检索结果-南通市图书馆

High-energy-density lithium manganese iron phosphate for lithium-ion batteries: Progresses, challenges, and prospects

引用

Journal of Energy Chemistry 2025年第1期100卷 1-17页

作者： Bokun Zhang Xiaoyun Wang Shuai Wang Yan Li Libo Chen Handong Jiao Zhijing Yu Jiguo Tu State Key laboratory of Advanced Metallurgy University of Science and Technology Beijing research Institute for Intelligent Wearable Systems The Hong Kong Polytechnic University Institute of Advanced structure Technology Beijing Institute of Technology

The soaring demand for smart portable electronics and electric vehicles is propelling the advancements in high-energy–density lithium-ion *** manganese iron phosphate (LiMnxFe1-xPO4) has garnered significant attention as a promising positive electrode material for lithium-ion batteries due to its advantages of low cost,high safety,long cycle life,high voltage,good high-temperature performance,and high energy *** LiMnxFe1-xPO4has made significant breakthroughs in the past few decades,there are still facing great challenges in poor electronic conductivity and Li-ion diffusion,manganese dissolution affecting battery cycling performance,as well as low tap *** review systematically summarizes the reaction mechanisms,various synthesis methods,and electrochemical properties of LiMnxFe1-xPO4to analyze reaction processes accurately and guide material ***,the main challenges currently faced are concluded,and the corresponding various modification strategies are discussed to enhance the reaction kinetics and electrochemical performance of LiMnxFe1-xPO4,including multi-scale particle regulation,heteroatom doping,surface coating,as well as microscopic morphology ***,in view of the current research challenges faced by intrinsic reaction processes,kinetics,and energy storage applications,the promising research directions are *** importantly,it is expected to provide key insights into the development of high-performance and stable LiMnxFe1-xPO4materials,to achieve practical energy storage requirements.

关键词： Lithium manganese iron phosphate High energy density Lithium-ion batteries Reaction mechanism Tap density

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Quantification of Total Glucosinolates and Isothiocyanates for Common Brassicaceous Vegetables Consumed in the US Market Using Cyclocondensation and Thiocyanate Ion Measurement methods

引用

Journal of Analysis and Testing 2019年第4期3卷 313-321页

作者： Jianghao Sun Pei Chen Agricultural research Service Beltsville Human Nutrition Research CenterMethods and Application of Food Composition LaboratoryUS Department of AgricultureBeltsvilleMD 20705USA

Glucosinolates are a group of important sulfur and nitrogen containing plant secondary metabolites found in Brassicaceous vegetables that are associated with many health *** is a growing interest in assessing dietary glucosinolates and their degradation products’isothiocyanates exposure to *** of glucosinolates in plants is a very challenging *** this study,the total glucosinolates from 22 commonly consumed Brassicaceous vegetables in the US market were determined by employing 1,2-benzenedithiol cyclocondensation for the determination of isothiocyanates(ITCs)from non-indole glucosinolates and a colorimetric method for the determination of thiocyanate ion(SCN^(−))from indole *** total glucosinolates were determined from the sum of these two *** the 22 investigated vegetables,the highest level of total ITCs was found in horse radish(5189.0±544.8 nmol/g dry weight)and the highest level of total SCN^(−)level was found in brussel sprouts(1294.0±141.6 nmol/g dry weight).The total glucosinolates ranged from 18.6±3.2 to 2271.2±215.3 nmol/g dry *** total glucosinolate and ITC data are necessary for the USDA glucosinolates database and important for establishing the relationship of glucosinolates to human nutrition.

