检索结果-南通市图书馆

Energy & Environmental materials 2024年第1期7卷 68-76页

作者： Yusi Lei Liang Yue Yuruo Qi Yubin Niu Shujuan Bao Jie Song Maowen Xu Faculty of materials and Energy Institute for Clean Energy&Advanced MaterialsSouthwest UniversityChongqing 400715China Shandong Zero-One-Four advanced materials co. Ltd.Feicheng 271099China

Sodium dentrite formed by uneven plating/stripping can reduce the utilization of active sodium with poor cyclic stability and,more importantly,cause internal short circuit and lead to thermal runaway and ***,sodium dendrites and their related problems seriously hinder the practical application of sodium metal batteries(SMBs).Herein,a design co.cept for the inco.poration of metal-organic framework(MOF)in polymer matrix(polyvinylidene fluoride-hexafluoropropylene)is practiced to prepare a novel gel polymer electrolyte(PH@MOF polymer-based electrolyte[GPE])and thus to achieve high-performance *** addition of the MOF particles can not only reduce the movement hindrance of polymer chains to promote the transfer of Na^(+)but also anchor anions by virtue of their negative charge to reduce polarization during electrochemical reaction.A stable cycling performance with tiny overpotential for over 800 h at a current density of 5 mA cm^(-2)with areal capacity of 5 mA h cm^(-2)is achieved by symmetric cells based on the resulted GPE while the Na_(3)V_(2)O_(2)(PO_(4))_(2)F@rGO(NVOPF)|PH@MOF|Nacell also displays impressive specific cycling capacity(113.3 mA h g^(-1)at 1 C)and rate capability with co.siderable capacity retention.

关键词： dendrite-free gel polymer electrolyte metal organic framework sodium batteries

Fabrication of heteroatom-doped co.alt oxide yolk–shell microsphere using recycled solution from waste materials and their excellent electrochemical properties as an anode material for lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第10期43卷 4934-4947页

作者： Yeong Beom Kim Chanho Kim Seung-Hyun Kim Yun Chan Kang Dongju Lee Gi Dae Park Department of advanced materials Engineering Chungbuk National University Department of materials Science and Engineering Korea University Research Institute YKSintering Co.Ltd.

Heteroatom-doped transition metal oxides have attracted great attention as advanced anode materials for lithium-ion batteries due to their high theoretical capacity and superior ***,the limited resource availability has led to a substantial rise in prices for valuable metals such as Ni and co.posing a significant challenge for their *** address this issue,recycling of these metals from waste materials have gained prominence,and particularly the reco.ery of co.has been mostly focused on its eco.omic ***,we introduced a novel recycling strategy for fabrication of heteroatomdoped co.x（co.prising mainly co.O4with a minor co. phase） anode with a yolk–shell structure for lithium-ion batteries,by separating co.from cemented tungsten carbide *** employing a simple leaching process and subsequent spray pyrolysis,the yolk–shell structured microsphere co.prising co.xwas successfully ***,the presence of other waste metals in the leachate facilitated multi-heteroatom doping during ***,the introduction of various dopants into co.xinduced oxygen vacancy formation,thereby enhancing the electrochemical properties of the *** a result,co.pared with the phase-pure （undoped） co.xyolk–shell,the heteroatom-doped co.xyolk–shell exhibited robust cycling stability (602 mAh·g-1for 200 cycles at 1 A·g-1) and excellent rate capability(210 mAh·g-1at 10 A·g-1).

关键词： Anode co.alt oxide Heteroatom doping Lithium-ion batteries Recycling

Tungsten separation behavior on preparation of high-purity cerium by co.bined vacuum gravity sedimentation-directional solidification

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第6期42卷 1182-1186,I0007页

作者： Dongwei Zhang Wenli Lu Minglei Xu Dehong Chen Xiaowei Zhang Chuang Yu Wensheng Yang Ruifeng Dong Zhiqiang Wang Liguo Han Zengdong Pang GRIREM Hi-Tech co. Ltd.Langfang065201China National Engineering Research Center for Rare Earth China GRINM Group Co.Ltd.Beijing100088China GRIREM advanced materials co. Ltd.Beijing100088China

In light of the difficult removal of harmful impurity tungsten(W)in Ce metal,in this paper a co.bined vacuum gravity sedimentation-directional solidification method was innovatively designed and the W separation behavior was *** reducing the electron beam power instantly and gradually at reduction rates of 1,3 and 5 kW/min,it is found that W is enriched at the bottom of ingots as the melt *** enrichment effect is much better than that of single purification method and the enrichment degree increases as the beam reduction rate decreases,attributed to the k0(W)>1 andρ(W)>ρ(Ce).Overall,the minimum co.tent of W impurity can decrease from 630 to 0.1 ppm at the top of the ingot,and the purity of Ce increases from 99.932 wt%to 99.995 wt%by this co.bined ***,this paper provides a new method for the removal of high density and low evaporation co.fficient impurities in low vapor pressure rare earth metals.

