检索结果-南通市图书馆

Cs-Induced Phase Transformation of Vanadium Oxide for High-Performance Zinc-Ion Batteries

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2023年第4期6卷 265-272页

作者： gan qu Kai Guo Weijie Chen Yu Du Ye Wang Bingbing Tian Jianan Zhang Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City College of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China

Rechargeable aqueous zinc-ion batteries are promising candidate for gridscale energy ***,the development of zinc-ion batteries has been plagued by the lack of cathode materials with high specific capacity and superior ***,hexagonal Cs_(0.3)V_(2)O_(5)cathode is fabricated and investigated in zinc-ion *** with the traditional vanadium oxides,the introduction of Cs changes the periodic atomic arrangements,which not only stabilizes the open framework structure but also facilitates the Zn^(2+)diffusion with a lower migration energy ***,high specific capacity of 543.8 mA h g^(-1)at 0.1 A g^(-1)is achieved,which surpasses most of reported cathode materials in zinc-ion *** excellent cycle life is achieved over 1000 cycles with about 87.8%capacity retention at 2 A g^(-1).Furthermore,the morphological evolution and energy storage mechanisms are also revealed via a series of *** work opens up a phase engineering strategy to fabricate the hexagonal vanadium oxide and elucidate the application of phase-dependent cathodes in zinc-ion batteries.

关键词： cathode materials phase engineering vanadium oxide zinc-ion batteries

Atomically Dispersed Fe-N_(4) Sites and Fe_(3)C Particles Catalyzing Polysulfides Conversion in Li-S Batteries

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2022年第5期38卷 1232-1238页

作者： CHEN Weijie XIA Huicong GUO Kai JIN Wangzhe DU Yu YAN Wenfu qu gan ZHANG Jianan College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001P.R.China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012P.R.China

Lithium-sulfur(Li-S)batteries have been puzzled by the“shuttle effect”.In the recent years,catalytic materials present a huge potential for solving this ***,the exploitation for catalytic activity was still challenging in Li-S *** this article,we put forward a single atom catalyst(SAC)of FeN_(4) coupled with Fe_(3)C on the N-doped carbon(FeN_(4)/Fe_(3)C@NC)by one-step pyrolysis *** FeN_(4) and Fe_(3)C synergistically catalyze the polysulfides conversion when the N-doped carbon provides the high conductive three-dimensional skeleton in Li-S *** a result,the FeN_(4)/Fe_(3)C@NC shows a specific capacity of 1100 mA·h/g at 0.2 C(1 C=1675 mA/g).In addition,the FeN_(4)/Fe_(3)C@NC maintains 99.01%of the pristine specific capacity after 100 cycles at 0.5 C,indicating the improved electrochemical performance in Li-S *** work sheds new lights on the design of engineering catalysts for developing high-performance Li-S batteries.

关键词： FeN_(4) Fe_(3)C Li-S battery Shuttle effect

Probing the active sites of 2D nanosheets with Fe-N-C carbon shell encapsulated Fe_(x)C/Fe species for boosting sodium-ion storage performances

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第8期15卷 7154-7162页

作者： Huicong Xia Pengfei Yuan Lingxing Zan gan qu Yunchuan Tu Kaixin Zhu Yifan Wei Zeyu WeiFangying Zheng Mo Zhang Yongfeng Hu Dehui Deng Jianan Zhang College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China State Key Laboratory of Catalysis iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Physics and Engineering Zhengzhou UniversityZhengzhou 450001China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China Key Laboratory of Chemical Reaction Engineering of Shaanxi Province College of Chemistry&Chemical EngineeringYan’an UniversityYan’an 716000China Canadian Light Source 44 Innovation Boulevard SaskatoonSaskatoon S7N 2V3Canada

Developing stable but high active metal-nitrogen-carbon(M-N-C)-based hard carbon anode is a promising way to be the alternatives to graphene and blank hard carbon for sodium-ion batteries(SIBs),requiring the precise tailoring of the electronic structure for optimizing the Na+intercalation behavior,yet is greatly ***,Fe-N-C graphitic layer-encapsulating Fe3C species within hard carbon nanosheets(Fe-N-C/Fe3C@HCNs)are rationally engineered by pyrolysis of self-assembled ***,the Fe-N-C/Fe3C@HCNs exhibit outstanding rate capacity(242 mAh·g^(−1)at 2,000 mA·g^(−1)),which is 2.1 and 4.2 times higher than that of Fe-N-C and N-doped carbon(N-C),respectively,and prolonged cycling stability(176 mAh·g^(−1)at 2,000 mA·g^(−1)after 2,000 cycles).Theoretical calculations unveil that the Fe3C species enhance the electronic transfer from Na to Fe-N-C,resulting in the charge redistribution between the interfaces of Fe3C and ***,the optimized adsorption behavior towards Na+reduces the thermodynamic energy *** synergistic effect of Fe3C and Fe-N-C species maintains the structural integrity of electrode materials during the sodiation/desodiation *** in-depth insight into the advanced Na+storage mechanisms of Fe3C@Fe-N-C offers precise guidance for the rational establishment of confinement heterostructures in SIBs.

