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Acta metallurgica Sinica(English Letters) 2003年第3期16卷 192-196页

作者： S.M.Han M.S.Zhao Y.Z.Zeng Department of Environmental and Chemical Engineering Yanshan University Qinhuangdao 066004China Key Laboratory of Rare Earth Chemistry and PhysicsChangchun Institute of Applied Chemistry The Chinese Academy of SciencesChangchun 130022 ChinaDepartment of Environmental and Chemical Engineering Yanshan University Qinhuangdao 066004China Key Laboratory of Rare Earth Chemistry and PhysicsChangchun Institute of Applied Chemistry The Chinese Academy of SciencesChangchun 130022 ChinaDepartment of Environmental and Chemical Engineering Yanshan UniversityQinhuangdo 066004 China

The crystal structure, the phase composition and the electrochemical characteristics of Zr0.9Ti0.1(Ni1.1Mn0.7V0.2)x (x=0.90, 0.95, 1.00, 1.05) alloys were investigated by means of XRD, SEM, EDS and electrochemical measurements. It was shown that all alloys are multiphase with C15 Laves phase as a main phase along with C14 phase and some secondary phases. And the amounts of the C14 phase and secondary phases in the four alloys increases with decreasing x. The results indicated that the various stoichiometric ratios have great effects on the electrochemical characteristics such as the maximum discharge capacity, discharge rate capability and self-discharge properties etc. for Zr0.9Ti0.1(Ni1.1Mn0.7 V0.2)X (x=0.90, 0.95, 1.00, 1.05) alloys. The hyper-stoichiometric Zr0.9 Ti0.1(N1.1Mn0.7 V0.20)1.05 exhibits the maximum discharge capacity of 332mAh-g-1. The C14 phase and secondary phases seems to improve discharge rate capability of the alloys.

关键词： metal hydride electrode microstructure electrochemical characteristics non-stoichiometric ratio

electrode properties and phase composition of Ti_(0.5)Ni_(0.25)Al_(0.25) hydrogen storage alloys and theoretical simulation

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Transactions of Nonferrous metals Society of China 2010年第10期20卷 1899-1905页

作者：吴军徐艳辉陈长聘郑军伟李德成 Institute of Electrochemical Power Sources Soochow University Department of Materials Science and Engineering Zhejiang University

Ti0.5Al0.25Ni0.25 alloy prepared by vacuum induction melting was *** phase composition was analyzed with X-ray technique and EDS analysis,and its electrochemical properties were investigated at various *** reaction kinetic parameters were also studied with proper electrochemical *** influence of the secondary corrosion reaction on the anodic linear polarization measurement was also analyzed by theoretical *** results show that,proper ball-milling with nickel powders is beneficial to electrochemical *** theoretical simulation proves that,the existence of the side reaction can disturb the measurement of electrochemical reaction kinetic parameters.

关键词： hydrogen storage alloy electrochemical kinetics metal hydride electrode theoretical simulation

Electrochemical Properties and Crystal Structure of Rare Earth AB_(3.5)-Type Alloy as Negative electrode Material in MH-Ni Battery

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Journal of Rare Earths 2003年第S1期21卷 162-164页

作者：张新波柴玉俊印文雅赵敏寿 Key Laboratory of Rare Earth Chemistry and Physics Changchun Institute of Applied ChemistryChinese Academy of Sciences

The electrochemical characteristics and crystal structure of metal hydride electrode of AB_(3.5)-type alloy was studied. The electrochemical properties of the metal hydride electrode were investigated at room temperature and -30 ℃. The partial substitution of Ni by Al element causes an expansion of the lattice cell and increases the specific capacity and rate discharge ability of the alloy.

关键词： metal hydride electrode electrochemical properties MH-Ni battery lattice cell rare earths

Degradation Behavior of Electrochemical Performance of Sealed-Type Nickel/metal hydride Batteries

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Journal of Rare Earths 2003年第3期21卷 341-346页

作者：李丽吴锋杨凯 School of Chemical Engineering and Environmental Science Beijing Institute of TechnologyNational Development Center of Hi-Tech Green Materials

The degradation mechanism of electrochemical performance of sealed type nickel/metal hydride batteries was investigated. The results indicate that the degradation behavior of Ni/MH battery is not only owing to the lack of electrolyte, but also the deterioration of the active materials on the positive and negative electrodes of Ni/MH batteries. Scanning electron micrographs (SEM), X ray diffraction (XRD) and laser granularity analyses are presented. The particle pulverization and oxidation during charge/discharge are identified as the main causes for deterioration of the negative and positive electrode in nickel/metal hydride batteries, as well as the cross section cracking of both anode and cathode.

关键词： degradation behavior metal hydride electrode cycle life rare earths

Structure and electrochemical characteristics of LaNi_5-Ti_(0.10)Zr_(0.16)V_(0.34)Cr_(0.10)Ni_(0.30) composite alloy electrode

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Journal of Rare Earths 2010年第5期28卷 774-780页

作者：王艳芝赵敏寿 College of Environmental and Chemical Engineering Yanshan University State Key Laboratory of Metastable Materials Science and Technology Yanshan University

Composite LaNi5+x wt.% Ti0.10Zr0.16V0.34Cr0.10Ni0.30 (x=0, 1, 5, 10) alloys were prepared by two-step re-melting. X-ray diffractometer (XRD), scanning electron microscopy (FESEM), energy dispersive spectrometry (EDS), inductively coupled plasma (ICP) and electrochemical impedance spectroscopy (EIS) analyses showed that the matrix phase of LaNi5 alloy with CaCu5 structure remained unchanged after additive alloy was added, the amount of the second phase increased with increasing x. The synergetic effect withi...

