检索结果-南通市图书馆

Transactions of Nonferrous Metals Society of China 2022年第8期32卷 2510-2526页

作者： Yu-wen-xi ZHANG Lu HAN Lin-bao REN Ling-ling FAN Yang-yang GUO Ming-yang ZHOU Gao-feng QUAN Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Center for Advancing Materials performance from the Nanoscale State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an 710049China Xi’an Rare Metal Materials Institute Co. Ltd.Xi’an 710049China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213China

The effects of yttrium(Y)and yttrium+calcium(Y+Ca)additions on the electrochemical properties and discharge performance of the as-extruded Mg−8Al−0.5Zn−0.2Mn(AZ80)anodes for Mg−air batteries were *** results show that the addition of 0.2 wt.%Y increased the corrosion resistance and discharge activity of AZ80 *** was attributed to the fine and sphericalβ-Mg_17)Al_(12) phases dispersing evenly in AZ80+0.2Y alloy,which suppressed the localized corrosion and severe“chunk effect”,and facilitated the rapid activation ofα-*** addition of 0.2 wt.%Y and 0.15 wt.%Ca generated grain refinement and a reduction of theβ-Mg_17)Al_(12) phase,resulting in a further enhancement in discharge ***,the incorporation of Ca in Mg_17)Al_(12) and Al_(2)Y compounds compromised the corrosion resistance and anodic efficiency of AZ80+0.2Y+0.15Ca ***,AZ80+0.2Y anode exhibited excellent overall discharge performance,with the peak discharge capacity and anodic efficiency of 1525 mA·h·g^(−1) and 67%at 80 mA/cm^(2),13%and 14%higher than those of AZ80 anode,respectively.

关键词： Mg-air battery Mg-Al-Zn anode discharge performance electrochemical behavior

Numerical multi-physical optimization of operating condition and current collecting setup for large-area solid oxide fuel cells

在线全文

学校读者我要写书评

暂无评论

Frontiers in Energy 2024年第3期18卷 356-368页

作者： Chengrong YU Zehua PAN Hongying ZHANG Bin CHEN Wanbing GUAN Bin MIAO Siew Hwa CHAN Zheng ZHONG Yexin ZHOU School of Science Harbin Institute of TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyShenzhen UniversityShenzhen 518060China Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of SciencesNingbo 315201China Energy Research Institute at NTU(ERIAN) Nanyang Technological UniversitySingapore 639798Singapore

Due to the depletion of traditional fossil fuels and the aggravation of related environmental problems,hydrogen energy is gaining more attention all over the *** oxide fuel cell(SOFC)is a promising power generation technology operating on hydrogen with a high *** further boost the power output of a single cell and thus a single stack,increasing the cell area is an effective ***,it was recently found that further increasing the effective area of an SOFC single cell with a flat-tubular structure and symmetric double-sided cathodes would result in a lower areal *** this work,a multi-physical model is built to study the effect of the effective area on the cell *** distribution of different physical fields is systematically *** of the cell performance is also pursued by systematically tuning the cell operating condition and the current collection *** improvement of 42%is revealed by modifying the inlet gas flow rates and by enhancing the current *** the future,optimization of cell geometry will be performed to improve the homogeneity of different physical fields and thus to improve the stability of the cell.

关键词： solid oxide fuel cell(SOFC) large effective area flow rate discharge performance current collection

discharge properties and electrochemical behaviors of AZ80-La-Gd magnesium anode for Mg-air battery

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 Magnesium and Alloys 2021年第6期9卷 2113-2121页

作者： Xingrui Chen Yonghui Jia Qichi Le Henan Wang Xiong Zhou Fuxiao Yu Andrej Atrens Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern University314 MailboxShenyang 110819People’s Republic of China School of Mechanical and Mining Engineering The University of QueenslandSt.LuciaQLD 4072Australia

In this work,the discharge properties and electrochemical behaviors of as-cast AZ80-La-Gd anode for Mg-air battery have been investigated and compared with the AZ80 *** microstructure evolution,electrochemical behaviors and surface morphologies after discharge have been discussed to connect the discharge *** results indicate that the modified AZ80-La-Gd is an outstanding candidate for anode for Mg-air batter,which has high cell voltage,stable discharge curves,good specific capacity and energy,and good anodic *** exhibits the best anodic efficiency,specific capacity and energy of 76.45%,1703.6 mAh·g^(-1)and 2186.3 mWh·g^(-1),respectively,which are20.24%,18.92%and 25.71%higher than values for AZ80 *** excellent discharge performance is attributed to the Al-RE *** refine the Mg_(17)Al_(12)phase and therefore improve the self-corrosion resistance and desorption ability of AZ80 anode.

