检索结果-内蒙古大学图书馆

Tuning the solubility of polysulfides for constructing practical lithium-sulfur battery

Journal of Energy Chemistry 2024年第8期95卷 611-617,I0013页

作者： Jiapeng Li Jianlong Cong Haijin Ji Ting Shi Lixia Yuan Yunhui Huang State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

Li-S batteries are regarded as one of the most promising candidates for next-generation battery systems with high energy density and low ***,the dissolution-precipitation reaction mechanism of the sulfur(S)cathode enhances the kinetics of the redox processes of the insulating sulfu r,which also arouses the notorious shuttle effect,leading to serious loss of S species and corrosion of Li *** get a balance between the shuttle restraining and the kinetic property,a combined strategy of electrolyte regulation and cathode modification is proposed via introducing 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoroprpyl ether(HFE)instead of 1,2-dimethoxyethane(DME),and SeS_(7)instead of S_*** introduction of HFE tunes the solvation structure of the LiTFSI and the dissolution of intermediate polysulfides with Se doping(LiPSSes),and optimize the interface stability of the Li anode *** minor Se substitution compensates the decrease in kinetic due to the decreased solubility of *** this way,the Li-SeS_(7)batteries deliver a reversible capacity of 1062 and 1037 mAh g^(-1)with 2.0 and 5.5 mg SeS_(7)cm^(-2)loading condition,***,an electrolyte-electrode loading model is established to explain the relationship between the optimal electrolyte and cathode *** makes more sense to guide the electrolyte design for practical Li-S batteries.

关键词： Li-S batteries Lithium polysulfides Solubility Shuttle effect Interface Se doping

来源：评论

学校读者我要写书评

暂无评论

Uncovering the solid-phase conversion mechanism via a new range of organosulfur polymer composite cathodes for lithium-sulfur batteries

引用

Journal of Energy Chemistry 2023年第9期84卷 459-466页

作者： Xiang Li Dezhong Liu Ziyi Cao Yaqi Liao Zexiao Cheng Jie Chen Kai Yuan Xing Lin Zhen Li Yunhui Huang Lixia Yuan State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

The sulfur cathodes operating via solid phase conversion of sulfur have natural advantages in suppressing polysulfide dissolution and lowering the electrolyte dosage,and thus realizing significant improvements in both cycle life and energy *** realize an ideal solid-phase conversion of sulfur,a deep understanding of the regulation path of reaction mechanism and a corresponding intentional material and/or cathode design are highly ***,via covalently fixing of sulfur onto the triallyl isocyanurate,a series of S-triallyl isocyanurate organosulfur polymer composites(STIs) are *** between the structure and the electrochemical conversion behavior of STIs is systematically *** is found that the structure of STIs varies with the synthetic temperature,and correspondingly the electrochemical redox of sulfur can be controlled from conventional "solid-liquid-solid" conversion to the "solid-solid" *** the STI series,the STI-5 composite realizes an ideal solid-phase conversion and demonstrates great potential for building a Li-S battery with high-energy density and long-cyclelife:it realizes stable cycling over 1000 cycles in carbonate electrolyte,with a degradation rate of0.053% per cycle;the corresponding pouch cell shows almost no capacity decay for 125 cycles under the conditions of high sulfur loading(4.5 mg cm^(-2)) and lean electrolyte(8 μL mg_s^(-1)).In addition,the tailoring strategy of STI can also apply to other precursors with allyl functional groups to develop new organosulfur polymers for "solid-solid" sulfur *** vulcanized triallyl phosphate(STP) and triallylamine(STA) both show great lithium storage *** strategy successfully develops a new family of organosulfur polymers as cathodes for Li-S batteries via solid-phase conversion of sulfur,and brings insights to the mechanism study in Li-S batteries.