关键词： Glucosinolate Isothiocyanate Thiocyanate ion Brassicaceous vegetables

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

Physical vapor transport growth and morphology of Bi2Se3 microcrystals

引用

Particuology 2016年第3期14卷 118-122页

作者： V.V. Atuchin S.V. Borisov T.A. Gavrilova K.A. Kokh N.V. Kuratieva N.V. Pervukhina laboratory of Optical materials and structures Institute of Semiconductor Physics SB RAS Novosibirsk 630090 Russia functional Electronics laboratory Tomsk State University Tomsk 634050 Russia laboratory of Semiconductor and Dielectric materials Novosibirsk State University Novosibirsk 630090 Russia laboratory of Crystul Chemistry Institute of Inorganic Chemistry SB RAS Novosibirsk 630090 Russia laboratory of Nanodiagnostics and Nanolithography Institute of Semiconductor Physics SB RAS Novosibirsk 630090 Russia laboratory of Crystal Growth Institute of Geology and Mineralogy SB RAS Novosibirsk 630090 Russia Geology and Mineralogy Department Novosibirsk State University Novosibirsk 630090 Russia Spintronics laboratory Saint Petersburg State University Saint Petersburg 198504 Russia laboratory of research methods of composition and structure of functional materials Novosibirsk State University Novosibirsk 630090 Russia

High-quality Bi2Se3 microcrystals were grown by the physical vapor transport （PVT） method without using a foreign transport agent. The microplate crystals grown under the optimal temperature gradient are well faceted and have dimensions up to -200 μm, The growth proceeds by the layer-by-layer mecha- nism with the formation of flat low-growth rate facets. The phase composition of the grown crystals was identified by the X-ray single crystal structure analysis in space group R3m, a = 4.1356（3）, C= 28.634（5）A, Z=3 （R=0.0147）. The most probable twin planes in the tetradymite structure were evaluated by the pseudo translational sublattice merhad.

关键词： Bi2Se3 Physical vapor transport structure Twin

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

Bio-inspired materials for Photocatalytic Hydrogen Production

引用

Chinese Journal of Structural Chemistry 2020年第12期39卷 2123-2130,2054页

作者： JIANG Xia CHEN Yan-Xin LU Can-Zhong CAS Key laboratory of Design and Assembly of functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Xiamen Key laboratory of Rare Earth Photoelectric functional materials Xiamen Institute of Rare-earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen 361021China

After millions of years of evolution,species in nature have structures and complex elements that are difficult to synthesize ***,these fine structures and compositions are often beneficial to improve the photocatalytic ***,various materials with special morphology,pore structure and element composition derived from biomass have emerged and are widely *** mini review focuses on the preparation of bio-inspired materials and their current status in photocatalytic hydrogen ***,this will bring new perspectives to researchers and make them learn more about the advantages of"learning from nature"and pay more attention to the green design of material structures.

关键词： biomass bio-inspired materials photocatalytic hydrogen production

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

Highly efficient luminescent Ⅰ-Ⅲ-Ⅵ semiconductor nanoprobes based on template-synthesized CuInS2 nanocrystals

引用

Nano research 2019年第8期12卷 1804-1809页

作者： Xian Li Datao Tu Shaohua Yu Xiaorong Song Wei Lian Jiaojiao Wei Xiaoying Shang Renfu Li Xueyuan Chen CAS Key laboratory of Design and Assembly of functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry and materials Science Fujian Normal UniversityFuzhou 350007China

CuInS2 semiconductor nanocrystals (NCs) exhibit large absorption coefficient, size-dependent photoluminescence and low toxicity, making them excellent candidates in a variety of bioapplications. However, precise control of both their composition and morphology to improve the luminescent efficiency remains a great challenge via conventional direct synthesis. Herein, we present a novel low-temperature template synthesis of highly efficient luminescent CuInS2 nanoprobes from In2S3 NCs via a facile cation exchange strategy. The proposed strategy enables synthesis of a series of CuInS2 NCs with broad size tunability from 2.2 to 29.6 nm. Through rationally manipulating the stoichiometry of Cu/In, highly efficient luminescence of CuInS2 with the maximum quantum yield of 28.6% has been achieved, which is about one order of magnitude improvement relative to that of directly synthesized NCs. By virtue of the intense emission of CuInS2 nanoprobes, we exemplify their application in sensitive homogeneous biodetection for an important biomolecule of adenosine triphosphate (ATP) with the limit of detection down to 49.3 nM. Moreover, the CuInS2 nanoprobes are explored for ATP-targeted cancer cell imaging, thus revealing their great potentials in the field of cancer diagnosis and prognosis.