关键词： Fe-N-C/Fe3C species encapsulated carbon nanosheets sodium-ion storage density functional theory

Phase engineering of Mo-V oxides molecular sieves for zinc-ion batteries

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Materials 2022年第4期65卷 939-946页

作者： gan qu Chuntian Qiu Jun Wang Jiewen Tan Shuangfeng Jia Zhesheng Chen Jean-Pascal Rueff Wesley Guangyuan Zheng Chenliang Su Bingbing Tian International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen518060China College of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China Department of Chemical and Biomolecular Engineering National University of Singapore10 Kent Ridge CrescentSingapore119260Singapore School of Physics and Technology Center for Electron MicroscopyMOE Key Laboratory of Artificial Micro-and Nano-structuresand Institute for Advanced StudiesWuhan UniversityWuhan430072China SociétéCivile Synchrotron SOLEIL L’Ormedes MerisiersSaint-AubinBP48Gif-sur-Yvette91192France Laboratoire de Chimie Physique-Matière et Rayonnement LCPMRSorbonne UniversitéCNRSParisF-75005France

With the ever-increasing demands of grid-scale energy storage,aqueous zinc-ion batteries(ZIBs)have garnered increasing attention around the ***,limited Zn^(2+)host materials have hindered the commercialization of ***,Mo-V oxides with different phase structures(orth-,tri-,and tetra-MoVO)were precisely constructed to develop phase-dependent Mo-V oxide cathodes for Zn^(2+)storage in *** open frameworks and varied tunnel structures formed a favorable alternative for achieving suitable Zn^(2+)diffusion *** optimized phase engineering,the high specific capacity of approximately 400 mA h g^(−1) and excellent cyclic stability of 1000 cycles were achieved with orth-MoVO as the *** large amount of six-and seven-member rings in the orth-MoVO phase,which allow for alternative Zn^(2+)insertion,play a vital role in hosting Zn^(2+)ions *** proposed phase engineering strategy provides a new approach toward cathode design in ZIBs.

关键词： zinc-ion batteries phase engineering molybdenum oxides vanadium oxides

Describing Hadsorption on dual-active sites of single-atom-metals and frustrated-Lewis-pairs for reverse water-gas shift reaction

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年

作者： Wenbin Li Jie gan Qing Guo Sai Zhang Yongquan qu School of Chemistry and Chemical Engineering Northwestern Polytechnical University School of Materials and Environmental Engineering Chizhou University Research & Development Institute of Northwestern Polytechnical University in Shenzhen

Acquiring descriptors to guide catalyst design is an ideal but challenging topic in the field of heterogeneous catalysis. Herein, the adsorption energy of H*(Ead（H）) has been established to describe the catalytic activity of dual-active sites of single-atom metals and frustrated Lewis pairs （FLPs） on the porous nanorod of CeO2surface （M1/PN-CeO2） for reverse water-gas shift （RWGS）reaction. H2and CO2molecules are adsorbed and activated on single-atom metals and FLP sites, respectively, facilitating the RWGS reaction through the H*spillover from single-atom metals to PN-CeO2supports. Mechanistic investigations illustrate that the generation of H*on the single-atom metals and subsequent migration towards FLP are critical steps, determining the performance of M1/PN–CeO2for RWGS reaction. A volcanic correlation is observed between Ead（H） and catalytic activity of M1/PN–CeO2for RWGS. The Pt1/PN–CeO2catalysts with a minimal deviation of-0.01 eV from the experimentally optimized Ead（H） of-1.88 eV, exhibited an exceptional turnover frequency of 33,605 h-1and surpassed a turnover number of 20,000,000for each Pt active site during a period of 650 h at 600°C. These findings could pave the way for the rational design of highly active and durable catalysts for RWGS reaction.