关键词： Organosulfur polymer Lithium–sulfur batteries Allyl functional groups Reaction mechanism Solid–solid conversion

来源：评论

学校读者我要写书评

暂无评论

Metallized polymer current collector as“stress acceptor”for stable micron-sized silicon anodes

引用

Journal of Energy Chemistry 2025年第2期101卷 786-794,I0017页

作者： Ziyi Cao Haoteng Sun Yi Zhang Lixia Yuan Yaqi Liao Haijin Ji Shuaipeng Hao Zhen Li Long Qie Yunhui Huang State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina Department of Chemistry Brown UniversityProvidence RI 02912United States

Micron-sized silicon(μSi)is a promising anode material for next-generation lithium-ion batteries due to its high specific capacity,low cost,and abundant ***,the volume expansion that occurs during cycling leads to the accumulation of undesirable stresses,resulting in pulverization of silicon microparticles and shortened lifespan of the ***,a composite film of Cu-PET-Cu is proposed as the current collector(CC)forμSi anodes to replace the conventional Cu ***-PET-Cu CC is prepared by depositing Cu on both sides of a polyethylene terephthalate(PET)*** PET layer promises good ductility of the film,permitting the Cu-PET-Cu CC to accommodate the volumetric changes of silicon microparticles and facilitates the stress release through ductile *** a result,theμSi electrode with Cu-PET-Cu CC retains a high specific capacity of 2181 mA h g^(-1),whereas theμSi electrode with Cu CC(μSi/Cu)exhibits a specific capacity of 1285 mA h g^(-1)after 80 *** stress relieving effect of CuPET-Cu was demonstrated by in-situ fiber optic stress monitoring and multi-physics *** work proposes an effective stress relief strategy at the electrode level for the practical implementation ofμSi anodes.

关键词： Micron-sized Si anodes Metallized polymer current collector Stress relieving Electrode design

来源：评论

学校读者我要写书评

暂无评论

Achieving high strength in laser powder-bed fusion processed AlFeCuZr alloy via dual-nanoprecipitations and grain boundary segregation

引用

Journal of materials Science & technology 2023年第6期137卷 56-66页

作者： Jing-Yu Xu Cheng Zhang Li-Xue Liu Rong Guo Ming-Jun Sun Lin Liu School of Materials Science and Engineering State Key Lab for Materials Processing and Die&Mold TechnologyHuazhong University of Science and TechnologyWuhan 430074China

Additive manufacturing of aluminum alloys has received significant attention in the aerospace industry;however,achieving sufficient high strength,especially at elevated temperatures,remains ***,a crack-free and near-full dense Al-1Fe-0.6Cu-1.3Zr alloy was fabricated by the laser powder bed fusion(LPBF)*** Al-Fe-Cu-Zr alloy exhibits heterogeneous microstructures with two distinct *** is the so-called coarse-grain zones(CGZs)with an average grain size of 0.95μm,where(Al,Cu)Fe_(3) nanoparticles precipitate in the Al matrix and Fe and Cu cosegregate at the grain boundaries(GBs).The other is fine-grain zones(FGZs)with an average grain size of 0.45μm,where an Al 3 Zr nanoparti-cle precipitates in each of theα-Al grains(serves as the nuclei),and Fe-rich nanoprecipitates and Fe/Cu cosegregation appear at the *** a result,the LPBF Al-Fe-Cu-Zr alloy,with these unique heteroge-neous structures,displays high strength at both room temperature and elevated temperatures,e.g.,with high yield strengths of 500 MPa at room temperature,and 163 MPa at 573 K,both are higher than those of additive manufactured Al-based alloys reported thus *** is suggested that the high strength over a wide temperature range of the current LPBF Al alloy is mainly attributed to the combination of the precipitation strengthening mechanism and grain-boundary strengthening mechanism.

关键词： Laser powder bed fusion Aluminum alloy Heterogeneous microstructure Nanoprecipitation High strength

来源：评论

学校读者我要写书评

暂无评论

Low-Volatile Binder Enables Thermal Shock-Resistant Thin-Film Cathodes for Thermal Batteries