关键词： CuInS2 semiconductor nanocrystals cation exchange luminescent nanoprobes biosensing

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

Optimal design of sintered Ce_9Nd_(21)Fe_(bal)B_1 magnets with a low-melting-point (Ce,Nd)-rich phase

引用

International Journal of Minerals,Metallurgy and materials 2015年第4期22卷 417-422页

作者： Shu-lin Huang Hai-bo Feng Ming-gang Zhu An-hua Li Yan-feng Li Ya-chao Sun Yue Zhang Wei Li functional materials research Institute Central Iron and Steel Research Institute School of materials Science and Engineering University of Science and Technology Beijing Beijing Key laboratory of Precision Alloys

A systemic investigation was done on the chemistry and crystal structure of boundary phases in sintered Ce9Nd21FebalB1 （wt%） magnets. Ce2Fe14B is believed to be more soluble in the rare-earth （RE）-rich liquid phase during the sintering process. Thus, the grain size and oxygen content were controlled via low-temperature sintering, resulting in high coercivity and maximum energy products. In addition, Ce formed massive agglomerations at the triple-point junctions, as confirmed by elemental mapping results. Transmission electron micros- copy （TEM） images indicated the presence of （Ce,Nd）Ox phases at grain boundaries. By controlling the composition and optimizing the preparation process, we successfully obtained Ce9Nd21FebalBx sintered magnets; the prepared magnets exhibited a residual induction, coerciv- ity, and energy product of 1.353 T, 759 kA/m, and 342 kJ/m3, respectively.

关键词： magnets liquid phases eutectic point enrichment optimal design

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

Electrochemical Performance of Li_4Ti_5O_(12) Prepared by Different methods

引用

Chinese Journal of Structural Chemistry 2009年第11期28卷 1393-1398页

作者：闫国峰李广社李莉萍方海升 Key laboratory of Optoelectronic materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterThe Chinese Academy of Sciences

A series of Li4Ti5O12 materials were prepared by three different methods： solvothermal, sol-gel, and solid-state reaction methods. Phase composition, morphology, and particle sizes of the samples were studied by powder X-ray diffraction （XRD） and scanning electron microscopy （SEM）. Electrochemical properties of the samples were investigated by charge-discharge tests. It is demonstrated that both sol-gel and solid-state reaction methods provided good control over the chemical composition and microstructure of the active material, in which sol-gel method yielded a fine Li4Ti5O12 spinel having an initial specific capacity of 146 mAh g-1 and low capacity fade during cycling. Comparatively, the solid-state method is simple and promising to prepare Li4Ti5O12 for commercial applications.

关键词： Li4Ti5O12 preparation anode material electrochemical 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

Nanocellulose/nitrogen and fluorine co-doped graphene composite hydrogels for high-performance supercapacitors

引用

Nano research 2023年第7期16卷 9519-9529页

作者： Yong Zhang Qingyun Zhou Wenhui Ma Chaohui Wang Xuefeng Wang Jiajun Chen Tiantian Yu Shan Fan College of materials Science and Engineering Graphene Functional Materials Research LaboratoryQiqihar UniversityQiqihar 161006China College of materials Science and Engineering Heilongjiang Province Key Laboratory of Polymeric Composition MaterialQiqihar UniversityQiqihar 161006China School of Chemistry and Chemical Engineering Qiqihar UniversityQiqihar 161006China Department of Practice Teaching and Equipment Management Qiqihar UniversityQiqihar 161006China

Three-dimensional graphene materials have been studied as typical supercapacitors electrode materials by virtue of their ultrahigh specific surface area and good ion transport ***,improvement of the poor volumetric electrochemical performance of these graphene materials has been required although they have high gravimetric energy *** this work,nanocellulose/nitrogen and fluorine co-doped graphene composite hydrogels(NC-NFGHs)were prepared through a convenient hydrothermal approach utilizing ammonium fluoride as the heteroatom ***(NC)and high concentration of graphene oxide(GO)were utilized to adjust the structure of NC-NFGHs and increase their packing ***,the aqueous symmetric supercapacitor based on NC-NFGH-80 exhibits remarkable gravimetric(286.6 F·g^(-1))and volumetric(421.3 F·cm^(-3))specific capacitance at 0.3 A·g^(-1),good rate performance,and remarkable cycle stability up to 10,000 ***,the all-solid-state flexible symmetric supercapacitors(ASSC)fabricated by NC-NFGH-80 also delivered a large specific capacitance of 117.1 F·g^(-1)at 0.3 A·g^(-1)and long service life over 10,000 cycles at 10 A·g^(-1).This compact porous structure and heteroatom co-doped graphene material supply a favorable strategy for high-performance supercapacitors.

