检索结果-南通市图书馆

Interfacial/bulk synergetic effects accelerating charge transferring for advanced lithium-ion capacitors

Chinese Chemical Letters 2024年第6期35卷 168-175页

作者： Chang Liu Zirui song Xinglan Deng Shihong Xu Renji Zheng Wentao Deng Hongshuai Hou Guoqiang Zou Xiaobo Ji School of chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan 411104China College of chemistry and Chemical Engineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-Containing Mineral Resources School of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China

The exploration of advanced materials through rational structure/phase design is the key to develop highperformance lithium-ion capacitors(LICs).However,high complexity of material preparation and difficulty in quantity production largely hinder the further ***,Cu_(5)FeS_(4-x)/C(CFS@C)heterojunction with rich sulfur vacancies has successfully achieved from natural bornite,presenting low costeffective and bulk-production *** functional theory(DFT)calculations indicate that rich vacancies in bulk phase can decrease band gap of bornite and thus improve its intrinsic electron conductivity,as well as the heterojunction spontaneously evokes a built-in electric field between its interfacial region,largely reducing the migration barrier from 1.2. e V to 0.75 e *** from these merits,the CFS@C electrodes deliver outperformed lithium storage performance,e.g.,high reversible capacity(82..4m Ah/g at 0.1 A/g),excellent cyc{2.g stability(up to 82. cycles at 2.A/g and 540 cycles at 5 A/g with respective capacity retention of over or nearly 100%).With CFS@C as anode and porous carbon nanosheets(PCS)as cathode,the assembled CFS@C//PCS LIC full cells exhibit high {2./power density characteristics of 139.2.Wh/kg at 2.00 W/*** work is expected to offer significant insights into structure modifications/devising toward natural minerals for advanced {2.-storage systems.

关键词： Bulk/interfacial modification Heterostructure Sulfur vacancies Lithium ion capacitors Capacitors

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

Enhancing electromagnetic wave absorption with core‐shell structured SiO_(2.@MXene@MoS_(2.nanospheres

引用

Carbon energy 2024年第8期6卷 90-104页

作者： Xuewen Jiang Qian Wang Limeng song Hongxia Lu Hongliang Xu Gang Shao Hailong Wang Rui Zhang Changan Wang Bingbing Fan School of material Science and Engineering Zhengzhou UniversityZhengzhouHenanChina Henan Key Laboratory of Aeronautical materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhouHenanChina School of materials Science and Engineering Tsinghua UniversityBeijingChina

material composition and structural design are important factors influencing the electromagnetic wave(EMW)absorption performance of *** alleviate the impedance mismatch attributed to the high dielectric constant of Ti_(3)C_(2.T_(x)MXene,we have successfully synthesized core‐shell structured SiO_(2.@MXene@MoS_(2.*** architecture,comprising SiO_(2.as the core,MXene as the intermediate layer,and MoS_(2.as the outer shell,is achieved through an electrostatic self‐assembly method combined with a hydrothermal *** complex core‐shell structure not only provides a variety of loss mechanisms that effectively dissipate electromagnetic {2. but also prevents self‐aggregation of MXene and MoS_(2.***,the synergistic combination of SiO_(2.and MoS_(2.with highly conductive MXene enables the suitable dielectric constant of the composites,ensuring optimal impedance ***,the core‐shell structured SiO_(2.@MXene@MoS_(2.nanospheres exhibit excellent EMW absorption performance,featuring a remarkable minimum reflection loss(RL_(min))of−52.11 dB(2.4 mm).It is noteworthy that these nanospheres achieve an ultra‐wide effective absorption bandwidth(EAB)of 6.72.*** work provides a novel approach for designing and synthesizing high‐performance EMW absorbers characterized by“wide bandwidth and strong reflection loss.”

关键词： core‐shell structure electromagnetic wave absorption multiloss mechanism SiO_(2.@MXene@MoS_(2.

