检索结果-南通市图书馆

Better engineering layered vanadium oxides for aqueous zinc‐ion batteries: Going beyond widening the interlayer spacing

引用

SmartMat 2024年第1期5卷 83-109页

作者： Yue Guo hanmei jiang Binbin Liu Xingyang Wang Yifu Zhang jianguo Sun John Wang Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalianChina Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore

Aqueous zinc‐ion batteries(ZIBs)are regarded as among the most promising candidates for large‐scale grid energy storage,owing to their high safety,low costs,and environmental *** the past decade,vanadium oxides,which are exemplified by V2O5,have been widely developed as a class of cathode materials for ZIBs,where the relatively high theoretical capacity and structural stability are among the main ***,there are considerable challenges in the construction of vanadium‐based ZIBs with high capacity,long lifespan,and excellent rate *** widenings of the interlayer spacing in the layered vanadium oxides by pre‐intercalations appear to have reached their limitations in improving the energy density and other key performance parameters of ZIBs,although various metal ions(Na+,Ca2+,and Al3+)and even organic cations/groups have been ***,we discuss the advances made more recently,and also the challenges faced by the high‐performance vanadium oxides(V2O5‐based)cathodes,where there are several strategies to improve their electrochemical performance ranging from the new structural designs down to sub‐nano‐scopic/molecular/atomic levels,including cation pre‐intercalation,structural water optimization,and defect engineering,to macroscopic structural *** key principles for an optimal structural design of the V2O5‐based cathode materials for high energy density and fast‐charging aqueous ZIBs are examined,aiming at paving the way for developing energy storage designed for those large scales,high safety,and low‐cost systems.

关键词： aqueous zinc‐ion batteries cations pre‐intercalation defect engineering structural water vanadium oxides

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

Flexible quasi-solid-state zinc-ion hybrid supercapacitor based on carbon cloths displays ultrahigh areal capacitance

引用

Fundamental Research 2023年第2期3卷 288-297页

作者： Yifu Zhang Peng Wang Xueying Dong hanmei jiang Miao Cui Changgong Meng State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China

Over the past few years,the flexible quasi-solid-state zinc-ion hybrid supercapacitors(FQSS ZHSCs)have been found to be ideal for wearable electronics applications due to their high areal capacitance and energy *** assembly of desirable ZHSCs devices that have promising practical applications is of high importance,whereas it is still challenging to assemble ZHSCs *** this study,a ZHSC that exhibited ultrahigh areal capacitance and high stability was developed by using an active carbon cloth(ACC)cathode,which could improve ionic *** as-obtained ACC cathode had an energy storage mechanism due to the electrical double-layer capacitive behavior of Zn^(2+),which was accompanied by the dissolution/deposition of Zn_(4)SO_(4)(OH)6·*** ACC//Zn@ACC ZHSC device exhibited an areal capacitance of 2437 mF cm^(−2)(81 F cm^(−3),203 F g^(-1) under the mass of ACC with∼12 mg cm^(−2))at 1 mA cm^(−2),an areal energy density of 1.354 mWh cm^(−2) at 1 mW cm^(−2),as well as high stability(with an insignificant capacitance decline after 20000 cycles),which was demonstrated to outperform the existing ***,the assembled flexible device still had competitive capacitance,energy density and service life when integrated into a FQSS *** applied in practice,the device could achieve high mechanical flexibility,wearable stability and *** study can inspire the development of the FQSS ZHSC device to satisfy the demands for wearable energy storage devices with high performance.

关键词： Active carbon cloth Zinc-ion hybrid supercapacitor Areal capacitanceAreal energy density Flexibility Energy storage

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

早期胃癌内镜治疗抉择与补救手术

引用

中华消化外科杂志 2024年第3期23卷 345-353页

作者：燕速王学红马臻琦蒋汉梅高茜杨生森杨永成王庆于光青海大学附属医院胃肠肿瘤外科西宁810001 青海大学附属医院消化内科西宁810001 青海大学附属医院内镜中心西宁810001 于光内镜医生集团北京101100

我国早期胃癌检出率呈现逐年上升的趋势,基于循证医学证据的内镜治疗已成为早期胃癌的主要手段之一。根据内镜诊断、影像学诊断及病理学评估来选择适合内镜切除的早期胃癌,但是内镜切除存在手术风险和相应的并发症,包括胃穿孔、出血及... 详细信息

我国早期胃癌检出率呈现逐年上升的趋势,基于循证医学证据的内镜治疗已成为早期胃癌的主要手段之一。根据内镜诊断、影像学诊断及病理学评估来选择适合内镜切除的早期胃癌,但是内镜切除存在手术风险和相应的并发症,包括胃穿孔、出血及肿瘤残留等。因此,需要严格遵循早期胃癌内镜切除的手术适应证,掌握内镜切除技术,选择合理的内镜切除策略,并制定内镜切除后肿瘤残留补救手术方案,将提高早期胃癌治愈率及手术安全性。笔者查阅相关研究,系统阐述早期胃癌内镜治疗抉择与补救手术。

