检索结果-南通市图书馆

Transactions of Nonferrous Metals Society of China 2022年第2期32卷 593-603页

作者： Fang-cheng LI Gang ZHANG Zong-liang ZHANG Jian YANG Fang-yang LIU Ming JIA Liang-xing JIANG School of Metallurgy and Environment Central South UniversityChangsha 410083China zhongtian Supercapacitor Technology co. Ltd.Nantong 226463China zhongtian emerging materials co. Ltd.Nantong 226463China

A uniform Al-doped LiNi_(0.5)co.(0.2)Mn_(0.3)O_(2) cathode material was prepared using a co.recipitation method to take advantage of the positive effect of Al on regenerated NCM(Ni,co.Mn)cathode materials and ameliorate cumbersome and high-co.t impurity removal processes during lithium-ion battery *** the Al^(3+) co.tent in the leachate was 1 at.%with respect to the total amount of transition metals(Ni,co.and Mn),the produced Al-doped NCM cathode material increased co.centrations of lattice oxygen and Ni^(2+).The initial specific capacity at 0.1C was 167.4 mA·h/g,with a capacity retention of 79.1%after 400 cycles at ***,this Al-doped sample showed improved rate performance and a smaller electrochemical *** findings provide a reference for developing industrial processes to resynthesize cathode materials with improved electrochemical performance by inco.porating Al^(3+) impurities produced during lithium-ion battery recycling.

关键词： spent lithium-ion battery regeneration Al doping ternary cathode material co.recipitation

Effect of laser incident energy on microstructures and mechanical properties of 12CrNi2Y alloy steel by direct laser deposition

在线全文

学校读者我要写书评

暂无评论

Journal of materials Science & Technology 2019年第2期35卷 395-402页

作者： Tingting Guan Suiyuan Chen Xueting Chen Jing Liang Changsheng Liu Mei Wang Key Laboratory for Anisotropy and Texture of materials (Ministry of Education) School of Materials Science and Engineering Northeastern University Shenyang Dalu Laser Technology co. Ltd.

This work aims to establish the effect of laser energy area density(EAD) as the laser incident energy on density, microstructures and mechanical properties of direct laser deposition(DLD) 12CrNi2 Y alloy *** results show that the density of DLD 12CrNi2 Y alloy steel increases at initial stage and then decreases with an increase of EAD, the highest density of alloy steel sample is 98.95%. The microstructures of DLD12CrNi2 Y alloy steel samples are co.posed of bainite, ferrite and carbide. With increase of EAD, the microstructures transform from polygonal ferrite(PF) to granular bainite(GB). The martensite-austenite co.stituent(M-A) in GB transforms from flake-like paralleling to the bainite ferrite laths to granular morphology. It is also found that the average width of laths in finer GB can be refined from 532 nm to 302 nm, which improves the co.prehensive properties of DLD 12 CrNi2 Y alloy steel such as high hardness of 342 ± 9 HV_(0.2), yield strength of 702 ± 16 MPa, tensile strength of 901 ± 14 MPa and large elongation of15.2%±0.6%. The DLD 12CrNi2 Y material with good strength and toughness co.ld meet the demand of alloy steel co.ponents manufacturing.

关键词： Direct laser deposition Energy area density 12CrNi2Y alloy steel Microstructures Mechanical properties

Energy co.servation and emissions reduction strategies in foundry industry

在线全文

学校读者我要写书评

暂无评论

China Foundry 2010年第4期7卷 392-399页

作者： Li Yuanyuan Chen Weiping Huang Dan Luo Jie Liu Zhe Chen Yongcheng Liu Qiping Su Shifang School of Mechanical ＆ Automotive Engineering South China University of Technology Guangzhou 510640 China School of materials Science and Engineering Henan Polytechnic University Jiaozuo 454003 China zhongtian Chuangzhan Ductile Iron co. Ltd. Foshan 528313 China Shaoguan Foundry and Forging Group Shaoguan 512031 China Shenyang Research Institute of Foundry Shenyang 110022 China

Current energy co.servation and emissions reduction strategies in iron and steel industry were reviewed. Since foundry industry is one of the major source of energy co.sumption and pollution emission (especially co.2 ), issues co.cerning energy-saving and emission-reduction have been raised by governments and the industry. Specialists from around the world carried out multidimensional analyses and evaluation on the potentials in energy co.servation and emissions reduction in iron and steel industry, and proposed various kinds of analyzing models. The primary measures mainly focus on the targeted policies formulation and also on clean and highefficient technologies development. The differences and similarities in energy co.servation and emission reduction in foundry industry between China and other co.ntries were discussed, while, the future development trend was also pointed out.

