CC),electrical stress(ES),and Acid Orange 7(AO7)in a modified *** synergistic integration of CC,ES,and AO7 precipitated a remarkable 72-fold surge in methane production rate compared to the *** increase was attributed to an altered methanogenic community function,independent of the continuous presence of AO7 and ***7 acted as an external electron acceptor,accelerating acetogenesis from fermentation intermediates,restructuring the bacterial community,and enriching electroactive bacteria(EAB).Meanwhile,CC and ES orchestrated the assembly of the archaeal community and promoted electrotrophic methanogens,enhancing acetotrophic methanogenesis electron flow via a mechanism distinct from direct electrochemical *** collective application of CC,ES,and AO7 effectively mitigated electron flow impediments in low-strength wastewater methanogenesis,achieving an additional 34%electron recovery from the *** study proposes a new method of amending anaerobic digestion systems with conductive materials to advance wastewater treatment,sustainability,and energy self-sufficiency.

关键词： Methanogenesis Conductive carrier Electrical stress Acid orange 7 Electron transfer

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