检索结果-南通市图书馆

3D Hierarchical microspheres constructed by ultrathin MoS2-C nanosheets as high-performance anode material for sodium-ion batteries

引用

Journal of Energy Chemistry 2020年第10期29卷 307-315页

作者： Wenlong Zhang Haihui Zhou Zhongyuan Huang Songlin Li Chuqing Wang Huanxin Li Zhanheng Yan Teng Hou Yafei Kuang State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082HunanChina State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083HunanChina

MoS2/C composites are considered to have great application potential in sodium-ion batteries(SIBs).It is a challenging and meaningful subject that developing high-performance anode materials via combining MoS2 and carbon effectively to give free rein to their advantages in sodium ion storage.In this work,a novel MoS2-C material was designed by using cellulose nanocrystals(CNCs)as low-cost and green carbon source.3 D Hierarchical microspheres(200-250 nm)constructed by ultrathin MoS2-C nanosheets were synthesized by synchronizing the pre-carbonization of CNCs with the formation of MoS2 in hydrothermal reaction and subsequent pyrolysis process.It is found that the ultrathin MoS2-C nanosheets were composed of CNCs-derived short-range ordered carbon and few-layered MoS2.Benefiting from the unique structure and robust combination of MoS2 and CNCs-derived carbon,the ultrathin MoS2-C nanosheets composite was proved to have excellent cycling stability and superior rate performance in sodium-ion half-cell test and have high first reversible specific capacity of 397.9 m Ah/g in full-cell test.This work provides a significant and effective pathway to prepare MoS2-C materials with excellent electrochemical performance for the application in large-scale energy storage systems.

关键词： Cellulose nanocrystals MoS2-C nanosheets Hierarchical microspheres Anode material Sodium-ion batteries

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

One-pot solvothermal synthesis of hierarchical Co-doped NiO microspheres with enhanced hydrogen sulfide sensing performances

ChemPhysMater

引用

ChemPhysMater 2023年第4期2卷 337-345页

作者： Wenjing Du Jinbo Zhao Fenglong Wang Huan Yang Ling Chen Xingyu Yao Lili Wu Jiurong Liu College of Materials Engineering Henan Key Laboratory of Electronic Ceramics Materials and ApplicationHenan International Joint Laboratory of Rare Earth Composite MaterialsHenan University of EngineeringZhengzhou 451191China School of Materials Science and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250100China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of School of Materials Science and EngineeringShandong UniversityJinan 250061China Department of Chemical Engineering and Safety Binzhou UniversityBinzhou 256600China

In this study we report,for the first time,the synthesis of Co-doped NiO microspheres assembled by two-dimension nanosheets using a facile solvothermal method.The H 2 S gas-sensing performance of the as-prepared samples was systematically investigated.The result demonstrates that the Co–NiO sensor with Co/Ni molar ratio of 1%(1%Co–NiO)exhibits high response(12.9)and rapid response speed(110 s)to 20×10^(−6) H_(2)S at 200℃ in comparison with the pure NiO sensor.Moreover,excellent selectivity,repeatability,and stability were achieved.The sensing mechanism illustrates that the superior gas-sensing properties can be attributed to two factors.(1)The hierarchical microspherical construction with an ultrahigh specific surface area of 163.1 m^(2)g^(−1) provides adequate active sites for H_(2)S gas adsorption,porous structures,and an interlayer gap that accelerates the diffusion of H_(2)S gas,resulting in improved sensitivity and response speed of the sensor.(2)Co-doping results in a decrease in the particle sizes(ca.4 nm)and increase in the number of adsorbed ionized oxygen species,which improves sensitivity and selectivity.Therefore,this study provides a facile approach for the synthesis of hierarchical Co–NiO microspheres with enhanced H_(2)S gas-sensing performance.

关键词： Co-doped NiO Gas sensor Hierarchical microspheres Hydrogen sulfide

来源：

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

Boosting Interfacial Polarization Through Heterointerface Engineering in MXene/Graphene Intercalated-Based microspheres for Electromagnetic Wave Absorption

引用

Nano-Micro Letters 2023年第9期15卷 436-460页

作者： Ge Wang Changfeng Li Diana Estevez Peng Xu Mengyue Peng Huijie Wei Faxiang Qin Institute for Composites Science Innovation(InCSI) School of Materials Science and EngineeringZhejiang University38 Zheda RoadHangzhou 310027People’s Republic of China Ningbo Institute of Technology Zhejiang University1 Qianhu South RdNingbo 315100People’s Republic of China Foshan(Southern China)Institute for New Materials FoshanPeople’s Republic of China

Multi-layer 2D material assemblies provide a great number of interfaces beneficial for electromagnetic wave absorption.However,avoiding agglomeration and achieving layer-by-layer ordered intercalation remain chal-lenging.Here,3D reduced graphene oxide(rGO)/MXene/TiO_(2)/Fe_(2)C lightweight porous microspheres with periodical intercalated structures and pronounced inter-facial effects were constructed by spray-freeze-drying and microwave irradiation based on the Maxwell–Wagner effect.Such approach reinforced interfacial effects via defects introduction,porous skeleton,multi-layer assembly and multi-compo-nent system,leading to synergistic loss mechanisms.The abundant 2D/2D/0D/0D intercalated heterojunctions in the microspheres provide a high density of polari-zation charges while generating abundant polarization sites,resulting in boosted interfacial polarization,which is verified by CST Microwave Studio simulations.By precisely tuning the 2D nanosheets intercalation in the heterostructures,both the polarization loss and impedance matching improve significantly.At a low filler loading of 5 wt%,the polarization loss rate exceeds 70%,and a minimum reflection loss(RLmin)of-67.4 dB can be achieved.Moreover,radar cross-section simulations further confirm the attenuation ability of the optimized porous microspheres.These results not only provide novel insights into understanding and enhancing interfacial effects,but also constitute an attractive platform for implementing heterointerface engineering based on customized 2D hierarchical architectures.

关键词： MXene Hierarchical microspheres Interfacial polarization Spray-freeze-drying Microwave absorption

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：