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

Highly efficient ternary organic solar cells with excellent open-circuit voltage and fill factor via precisely tuning molecular stacking and morphology

引用

Science China chemistry 2024年第3期67卷 963-972页

作者： Dinghong Sun Zhenyu Chen Jianfeng Zhang Wei song Jingyu Shi Jintao Zhu Yuanyuan Meng Fei Jin Shuncheng Yang Ziyi Ge Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211China Faculty of material Science and Chemical Engineering Ningbo UniversityNingbo 315211China Zhejiang Provincial Engineering Research Center of energy Optoelectronic materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Center of materials Science and Optoelectronics Engineering university of Chinese Academy of Sciences Beijing 100049China Department of Chemical and Environmental Engineering University of Nottingham NingboNingbo 315100China

The micro-morphology and molecular stacking play a key role in determining the charge transport process and nonradiative energy loss, thus impacting the performances of organic solar cells(OSCs). To address this issue, a non-fullerene acceptor PhC6-IC-F with alkylbenzene side-chain, possessing optimized molecular stacking, complementary absorption spectra and forming a cascade energy level alignment in the PM6:BTP-eC9 blend, is introduced as guest acceptor to improve efficiency of ternary OSCs. The bulky phenyl in the side-chain can regulate crystal{2.ity and optimizing phase separation between receptors in ternary blend films, resulting in the optimal phase separations in the ternary films. As a result, high efficiencies of 18.33% as photovoltaic layer are obtained for PhC6-IC-F-based ternary devices with excellent fill factor(FF) of 78.92.. Impressively, the ternary system produces a significantly improved open circuit voltage(V_(oc)) of 0.857 V compared with the binary device,contributing to the reduced density of trap states and suppressed non-radiative recombination result in lower energy loss. This work demonstrates an effective approach for adjusting the aggregation, molecular packing and fine phase separation morphology to increase V_(oc) and FF, paving the way toward high-efficiency OSCs.

关键词： alkylbenzene side-chain morphology regulation ternary blends organic solar cells

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

Chiral multiple-resonance thermally activated delayed fluorescence materials based on chiral spiro-axis skeleton for efficient circularly polarized electroluminescence

引用

Science China chemistry 2024年第7期67卷 2257-2264页

作者： Shi-Quan song Xiao Han Zhong-Zhong Huo Ching-Fai Yip Xian-Fang Hong Meng-Ning Ding You-Xuan Zheng State Key Laboratory of Coordination chemistry Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Key Laboratory of Mesoscopic chemistry of Ministry of Education School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Chiral luminescence materials have potential applications in the field of three-dimensional displays due to their circularly polarized luminescence(CPL)***,the further development of circularly polarized organic light-emitting diodes(CP-OLEDs)needs to meet the requirements of high efficiency,high color purity,low cost,and high dissymmetry factor(gPLor gEL),chiral multiple resonance thermally activated delayed fluorescence(MR-TADF)materials are considered as candidates in these ***,based on a pair of chiral spirofluorene precursors,two pairs of high-performance chiral MR-TADF emitters((R/S)-p-Spiro-DtBuCzB and(R/S)-m-Spiro-DtBuCzB)are developed,which exhibit strong emissions peaking at 491 and 502.nm in toluene with full-width at half-maximum values of 2. and 33 nm,*** addition,small singlet–triplet {2. gaps of 0.15 and 0.10 eV with high absolute photoluminescence efficiencies of 95.0%and 96.7%are observed for p-Spiro-DtBuCzB and m-Spiro-DtBuCzB molecules,*** based on p-Spiro-DtBuCzB and m-Spiro-DtBuCzB display high maximum external quantum efficiencies of 2..6%and 33.8%,*** importantly,CP-OLEDs present symmetric circularly polarized electroluminescence spectra with|gEL|factors of 3.36×10^(-4)and 7.66×10^(-4)for devices based on(R/S)-p-Spiro-DtBuCzB and(R/S)-m-Spiro-DtBuCzB enantiomers,respectively.

关键词： chiral spiro-axis skeleton-based material multiple resonance thermally activated delayed fluorescence circularly polarized electroluminescence dissymmetry factor external quantum efficiency

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

A CombustionModel for Explosive Charge Affected by a Bottom Gap in the Launch Environment

引用

Computer Modeling in Engineering & Sciences 2024年第2期138卷 1207-1236页

作者： ShiboWu Weidong Chen Jingxin Ma Lan Liu Shengzhuo Lu Honglin Meng Xiquan song College of Aerospace and Civil Engineering Harbin Engineering UniversityHarbin150001China General Department of Experimental Technology Beijing Institute of Structure and Environment EngineeringBeijing100076China Department of Economics Kunlun Energy Holding Company LimitedBeijing100101China

