检索结果-南通市图书馆

A class of Ga-Al-P-based compounds with disordered lattice as advanced anode materials for li-ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第4期79卷 12-21页

作者： Yanhong li Peixun Xiong Lei Zhang Songliu Yuan wenwu li School of Physics Huazhong University of Science and TechnologyWuhan 430074HubeiChina School of Chemical Engineering Sungkyunkwan University2066Seobu-roJangan-guSuwon 440-746Republic of Korea School of Materials Science&Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

Phosphides possess large reversible capacity, small voltage hysteresis, and high energy efficiency, thus promising to be new anode candidates to replace commercial graphite for li-ion batteries(liBs).Through a facile mechanochemistry method, we prepare a novel ternary phosphide of Ga0.5Al0.5P whose crystalline structure is determined to be a cation-disordered cubic zinc sulfide structure according to XRD refinement. As an anode for liBs, the Ga0.5Al0.5P delivers a reversible capacity of 1,352 mA h g^(-1)at100 mA g^(-1)with an initial Coulombic efficiency(ICE) up to 90.0% based on a reversible li-storage mechanism integrating intercalation and subsequent conversion processes as confirmed by various characterizations techniques including in-situ XRD, ex-situ Raman, and XPS and electrochemical ***-modified Ga0.5Al0.5P exhibits a long-lasting cycling stability of retaining 1,182 mA h g^(-1)after300 cycles at 100 m A g^(-1), and 625 mA h g^(-1)after 800 cycles at 2,000 mA g^(-1), and a high-rate performance of remaining 342 m A h g^(-1)at 20,000 mA g^(-1). The outstanding electrochemical performances can be attributed to enhanced reaction kinetics enabled by the capacitive behaviors and the faster liion diffusion enabled by the cation-mixing. Importantly, by tuning the cationic ratio, we develop a novel series of cation-mixed compounds of Ga_(1/3)Al_(2/3)P, Ga_(1/4)Al_(3/4)P, Ga_(1/5)Al_(4/5)P, Ga_(2/3)Al_(1/3)P, Ga_(3/4)Al_(1/4)P, and Ga_(4/5)Al_(1/5)P, which demonstrate large capacity, high ICE, and suitable anode potentials. Broadly, these compounds with disordered lattices probably present novel physicochemical properties, and high electrochemical performances, thus providing a new perspective for new materials design.

关键词： Multinary phosphides Disordered lattice Anode li-ion batteries

Magnetism tuned by intercalation of various metal ions in coordination polymer

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2019年第7期30卷 1390-1392页

作者： Chengfei Wang Wei Zhang wenwu li Yuanyuan Zhang Xiaodong Tang Ming Hu State Key Laboratory of Precision Spectroscopy Key Laboratory of Polar Materials and Devices (MOE) School of Physics and Materials Science East China Normal University

Incorporation of guest ions into porous frameworks changed magnetism of the host materials significantly. However, in most cases, the guest ions were monovalent due to lack of reliable method to insert divalent and trivalent guest ions. In this work, we demonstrated that divalent and trivalent metal ions could be inserted into frameworks of a coordinate polymer, Cu3[Fe(CN)6]2, through electrochemical intercalation. The magnetism of the host frameworks was changed among paramagnetic, superparamagnetic, and ferromagnetic as demonstrated by physical property measurement system (PPMS). Furthermore, the magnetization of the frameworks under low temperatures correlated to the guest ions significantly. The ionic radius and net charge of the guest ions influenced the intercalation amount of the guest ions, therefore affected the valence change of Fe3+ ions in the host frameworks, finally leading to variation of the magnetism of the host materials.

关键词： Electrochemistry Magnetism Guest ions Prussian Blue analogues

Ultralong-life and high-rate web-like li4Ti5O12 anode for high-performance flexible lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Nano Research 2014年第7期7卷 1073-1082页

作者： Xianfu Wang Bin liu Xiaojuan Hou Qiufan Wang wenwu li Di Chen Guozhen Shen State Key Laboratory for Superlattices and Microstructures Institution of Semiconductors Chinese Academy of Science Beijing 100083 China Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 China

Flexible lithium ion batteries （liBs） have recently attracted increasing attention as they show unique promising advantages, such as flexibility, shape diversity, and light weight. Similar to conventional liBs, flexible liBs with long cycle life and high-rate performance are very important for applications of high performance flexible electronics. Herein, we report a three-dimensional （3D） web-like binderfree li4Ti5O12 （LTO） anode assembled from numerous 1D nanowires exhibiting excellent cycling performance with high capacities of 153 and 115 mA·h·g^-1 after 5,000 cycles at 2 C and 20 C, respectively, and excellent rate property with a capacity of 103 mA·h·g^-1 even at a very high current rate of 80 C. Surprisingly, a flexible full battery assembled from the web-like LTO nanostructure and liMn2O4 （LMO） nanorods exhibited a high capacity of 125 mA·h·g^-1 at high current rate of 20 C, and showed excellent flexibility with little performance degradation even in seriously bent states.

