检索结果-内蒙古大学图书馆

Enhanced performance of solid-state Li–O_2 battery using a novel integrated architecture of gel polymer electrolyte and nanoarray cathode

引用

Rare Metals 2018年第6期37卷 527-535页

作者： Liang Xiao Er-Wei Li Jing-Yu Yi Wen Meng Bo-Hua Deng Jin-Ping Liu School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

The present work proposes a novel strategy to fabricate an integrated architecture of gel polymer electrolyte （GPE）-nanoarray cathode for lithium-O2 batteries （LOBs）. As a proof-of-concept experiment, the photo-initiated in situ polymerization of GPE was carried out via incorporating the precursor solution in advance into a self- standing binder-free oxygen electrode of Co3O4 nanosheets array grown on carbon cloth （Co3O4@CC）, forming an integrated GPE-Co3O4@CC architecture. The performance of the solid-state LOBs using the GPE-Co3O4@CC assembly is greatly enhanced compared to the counterparts with a traditional cell structure, in which GPE was sandwiched by a lithium metal and a cathode. The enhanced performance is ascribed to the combination of the in situ polymerization of GPE and the versatile structure of nanoarray electrode, which results in abundant interfacial contacts between GPE and electrode. This work presents an alternative way to develop high-performance solid-state LOBs by combining the advantages of both gel polymer electrolytes and nanoarray electrodes.

关键词： Solid-state Li-O2 battery Gel polymer electrolyte Co3O4 nanosheet Nanoarray electrode Electrolyte-cathode interface

来源：评论

学校读者我要写书评

暂无评论

Study on the thermodynamics and kinetics in the combustion reaction between titanium and boron powders

引用

key Engineering materials 2007年 351卷 189-194页

作者： Wang, K. Fu, Z.Y. Wang, W.M. Wang, Y.C. Wang, H. Zhang, J.Y. Zhang, Q.J. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Combustion synthesis of titanium diboride(TiB2) from titanium(Ti) and boron(B) powders was studied by theoretical calculation and experimental analysis. In high temperature range or in low temperature range, the calculated activation energies are 140KJ/mol or 355KJ/mol respectively, which is described by a change from dissolution-precipitation controlled process to diffusion-controlled process. With the increase of particle size of the raw materials, combustion temperature and propagating rate will both reduce. The propagating rate decreases with the addition of diluents. Further increase of diluents may result in a stop of the combustion wave halfway or even a failure of ignition.

关键词： Reaction kinetics

来源：评论

学校读者我要写书评

暂无评论

Metastable amorphous chromium-vanadium oxide nanoparticles with superior performance as a new lithium battery cathode

引用

Nano Research 2014年第11期7卷 1604-1612页

作者： Jinzhi Sheng Qidong Li Qiulong Wei Pengfei Zhang Qinqin Wang Fan Lv Qinyou An Wei Chen Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing WUT-Harvard Joint Nano Key LaboratoryWuhan University of Technology Wuhan 430070 China

The main drawbacks of vanadium oxide as a cathode material are its low conductivity, low practical capacity and poor cycling stability. Adding Cr can improve its conductivity and a metastable amorphous state may provide higher capacity and stability. In this work, metastable amorphous Cr-V-O nano- particles have been successfully prepared through a facile co-precipitation reaction followed by annealing treatment. As a cathode material for lithium batteries, the metastable amorphous Cr-V-O nanoparticles exhibit high capacity （260 mAh/g at 100 mA/g between 1.5-4 V）, low capacity loss （more than 80% was retained after 200 cycles at 100 mA/g） and high rate capability （up to 3 A/g）.

关键词： Cr2V4O13 nanoparticles metastable amorphous structure lithium battery

来源：评论

学校读者我要写书评

暂无评论

Influence of Fe substitution at Al-site on the microstructure and thermophysical properties of garnet-type (Y0.4Er0.6)3Al5O12 ceramics

引用

Ceramics International 2025年

作者： Wang, Xuanli Wang, Jun Xie, Min Wang, Zhigang Zhang, Yonghe Song, Xiwen School of Materials Science and Engineering Inner Mongolia University of Science and Technology Baotou014010 China Inner Mongolia Key Laboratory of Advanced Ceramic Material and Devices Baotou014010 China Ministry of Education Baotou014010 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China Inner Mongolia North Heavy Industry Group Co. Ltd. Baotou014010 China Department of Chemical Engineering Ordos Vocational College Ordos017000 China