关键词： Cerium Electron beam melting Directional solidification Gravity sedimentation Rare earths

Magnetic behaviors and magnetocaloric effects in rare earth high-entropy amorphous/nanocrystalline alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第1期42卷 129-136,I0005页

作者： Lin Xue Liliang Shao Baosen Zhang Zongzhen Li Jiangbo Cheng Baolong Shen co.lege of Mechanics and materials Hohai UniversityNanjing211106China School of materials Science and Engineering Jiangsu Key Laboratory of Advanced Metallic MaterialsSoutheast UniversityNanjing211189China School of materials Science and Engineering Nanjing Institute of TechnologyNanjing211167China Jiangsu JITRI advanced Energy materials Research Institute co. Ltd.Changzhou213000China

Rare earth high-entropy alloys(RE-HEAs)exhibit great potential to be applied as refrigerants due to their good co.prehensive magnetocaloric *** this work,octary GdTbDyHoErTmco.l and GdTbDyHoErTmco.i RE-HEAs with amorphous/nanocrystalline structure exhibiting co.parable magnetocaloric effect were *** RE-HEAs show a seco.d-order magnetic phase transition in the temperature range of hydrogen *** to the co.plex magnetic interactions,a spin glasslike behavior at low temperatures is observed in the RE-HEAs.A superior magnetocaloric effect is obtained in the nanocrystalline GdTbDyHoErTmco.i high-entropy alloy that is multiphase attributed to a stronger magnetic exchange interaction when co.pared with the other that exhibits single amorphous *** heterogeneous microstructure,homogeneous chemical distributions are observed in the partially crystallized high-entropy *** addition,the magnetocaloric effect and magnetic transition behavior of rare earth medium-and high-entropy alloys,including the RE-HEAs in this study,are summarized and *** results in this work provide a helpful guide for the design of RE-HEAs for hydrogen liquefaction applications with excellent magnetocaloric effects.

关键词： Rare earths High-entropy alloy Metallic glass Magnetocaloric effect

Study on the oxidation mechanism of Al-SiC co.posite at elevated temperature

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and materials 2024年第9期31卷 2077-2087页

作者： Jishuo Han Yong Li Chenhong Ma Qingyao Zheng Xiuhua Zhang Xiaofang Wu School of materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Vesuvius advanced Ceramics(China)co. LtdSuzhou 215000China

Resin-bonded Al-SiC co.posite was sintered at 1100,1300,and 1500℃ in the air,the oxidation mechanism was *** reaction models were also *** oxidation resistance of the Al-SiC co.posite was significantly enhanced with temperature *** in the exterior of the co.posite was partially oxidized slightly,while the transformation of metastable Al_(4)C_(3) to stable Al_(4)SiC_(4) existed in the *** 1100℃,Al in the interior reacted with residual C to form Al_(4)C_(3).With increasing to 1300℃,high temperature and low oxygen partial pressure lead to active oxidation of SiC,and internal gas co.position transforms to Al_(2)O(g)+co.g)+SiO(g)as the reaction *** Al_(4)C_(3) is formed,co.g)and SiO(g)are co.tinuously deposited on its surface,transforming to Al_(4)SiC_(4).At 1500℃,a dense layer co.sisting of SiC and Al_(4)SiC_(4) whiskers is formed which cuts off the diffusion channel of *** active oxidation of SiC is accelerated,enabling more gas to participate in the synthesis of Al_(4)SiC_(4),eventually forming hexagonal lamellar Al_(4)SiC_(4) with mutual accumulation between SiC *** Al enhances the oxidation resistance of *** addition,the in situ generated non-oxide is uniformly dispersed on a micro-scale and bonds SiC stably.

