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Reinforced Lewis covalent bond by twinborn nitride heterostructure for lithium-sulfur batteries

Journal of Energy Chemistry 2024年第1期88卷 363-372,I0009页

作者： Yaochen Song Pengkai Tang Yanjie Wang Yi Wang Linnan Bi Qi Liang Liang He Qingyu Xie yiyong zhang Peng Dong Yingjie zhang Yao Yao Jiaxuan Liao Sizhe Wang Yangtze Delta Region Institute(QuZhou) University of Electronic Science and Technology of ChinaQinzhou 324000ZhejiangChina School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093YunnanChina School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science&TechnologyXi’an 710021ShaanxiChina School of Environmental Science and Engineering North China Electric Power UniversityBaoding 071003HebeiChina

The practical application of lithium-sulfur(Li-S)batteries,as promising next-generation batteries,is hindered by their shuttle effect and the slow redox ***,a tungsten and molybdenum nitride heterostructure functionalized with hollow metal-organic framework-derived carbon(W_(2)N/Mo_(2)N)was proposed as the sulfur *** hollow spherical structure provides storage space for sulfur,enhances electrical conductivity,and inhibits volume *** metal atoms in the nitrides bonded with lithium polysulfides(Li PSs)through Lewis covalent bonds,enhancing the high catalytic activity of the nitrides and effectively reducing the energy barrier of Li PSs redox ***,the high intrinsic conductivity of nitrides and the ability of the heterostructure interface to accelerate electron/ion transport improved the Li+*** leveraging the combined properties of strong adsorption and high catalytic activity,the sulfur host effectively inhibited the shuttle effect and accelerated the redox kinetics of Li ***-efficiency Li+transmission,strong adsorption,and the efficient catalytic conversion activities of Li PSs in the heterostructure were experimentally and theoretically *** results indicate that the W_(2)N/Mo_(2)N cathode provides stable,and long-term cycling(over 2000 cycles)at 3 C with a low attenuation rate of 0.0196%per *** design strategy of a twinborn nitride heterostructure thus provides a functionalized solution for advanced Li-S batteries.

关键词： Heterostructure Adsorption Redox kinetics

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铱及铱合金涂层的研究现状与展望

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稀有金属 2024年第4期48卷 575-594页

作者：方镇王鑫张毅勇王浩旭金国胡振峰哈尔滨工程大学材料科学与化学工程学院黑龙江哈尔滨150001 军事科学院国防科技创新研究院北京100071

铱(Ir)是一种超高温抗氧化材料,其不但熔点高、硬度大,而且在高温下具有极强的稳定性和极低的氧渗透率。所以,Ir涂层被广泛地应用于碳基材料与难熔金属的高温防护方向,在航天领域的应用前景十分广阔。首先介绍了Ir涂层的多种制备技术,... 详细信息

铱(Ir)是一种超高温抗氧化材料,其不但熔点高、硬度大,而且在高温下具有极强的稳定性和极低的氧渗透率。所以,Ir涂层被广泛地应用于碳基材料与难熔金属的高温防护方向,在航天领域的应用前景十分广阔。首先介绍了Ir涂层的多种制备技术,对其中的几种重点制备技术进行了详细介绍,论述了不同制备技术的优缺点,介绍了制备技术的组合以及改进方式。并且对不同制备技术和不同制备条件下所制得Ir涂层的晶体微观结构进行了介绍,并论述了微观结构对涂层性能方面的影响,包括涂层的力学性能以及抗氧化性能等,最后总结了微观结构对涂层性能的影响规律。由于纯Ir涂层存在不足之处,介绍了应用表面合金化制备出的Ir合金涂层,并重点介绍了Ir-Al,Ir-Hf,Ir-Hf-Al和Ir-Hf-Zr等合金体系的性能和规律,探讨了未来多元Ir合金涂层的应用发展趋势。最后,对Ir及Ir合金涂层的研究进行了展望。

关键词：铱铱合金涂层熔盐电沉积

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Biomass-derived self-supporting sulfur host with NiS/C composite for high-loading Li-S battery cathode

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Science China(Technological Sciences) 2023年第1期66卷 181-192页

作者： LIU LuZhi XIA GuangHui WANG Ding HUANG JieMeng DUAN JianGuo zhang yiyong DONG Peng zhang YingJie National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China College of Materials Science and Engineering Sichuan UniversityChengdu 610065China