引用

Energy & Environmental materials 2024年第4期7卷 126-134页

作者： Yong Xie Yong Cao Xu Zhang Liangping Dong Xiaojiang Liu Yixiu Cui Chao Wang Yanhua Cui Xuyong Feng Hongfa Xiang Long Qie Laboratory of Electrochemical Power Sources Institute of Electronic EngineeringChina Academy of Engineering PhysicsMianyang 621000China School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Manufacturing thin-film components is crucial for achieving high-efficiency and high-power thermal batteries(TBs).However,developing binders with low-gas production at the operating temperature range of TBs(400-550°C)has proven to be a significant ***,we report the use of acrylic acid derivative terpolymer(LA136D)as a low-volatile binder for thin-film cathode fabrication and studied the chain scission and chemical bondbreaking mechanisms in *** is shown LA136D defers to randomchain scission and cross-linking chain scission mechanisms,which gifts it with a low proportion of volatile products(ψ,ψ=39.2 wt%)at even up to 550°C,well below those of the conventional PVDF(77.6 wt%)and SBR(99.2 wt%)***,LA136D contributes to constructing a thermal shock-resistant cathode due to the step-by-step bond-breaking *** is beneficial for the overall performance of *** discharging test,the thin-film cathodes exhibited a remarkable 440%reduction in polarization and 300%enhancement in the utilization efficiency of cathode materials,while with just a slight increase of 0.05 MPa in gas pressure compared with traditional“thick-film”*** work highlights the potential of LA136D as a low-volatile binder for thin-film cathodes and shows the feasibility of manufacturing high-efficiency and high-power TBs through polymer molecule engineering.

关键词： gas production high-power low-volatile binder thermal battery thin-film cathode

来源：评论

学校读者我要写书评

暂无评论

The discovery of cathode materials for lithium-ion batteries from the view of interdisciplinarity

引用

Interdisciplinary materials 2022年第3期1卷 323-329页

作者： Yunhui Huang State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubeiChina

In honor of Professor John *** for his 100th birthday,this article tries to find the relationship between the discovery of cathode materials for lithium-ion batteries and the interdisciplinary research in his *** original ideas of lithium cobalt oxide,lithium manganese oxide,and LiFePO4 came from his early research in solid state physics and from his strong knowledge of chemical structure and *** examples are given to demonstrate the importance of interdisciplinary interactions among materials,chemistry,and *** the rapid development of rechargeable batteries,such interdisciplinarity is further extended to engineering,information,and even artificial *** there are still many challenges like energy density and safety in the batteries,we are confident that a better solution will be soon found.

关键词： cathode materials interdisciplinarity John B.Goodenough

来源：评论

学校读者我要写书评

暂无评论

Development of Al/Mg Bimetal Prepared by Ultrasonic Vibration-Assisted Compound Casting 75

Development of Al/Mg Bimetal Prepared by Ultrasonic Vibratio...

引用

75th World Foundry Congress, WFC 2024

作者： Li, Qingqing Jiang, Wenming Xu, Yuancai Yu, Linghui Fan, Zitian State Key Lab. of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan430074 China

The coarse Al-Mg intermetallic compounds and oxide film at the Al/Mg bimetal interface strongly limit and weaken the interfacial bonding performance. The introduction of ultrasonic vibration into the liquid medium could provide high-frequency oscillations and induce unique acoustic effects in liquid melt, which have significant impacts on the flow field and temperature field of the liquid medium, and may be aided for the enhancement of the Al/Mg bimetal interface. In this work, the Al/Mg bimetals were fabricated by ultrasonic vibration-assisted solid-liquid compound lost foam casting. The ultrasonic vibration treatment (UVT) was introduced to the Al/Mg interfaces, and the effects of UVT on the interfacial microstructures and mechanical properties were investigated. The results revealed that the microstructures of the Al/Mg interface with UVT were refined and got more homogeneous, and the oxide film at the Al/Mg interface was fractured and eliminated. The microhardness was more uniform, and the bonding strength of the Al/Mg bimetal with UVT was enhanced to 61.4 MPa, with an increase of 89.5%, compared with that of the Al/Mg bimetal without UVT. © 2024 75th World Foundry Congress, WFC 2024. All rights reserved.

关键词： Ultrasonic waves

来源：评论

学校读者我要写书评

暂无评论

Effect of Gd on Interfacial Microstructure and Mechanical Properties of Mg/Al Bimetallic Composites by Compound Casting 75

Effect of Gd on Interfacial Microstructure and Mechanical Pr...