关键词： ultralong-life high-rate web-like li4Ti5O12 anode flexible batteries

A multi-kernel-shell indium selenide@carbon nanosphere enabling high-performance lithium-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

Journal of Energy Chemistry 2024年第9期96卷 698-708页

作者： Sihao Wang Zhuoming Jia Ying Zhao Yanhong li Xianglong Kong Yongde Yan Fei He Milin Zhang linzhi Wu Piaoping Yang wenwu li Meilin liu Zhiliang liu College of Material Sciences and Chemical Engineering Harbin Engineering UniversityHarbin 150001HeilongjiangChina School of Materials Science&Engineering Georgia Institute of TechnologyAtlantaGA 30332USA School of Chemical Engineering Sungkyunkwan University 2066Seobu-roJangan-guSuwon 440-746Republic of Korea College of Aerospace and Civil Engineering Harbin Engineering UniversityHarbin 150001HeilongjiangChina

Indium selenide has garnered significant attention for high volumetric capacities,but is currently plagued by the sluggish charge transfer kinetics,severe volume effect,and rapid capacity degradation that hinder their practical ***,we design,synthesize,and characterize a multi-kernel-shell structure comprised of indium selenide encapsulated within carbon nanospheres(referred to as m-K-S In_(2)Se_(3)@C)through an integrated approach involving a hydrothermal method followed by a gaseous selenization ***,experimental measurements and density functional theory calculations confirm that the m-K-S In_(2)Se_(3)@C not only improve the adsorption capability for li-ions but also lower the energy barrier for li-ions *** from numerous contact points,shorter diffusion distances and an improved volume buffering effect,the m-K-S In_(2)Se_(3)@C achieves an 800 mA h g^(−1)capacity over 1000 loops at 1000 mA g^(−1),a 520 mA h g^(−1)capacity at 5000 mA g^(−1)and an energy density of 270 Wh kg^(−1)when coupled with liFePO4,surpassing most related anodes reported ***,the m-K-S structure with unique nano-micro structure offers a new approach to the design of advanced anodes for liBs.

关键词： Multi-kernel-shell structure In_(2)Se_(3) Anode li-ion batteries

Single-Phase Ternary Compounds with a Disordered Lattice and liquid Metal Phase for High-Performance li-Ion Battery Anodes

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2023年第5期15卷 36-50页

作者： Yanhong li Lei Zhang Hung-Yu Yen Yucun Zhou Gun Jang Songliu Yuan Jeng-Han Wang Peixun Xiong Meilin liu Ho Seok Park wenwu li School of Chemical Engineering Sungkyunkwan University2066Seobu-roJangan-guSuwon-SiGyeonggi-Do 440-746Korea School of Physics Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA Department of Chemistry National Taiwan Normal UniversityTaipei 11677TaiwanPeople’s Republic of China Samsung Advanced Institute for Health Sciences and Technology(SAIHST) Sungkyunkwan University2066 SeoburoJangan-guSuwon 440-746Korea SKKU Advanced Institute of Nano Technology(SAINT) Sungkyunkwan University2066 SeoburoJangan-guSuwon 440-746Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan University2066 SeoburoJangan-guSuwon 440-746Korea

Si is considered as the promising anode materials for lithium-ion batteries(liBs)owing to their high capacities of 4200 mAh g-1and natural ***,severe electrode pulverization and poor electronic and li-ionic conductivities hinder their practical *** resolve the afore-mentioned problems,we first demonstrate a cation-mixed disordered lattice and unique li storage mechanism of single-phase ternary GaSiP_(2)compound,where the liquid metallic Ga and highly reactive P are incorporated into Si through a ball milling *** confirmed by experimental and theoretical analyses,the introduced Ga and P enables to achieve the stronger resistance against volume variation and metallic conductivity,respectively,while the cation-mixed lattice provides the faster li-ionic diffusion capability than those of the parent GaP and Si *** resulting GaSiP_(2)electrodes delivered the high specific capacity of 1615 mAh g-1and high initial Coulombic efficiency of 91%,while the graphite-modified GaSiP_(2)(GaSiP_(2)@C)achieved 83%of capacity retention after 900 cycles and high-rate capacity of 800 at 10,000 mA ***,the liNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)//Ga SiP_(2)@C full cells achieved the high specific capacity of 1049 mAh g-1after 100 cycles,paving a way for the rational design of high-performance liB anode materials.

关键词： Multinary compounds liquid metal GaSiP_(2) Disordered lattice li-ion batteries

Van der Waals ferroelectric transistors:the all-round artificial synapses for high-precision neuromorphic computing

在线全文

学校读者我要写书评

暂无评论

Chip 2023年第2期2卷 8-15页

作者： Zhongwang Wang Xuefan Zhou Xiaochi liu Aocheng Qiu Caifang Gao Yahua Yuan Yumei Jing Dou Zhang wenwu li Hang Luo Junhao Chu Jian Sun School of Physics and Electronics Central South UniversityChangsha 410083China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Institute of OptoelectronicsDepartment of Materials ScienceFudan UniversityShanghai 200433China National Key Laboratory of Integrated Circuit Chips and Systems Zhang Jiang Fudan International Innovation CenterFudan UniversityShanghai 200433China Raith China Beijing 100013China

