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Vanadium oxide nanospheres encapsulated in N-doped carbon nanofibers with morphology and defect dual-engineering toward advanced aqueous zinc-ion batteries

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Journal of Energy Chemistry 2024年第2期89卷 599-609,I0013页

作者： yunfei song Laiying Jing Rutian Wang Jiaxi Cui Mei Li Yunqiang Zhang School of Materials Science and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353ShandongChina Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina

Vanadium-based electrodes are regarded as attractive cathode materials in aqueous zinc ion batteries(ZIBs)caused by their high capacity and unique layered ***,it is extremely challenging to acquire high electrochemical performance owing to the limited electronic conductivity,sluggish ion kinetics,and severe volume expansion during the insertion/extraction process of Zn^(2+).Herein,a series of V_(2)O_(3)nanospheres embedded N-doped carbon nanofiber structures with various V_(2)O_(3)spherical morphologies(solid,core-shell,hollow)have been designed for the first time by an electrospinning technique followed thermal *** N-doped carbon nanofibers not only improve the electrical conductivity and the structural stability,but also provides encapsulating shells to prevent the vanadium dissolution and aggregation of V_(2)O_(3)***,the varied morphological structures of V_(2)O_(3)with abundant oxygen vacancies can alleviate the volume change and increase the Zn^(2+)***,the phase transition between V_(2)O_(3)and Zn_XV_(2)O_(5-m)·n H_(2)O in the cycling was also *** a result,the as-obtained composite delivers excellent long-term cycle stability and enhanced rate performance for coin cells,which is also confirmed through density functional theory(DFT)*** assembled into flexible ZIBs,the sample still exhibits superior electrochemical performance,which may afford new design concept for flexible cathode materials of ZIBs.

关键词： Aqueous zinc ion batteries Vanadium trioxide Oxygen vacancy Structure evolution Phase optimization

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The preparation of SnS2@NxC electrodes and its exceptional performance in energy storage usages

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CHINESE JOURNAL OF CHEMICAL ENGINEERING 2024年第12期76卷 75-82页

作者： He, Zhen Wei, Yuqian song, yunfei Liu, Jiaming Wang, Yuxin Hayat, Muhammad D. Jiangsu Univ Sci & Technol Sch Mat Sci & Engn Zhenjiang Peoples R China Univ Waikato Sch Engn Hamilton 3216 New Zealand

Tin sulfide (SnS2) anodes have garnered significant attention within emerging energy storage technologies. However, the application of SnS2 is curtailed due to its inherent limitations, including poor cyclic stability and inevitable volumetric expansion upon cycling. This study reports the successful fabrication of an innovative SnS2-based composite, featuring an eggshell-like structured nitrogen-doped carbon coating, referred to as SnS2@NxC. This novel architecture, wherein SnS2 acts as the core encapsulated by a nitrogen-doped carbon shell, characterized by a void space between the shell and core, is crucial in mitigating volumetric expansion. This configuration contributes to maintaining the structural integrity of the composite materials, even under the stresses of continuous cycling. Nitrogen within the carbon matrix enhances conductivity and promotes the formation of a more robust and stable solid electrolyte interphase (SEI) layer. Experimental investigations have substantiated the electrochemical superiority of the SnS2@NxC electrode, demonstrating a specific capacity of 701.8 mA center dot h center dot g-1 after 1000 cycles at 0.5 A center dot g-1 and maintaining a capacity of 597.2 mA center dot h center dot g-1 after 400 cycles at a heightened current density of 2 A center dot g-1. These findings underscore the exceptional cyclic performance and durability of the SnS2@NxC electrode. (c) 2024 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Lithium-ion battery Cycling performance SnS2

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Polypyrrole-coated triple-layer yolk-shell Fe_(2)O_(3)anode materials with their superior overall performance in lithium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2024年第12期31卷 2737-2748页

作者： Zhen He Jiaming Liu Yuqian Wei yunfei song Wuxin Yang Aobo Yang Yuxin Wang Bo Li School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212000China Department of Chemical&Materials Engineering The University of AucklandAuckland 1010New Zealand

Iron oxide(Fe_(2)O_(3))emerges as a highly attractive anode candidate among rapidly expanding energy storage ***-less,its considerable volume changes during cycling as an electrode material result in a vast reduced battery cycle *** this work,an ap-proach is pioneered for preparing high-performance Fe_(2)O_(3)anode materials,by innovatively synthesizing a triple-layer yolk-shell Fe_(2)O_(3)uniformly coated with a conductive polypyrrole(Ppy)layer(Fe_(2)O_(3)@Ppy-TLY).The uniform polypyrrole coating introduces more reac-tion sites and adsorption sites,and maintains structure stability through charge-discharge *** the uses as lithium-ion battery elec-trodes,Fe_(2)O_(3)@Ppy-TLY demonstrates high reversible specific capacity(maintaining a discharge capacity of 1375.11 mAh·g^(−1)after 500 cycles at 1 C),exceptional cycling stability(retaining the steady charge-discharge performance at 544.33 mAh·g^(−1)after 6000 ultrafast charge-discharge cycles at a 10 C current density),and outstanding high current charge-discharge performance(retaining a reversible ca-pacity of 156.75 mAh·g^(−1)after 10000 cycles at 15 C),thereby exhibiting superior lithium storage *** work introduces in-novative advancements for Fe_(2)O_(3)anode design,aiming to enhance its performance in energy storage fields.