关键词：胃肿瘤早期内镜切除术策略补救手术

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

Synergistic effect of K^(+)and PANI in vanadium oxide hydration by interlayer engineering boosts the ammonium ion storage

引用

SusMat 2023年第2期3卷 263-275页

作者： Xingyu Chen Ziying Feng Xueying Dong hanmei jiang Changgong Meng Yifu Zhang State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalianChina Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore

Aqueous ammonium-ion(NH_(4)^(+))hybrid supercapacitor(AA-HSC),as a new type of energy storage device with great potential,is in the initial stage of rapid *** on its special energy storage mechanism,exploiting novel NH_(4)^(+)-hostingmaterials is still a great ***,vanadium oxide hydration(VOH)tuned by interlayer engineering of K+/PANI co-intercalation,named KVO/PANI,is designed for *** PANI can shield interaction between NH_(4)^(+)and V–O layers to some extent and enlarge interlayer space,which improves the efficiency of reversible NH_(4)^(+)(de)***,K+enhances redox activity and electronic *** synergistic effect of co-intercalation optimizes intercalation pseudocapacitive behavior during the(de)ammonization process,which is reported in NH_(4)^(+)storage for the first *** calculations reveal that the lowered electron transport barrier and enhanced electronic conductivity improveNH_(4)^(+)kinetics and exhibit high capacitance for charge *** KVO/PANI can deliver the specific capacitance of 340 F g^(−1) at 0.5 A g^(−1) and retain 177 F g^(−1) at 10 A g^(−1).Pairing with activated carbon,the AA-HSC can achieve a decent energy density of 31.8 Wh kg^(−1).This work gives inorganic/organic co-intercalation that can enhance the NH_(4)^(+)storage of VOH by interlayer *** strategy can be used to design other materials for aqueous energy storage systems.

关键词： ammonium-ion hybrid supercapacitor interlayer engineering K+/PANI co-intercalation

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

Quench-tailored Al-doped V_(2)O_(5) nanomaterials for efficient aqueous zinc-ion batteries

引用

Journal of Energy Chemistry 2022年第7期31卷 52-58,I0003页

作者： hanmei jiang Wenbin Gong Yifu Zhang Xin Liu Moaz Waqar Jingjing Sun Yanyan Liu Xueying Dong Changgong Meng Zhenghui Pan John Wang State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024LiaoningChina Department of Materials Science and Engineering National University of SingaporeSingapore 117574Singapore School of Physics and Energy Xuzhou University of TechnologyXuzhou 221018JiangsuChina School of Materials Science and Engineering Tongji UniversityShanghai 201804China

Rechargeable aqueous zinc-ion batteries(ZIBs)are regarded as a promising competition to lithium-ion batteries as energy storage devices,owing to their high safety and low ***,the development of high-performance ZIBs is largely hindered by the shortage of ideal cathode materials with high-rate capability and long-cycle ***,we address this bottleneck issue by the quenching-tailored surface chemistry of V_(2)O_(5) cathode *** rapid quenching from high temperatures,Al ions are doped into V_(2)O_(5) lattice(Al-V_(2)O_(5))and abundant oxygen vacancies are formed on the surface/nearsurface,which facilitate the desired rapid electron *** density functional theory(DFT)simulations elucidate that the doping of Al ions into V_(2)O_(5) remarkably reduces the Zn^(2+)-diffusion barriers and improves the electrical conductivity of V_(2)O_(5).As a proof-of-concept application,the thus-optimized AlV_(2)O_(5) cathode delivers a superior specific capacity of 532 m Ah g^(-1) at 0.1 A g^(-1) and a long-cycling life with76%capacity retention after 5000 cycles,as well as a good rate *** work provides not only a novel strategy for tuning the surface chemistry of V_(2)O_(5) to boost the Zn^(2+)storage but also a general pathway of modifying metal oxides with improved electrochemical performance.