关键词： Mg-air batteries Magnesium anode discharge performance Electrochemical behaviors RE compound

Microstructure and battery performance of Mg-Zn-Sn alloys as anodes for magnesium-air battery

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2021年第6期9卷 1967-1976页

作者： Fanglei Tong Xize Chen Shanghai Wei Jenny Malmstr^m Joseph Vella Wei Gao Department of Chemical&Materials Engineering Faculty of EngineeringThe University of AucklandNew Zealand MacDiarmid Institute for Advanced Materials and Nanotechnology WellingtonNew Zealand School of Chemical Science Faculty of ScienceThe University of AucklandNew Zealand

Four Mg-x Zn-y Sn(x=2,4 and y=1,3 wt.%)alloys are investigated as anode materials for magnesium-air(Mg-air)*** self-corrosion and battery discharge behavior of these four Mg-Zn-Sn alloys are analyzed by electrochemical measurements and Mg-air battery *** results show that addition of Sn stimulates the electrochemical activity and significantly improves the anodic efficiency and specific capacity of Mg-Zn alloy *** the four alloy anodes,Mg-2Zn-3Sn(ZT23)shows the best battery discharge performance at low current densities(≤5 m A cm^(-2)),achieving high energy density of 1367 m Wh g^(-1)at 2 mA cm^(-2).After battery discharging,the surface morphology and electrochemical measurement results illustrate that a ZnO and SnO/SnO_(2)mixed film on alloy anode surface decreases self-corrosion and improves anodic efficiency during *** excessive intermetallic phases lead to the failure of passivation films,acting as micro-cathodes to accelerate self-corrosion.

关键词： Magnesium alloys Alloy anode Self-corrosion Magnesium-air battery discharge performance

Synthesis and electrochemical performances of LiCoO_2 recycled from the incisors bound of Li-ion batteries

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2009年第4期28卷 328-332页

作者： LI Jinhui ZHONG Shengwen XIONG Daoling CHEN Hao School of Materials and Chemical Engineering Jiangxi University of Science and Technology Ganzhou 341009 China

A new LiCoO2 recovery technology for Li-ion batteries was studied in this paper. LiCoO2 was peeled from the Al foil with dimethyl acetamide （DMAC）, and then polyvinylidene fluoride （PVDF） and carbon powders in the active material were eliminated by high temperature calcining. Subsequently, Li2CO3, LiOH-H20 and LiAc-2H2O were added into the recycled powders to adjust the Li/Co molar ratio to 1.00. The new LiCoO2 was obtained by calcining the mixture at 850℃ for 12 h in air. The structure and morphology of the recycled powders and resulting samples were studied by XRD and SEM techniques, respectively. The layered structure of LiCoO2 synthesized by adding Li2CO3 is the best, and it is found to have the best characteristics as a cathode material in terms of charge-discharge capacity and cycling performance. The first discharge capacity is 160 mAh·g^-1 between 3.0-4.3 V. The discharge capacity after cycling for 50 times is still 145.2 mAh·g^-1.

关键词： LiCoO2 Li-ion batteries discharge performance cycling performance

Corrosion and discharge behavior of Mg−xLa alloys(x=0.0−0.8) as anode materials

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2021年第7期31卷 1979-1992页

作者： Yan SONG Hua-bao YANG Yan-fu CHAI Qing-hang WANG Bin JIANG Liang WU Qin ZOU Guang-sheng HUANG Fu-sheng PAN Andrej ATRENS State Key Laboratory of Mechanical Transmissions College of Materials Science and EngineeringChongqing UniversityChongqing 400044China Chongqing Academy of Science and Technology Chongqing 401123China School of Mechanical and Mining Engineering The University of QueenslandBrisbane Qld4072Australia

The corrosion and discharge performances of binary Mg−xLa(x=0.2−0.8,wt.%)alloys as anode materials for Mg-based batteries were ***,hydrogen evolution,mass loss,electrochemical behavior,and half-cell discharge capabilities were *** results show that the corrosion rate of the Mg matrix was decreased by alloying with La,and this could be attributed to the formation of a protective La2O3-containing film on the surface of the *** Mg−0.2La alloy displayed the lowest corrosion rate,i.e.,2.4 mm/a in a 3.5 wt.%NaCl solution,Furthermore,the discharge performance of Mg−0.4La alloy was superior to that of pure Mg and other Mg−La alloys;this could be associated with the modified microstructure of the Mg−0.4La alloy,which decreased the self-corrosion and accelerated the detachment of the discharge products.

关键词： Mg-based batteries Mg−La alloys corrosion rate discharge performance

Investigation of short-channel design on performance optimization effect of Hall thruster with large height–radius ratio

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2022年第2期24卷 1-9页

作者： Haotian FAN Yongjie DING Chunjin MO Liqiu WEI Hong LI Daren YU Plasma Propulsion Lab Institute of Advanced PowerHarbin Institute of TechnologyHarbin 150001People's Republic of China Key Laboratory of Aerospace Plasma Propulsion Ministry of Industry and Information TechnologyHarbin 150001People's Republic of China