In this study, a series of (Y0.4Er0.6)3(Al1-xFex)5O12 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0) ceramics were prepared by solid phase synthesis. The effects of Fe doping on the phase structure, lattice occupancy, Raman shift, ionic valence state, micromorphology and thermophysical properties of the ceramics were systematically investigated. The results show that all the (Y0.4Er0.6)3(Al1-xFex)5O12 ceramics exhibit a single Y3Al5O12 phase and the valence state of iron is +3. With the increase of Fe doping concentration, both the lattice constant and cell volume gradually expand, which is attributed to the substitution of Al3+ (smaller ionic radius) by Fe3+ (larger ionic radius). This substitution induces lattice distortion that accelerates the sintering process, resulting in an increase in both ceramic density and grain size. In terms of thermophysical properties, significant improvements were observed compared to pure Y3Al5O12 and (Y0.4Er0.6)3Al5O12 ceramics. Specifically, thermal conductivity decreases, and the thermal expansion coefficient increases with higher Fe doping levels. The (Y0.4Er0.6)3(Al0.2Fe0.8)5O12 ceramic exhibits the lowest thermal conductivity (1.31 W/m·K at 1100 °C), approximately 11.5 % lower than that of (Y0.4Er0.6)3Al5O12 (1.48 W/m·K at 1100 °C). Additionally, (Y0.4Er0.6)3Fe5O12 ceramic demonstrates the highest coefficient of thermal expansion (11 × 10−6 K−1 at 1200 °C), which is around 36.3 % greater than that of (Y0.4Er0.6)3Al5O12 (8.07 × 10−6 K−1 at 1200 °C). © 2025

关键词： Sintering

来源：评论

学校读者我要写书评

暂无评论

Ultra-Thin Carbon-Doped Bi_(2)WO_(6) Nanosheets for Enhanced Photocatalytic CO_(2) Reduction

引用

Transactions of Tianjin University 2021年第4期27卷 338-347页

作者： Han Li Junchao Zhang Jiaguo Yu Shaowen Cao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

The photocatalytic reduction of CO_(2) is a promising strategy to generate chemical ***,this reaction usually suf-fers from low photoactivity because of insuffi cient light absorption and rapid charge *** engineering has become an eff ective approach to improve the photocatalytic ***,ultra-thin(~4.1 nm)carbon-doped Bi_(2)WO_(6) nanosheets were prepared via hydrothermal treatment followed by *** ultra-thin nanosheet structure of the cata-lyst not only provides more active sites but also shortens the diff usion distance of charge carriers,thereby suppressing charge ***,carbon doping could successfully extend the light absorption range of the catalyst and remarkably promote charge separation,thus inhibiting *** a result,the as-prepared Bi_(2)WO_(6) photocatalyst with ultra-thin nanosheet structure and carbon doping exhibits enhanced photocatalytic CO_(2) reduction performance,which is twice that of pristine ultra-thin Bi_(2)WO_(6) *** study highlights the importance of defect engineering in photocatalytic energy conversion and provides new insights for fabricating effi cient photocatalysts.

关键词： Defect engineering Bi_(2)WO_(6)nanosheet Charge separation Light absorption

来源：评论

学校读者我要写书评

暂无评论

The Shock Response and Spall Mechanism of Mg-Al-Zn Alloy:Molecular Dynamics Study

引用

Acta Mechanica Solida Sinica 2022年第3期35卷 495-503页

作者： Xiaoyue Yang Shuang Xu Lisheng Liu Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Shock responses of Mg-Al-Zn alloy are investigated by the molecular dynamics(MD)*** wave propagation,plastic deformation behavior and failure mechanism along the[0001]and[1010]orientations are *** both orientations,simulation results show that the shock wave has an obvious double-wave structure(plastic-elastic)under a piston velocity of 1200 m/s.A higher Hugoniot elastic limit(HEL)is observed for[0001]-oriented *** the shock pressure is along the[1010]direction,the distance between plastic and elastic waves is closer,and higher dislocation density and more twins are ***,the spall strength for[1010]-oriented shock is predicted to be *** addition,the wave interactions,HEL and spall strength predicted for Mg-Al-Zn alloy are compared with the experimental results and MD simulation results of Mg single crystal in the *** is concluded that the shock performance of Mg-Al-Zn is better than that of Mg single crystal.

关键词： Mg-Al-Zn Shock compression Molecular dynamics Hugoniot elastic limit Spall strength

来源：评论

学校读者我要写书评

暂无评论

Room-temperature large photoinduced magnetoresistance in semi-insulating gallium arsenide-based device

引用

Chinese Physics B 2018年第6期27卷 394-399页

作者： Xiong He Zhi-Gang Sun State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

It is still a great challenge for semiconductor based-devices to obtain a large magnetoresistance（MR） effect under a low magnetic field at room temperature. In this paper, the photoinduced MR effects under different intensities of illumination at room temperature are investigated in a semi-insulating gallium arsenide（SI-Ga As）-based Ag/SI–Ga As/Ag device. The device is subjected to the irradiation of light which is supplied by light-emitting diode（LED） lamp beads with a wavelength in a range of about 395 nm–405 nm and the working power of each LED lamp bead is about 33 mW. The photoinduced MR shows no saturation under magnetic fields（B） up to 1 T and the MR sensitivity S（S = MR/B） at low magnetic field（B = 0.001 T） can reach 15 T^（-1）. It is found that the recombination of photoinduced electron and hole results in a positive photoinduced MR effect. This work implies that a high photoinduced S under a low magnetic field may be obtained in a non-magnetic semiconductor device with a very low intrinsic carrier concentration.