引用

75th World Foundry Congress, WFC 2024

作者： Jiang, Wenming State Key Lab. of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan430074 China

To strengthen the bonding properties of Mg/Al bimetallic composites, rare earth Gd was added to the Mg/Al bimetallic composites manufactured by a novel compound casting, and the interfacial microstructure, mechanical properties and strengthening mechanism of the Mg/Al bimetallic composites with Gd addition were studied. Without Gd addition, there was a thin oxide film consisting of an alumina phase in the Mg/Al bimetallic interface, which hindered the diffusion of Mg2Si phase. After adding the Gd, the oxide film in the interface was broken and dissolved, significantly increasing the diffusion distance of the Mg2Si phase. The Al2Gd and Al8Mn4Gd precipitated in the interface. The primary Al12Mg17 phase and eutectic structure in the interface were greatly refined due to the heterogeneous nucleation and the inhibition of growth caused by the Mg2Si phase and Gd-rich precipitates. The interface was strengthened under the comprehensive effect of the fine grain strengthening and precipitation strengthening of the Mg2Si and Gd-rich precipitates. © 2024 75th World Foundry Congress, WFC 2024. All rights reserved.

关键词： Alumina

来源：评论

学校读者我要写书评

暂无评论

Research Progress on New Technologies of Lost Foam Casting for Aluminum and Magnesium Alloys 75

Research Progress on New Technologies of Lost Foam Casting f...

引用

75th World Foundry Congress, WFC 2024

作者： Jiang, Wenming Fan, Zitian State Key Lab. of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan430074 China

Lost foam casting (LFC) is a precision green casting technology with some special advantages. However, there are some problems in aluminum and magnesium alloys lost foam casting, such as poor filling ability, serious hole defects, coarse solidification microstructure and low mechanical properties. In view of the above problems, this paper mainly introduces the latest research progress of several new technologies of aluminum and magnesium alloy lost foam casting. Vacuum and low pressure lost foam casting technology can ensure the stable filling of liquid metal, improve the aluminum and magnesium liquid filling and filling capacity, and protect the filling process. The vibration solidification and pressure solidification increased the compactness of the castings and refined the microstructure, thereby significantly improves the mechanical properties of the castings. The expendable shell casting technology could solve the pore, carburization as well as inclusion defects of the traditional LFC method, obtaining the castings with the good surface quality. Magnesium/aluminum bimetal lost foam compound casting technology can directly form complex magnesium/aluminum bimetal castings at low cost. These proposed novel LFC technologies will have positive effect for solving the current technological issues and promoting the technological progress for the LFC process. © 2024 75th World Foundry Congress, WFC 2024. All rights reserved.

关键词： Magnesium alloys

来源：评论

学校读者我要写书评

暂无评论

Ultralow-Vertical-Current Magnetization Switching Effect in an All Van Der Waals 2D Heterostructure

引用

Chinese Physics Letters 2025年第2期42卷 239-248页

作者： Hao Wu Li Yang Gaojie Zhang Wen Jin Jie Yu Bichen Xiao Ahmed Annas Wenfeng Zhang Haixin Chang Center for Joining and Electronic Packaging State Key Laboratory of Material Processing and Die&Mold TechnologySchool of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National High Magnetic Field Center and Institute for Quantum Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Shenzhen R&D Center of Huazhong University of Science and Technology Shenzhen 518000China

The manipulation of magnetization and spin polarization using electrical currents represents a fundamental breakthrough in *** has formed the foundation for data storage and next-generation computing ***-transfer torque(STT)and spin-orbit torque(SOT)have emerged as prominent mechanisms in current-driven magnetization ***,these approaches typically require critical current densities in the range of 10^(6) to 10^(9) A·cm^(-2),resulting in significant heat generation during data writing ***,we report the discovery of an ultralow-vertical-current magnetization switching effect in a van der Waals ferromagnetic/ferroelectric heterostructure based on the modulation of the critical magnetic field(H_(C))using small vertical currents,with a critical current density as low as 1.81A·cm^(-2) and an average effective field(H_(eff)/J_(C))as high as 150.3mT·A^(-1)·cm^(2).This unique magnetization switching effect with ultralow-critical-vertical-current densities typically six to nine orders of magnitude lower than those of the STT and SOT provides a new transformative and viable pathway for developing next-generation spintronic and quantum technologies.

关键词： magnetization critical typically

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：