In this study,the neutral gas distribution and steady-state discharge under different discharge channel lengths were studied via numerical *** results show that the channel with a length of 22 mm has the advantage of comprehensive discharge *** this time,the magnetic field intensity at the anode surface is 10%of the peak magnetic field *** analysis shows that the high-gas-density zone moves outward due to the shortening of the channel length,which optimizes the matching between the gas flow field and the magnetic field,and thus increases the ionization *** outward movement of the main ionization zone also reduces the ion loss on the wall ***,the propellant utilization efficiency can reach a maximum of 96.8%.Moreover,the plasma potential in the main ionization zone will decrease with the shortening of the *** excessively short-channel will greatly reduce the voltage utilization *** thrust is reduced to a minimum of 46.1 m ***,because the anode surface is excessively close to the main ionization zone,the discharge reliability is also difficult to *** was proved that the performance of Hall thrusters can be optimized by shortening the discharge channel appropriately,and the specific design scheme of short-channel of HEP-1350 PM was defined,which serves as a reference for the optimization design of Hall thruster with large height–radius *** shortchannel design also helps to reduce the thruster axial dimension,further consolidating the advantages of lightweight and large thrust-to-weight ratio of the Hall thruster with large height–radius ratio.

关键词： Hall thruster large height-radius ratio short-channel design discharge performance numerical simulation

Experimental and numerical investigation of a Hall thruster with a chamfered channel wall

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第10期27卷 484-494页

作者： Hong Li Guo-Jun Xia Wei Mao Jin-Wen Liu Yong-Jie Ding Da-Ren Yu Xiao-Gang Wang Plasma Propulsion Laboratory Harbin Institute of Technology Harbin 150001 China Beijing Institute of Control Engineering Beijing 100190 China Department of Physics Harbin Institute of Technology Harbin 150001 China

A discharge channel with a chamfered wall not only has application in the design of modern Hall thrusters, but also exists where the channel wall is eroded, and so is a common status for these units. In this paper, the laws and mechanisms that govern the effect of the chamfered wall on the performance of a Hall thruster are investigated. By applying both experimental measurement and particle-in-cell simulation, it is determined that there is a moderate chamfer angle that can further improve the optimal performance obtained with a straight channel. This is because the chamfering of the wall near the channel exit can enhance ion acceleration and effectively reduce ion recombination on the wall, which is favorable to the promotion of the thrust and efficiency. However, the chamfer angle should not be too large; otherwise, both the density of the propellant gas and the distribution of the plasma potential in the channel are influenced, which is undesirable for efficient propellant utilization and beam concentration. Therefore, it is suggested that the chamfer shape of the channel wall is an important factor that must be carefully considered in the design of Hall thrusters.

关键词： Hall thruster chamfered wall discharge performance physical mechanism

Preparation of porous Mg electrode by electrodeposition

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2011年第9期21卷 2099-2103页

作者：郑伟伟徐强丁飞张晶刘兴江天津大学化工学院天津300072 天津电源技术研究所天津300381

In order to obtain a porous Mg electrode with a stable skeleton, organic Mg fuel cell （OMFC）, the electrochemical behavior of Mg deposition on Cu and Ni metallic substrates in 1 mol/L EtMgBr/THF solution was investigated by SEM, EDS and electrochemical methods. The experimental results show that Mg can be electrodeposited on both substrates, as a continuous layer on a Cu substrate. Accordingly, an approach for producing a porous Mg electrode with a stable skeleton of OMFC was proposed by means of electrodeposition of Mg on a foamed Ni substrate with a layer of Cu pre-plating. The discharge performance of this porous Mg electrode of OMFC is superior to that of a planar Mg electrode.

关键词： magnesium electrodeposition porous electrode organic electrolyte discharge performance

Physical Properties and Electrochemical performance of Solid K_2FeO_4 Samples Prepared by Ex-situ and in-situ Electrochemical Methods

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2007年第1期15卷 39-43页

作者：徐志花王建明邵海波张鉴清 Department of Chemistry Zhejiang University Hangzhou 310027 China Department of Chemistry Zhejiang University Hangzhou 310027 China Chinese State Key Laboratory for Corrosion and Protection Shenyang 110015 China

K2FeO4 powders were synthesized by the ex-situ and in-situ electrochemical methods, respectively, and characterized by infrared spectrum （IR）, scanning electron microscopy （SEM）, X-ray powder diffraction （XRD） and BET. Their electrochemical performances were investigated by means of galvanostatic discharge and electrochemi-cal impedance spectroscopy （EIS）. The results of physical characterization showed that the two samples have simi-lar structural features, but their surface morphologies and oriented growth of the crystals are different, which results in smaller specific surface area and lower solubility of the ex-situ electrosynthesized K2FeO4 sample. The results of discharge experiments indicated that the ex-situ electrosythesized K2FeO4 electrode has much larger discharge ca-pacity and lower electrode polarization than the in-situ electrosynthesized K2FeO4 electrode. It was found from the results of EIS that lower electrochemical polarization might be responsible for the improvement on the discharge performance of the ex-situ electrosynthesized K2FeO4 electrode.

关键词： K2FeO4 electrosynthesis discharge performance electrochemical impedance spectroscopy (EIS)