Launch safety of explosive charges has become an urgent problem to be solved by all countries in the world aslaunch situation of ammunition becomes ***, the existing numericalmodels have differentdefects. This paper formulates an efficient computational model of the combustion of an explosive charge affectedby a bottom gap in the launch environment in the context of the material point method. The current temperatureis computed accurately from the heat balance equation, and different physical states of the explosive charges areconsidered through various equations of state. Microcracks in the explosive charges are described with respectto the viscoelastic statistical crackmechanics (Visco–SCRAM) model. Themethod for calculating the temperatureat the bottomof the explosive charge with respect to the bottomgap is described. Based on this combustionmodel,the temperature history of a Composition B (COMB) explosive charge in the presence of a bottom gap is obtainedduring the launch process of a 155-mm artillery. The simulation results show that the bottom gap thickness shouldbe no greater than 0.039 cm to ensure the safety of the COM B explosive charge in the launch environment. Thisconclusion is consistent with previous results and verifies the correctness of the proposed model. Ultimately, thispaper derives amathematical expression for themaximumtemperature of the COMB explosive chargewith respectto the bottomgap thickness (over the range of 0.00–0.039 cm), and establishes a quantitative evaluationmethod forthe launch safety of explosive *** research results provide some guidance for the assessment and detectionof explosive charge safety in complex launch environments.

关键词： Combustion model explosive charge safety launch environment bottom gap temperature

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

基于光斑重叠的激光表面标刻等效脉冲传热模型与工艺分析

引用

中国表面工程 2024年第3期37卷 204-219页

作者：邓凯蔡颂陶能如熊显文陈达徐闻声余凡湖南第一师范学院智能制造学院长沙410205 湖南工业大学机械工程学院株洲412000 华中科技大学机械科学与工程学院武汉430074 武汉轻工大学机械工程学院武汉430023

目前激光表面标刻技术应用较为广泛,但标刻过程中涉及的能量耦合复杂。为满足激光标刻技术的发展需求,结合理论模型和试验分析对其能量耦合的原理进行探究。研究结果如下:重叠率在91%~99%时,激光扫描速率v或激光脉冲频率f影响下的材料... 详细信息

目前激光表面标刻技术应用较为广泛,但标刻过程中涉及的能量耦合复杂。为满足激光标刻技术的发展需求,结合理论模型和试验分析对其能量耦合的原理进行探究。研究结果如下:重叠率在91%~99%时,激光扫描速率v或激光脉冲频率f影响下的材料烧蚀深度会随重叠率的增加而增加,重叠率为99%时,材料去除率达最大;在光斑直径D影响下的烧蚀深度随重叠率的增加而减少,重叠率为91%时去除率最大。三种参数影响下,等效激光功率密度I1=3.88 W/μm^(2.时,将产生较大的反冲压力促进材料的去除,使激光标刻的能量利用率最大。面标刻中,线间距大于线段凹槽宽度时,导致线段叠加不能完全填充目标区域;线间距小于线段凹槽宽度时,会导致块体膨胀变形,表面质量被破坏;线间距与线段凹槽宽度接近时,目标区域可以被完全填充且表面质量不被破坏,标刻效果较好。通过分析空间上光斑重叠区域的能量耦合与时间上相邻脉冲的能量累积,整理得到等效脉冲传热数值模型,可对激光标刻的烧蚀深度进行更加简单有效的计算。

关键词：激光标刻高分子材料等效脉冲表面技术

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

Light-responsive Self-Immolative L-glutamic Acid-based Polyester Nanoparticles for Controlled Drug Release via Passerini Three-Component Polymerization

引用

Chinese Journal of Polymer Science 2024年第5期42卷 570-578,I0005页

作者： Xiao-Fei Sun Xu Zhang Shu-Ping song Ya-Qun Yao Yan Zhang Cheng-Liang Wang Jing-Jiang Sun Qing-Fu Wang Key Laboratory of Rubber-plastics Ministry of EducationSchool of Polymer Science and EngineeringQingdao University of Science and TechnologyQingdao266042China Qingdao Research Academy of Environmental Science Qingdao266012China