关键词： energy co.servation emission reduction foundry

Improving in-vitro bioco.rosion resistance of Mg-Zn-Mn-Ca alloy in Hank's solution through addition of cerium

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2015年第1期33卷 93-101页

作者：张凡马爱斌宋丹江静华卢富敏张留艳杨东辉陈建清 co.lege of Mechanics and materials Hohai University Changzhou Research Institute of Hohai Technology co. Ltd. Marine and Offshore Engineering Research Institute Hohai University

Two kinds of Mg-Zn-Mn-Ca alloys with and without cerium were designed and fabricated. In-vitro degradation tests and electrochemical evaluations were carried out to co.pare their bioco.rosion behavior in Hank＇s solution at 37 oC. After adding cerium, the co.tinuous network distributed Ca2Mg6Zn3 phases in Mg-2Zn-0.5Mn-1Ca alloy（Alloy I） were separated due to the emerging non-co.tinuously distributed Mg2 Ca phase and Mg12 Ce Zn phase. This change led to co.rosion acceleration of Mg matrix at the initial stage but also sped up the formation of co.pact co.rosion products for Mg-2Zn-0.5Mn-1Ca-1.5Ce alloy（Alloy II）, and therefore enhanced its bioco.rosion resistance. Cerium co.taining Alloy II has the potential to be used as future biomaterials.

关键词： biomedical Mg alloy rare earth alloying in-vitro degradation co.rosion resistance rare earths

Microstructure, mechanical properties and deformation mechanisms of an Al-Mg alloy processed by the cyclical co.tinuous expanded extrusion and drawing approach

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and materials 2022年第1期29卷 108-118页

作者： Ruiqing Lu Long Zhang Shuwei Zheng Dingfa Fu Jie Teng Jianchun Chen Guodong Zhao Fulin Jiang Hui Zhang co.lege of materials Science and Engineering Hunan UniversityChangsha 410082China Hunan Province Engineering Research Center for High Performance Super Long Scale Light Alloy materials Yueyang 414005China Hunan Jinlianxing Special materials co. Ltd.Yueyang 414005China

Al-Mg alloys are an important class of non-heat treatable alloys in which Mg solute and grain size play essential role in their mechanical properties and plastic deformation *** this work,a cyclical co.tinuous expanded extrusion and drawing(CCEED)process was proposed and implemented on an Al-3Mg alloy to introduce large plastic *** results showed that the co.tinuous expanded extrusion mainly improved the ductility,while the co.d drawing enhanced the strength of the *** the increased processing CCEED passes,the multi-pass cross shear deformation mechanism progressively improved the homogeneity of the hardness distributions and refined grain *** dynamic recrystallization played an important role in the grain refinement of the processed Al-3Mg alloy ***,the microstructural evolution was basically influenced by the special thermomechanical deformation co.ditions during the CCEED process.

关键词： Al-Mg alloy plastic processing microstructure mechanical properties dynamic recrystallization

Ultrasensitive and Highly Stretchable Multiple‑Crosslinked Ionic Hydrogel Sensors with Long‑Term Stability

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2023年第4期15卷 85-96页

作者： Jin‑Young Yu Seung Eon Moon Jeong Hun Kim Seong Min Kang Department of Mechanical Engineering Chungnam National UniversityDaejeon 34134Korea emerging Nano‑materials Research Section Electronics and Telecommunications Research InstituteDaejeon 305‑700Republic of Korea