High sulfur loading is a practical way to realize the advantages of high energy density lithium-sulfur(Li-S)***,we report a biomass-derived flexible self-supporting carbon(SSC)coupled with Ni S/C used as a sulfur host for high-efficiency sulfur storage.A high areal sulfur loading of 5.3 mg cm-2can be achieved in the as-prepared composite host,and physical/chemical dual blocking effects for polysulfides are implemented in the SSC-Ni S/C *** 3D SSC with an interwoven structure offers a large surface area and wide internal space for sulfur ***,the powerful capability of physical immobilization/chemical anchoring of the polysulfides endowed by SSC and Ni S mitigates the shuttle *** compared electrodes with different current collectors,and the SSC-Ni S/C-1200 electrode material showed outstanding electrochemical performance,exhibiting a first specific capacity of 1268.36 m A h g-1at a high sulfur loading of 5.3 mg ***,the SSC-Ni S/C-1200 electrode exhibited a good remaining capacity of 555.15 m A h g-1at a current density of0.5 A g-1with a high sulfur loading of 3.3 mg cm-2after 300 *** addition,the active material loaded in the traditional way easily falls off when the conventional current collector is folded with increasing sulfur loading,but the flexible self-supporting carbon current collector can solve this *** study prepared a flexible free-standing 3D interconnected carbon current *** the introduction of amorphous carbon-coated Ni S,the self-supporting cathode SSC-Ni S/C-1200 achieved high sulfur loading that results in excellent electrochemical performance,providing a reference for future research on high sulfur loading in lithium-sulfur batteries.

关键词： lithium-sulfur batteries current collector biomass-derived carbon high sulfur loading cycling stability

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Application of MXenes in lithium-sulfur batteries

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Science China(Technological Sciences) 2022年第10期65卷 2259-2273页

作者： HOU JiYue WANG Ying YANG WenHao WANG Fei YANG Dong zhang yiyong LIANG Feng LI Xue zhang YingJie ZHAO JinBao National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China College of Electrical Information Engineering PanZhihua UniversityPanzhihua 617000China State Key Laboratory of Physical Chemistry of Solid Surfaces State-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleCollaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Although lithium-sulfur batteries are considered one of the most potential next-generation energy storage systems owing to their high-energy density, the dissolution and shuttle of intermediate lithium polysulfides primarily limit their commercial applications. Currently, the search for new materials for high-performance lithium-sulfur batteries has become a global research ***, two dimensional inorganic compound comprising several layers of transition metal carbide, nitride, or car-bonitride,are actively investigated owing to their large specific surface area, good conductivity, and excellent cycle and rate *** article firstly reviews the breakthrough of MXenes in lithium-sulfur batteries, introduces the preparation methods and structural characteristics, and summarizes the specific applications and modification mechanisms in lithium-sulfur ***, the characteristics and advantages of MXenes as a composite electrode material for lithium-sulfur batteries are highlighted. Finally, the potential in future commercial applications is summarized.

关键词： lithium-sulfur battery MXenes two-dimensional nanomaterials sulfur fixation performance sulfur fixation mechanism

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“因专施教”大学物理教学改革探究

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物理通报 2024年第9期 14-16,20页

作者：王强郝利丽张义勇刘超刘强东北石油大学物理与电子工程学院黑龙江大庆163318

在分析大学物理教学现状的基础上,提出“因专施教”精准式大学物理教学改革模式.以调研为依据制定符合各个专业特征的教学内容,突出级联问题驱动和案例教学相结合的教学法,实施过程考核、期末考核和专业关联考核相结合的综合考核模式,... 详细信息

在分析大学物理教学现状的基础上,提出“因专施教”精准式大学物理教学改革模式.以调研为依据制定符合各个专业特征的教学内容,突出级联问题驱动和案例教学相结合的教学法,实施过程考核、期末考核和专业关联考核相结合的综合考核模式,真正体现新工科建设过程中大学物理教学的基础作用和服务新工科的辅助功能.