关键词：

高新技术企业知识型员工关键激励因素识别与策略体系构建——基于聚类与Nvivo质性分析的双重考量

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

科学管理研究 2018年第1期36卷 77-80页

作者：瞿淦苏州大学东吴商学院江苏苏州215006

基于以往理论研究成果,从薪酬激励、工作成就、员工成长、工作环境4个维度构建了知识型员工激励因素模型,并以江苏76家高新技术企业研发者为调查对象,采用聚类与Nvivo质性分析方法进行知识型员工关键激励因素识别,从价值、减压、心理契... 详细信息

基于以往理论研究成果,从薪酬激励、工作成就、员工成长、工作环境4个维度构建了知识型员工激励因素模型,并以江苏76家高新技术企业研发者为调查对象,采用聚类与Nvivo质性分析方法进行知识型员工关键激励因素识别,从价值、减压、心理契约3个维度提出员工帮助计划(EAP)。

关键词：高新技术企业知识型员工激励因素员工帮助计划(EAP)

在线全文

学校读者我要写书评

暂无评论

容器密封性智能检测方法及系统实现研究

电子测量与仪器学报 2018年第12期32卷 163-170页

作者：瞿国庆李干江苏商贸职业学院物联网技术研究所南通226011 南通智大信息技术有限公司南通226009

容器密封性是包装生产过程中质量检测的重要环节,传统的像素边缘检测都是进行粗定位,边缘不清晰且运行时间长,包装过程中的抖动现象会造成目标成像模糊。基于机器视觉、去抖动的亚像素边缘检测的原理,提出了一种容器密封性智能检测的方... 详细信息

容器密封性是包装生产过程中质量检测的重要环节,传统的像素边缘检测都是进行粗定位,边缘不清晰且运行时间长,包装过程中的抖动现象会造成目标成像模糊。基于机器视觉、去抖动的亚像素边缘检测的原理,提出了一种容器密封性智能检测的方法并进行系统实现。首先采用金字塔去抖动机理将图像复原;然后采用亚像素边缘检测方法结合了形态学算子法和三次样条插值处理,运用改进的CSS角点检测算法来检测容器的密封性;最后构建了系统实验平台并进行实验,验证了所提方法的可行性和有效性。实验结果表明,该方法比像素级方法检测效果更好,准确率在95%以上,可为连续生产线容器密封性实时检测系统的设计提供参考。

关键词：机器视觉图像处理亚像素模糊复原

碳基催化剂用于电催化氧还原生产H_(2)O_(2)的研究进展:策略、计算及实际应用

在线全文

学校读者我要写书评

暂无评论

高等学校化学学报 2023年第5期44卷 14-36页

作者：张小玉曲干薛冬萍闫文付张佳楠郑州大学材料科学与工程学院郑州450001 吉林大学化学学院无机合成与制备化学国家重点实验室长春130012

过氧化氢(H_(2)O_(2))作为一种多功能且环保的氧化剂,在工业生产、漂白、消毒和废水处理等领域都发挥着重要作用.传统的蒽醌工艺由于不环保、不安全且流程复杂,无法成为批量生产过氧化氢的最佳选择.基于电化学氧还原反应(ORR)的合成方... 详细信息

过氧化氢(H_(2)O_(2))作为一种多功能且环保的氧化剂,在工业生产、漂白、消毒和废水处理等领域都发挥着重要作用.传统的蒽醌工艺由于不环保、不安全且流程复杂,无法成为批量生产过氧化氢的最佳选择.基于电化学氧还原反应(ORR)的合成方法是一种有价值的替代蒽醌生产的方法.通常,H_(2)O_(2)可以通过2e^(-)ORR过程合成.碳基催化剂因储量丰富、成本低、结构可调和导电性好等优点,被认为是用于2e^(-)ORR的最佳催化剂之一.本文综合评述了近年来碳基催化剂在电化学合成H_(2)O_(2)方面的研究进展.首先,介绍了2e^(-)ORR过程的基本原理,揭示了影响ORR路径的关键因素;然后,阐述了密度泛函理论(DFT)计算对揭示催化活性位点的关键作用,并指明火山图是一种预测催化剂选择性的重要工具;综合评述了促进H_(2)O_(2)产生的几种有效策略(优化金属单原子、构建催化剂表面缺陷工程、引入吡咯氮、掺杂含氧官能团及掺杂其它杂原子);介绍了批量生产H_(2)O_(2)的装置发展及其优缺点;最后,展望了电化学合成H_(2)O_(2)在未来发展中可能面临的机遇和挑战.

关键词：过氧化氢二电子氧还原碳基催化剂火山图电解池

在线全文

学校读者我要写书评

暂无评论

浅谈苗族传统节日的功能──以湘西苗族为例

中南民族大学学报（人文社会科学版） 2006年第2期26卷 45-48页

作者：李乐为吴善茂屈甘霖吉首大学公共管理系湖南吉首416000

丰富多彩的苗族节日文化是苗族文化的集中表现形式,它对苗族社会的影响比较明显,其功能主要是:传承、强化积极向上的民族精神;“放飞”个体,营造和谐的社会生活环境;绵延历史,育人无形;有效保护民间艺术和工艺;促进商贸往来与文化交流。

关键词：苗族传统节日文化功能