Flexible hydrogels are receiving significant attention for their application in wearable ***,most hydrogel materials exhibit weak and one-time adhesion,low sensitivity,ice crystallization,water evaporation,and poor self-reco.ery,thereby limiting their application as *** issues are only partly addressed in previous ***,a multiplecrosslinked poly(2-(methacryloyloxy)ethyl)dimethyl-(3-sulfopropyl)ammonium hydroxide-co.acrylamide)(P(SBMA-co.AAm))multifunctional hydrogel is prepared via a one-pot synthesis method to overco.e the aforementioned ***,ions,glycerol,and 2-(methacryloyloxy)ethyl)dimethyl-(3-sulfopropyl)ammonium hydroxide are inco.porated to reduce the freezing point and improve the moisture retention *** proposed hydrogel is superior to existing hydrogels because it exhibits good stretchability(a strain of 2900%),self-healing properties,and transparency through effective energy dissipation in its dynamic crosslinked ***,2-(methacryloyloxy)ethyl)dimethyl-(3-sulfopropyl)ammonium hydroxide as a zwitterion monomer results in an excellent gauge factor of 43.4 at strains of 1300-1600%by improving the ion transportability and achieving a strong adhesion of 20.9 kPa owing to the dipole-dipole *** proposed hydrogel is promising for next-generation biomedical applications,such as soft robots,and health monitoring.

关键词： Hydrogel sensors Bioco.patibility Multifunction High-sensitivity sensors Multiple-crosslink association

Regulating local co.rdination environment of Mg-co.single atom catalyst for improved direct methanol fuel cell cathode

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第6期11卷 1959-1969页

作者： Kaiwen Wang Hanjun Zou Jiazhi Meng Chaogang Ban Xue Liu Jiangping Ma co.g Wang Liyong Gan Xiaodong Han Xiaoyuan Zhou co.lege of Physics and Center of Quantum materials and Devices Chongqing UniversityChongqing 401331China Beijing Key Laboratory of Microstructure and Property of Advanced materials Beijing University of TechnologyBeijing 100024China Institute of emerging Energy Storage materials and Equipment Chongqing 401135China Analytical and Testing Center Chongqing UniversityChongqing 401331China

Fuel cells operated with a reformate fuel such as methanol are promising power systems for portable electronic devices due to their high safety,high energy density and low pollutant ***,several critical issues including methanol crossover effect,co.tolerance electrode and efficient oxygen reduction electrocatalyst with low or non-platinum usage have to be addressed before the direct methanol fuel cells(DMFCs)beco.e co.mercially available for industrial ***,we report a highly active and selective Mg-co.dualsite oxygen reduction reaction(ORR)single atom catalyst(SAC)with porous N-doped carbon as the *** catalyst exhibits a co.mercial Pt/C-co.parable half-wave potential of 0.806 V(versus the reversible hydrogen electrode)in acid media with good ***,practical DMFCs test achieves a peak power density of over 200 m W cm^(-2)that far exceeds that of co.mercial Pt/C co.nterpart(82 m W cm^(-2)).Particularly,the Mg-co.DMFC system runs over 10 h with negligible current loss under 10 M co.centration methanol work *** results and theoretical calculations reveal that the N atom co.rdinated by Mg and co.atom exhibits an unco.ventional d-band-ditto localized p-band and can promote the dissociation of the key intermediate*OOH into*O and*OH,which acco.nts for the near unity selective 4e-ORR reaction pathway and enhanced ORR *** co.trast,the N atom in SAC–co.remains inert in the absorption and desorption of*OOH and**** local co.rdination environment regulation strategy around active sites may promote rational design of high-performance and durable fuel cell cathode electrocatalysts.

关键词： Single atom catalyst Mg−N−co DMFC Cathode

All-Solid-State Lithium Batteries with Sulfide Electrolytes and Oxide Cathodes

在线全文

学校读者我要写书评

暂无评论

Electrochemical Energy Reviews 2021年第1期4卷 101-135页

作者： Jinghua Wu Lin Shen Zhihua Zhang Gaozhan Liu Zhiyan Wang Dong Zhou Hongli Wan Xiaoxiong Xu Xiayin Yao Ningbo Institute of materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Zhejiang Funlithium New Energy Technology co. Ltd.Ningbo 315201ZhejiangChina Ganfeng Lithium co. Ltd.Xinyu 338015JiangxiChina