关键词： Quenching-tailored V_(2)O_(5) Aqueous zinc-ion batteries Surface chemistry Long-cycle stability High-rate capability

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

Ultrathin Ti_(3)C_(2)T_(x)（MXene） Nanosheet-Wrapped NiSe_(2) Octahedral Crystal for Enhanced Supercapacitor Performance and Synergetic Electrocatalytic Water Splitting

引用

Nano-Micro Letters 2019年第2期11卷 179-192页

作者： hanmei jiang Zegao Wang Qian Yang Luxi Tan Lichun Dong Mingdong Dong Interdisciplinary Nanoscience Center(iNANO) Aarhus University8000 Aarhus-CDenmark School of Chemistry and Chemical Engineering Key Laboratory of Low-grade Energy Utilization Technologies and Systems of the Ministry of EducationChongqing UniversityChongqing 400044People’s Republic of China College of Materials Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871People’s Republic of China

Metal selenides,such as NiSe2,have exhibited great potentials as multifunctional materials for energy storage and ***,the utilization of pure NiSe2 as electrode materials is limited by its poor cycling stability,low electrical conductivity,and insufficient electrochemically active *** remedy these defects,herein,a novel NiSe2/Ti3C2Tx hybrid with strong interfacial interaction and electrical properties is fabricated,by wrapping NiSe2 octahedral crystal with ultrathin Ti3C2Tx MXene *** NiSe2/Ti3C2Tx hybrid exhibits excellent electrochemical performance,with a high specific capacitance of 531.2 Fg-1 at1 A g-1 for supercapacitor,low overpotential of 200 mV at 10 mA g-1,and small Tafel slope of 37.7 mV dec-1 for hydrogen evolution reaction(HER).Furthermore,greater cycling stabilities for NiSe2/Ti3C2Tx hybrid in both supercapacitor and HER have also been *** significant improvements compared with unmodified NiSe2 should be owing to thestrong interfacial interaction between NiSe2 octahedral crystal and Ti3C2Tx MXene,which provides enhanced conductivity,fast charge transfer as well as abundant active sites,and highlight the promising potentials in combinations of MXene with metal selenides for multifunctional applications such as energy storage and conversion.

关键词： MXene NiSe_(2) Supercapacitor Water splitting

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

PVA-assisted hydrated vanadium pentoxide/reduced graphene oxide films for excellent Li^(+)and Zn^(2+)storage properties

引用

Journal of Materials Science & Technology 2021年第24期83卷 7-17页

作者： Tao Hu Jingjing Sun Yifu Zhang Yanyan Liu hanmei jiang Xueying Dong Jiqi Zheng Changgong Meng Chi Huang State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian116024China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan430072China

Low-cost,high safety and environment-friendly aqueous energy storage systems(ESSs)are huge potential for grid-level energy storage,but the(de)intercalation of metal ions in the electrode materials(*** oxides)to obtain superior long-term cycling stability is a significant ***,we demonstrate that polyvinyl alcohol(PVA)-assisted hydrated vanadium pentoxide/reduced graphene oxide(V_(2)O_(5)·n H_(2)O/r GO/PVA,denoted as the VGP)films enable long cycle stability and high capacity for the Li^(+)and Zn^(2+)storages in both the VGP//Li Cl(aq)//VGP and the VGP//Zn SO4(aq)//Zn *** binderfree VGP films are synthesized by a one-step hydrothermal method combination with the *** extensive hydrogen bonds are formed among PVA,GO and H_(2)O,and they act as structural pillars and connect the adjacent layers as glue,which contributes to the ultrahigh specific capacitance and ultralong cyclic performance of Li^(+)and Zn^(2+)storage *** for Li^(+)storage,the binder-free VGP4 film(4mg PVA)electrode achieves the highest specific capacitance up to 1381 F g^(-1)at 1.0 A g^(-1)in the three-electrode system and 962 F g^(-1)at 1.0 A g^(-1)in the symmetric two-electrode *** also behaves the outstanding cyclic performance with the capacitance retention of 96.5%after 15000 cycles in the three-electrode system and 99.7%after 25000 cycles in the symmetric two-electrode *** for Zn^(2+)storage,the binder-free VGP4 film electrode exhibits the high specific capacity of 184 m A h g^(-1)at 0.5A g^(-1)in the VGP4//Zn SO4(aq)//Zn cell and the superb cycle performance of 98.5%after 25000 *** work not only provides a new strategy for the construction of vanadium oxides composites and demonstrates the potential application of PVA-assisted binder-free film with excellent electrochemical properties,but also extends to construct other potential electrode materials for metal ion storage cells.

关键词： V_(2)O_(5)·nH_(2)O/rGO/PVA film Li+storage Zn^(2+)storage High specific capacitance Outstanding cycle performance

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

基于HS-SPME-GC-MS和PCA分析知母及其制品的挥发性成分

引用

现代食品科技 2022年第8期38卷 266-272,296页

作者：刘天琪江汉美田宇刘金敏湖北中医药大学药学院湖北省药用植物研发中心湖北武汉430065

该文分析比较了知母及其制品的挥发性成分,为知母的食用和药用提供理论指导。使用顶空固相微萃取法(HS-SPME)与气质联用技术(GC-MS)相结合来分析鉴定生知母、盐知母和酒知母的挥发性成分,用面积归一化法计算各成分的相对百分含量,并进... 详细信息