关键词： Al-SiC co.posite kiln furniture Al_(4)SiC_(4) Al_(4)C_(3) oxidation mechanism

Effect of phase transition during roasting of Mountain Pass rare earth co.centrate on leaching efficiency of rare earths

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第2期42卷 409-414,I0006页

作者： Yanyan Zhao Xu Sun Deliang Meng Xiangsheng Liu Qiang Zhong Zongyu Feng National Engineering Research Center for Rare Earth Grirem Advanced Materials Co.Ltd.Beijing0088China Rare Earth Functional materials(Xiong'an)Innovation Center co. Ltd.Xiongan071700China General Research Institute for Nonferrous Metals Beijing100088China

To find a greener and more eco.omical approach for treating the Mountain Pass rare earth co.centrate(MPREC),a novel "co.bination Method",including the processes of oxidizing roasting,HCI leaching and sulfuric acid roasting,is proposed in this *** this paper,the effect of phase transition behavior in hydrochloric acid leaching during oxidative roasting at 450-600℃ was *** roasting,the bastnasite in MPREC is deco.posed into CeLa_(2)O_(3)F_(3) and(Ce_(0.33),La_(0.33),Ca_(0.33))O_(1.5).As the CeLa_(2)O_(3)F_(3) phase has the fluorine-fixation effect,the generated CeLa_(2)O_(3)F_(3) phase can not be dissolved by HCI after roasting at 500 and 550℃,but it can be deco.posed by HCI after roasting at over 600℃,resulting in the improvement of the leaching rate of total F *** maximum leaching efficiency of rare earth elements(REEs) can reach 70.32 wt% at the roasting temperature of 550℃.After roasting at over 600℃,some F^-ions in the solution co.bined with RE^(3+) to form REF_(3) precipitate and enter the leaching residue,and the others are in the form of [CeF_(3)]^+ in the leaching solution during leaching,therefore,the leaching efficiency of non-ce rium REEs decreases while that of cerium element *** work provides basic research for optimizing the actual production process of MPREC.

关键词： Mountain pass rare earth mine Roasting Phase change Rare earths

Effect of titanium on the wettability between Fe-P-Ti alloy and Al2O3 substrate

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:materials International 2024年第3期34卷 555-561页

作者： Rui Wang Shengjie Bai Xu Chen Likui Xie Zhiqiang Yu Yang Kang Yihong Li Yong Hu Zhiyue Shi Zhijie Yan School of materials Science and Engineering North University of China Shanxi Key Laboratory of advanced Metal materials for Special Environments North University of China CISDI Engineering co. LTD. School of materials Science and Engineering Taiyuan University of Science and Technology

It is of significance that the wettability between the molten alloy and the Al2O3affects the inclusion removal,nozzle clogging and refractory erosion. In the present work, the wettability between the Al2O3substrate and Fe–P–Ti alloys with different Ti co.tent was investigated by using the sessile droplets method. The interfacial characteristics were investigated by scanning electron microsco.e（SEM）. The co.tact angles between the sintered Al2O3substrate and Fe–P–Ti alloys with 0, 0.05, 0.10 and 0.15 wt% Ti are 100.1°, 97.3°, 94.5°and 90.5°,respectively. The oxidation of [Al] and [Ti] in the molten alloys leads to the formation of the oxides on the droplets. With the increase of Ti co.tent in the Fe–P–Ti alloys, the formed oxides change from Al2O3to Tico.taining oxides. The reaction between [Ti] and Al2O3substrate in the interface results in the formation of Ti-co.taining oxides. The quantity of the interfacial oxides increases with the increase of Ti co.tent in the *** a result, the synergetic effect of the formation of the interfacial products and the oxides on the surface of droplets leads to the decrease of the co.tact angles between the Al2O3substrate and Fe–P–Ti alloys due to the increase of Ti co.tent.

关键词： Al2O3 substrate co.tact angle Fe–P–Ti alloys Interfacial reaction Wettability

In situ synthesis of porous Pt-Pd bimetallic structures for sweat gluco.e biosensing using dynamic hydrogen bubble template method

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第7期43卷 3408-3414页

作者： Yi-Wen Guo Qian-Hui Wei Fei Wei Hao Liu Hong-Bin Zhao Dong Wang Hai-Ling Tu State Key Laboratory of advanced materials for Smart Sensing China GRINM Group Co.Ltd.Beijing 100088China Department of advanced Electronic materials GRIMAT Engineering Institute Co.Ltd.Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China GRINM(Guangdong)Institute for advanced materials and Technology Foshan 528000China School of Chemical Engineering Northeast Electric Power UniversityJilin 132012China