关键词：新工科大学物理因专施教级联问题驱动案例教学

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Self-templating thermolysis synthesis of Cu2-xS@ M （M = C, TiO2, MoS2） hollow spheres and their application in rechargeable lithium batteries

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Nano Research 2018年第2期11卷 831-844页

作者： Yunhui Wang He Li yiyong zhang Yueying Peng Peng zhang Jinbao Zhao State Key Lab of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen China Collaborative Innovation Center of Chemistry for Energy Materials College of Chemistry and Chemical Engineering Xiamen University Xiamen China State-Province Joint Engineering Laboratory of Power Source Technology for New Energy Vehicle Xiamen University Xiamen China College of Energy Xiamen University Xiamen China

Owing to their unique structural stability and impressive long-term cycling performance, coated hollow structures are highly attractive for energy storage systems, especially batteries. Many efforts have been devoted and various strategies have been proposed to prepare such materials. In the present work, we propose a self-templating thermolysis strateg different from traditional wet processing methods, to fabricate cuprous sulfide hollow spheres coated with different shells, by exploiting the thermal decomposition properties of the core （CuS） and the protection provided by the shell. To demonstrate the generality of this synthetic approach, three different coating materials （carbon, TiO2, MoS2） have been chosen to prepare Cu2_S@C, Cu2_S@TiO2 and Cu2_xS@MoS2 hollow spheres. All synthesized composite materials were then assembled as electrodes and tested in lithium batteries, showing excellent cycling stability. In particular, the electro- chemical properties of Cu2_xS@C were thoroughly investigated. The results of this work provide an alternative route to prepare coated metal sulfide hollow soheres for enerL^v storage aoDlications.

关键词： self-templatingthermolysis sulfide hollow spheres lithium batteries

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The application of nanostructured transition metal sulfides as anodes for lithium ion batteries

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Journal of Energy Chemistry 2018年第6期27卷 1536-1554页

作者： Jinbao Zhao yiyong zhang Yunhui Wang He Li Yueying Peng State Key Laboratory of Physical Chemistry of Solid Surfaces State-Province Joint Engineering Laboratory of Power Source Technology for New Energy Vehicle Collaborative Innovation Center of Chemistry for Energy Materials College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 Fujian China

With wide application of electric vehicles and large-scale in energy storage systems, the requirement ofsecondary batteries with higher power density and better safety gets urgent. Owing to the merits of hightheoretical capacity, relatively low cost and suitable discharge voltage, much attention has been paid tothe transition metal sulfides. Recently, a large amount of research papers have reported about the appli-cation of transition metal sulfides in lithium ion batteries. However, the practical application of transitionmetal sulfides is still impeded by their fast capacity fading and poor rate performance. More well-focusedresearches should be operated towards the commercialization of transition metal sulfides in lithium ionbatteries. In this review, recent development of using transition metal sulfides such as copper sulfides,molybdenum sulfides, cobalt sulfides, and iron sulfides as electrode materials for lithium ion batteriesis presented. In addition, the electrochemical reaction mechanisms and synthetic strategy of transitionmetal sulfides are briefly summarized. The critical issues, challenges, and perspectives providing a fur-ther understanding of the associated electrochemical processes are also discussed.

关键词： Transition metal sulfides Lithium ion batter Anode

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Angiosperm-wide analysis of fruit and ovary evolution aided by a new nuclear phylogeny supports association of the same ovary type with both dry and fleshy fruits

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Journal of Integrative Plant Biology 2024年第2期66卷 228-251页

作者： Yezi Xiang Taikui zhang yiyong Zhao Hongjin Dong Hongyi Chen Yi Hu Chien-Hsun Huang Jun Xiang Hong Ma State Key Laboratory of Genetic Engineering Ministry of Education Key Laboratory of Biodiversity and Ecological EngineeringInstitute of Plant BiologyCenter of Evolutionary BiologySchool of Life SciencesFudan UniversityShanghai 200438China Department of Biology Howard Hughes Medical InstituteDuke UniversityDurhamNC 27708USA Department of Biology the Eberly College of Scienceand the Huck Institutes of the Life Sciencesthe Pennsylvania State UniversityUniversity ParkPA 16802USA Hubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization College of Biology and Agricultural ResourcesHuanggang Normal UniversityHuanggang 438000China