关键词： GaAs magnetoresistance carrier recombination

来源：评论

学校读者我要写书评

暂无评论

Revitalizing osmium-based catalysts for energy conversion

引用

Energy Reviews 2023年第4期2卷 81-88页

作者： Ding Chen Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

Designing high cost-effective catalysts has been one of the core topics in energy conversion and *** to unique electronic structure and excellent comprehensive properties,Pt-group metal(PGM)based-materials occupy the top region of numerous volcanic curves and are currently difficult to be replaced by abundant tran-sition metal ***,we pay attention to the osmium(Os),as the cheapest and the least noticed PGM in the field of electrocatalysis,with promising application ***,the three main modification strategies(anion modulation,heterostructure construction,substrate engineering)of Os-based catalysts in hydrogen evolution reaction(HER),the structural advantages provided in oxygen evolution reaction(OER),and other energy-related electrocatalysis applications are discussed one by *** addition,we discuss the key problems and countermeasures faced in their further breakthroughs,and look forward to future development trends and ***,the insights in this work will promote the understanding and designation of Os-based catalysts.

关键词： Energy conversion Electrocatalysis Pt-group metals Os-based catalysts

来源：评论

学校读者我要写书评

暂无评论

Mechanisms of crack elimination in directed energy deposited MAR M247 superalloy and effects of laser power on microstructural evolution and mechanical properties

引用

materials Today Communications 2025年 46卷

作者： Mingzhang Chen Xunchen Liu Yitong Wang Lin Hua Zeqi Hu School of Automotive Engineering Wuhan University of Technology Wuhan 430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan 430070 China

MAR M247 is a directionally solidified nickel-based superalloy with excellent high-temperature performance, but it suffers from severe cracking issues during the directed energy deposition (DED) process. Currently, much of the research on crack suppression in nickel-based superalloy has focused on IN738 and Hastelloy X, with limited studies specifically addressing the cracking suppression mechanisms for M247. This study investigates the mechanisms of crack elimination in M247 and the influence of laser power on its microstructural evolution and mechanical properties. Thermodynamic calculations indicate that M247 has higher crack sensitivity indices than IN718 and IN738, making crack suppression a critical challenge. By optimizing DED process parameters, particularly by reducing scan speed and increasing laser power, cracks were effectively eliminated. Numerical simulations reveal that these adjustments reduce thermal stress accumulation, thereby mitigating cracking. Microstructural characterization shows that increasing laser power minimizes internal defects, promotes a trend toward oriented grain growth, decreases transverse grain boundaries perpendicular to the deposition direction, reduces disorientation, promotes texture evolution, and increases Schmid factors. While tensile strength and microhardness remain largely unaffected, ductility is significantly improved. This paper provides valuable insights into crack elimination and mechanical property enhancement in additive manufactured nickel-based superalloy.

关键词： Tensile strength

来源：评论

学校读者我要写书评

暂无评论

Dense dislocations induced ductile SnTe thermoelectric semiconductor over a wide range of temperatures

引用

Journal of materials Science & technology 2023年第13期144卷 213-218页

作者： Houjiang Yang Xiege Huang Bo Duan Luoqi Wu Hongtao Wang Xiaobin Feng Maoyuan Jiang Guodong Li Ling Zhou Pengcheng Zhai Qingjie Zhang Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Most inorganic thermoelectric semiconductors are intrinsically brittle,restricting the application of ther-moelectric ***,developing ductile thermoelectric materials is crucial to thermoelectric technology *** this work,single-phase SnTe bulks with dense dislocations were prepared by melting quenching combined with spark plasma *** resulting SnTe thermoelectric materials exhibited a large compressive strain of∼7.5%at room temperature,originating from high-density pre-existing mobile *** initiation of localized slip bands and preferred slip system were also identified by first-principles *** microstructural characterizations reveal that the thermal activated dislocation emission and migration lead to higher compressive strains at intermediate *** 673 K,the deformation mechanism changed from dislocation mediated to grain boundary mediated plasticity,resulting in an ultra-high compressive strain of∼42%.In sum,new insights into the mechanical behavior of SnTe thermoelectric material over a wide range of temperatures were *** work offers the dislocation engineering strategy to design ductile thermoelectric materials for flexi-ble electronics and energy systems.

关键词： SnTe Ductile thermoelectric materials Deformation mechanism Dislocation engineering

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：