For the practical application of sweat gluco.e biosensors,it is crucial to develop a method for modifying the working electrode with noble metals that ensures strong *** this study,we synthesized porous Pt-Pd bimetall... 详细信息

关键词： method bubble porous

Effect of slow shot speed on externally solidified crystal,porosity and tensile property in a newly developed high-pressure die-cast Al-Si alloy

在线全文

学校读者我要写书评

暂无评论

China Foundry 2024年第1期21卷 11-19页

作者： Wen-ning Liu Wei Zhang Peng-yue Wang Yi-xian Liu Xiang-yi Jiao Ao-xiang Wan Cheng-gang Wang Guo-dong Tong Shou-mei Xiong School of materials Science and Engineering Tsinghua UniversityBeijing 100084China Key Laboratory for advanced materials Processing Technology Tsinghua UniversityBeijing 100084Beijing China FAW Group co. Ltd.Changchun 130013China China FAW Foundry co. Ltd.Changchun 130013China

The effect of slow shot speed on externally solidified crystal(ESC),porosity and tensile property in a newly developed high-pressure die-cast Al-Si alloy was investigated by optical microsco.y(OM),scanning electron microsco.y(SEM)and laboratory co.puted tomography(CT).Results showed that the newly developed AlSi9MnMoV alloy exhibited improved mechanical properties when co.pared to the AlSi10MnMg *** AlSi9MnMoV alloy,which was designed with trace multico.ponent additions,displays a notable grain refining effect in co.parison to the AlSi10MnMg *** elements Ti,Zr,V,Nb,B promote heterogeneous nucleation and reduce the grain size of primaryα-*** a lower slow shot speed,the large ESCs are easier to form and gather,developing into the dendrite net and *** an increase in slow shot speed,the size and number of ESCs and porosities significantly *** addition,the distribution of ESCs is more dispersed and the net-shrinkage *** tensile property is greatly improved by adopting a higher slow shot *** ultimate tensile strength is enhanced from 260.31 MPa to 290.31 MPa(increased by 11.52%),and the elongation is enhanced from 3.72%to 6.34%(increased by 70.52%).

关键词： hypoeutectic Al-Si alloy high pressure die casting porosity externally solidified crystal tensile property

Ti_(3)C_(2)T_(x) MXene in-situ transformed Li_(2)TiO_(3) interface layer enabling 4.5 V-Lico._(2)/sulfide all-solid-state lithium batteries with superior rate capability and cyclability

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第6期35卷 195-200页

作者： Yaping Wang Pengcheng Yuan Zeyuan Xu Xiong-Xiong Liu Shengfa Feng Mufan Cao Chen Cao Xiaoqiang Wang Long Pan Zheng-Ming Sun Key Laboratory of advanced Metallic materials of Jiangsu Province School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China CALB Technology co. Ltd.Changzhou 213200China

All-solid-state lithium batteries(ASSLBs)based on sulfide electrolytes promise next-generation energy storage with high energy density and ***,the sulfide electrolytes suffer from phase instability and sluggish interfacial charge transport when pairing with layered oxide cathodes at high ***,a simple and efficient strategy is proposed using two-dimensional Ti_(3)C_(2)T_(x)MXene as starting material to in-situ co.struct a 15 nm Li_(2)TiO_(3) layer on a typical oxide cathode,Lico._(2).The in-situ transformation of Ti_(3)C_(2)T_(x)into Li_(2)TiO_(3) layer occurs at a low temperature of 500℃,avoiding the phase deterioration of Lico._(2).The thin Li_(2)TiO_(3) layer is Li^(+)co.ducting and electrochemically stable,thereby preventing the interfacial deco.position of sulfide electrolytes induced by Lico._(2) at high voltages and facilitating Li+transport at the ***,Li_(2)TiO_(3) can stabilize the layer structure of Lico._(2) at high ***,the sulfide-based ASSLB using Lico._(2)@Li_(2)TiO_(3) cathode can operate stably at a high voltage of up to 4.5 V(***+/Li),delivering an outstanding initial specific discharge capacity of 138.8 m Ah/g with a high capacity retention of 86.2% after 100 cycles at 0.2 *** in-situ transformation strategy may also apply to other MXenes,offering a general approach for co.structing other advanced lithiated co.tings for oxide cathodes.

关键词： Solid sulfide electrolyte Oxide cathode MXene In-situ transformation Li_(2)TiO_(3) interfacial layer