Fruit functions in seed protection and dispersal and belongs to many dry and fleshy types,yet their evolutionary pattern remains unclear in part due to uncertainties in the phylogenetic relationships among several orders and *** we used nuclear genes of 502 angiosperm species representing 231 families to reconstruct a well supported phylogeny,with resolved relationships for orders and families with previously uncertain *** this phylogeny as a framework,molecular dating supports a Triassic origin of the crown angiosperms,followed by the emergence of most orders in the Jurassic and Cretaceous and their rise to ecological dominance during the Cretaceous Terrestrial *** robust phylogeny allowed an examination of the evolutionary pattern of fruit and ovary types,revealing a trend of parallel carpel fusions during early diversifications in eudicots,monocots,and ***,taxa in the same order or family with the same ovary type can develop either dry or fleshy fruits with strong correlations between specific types of dry and fleshy fruits;such associations of ovary,dry and fleshy fruits define several ovaryfruit"modules"each found in multiple *** of the frequent modules has an ovary containing multiple ovules,capsules and berries,and another with an ovary having one or two ovules,achenes(or other single-seeded dry fruits)and *** new perspective of relationships among fruit types highlights the closeness of specific dry and fleshy fruit types,such as capsule and berry,that develop from the same ovary type and belong to the same module relative to dry and fleshy fruits of other modules(such as achenes and drupes).Further analyses of gene families containing known genes for ovary and fruit development identified phylogenetic nodes with multiple gene duplications,supporting a possible role of whole-genome duplications,in combination with climate changes and animal behaviors,in angiosperm fruit and ovary diversificat

关键词： angiosperm fruit evolution MADS-box molecular clock nuclear phylogeny ovary and fruit developmental genes

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吴其贞《书画记》信息缺失及错讹探讨从吴其贞与钱谦益说起

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新美术 2022年第5期43卷 138-152页

作者：张义勇山东艺术学院

一钱谦益徽州之行时间辨正吴其贞(1607—1678后),明末清初安徽休宁书画商人,四十余年行商于徽州与江苏、浙江之间,以其足迹所至,随手札录所阅及所购书画,裒辑而成《书画记》一书,为后世所重。书中也记载了不少与吴其贞有书画交往的名流... 详细信息

一钱谦益徽州之行时间辨正吴其贞(1607—1678后),明末清初安徽休宁书画商人,四十余年行商于徽州与江苏、浙江之间,以其足迹所至,随手札录所阅及所购书画,裒辑而成《书画记》一书,为后世所重。书中也记载了不少与吴其贞有书画交往的名流巨擘,钱谦益即其中之一。

关键词：书画记吴其贞信息缺失钱谦益安徽休宁徽州明末清初

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阿拉斯加2021年8.2级地震同震电离层扰动特征及对比分析

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地球物理学报 2024年第2期67卷 461-476页

作者：罗亦泳吴大卫张立亭东华理工大学测绘工程学院南昌330013

为分析2021年7月29日阿拉斯加8.2级地震引起的电离层响应,利用地震附近的全球导航卫星系统(Global Navigation Satellite System,GNSS)观测数据估算电离层总电子含量(Ionospheric Total Electron Content,TEC)及同震电离层扰动(Coseismic Ionospheric Disturbances,CIDs).从多角度对CIDs的时空分布特征进行分析,并与阿拉斯加2018年7.9级走滑型地震以及2020年7.8级逆断层地震引起的CIDs对比.在地震西南方向探测到两类CIDs,最大扰动振幅约0.8 TECU(1 TECU=1016 el/m^(2)),并且在西南方向距离震中约1094 km的测高站EA653探测到CIDs.在震中西北、东北和北方向探测到传播速度相近的CIDs.根据CIDs的速度和频率大小将CIDs分为两类,第一类CIDs的传播速度为1.87 km·s^(-1),频率约为3.8 mHz,可能由地震声波引起,扰动量级最大;第二类CIDs的传播速度为0.85~1.09 km·s^(-1),中心频率约在3.0 mHz或者5.7 mHz附近,为地震声波引起的另一类电离层扰动.逆断层地震引起的CIDs比走滑型地震更加显著,表明地震引起的垂直地表运动在CIDs的形成中起主要作用.三次地震在西南方向均引起显著的CIDs,与地震破裂方向较为一致,该地区大地震引起的CIDs可能具有较为明显的方向性,具体形成机制有待于进一步研究.

关键词：同震电离层扰动电离层总电子含量全球导航卫星系统阿拉斯加地震

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