L-glutamic acid(LA)is a bio-based,non-toxic,environmentally friendly material derived from *** present study reports the application of Passerini three-component polymerization(P-3CP)for the straightforward preparation of LA-based light-responsive polyesters(PLTDs)under mild *** with molar masses up to 8500 g/mol and high yields exceeding 90%are *** chemical structures and light-responsive self-immolative behavior of PLTDs are comprehensively characterized by employing ultraviolet-visible(UV-Vis)spectroscopy,size exclusion chromatography(SEC),nuclear magnetic resonance(NMR)spectroscopy,and liquid chromatography mass spectrometry(LC-MS).Meanwhile,monodisperse PLTD-based doxorubicin-loaded nanoparticles(PLTD-DOX-NP)(size=193 nm,PDI=0.018)are formulated by nanoprecipitation *** light-induced depolymerization,the PLTD-DOX-NP undergoes rapid decomposition,resulting in a burst release of 80%cargo within 13 ***,according to biological toxicity tests,the PLTD-NP possesses adequate biosafety,both before and after ***,the incorporation of P-3CP with biore{2.able LA-based monomer adheres to the principles of green chemistry,significantly simplifying the synthetic pathway of light-responsive polymers.

关键词： L-glutamic acid Passerini three-component polymerization Light-responsive Polyester Nanoparticles

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

A review:(Bi,Na)TiO_(3)(BNT)-based energy storage ceramics

引用

Journal of Materiomics 2024年第1期10卷 86-123页

作者： Wen Zhu Zong-Yang Shen Wei Deng Kai Li Wenqin Luo Fusheng song Xiaojun Zeng Zhumei Wang Yueming Li Advanced Ceramic materials Research Institute China National Light Industry Key Laboratory of Functional Ceramic MaterialsEnergy Storage and Conversion Ceramic Materials Engineering Laboratory of Jiangxi ProvinceSchool of Materials Science and EngineeringJingdezhen Ceramic UniversityJingdezhen333403China

Facing the increasingly serious energy and environmental problems,the research and development of new energy storage technology and environment-friendly energy storage materials are *** a typical lead-free ferroelectric with excellent dielectric properties,(Bi,Na)TiO_(3)(BNT)is supposed to be the most potential and competitive environment-friendly ceramic material and has become a research hotspot for dielectric energy storage in recent *** paper first briefly introduces the basic physical principles and energy storage performance evaluation parameters of dielectric energy storage materials,then summarizes the critical research systems and related progress of BNT-based lead-free energy storage materials(bulk ceramics,films and multila{12.r ceramics)from the aspects of ions doping modification and multi-component composite optimization,and finally looks forward to the improvement direction and energy storage application prospect of BNT-based lead-free relaxor ferroelectric materials.

关键词： Dielectrics Relaxor ferroelectrics energy storage ceramics Sodium bismuth titanate Lead free

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

储氢材料与金属氢化物-镍电池

引用

物理 2004年第3期33卷 170-176页

作者：高学平卢志威张欢吴锋宋德瑛南开大学新能源材料化学研究所天津300071

储氢合金是金属氢化物 -镍电池的关键材料 .文中简要评述了稀土镍系合金、Laves相系合金、镁基合金、钒基固溶体和纳米管材料作为储氢电极材料的研究进展与目前存在问题 ,并简要介绍了动力金属氢化物 -镍电池的开发动态 .

关键词：储氢材料电化学金属氢化物-镍电池氢能镁基合金钒基固溶体纳米管材料

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

Enhanced Electrical Properties of Styrene-grafted Polypropylene Insulation for Bulk Power Transmission HVDC Cables

引用

CSEE Journal of Power and energy Systems 2024年第1期10卷 361-370页

作者： Hao Yuan Shixun Hu Yao Zhou Chao Yuan Wenbo song Qing Shao Hongwei Shi Juan Li Jun Hu Qi Li Jinliang He SINOPEC Beijing Research Institute of Chemical Industry Beijing 100013China State Key Laboratory of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China

Polypropylene(PP)is considered to be a rather promising material for HVDC cable *** modification has proved to be an effective method on the electrical property improvements of *** paper reports on the highlyenhanced electrical properties of styrene-grafted polypropylene(PP-g-St)and their related *** influence of grafting styrene on crystallization structures,thermal properties and electrical properties of PP-g-St are characterized and *** results show that PP-g-St exhibits remarkably enhanced DC volume resistivity,suppressed space charge accumulation and improved DC breakdown strengths as compared to *** observation shows PP-g-St has small,imperfect spherulites with indistinct boundaries,which is st{2.ly correlated to enhanced electrical *** study provides an effective grafting strategy to design high-performance HVDC cable insulation materials for bulk power transmission systems.

关键词： Electrical properties grafting modification polypropylene styrene

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：