关键词： Fe_(2)O_(3) structure design anode material lithium-ion battery

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民国文献的编目问题探讨——基于民国时期文献联合目录平台

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图书馆学研究 2020年第24期 31-36页

作者：宋韵霏国家图书馆

民国时期文献由于历史原因损坏严重,抢救工作刻不容缓。民国时期文献联合目录平台的建立对加强民国文献的整理与揭示起到了重要作用。随着成员馆数据的大量上传,数据质量问题日益凸显,为联合目录的整理编制带来诸多不便。梳理民国时期... 详细信息

民国时期文献由于历史原因损坏严重,抢救工作刻不容缓。民国时期文献联合目录平台的建立对加强民国文献的整理与揭示起到了重要作用。随着成员馆数据的大量上传,数据质量问题日益凸显,为联合目录的整理编制带来诸多不便。梳理民国时期文献联合目录平台中数据整体存在的问题和常见的著录错误,解决问题的关键在于建立统一的数据制作规范。

关键词：民国文献书目数据文献编目

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腐殖酸对水泥土的腐蚀性初步试验研究

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安全与环境学报 2023年第9期23卷 3098-3106页

作者：曹净宋运飞高越昆明理工大学建筑工程学院昆明650500 深圳市勘察测绘院(集团)有限公司广东深圳518028

为了初步探究腐殖酸对水泥土的腐蚀性规律,试验采用向有机质含量较低的冲洪积黏性土中添加胡敏酸(Humic Acid,HA)和水泥的方法(掺入法)制成水泥土试样,并将其置于富里酸(Fulic Acid,FA)溶液和去离子水中浸泡(浸泡法)以模拟水泥土实际工... 详细信息

为了初步探究腐殖酸对水泥土的腐蚀性规律,试验采用向有机质含量较低的冲洪积黏性土中添加胡敏酸(Humic Acid,HA)和水泥的方法(掺入法)制成水泥土试样,并将其置于富里酸(Fulic Acid,FA)溶液和去离子水中浸泡(浸泡法)以模拟水泥土实际工作环境。当达到既定浸泡时间后,对水泥土进行表观现象观测试验、无侧限抗压强度试验和离子浸出试验,结果表明:1)HA掺入质量分数的增加会使水泥土强度(qu)逐渐降低,水泥土qu随浸泡时间的增长而增加。2)FA对水泥土初期qu具有增强作用,且水泥掺入质量分数越大,增强作用越明显。但随浸泡时间增长至180 d,试样qu逐渐降低,水泥土表面变得松散进而逐渐剥落。3)腐殖酸使水泥掺入质量分数较低的水泥土qu随浸泡时间的增长而降低,且HA与FA对试样的腐蚀表现出明显的协同作用,但随着水泥掺入质量分数的增加,其抗腐蚀性能有所提高。

关键词：安全工程技术科学水泥土腐殖酸胡敏酸富里酸无侧限抗压强度腐蚀

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Characteristics of Gray Skin Chewing Sugarcane and Its Precise Cultivation Techniques

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Agricultural Biotechnology 2018年第4期7卷 40-42,47页

作者： Zhiming YANG Lin ZENG Xiao ZHAO Shunsheng LU yunfei song Chaozhong ZHANG Wenwei TIAN Agricultural Integrated Service Center of Puqi Town Longyang DistrictBaoshan CityYunnan ProvinceBaoshan 678022China Agricultural Technology Extension Center of Longyang District Baoshan CityYunnan ProvinceBaoshan 67800China

[ Objectives] The aim was to provide technical supports for the popularization and application of gray skin chewing sugarcane in large areas in suitable regions. [ Methods] Field planting tests were conducted in 2012 -2016 to study the yield, major economic traits, disease resistances, growth periods, adaptability and cultivation techniques of gray skin chewing sugarcane. [ Results] The characteristics and a set of precise cultivation techniques for gray skin chewing sugarcane were summarized. [ Conclusions] The technology can be widely applied in the areas with altitude of less than 1 500 m and areas with similar climate in Yunnan Province.

关键词： Gray skin chewing sugarcane Characteristics Cultivation techniques Baoshan

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How to Increase Farmers' Income in the Poor Mountainous Areas ?