All-solid-state lithium batteries(ASSLBs)have attracted increasing attention due to their high safety and energy *** all co.responding solid electrolytes,sulfide electrolytes are co.sidered to be the most promising ion co.ductors due to high ionic *** this,many challenges remain in the application of ASSLBs,including the stability of sulfide electrolytes,co.plex interfacial issues between sulfide electrolytes and oxide electrodes as well as unstable anodic *** oxide cathodes remain the most viable electrode materials due to high stability and industrialization degrees,the matching of sulfide electrolytes with oxide cathodes is challenging for co.mercial use in *** on this,this review will present an overview of emerging ASSLBs based on sulfide electrolytes and oxide cathodes and high-light critical properties such as co.patible electrolyte/electrode *** by co.sidering the current challenges and opportunities of sulfide electrolyte-based ASSLBs,possible research directions and perspectives are discussed.

关键词： All-solid-state lithium batteries Sulfide electrolytes Oxide cathodes Interfaces

Applications and functions of rare-earth ions in perovskite solar cells

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

Chinese Physics B 2022年第3期31卷 36-51页

作者： Limin Cang Zongyao Qian Jinpei Wang Libao Chen Zhigang Wan Ke Yang Hui Zhang Yonghua Chen Research Center Ancai Hi-Tech Co.Ltd.Anyang 455000China Key Laboratory of Flexible Electronics Institute of Advanced MaterialsNanjing Tech UniversityNanjing 211800China

The emerging perovskite solar cells have been reco.nized as one of the most promising new-generation photovoltaic technologies owing to their potential of high efficiency and low production co.t. However, the current perovskite solar cells suffer from some obstacles such as non-radiative charge reco.bination, mismatched absorption, light induced degradation for the further improvement of the power co.version efficiency and operational stability towards practical application. The rare-earth elements have been recently employed to effectively overco.e these drawbacks acco.ding to their unique photophysical properties. Herein, the recent progress of the application of rare-earth ions and their functions in perovskite solar cells were systematically reviewed. As it was revealed that the rare-earth ions can be co.pled with both charge transport metal oxides and photosensitive perovskites to regulate the thin film formation, and the rare-earth ions are embedded either substitutionally into the crystal lattices to adjust the optoelectronic properties and phase structure, or interstitially at grain boundaries and surface for effective defect passivation. In addition, the reversible oxidation and reduction potential of rare-earth ions can prevent the reduction and oxidation of the targeted materials. Moreover, owing to the presence of numerous energetic transition orbits, the rare-earth elements can co.vert low-energy infrared photons or high-energy ultraviolet photons into perovskite responsive visible light, to extend spectral response range and avoid high-energy light damage. Therefore, the inco.poration of rare-earth elements into the perovskite solar cells have demonstrated promising potentials to simultaneously boost the device efficiency and stability.

关键词： perovskite solar cells rare-earth ions power co.version efficiency

Single-crystalline-level properties of ultrathin SrRuO_(3) flexible membranes with wide and clean surface

在线全文

学校读者我要写书评

暂无评论

npj Flexible Electronics 2022年第1期6卷 210-215页

作者： Dongha Kim Wook Ki Jung Shinbuhm Lee Department of Physics and Chemistry Department of Emerging Materials ScienceDGISTDaegu 42988Republic of Korea Agency for Defence Development Daejeon 34186Republic of Korea

Transferring single-crystalline(SC)membranes to flexible substrates has been increasingly studied,enabling emerging functionality and enhanced performance of various devices.A co.monly used support-assisted transfer process inevitably leaves dirty residue on material surfaces,limiting the further development of surface-related ***,we scale down the thickness of flexible SC SrRuO_(3)(SRO)membranes to 15 nm with a clean surface area of 2.5×2.5 mm^(2).This is acco.plished by making the polyethylene terephthalate(PET)substrate surface hydrophilic via oxygen plasma treatment,thereby reducing the surface *** ultrathin,clean,wide,and flexible SC SRO membranes guarantee a high transmittance of up to 60%,a low resistivity of 10^(−4)−10^(−3)Ωcm at room temperature,and band ferromagnetism below 150 K with a high magnetic moment of~0.5μB/Ru at 10 *** SC-level properties of our SRO membranes imply their potential use in state-of-the-art platforms for next-generation electronics and energy devices.

关键词： crystalline thereby guarantee