关键词： Ni/MH battery metal hydride electrode composite alloy electrochemical properties kinetic properties rare earths

Characteristics of multi-component Ml-based hydrogen storage alloys and their hydride electrodes

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Rare metals 2002年第1期21卷 74-78页

作者： LIQuan'an CHENYungui TUMingjing DepartmentofMaterialsScienceandEngineering LuoyangInstituteofTechnologyLuoyang471039China DepartmentofmetalMaterials SichuanUniversitychengdu610065China

A series of multi-component M1-based hydrogen storage alloys witha cobalt atomic ratio of 0.40-0.75 were prepared. The electrochemicalproperties under different charge-discharge conditions and PCTcharaceristics measured by electrochemical method were *** addition of other alloying elements for partial substitution ofCo low- ers the hydrogen equilibrium pressure and discharge capacity,but improves the cycling stability and makes the alloys keep nearlythe same rate discharge capability and high-temperature dischargecapability as those of the compared alloy. The reasons werediscussed.

关键词： rare earth alloy low-Co hydrogen storage alloy metal hydride electrode electrochemical property

Influence of Doped Elements on Electrochemical High Temperature Performance of La-riched Hydrogen Storage Material

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Journal of Wuhan University of Technology(Materials Science) 2003年第2期18卷 25-28页

作者：李志尊 Ordnance Engineering College

The effects of small amounts of added elements such as aluminum, titanium and zirconium to MlNi 3.8(CoMn) 1.2 on its electrochemical performances and performances at high temperatures were *** is found that the addition of aluminum brings about a significant increase in the discharge capacity at high temperatures,and the capacity decay during repeated charge-discharge cycles and the self-discharge are both suppressed, while the rate capability *** alloy containing zirconium exhibits a longer cycle life and a better rate capability,but a much lower discharge *** addition of titanium improves the rate capability, but the capacity decreases *** X-ray diffraction analysis indicates that a second phase exists in the alloy with additive Zr or Ti,which improves the discharge-rate characteristics,and the superior stability of the alloy with additive Al may be due to the expansion of lattice parameters and cell volume.

关键词： doped elements metal hydride electrode electrochemical performance

Effect of Stoichiometry on Properties of Rare-Earth-Based Hydrogen Storage Alloy for Nickel-metal hydride Secondary Battery

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Journal of Materials Science & Technology 2003年第1期19卷 90-92页

作者： Quan’an LISchool of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, ChinaYungui CHEN and Mingjing TUDepartment of metal Materials, Sichuan University, Chengdu 610065, China Henan Univ Sci & Technol Sch Mat Sci & Engn Luoyang 471003 Peoples R China Sichuan Univ Dept Met Mat Chengdu 610065 Peoples R China

Effect of stoichiometry on microstructures, electrochemical properties and PCT characteristics of the alloys MI（Ni0.71Co0.15-Al0.06Mn0.08）x （MI=Lanthanum-rich Michmetal, x=4.6;.2） have been investigated. The lattice constants a, c, and cellvolumes of non-stoichiometric alloys are bigger than those of the stoichiometric alloy. With the increasing stoichiometry x,the value of a decreases, and the value of c and cell volume increases except for those of the stoichiometric alloy; the plateaupressure of PCT curve, discharge capacity and cycling stability all increase. The alloy with x=5.2 shows the highest dischargecapacity and the best cycling stability among the studied alloys.

关键词： Hydrogen storage alloy metal hydride electrode Rare earth Electrochemical property Stoichiometry

Mechanism of RE on the Electrochemical Properties of Multicomponent Hydrogen Storage Alloys of RENi^5 Type

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Journal of Rare Earths 1997年第4期15卷 15-21页

作者：江建军雷永泉孙大林吴京王启东

The electrochemical properties of RE(NiCoMnTi) 5 hydrogen storage alloy with different composition of rare earth(RE=La 1-x-y-z Ce x Nd y Pr z ) components were systematically examined To display the effect of rare earth elements on the electrode properties, the comprehensive electrochemical property graphs including the discharge capacity, high dischargeability and cycling life of alloy electrode vs quasi ternary rare earth composition of multicomponent alloys were drawn by first dividing the component elements into two groups with fixed ratios between the two groups and then using a computer program for engineering graphics By the optimizaiton of the La∶Ce∶Nd∶Pr ratio, the alloy RE(NiCoMnTi) 5 shows a maximum capacity of 290 mAh/g and good cycling stability The higher capacity was due to the larger unit cell volume of the alloy with RE=La 0 4 Ce 0 1 Nd 0 3 Pr 0 2 , as determined by X ray diffraction analysis

关键词： Rare earths Hydrogen storage alloys metal hydride electrode Electrochemistry