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Asian Agricultural Research 2015年第4期7卷 81-83页

作者： yunfei song Yan LIU Lin ZENG Shunsheng LU Guotian YANG Yan SHAN Guixian WU Lamei YANG Agricultural Technique Extension Station in Longyang District

Using the gray system theory and gray relational analysis method,the relationship between added value of hybrid corn,hogs,Juglans sigillata,Pisum Sativum L.,safflower and that of farmers' net income in Bailongjing Village,Wafang Township,Longyang District,Baoshan City,Yunnan Province was analyzed,and the ways to increase farmers' per capita net income were studied. The results showed that economic income of farmers by structure adjustment of agriculture is Juglans sigillata > Pisum Sativum L. > safflower > hogs > hybrid corn. The study can provide scientific basis for optimizing agricultural industrial structure in Baoshan City,and promoting the rapid growth of farmers' economic income.

关键词： Baoshan City Agriculture Industrial structure Gray

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猪笼草捕虫笼超滑表面黏附特性测量和抗黏稳定性分析

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东南大学学报（自然科学版） 2017年第2期47卷 259-264页

作者：王玉娟宋小闯陈云飞东南大学机械工程学院南京211189 江苏省微纳生物医疗器械设计与制造重点实验室南京211189

利用环境扫描电子显微镜(ESEM)表征红瓶猪笼草叶笼蜡质滑移区表面微观结构.利用手动悬臂移动法在原子力显微镜(AFM)无针尖探针悬臂上黏附15μm二氧化硅微球模拟单根刚毛与猪笼草蜡质区表面的接触,对新鲜蜡质区表面黏附力和摩擦力在干燥... 详细信息

利用环境扫描电子显微镜(ESEM)表征红瓶猪笼草叶笼蜡质滑移区表面微观结构.利用手动悬臂移动法在原子力显微镜(AFM)无针尖探针悬臂上黏附15μm二氧化硅微球模拟单根刚毛与猪笼草蜡质区表面的接触,对新鲜蜡质区表面黏附力和摩擦力在干燥空气环境和不同湿度条件的空气环境中做定量测试,并以光滑玻璃和热氯仿处理后的猪笼草表面作为参照.研究结果表明:猪笼草蜡质滑移区表面三维片状蜡质晶体是导致昆虫在植物表面打滑的主要原因,该结构能有效减小微球(或刚毛)与相应接触面的接触面积,从而降低微球(或刚毛)的黏附力和摩擦力.猪笼草蜡质滑移区表面三维片状蜡质晶体能有效排除接触区附近的水蒸气,保证了猪笼草蜡质滑移区在不同的湿度条件下均能保持高效抗黏稳定性.猪笼草蜡质滑移区表面的微构筑模式为微纳机电系统中抗黏附设计提供了绝佳的仿生学模板.

关键词：猪笼草蜡质区抗黏附稳定性

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Election Procedure for Rural Two Committees

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Asian Agricultural Research 2017年第5期9卷 48-51,55页

作者： Lin ZENG Wenbin SU Chaozhong ZHANG Shunsheng LU yunfei song Guotian YANG Mingshan LIAO Zhenzhao SAI Yan LIU Agricultural Technology Extension Station of Longyang District in Baoshan City Baoshan University

In order to further strengthen the construction and improvement of villager autonomy system with democratic election,democratic decision making,democratic management,and democratic supervision of rural two committees with Chinese characteristics,experience of work team of Longyang District Agricultural Technology Extension Station dispatched to villager committees( or offices) and their guidance on election of rural two committees in 2007-2016 were used,and exploration was made for election of rural two committees from the third to the sixth committees. It summarized achievements and main problems in election of rural two committees and came up with pertinent *** results of this study are expected to provide certain reference for theory and practice of future villager autonomy.

关键词： Rural two committees Election procedure Villager committee

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The Work of Instructors for New Socialist Countryside Construction

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Asian Agricultural Research 2016年第5期8卷 46-49,53页

作者： Lin ZENG Shunsheng LU Lamei YANG Chaozhong ZHANG yunfei song Yan LIU Zhengyin WU Jiajin TAO Guixian WU Longyang Agricultural Technique Extension Station Xiyi Agricultural Techinque Extension Station

To meet the wishes and demands of the majority of farmers,it is necessary to steadily build a new socialist countryside,and actively promote urban-rural integration. With the guidance for new countryside construction as an opportunity,this paper studies and explores the working practice of new countryside construction instructors sent by Longyang Agricultural Technique Extension Station for various village committees( or offices) during 2007- 2013. This paper analyzes and summarizes the results achieved and the main problems,and puts forth the corresponding recommendations. The results of the analysis can provide a reference for the instructors to carry out the guiding work for new countryside construction.

关键词： New countryside construction Instructors’ working practices Recommendations

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