关键词： compact graphene composite hydrogel high packing density N/F co-doping gravimetric/volumetric performances supercapacitors

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

Scalable and general synthesis of spinel manganese- based cathodes with hierarchical yolk-shell structure and superior lithium storage properties

引用

Nano research 2018年第1期11卷 246-253页

作者： Yu Wu Junting Zhang Chuanbao Cao research Center of materials Science Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and GreenApplications Beijing Institute of Technology Beijing 10008 I China

Hierarchical yolk-shell structured cathodes with controllable composition are potentially attractive materials for the fabrication of lithium-ion batteries, but they are difficult to synthesize. In this work, we present a simple, scalable, and general morphology-inheritance strategy to synthesize spinel manganese cathodes with a hierarchical yolk-shell structure. Starting from uniform Mn carbonate spheres prepared by an ultrafast and scalable microwave-assisted method, we show that the subsequent sintering results in the formation of Mn203 precursors with a yolk-shell structure, which can be effectively transferred to spinel manganese cathodes via simple impregnation and solid-state reaction. Owing to the simple and scalable nature of the present strategy, materials prepared through this approach have great potential as cathodes of lithium-ion batteries, where they can lead to high specific capacity, outstanding cyclability, and superior rate capability. In particular, both LiMn204 and LiNi05Mn1504 with hierarchical yolk-shell structure achieved nearly theoretical capacity, without any apparent decay after 100 cycles at I C. Moreover, 80% of the initial discharge capacities of both samples can be maintained for up to 500 cycles at a high rate of 10 C.

关键词： yolk-shell structures microwave-assistedmethod scalable synthesis spinel manganese cathodes lithium-ion batteries

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

Multiphase reaction spinning of high-temperature resistant weavable SiO_(2)-Kevlar hybrid aerogel fibers

引用

Nano research 2025年第1期18卷 424-433页

作者： Yunna Chen Wenlu Zhang Qingyang Li Wenbin Li Chong He School of Textile Science and Engineering Wuhan Textile UniversityWuhan 430200China State Key laboratory of New Textile materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China

Advanced aerogel fibers possess numerousadvantages amalgamating the attributes of aerogels and fibermaterials, rendering them invaluable in the realm of thermalmanagement and regulation. However, the achievement ofrobust mechanical properties and increased temperaturestability is still a major challenge for the majority of aerogelfibers. Herein, SiO_(2)-Kevlar hybrid aerogel fibers with bioniccore-shell structure were prepared by reaction spinning andweaved into fabric. Kevlar nanowires dispersion is pumpedinto a bath comprising a self-synthesized silica sol, whichfacilitates the hybridization of biphasic aerogels through thegel reaction. Precise control over the diameter (200-800 μm)and structure of the wet gel fibers was achieved throughmeticulous adjustment of the spinning solution composition and spinning parameters. Subsequent freeze-drying processfacilitates the formation of a core-shell hybrid structure, in which the SiO_(2) aerogel layer effectively encapsulate the Kevlaraerogel core fiber. Taking full advantage of the mechanical properties of the Kevlar core fiber, the resulting SiO_(2)-Kevlaraerogel fibers exhibit commendable weaving characteristics (51.8 MPa). Furthermore, SiO_(2)-Kevlar aerogel fabrics exhibitenhanced thermal insulation characteristics with a thermal conductivity of 0.037 W/(m·K). As a result of the presence ofexternal SiO_(2) aerogel layer, the overall temperature resistance performance of the SiO_(2)-Kevlar fabric reach up to 700 ℃.

关键词： aerogel fibers SiO_(2)aerogel Kevlar aerogel reaction spinning thermal protective performance

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

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：