State number,operation power,dynamic range and conductance weight update linearity are key synaptic device performance metrics for high-accuracy and low-power-consumption neuromorphic com-puting in ***,high linearity and low power consump-tion couldn’t be simultaneously achieved by most of the reported synaptic devices,which limits the performance of the *** work demonstrates van der Waals(vdW)stacked ferroelectric field-effect transistors(FeFET)with single-crystalline ferroelectric *** are of fine vdW interface and partial polar-ization switching of multi-domains under electric field pulses,which makes the FeFETs exhibit multi-state memory characteristics and ex-cellent synaptic *** also exhibit a desired linear conduc-tance weight update with 128 conductance states,a sufficiently high dynamic range of G_(max)/G_(min)>120,and a low power consumption of 10 fJ/spike using identical *** on such an all-round device,a two-layer artificial neural network was built to conduct Modified Na-tional Institute of Standards and Technology(MNIST)digital num-bers and electrocardiogram(ECG)pattern-recognition simulations,with the high accuracies reaching 97.6%and 92.4%,*** remarkable performance demonstrates that vdW-FeFET is of obvious advantages in high-precision neuromorphic computing applications.

关键词： Ferroelectric transistors Ferroelectric van der Waals het-erostructures Artificial synapses Neuromorphic computing

设防爆层钢箱梁缩尺结构抗近场爆炸作用试验研究

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

振动与冲击 2022年第1期41卷 46-51页

作者：李文武耿少波贺耀北湖南省交通规划勘察设计院有限公司长沙410008 中北大学土木工程学科部太原030051 湖南大学土木工程学院长沙410082

为研究设防爆层钢箱梁抗近场爆炸作用效果,以53 g炸药当量、70 mm爆距为典型爆炸条件,开展了混凝土-单层/双层钢丝网板、5层/10层凯夫拉板及其组合为防爆层的钢箱梁缩尺结构近场爆炸试验研究。以塑性变形能为抗爆效果考查指标,8种试验... 详细信息

为研究设防爆层钢箱梁抗近场爆炸作用效果,以53 g炸药当量、70 mm爆距为典型爆炸条件,开展了混凝土-单层/双层钢丝网板、5层/10层凯夫拉板及其组合为防爆层的钢箱梁缩尺结构近场爆炸试验研究。以塑性变形能为抗爆效果考查指标,8种试验工况结果表明:近场爆炸作用下无防护钢箱梁顶板会发生沿U型加劲肋的撕裂破坏及球冠状凹坑,且横隔板间距250 mm比间距150 mm的钢箱梁顶板破坏严重,变形能约高出60%;混凝土-双层钢丝网板较单层钢丝网板能降低钢箱梁顶板的变形能约2.2%;混凝土-双层钢丝网板与5层凯夫拉组合作为防爆层,顶板塑性变形能降低至无防护结构钢箱梁顶板的34.5%,混凝土-双层钢丝网板与10层凯夫拉组合作为防爆层,该数值约为32.7%。

关键词：钢箱梁近场爆炸防爆层凯夫拉

在线全文

学校读者我要写书评

暂无评论

西部地区人力资源产业配置结构分析

中国人力资源开发 2007年第9期24卷 73-76页

作者：李文武内蒙古财经学院

产业结构的变动引起人力资源就业结构的变动。西部地区产业结构与就业结构不够合理:第一产业劳动率偏低;第二产业在整个产业中的比重偏高,第三产业就业率偏低。西部地区应当采取有效措施平衡产业结构和就业结构的关系,促进当地经济健康... 详细信息

产业结构的变动引起人力资源就业结构的变动。西部地区产业结构与就业结构不够合理:第一产业劳动率偏低;第二产业在整个产业中的比重偏高,第三产业就业率偏低。西部地区应当采取有效措施平衡产业结构和就业结构的关系,促进当地经济健康发展。

关键词：西部地区人力资源产业结构

在线全文

学校读者我要写书评

暂无评论

《逸礼》篇目考辨

中国典籍与文化 2019年第4期 45-53页

作者：李文武湖南第一师范学院

《逸礼》为西汉所发现之古文礼经,后亡逸,其篇目成为历代礼家所探讨之重要课题。利用《汉书·艺文志》经传分明与古文经学等体例得出:《天子巡狩礼》《朝贡礼》《鲁郊礼》《禘于太庙礼》为《逸礼》篇目;《明堂阴阳》《军礼》非《逸礼》... 详细信息

《逸礼》为西汉所发现之古文礼经,后亡逸,其篇目成为历代礼家所探讨之重要课题。利用《汉书·艺文志》经传分明与古文经学等体例得出:《天子巡狩礼》《朝贡礼》《鲁郊礼》《禘于太庙礼》为《逸礼》篇目;《明堂阴阳》《军礼》非《逸礼》篇目;《五帝德》《帝系姓》《聘礼志》为《逸记》篇目;《学礼》《弟子职》《弟子籍》《孔子三朝记》阙疑。

关键词：逸礼篇目汉书艺文志古文经学