该文分析比较了知母及其制品的挥发性成分,为知母的食用和药用提供理论指导。使用顶空固相微萃取法(HS-SPME)与气质联用技术(GC-MS)相结合来分析鉴定生知母、盐知母和酒知母的挥发性成分,用面积归一化法计算各成分的相对百分含量,并进行主成分分析(PCA)。由实验可知,三种知母共鉴定出70种挥发性成分,其中生知母28种,盐知母28种,酒知母29种,三者中相对含量最高的化合物均为苯乙醇,占比分别为12.19%、9.64%、20.36%,盐知母特有的柠檬烯、己酸和α-松油醇具有降脂、镇痛抗炎和抗惊厥等药理作用,3种知母共有挥发性成分为正己醛、苯甲醇、β-石竹烯,且在不同样品中含量明显不同。通过SPSS 21.0软件对挥发性成分及其含量进行PCA,结果表明盐知母挥发性成分的综合得分最高,生知母和酒知母得分较低。知母及其制品的挥发性成分组成和含量有明显区别,其中盐知母的得分最高。

关键词：生知母盐知母酒知母主成分分析顶空固相微萃取气质联用技术挥发性成分

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

Analysis of Low Melting Point Fat Constituents of Black Soybeans by HS-SPME-GC-MS

引用

Medicinal Plant 2017年第5期8卷 4-5,10页

作者： Han TU hanmei jiang Jinqing LU Hongyu ZHANG Xin YE Li CAO Research and Development Center of Medicinal Plant in Hubei Province/Hubei University of Chinese Medicine

[Objectives] To analyze the low melting point fat constituents in the black soybeans with green and yellow heart and their relative content,and compare the differences in the low melting point fat constituents between different kinds of black soybeans. [Methods] Using HS-SPME-GC-MS,the qualitative analysis was performed on the low melting point fat constituents of black soybeans; using peak area normalization method,the relative content of constituents was calculated. [Results]A total of 42 peaks were identified from the low melting point fat constituents of the black soybeans with yellow heart,and 18 kinds of chemical constituents were identified,accounting for 81.39% of total relative content of low melting point fat constituents; a total of 37 peaks were identified from the low melting point fat constituents of the black soybeans with green heart,and 15 kinds of chemical constituents were identified,accounting for 83.24% of total relative content of low melting point fat constituents. There were 9 kinds of common chemical constituents for the two kinds of black soybeans,and 5-allylguaiacol had the highest relative content,followed by hexanol. [Conclusions] There was no significant difference in the low melting point fat constituents between two kinds of black soybeans.

关键词： Black soybeans HS-SPME GC-MS Low melting point Fat

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

HS-SPME和GC-MS联用分析干姜、桂枝及其药对挥发性成分

引用

中药新药与临床药理 2022年第5期33卷 682-687页

作者：黄振阳江汉美刘金敏刘天琪何嘉伟湖北中医药大学湖北省药用植物研发中心湖北武汉430065

目的比较干姜、桂枝及其药对挥发性成分的相对百分含量,探讨干姜、桂枝药对配伍的意义。方法采用顶空固相微萃取法(HS-SPME)与气相色谱-质谱(GC-MS)联用法,分析干姜、桂枝及其药对的挥发性成分。通过单因素考察法确定最佳萃取条件,采用... 详细信息

目的比较干姜、桂枝及其药对挥发性成分的相对百分含量,探讨干姜、桂枝药对配伍的意义。方法采用顶空固相微萃取法(HS-SPME)与气相色谱-质谱(GC-MS)联用法,分析干姜、桂枝及其药对的挥发性成分。通过单因素考察法确定最佳萃取条件,采用面积归一化法计算各挥发性成分的相对百分含量,并进行主成分分析(PCA)。结果通过单因素考察法确定样品的最佳萃取条件为:进样量0.8 g,萃取温度60℃,萃取时间20 min,解析时间3 min。从干姜、桂枝及其药对中分别鉴定出43、35、38种挥发性成分,各占总挥发性成分含量的89.84%、80.69%和98.36%。干姜、桂枝及其药对共有的挥发性成分有9种,但共有成分的含量有所不同。三者的PCA综合得分具有明显的差异,药对的挥发性成分的PCA综合得分最高。结论干姜和桂枝配伍前后,单味药与药对的挥发性成分存在差异,且产生了新的挥发性成分。干姜、桂枝药对PCA综合得分最高,从挥发性成分变化推测,干姜和桂枝配伍后具有一定的协同增效的作用。

关键词：干姜桂枝药对顶空固相微萃取气相色谱-质谱联用挥发性成分配伍协同增效

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

在线全文

在线全文

在线全文

在线全文

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

在线全文

在线全文

在线全文

在线全文

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：