Effect of annealing treatment on hydrogen storage properties of La-Ti-Mg-Ni-based alloy

The present study dealt with investigations on the effects of annealing on the hydrogen storage properties of La 1.6 Ti 0.4 MgNi 9 alloys.The experimental alloys were prepared by magnetic levitation melting followed by annealing treatment.For La 1.6 Ti 0.4 MgNi 9 alloys,LaNi 5,LaNi 3 and LaMg 2 Ni 9...

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Bibliographic Details
Published inJournal of rare earths Vol. 30; no. 5; pp. 450 - 455
Main Author 蒋卫卿 莫晓华 韦银燕 周正诚 郭进
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2012
Subjects
Annealing
Charge
Discharge
electrochemical performance
Electrodes
Hydrogen storage
hydrogen storage property
Intermetallic compounds
La-Ti-Mg-Ni-based
Melting
Phases
Rare earth metals
rare earths
储氢性能
循环稳定性
放电容量
电化学性能
解吸动力学
退火处理
钛镍
镍基合金
hydrogen storage property
La-Ti-Mg-Ni-based
annealing
electrochemical performance
rare earths
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ISSN1002-0721
2509-4963
DOI10.1016/S1002-0721(12)60071-4

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Summary:The present study dealt with investigations on the effects of annealing on the hydrogen storage properties of La 1.6 Ti 0.4 MgNi 9 alloys.The experimental alloys were prepared by magnetic levitation melting followed by annealing treatment.For La 1.6 Ti 0.4 MgNi 9 alloys,LaNi 5,LaNi 3 and LaMg 2 Ni 9 were the main phases,Ti 2 Ni phase appeared at 900℃.Annealing not only enhanced the maximum and effective hydrogen storage capacity,improved the hydrogen absorption/desorption kinetics,but also increased the discharge capacity.The cyclic stability had been improved markedly by annealing,e.g.,when the discharge capacity reduced to 60% of maximum discharge capacity,the charge/discharge cycles increased from 66（as-cast） to 89（annealed at 800℃） and 127 times（annealed at 900℃）.La 1.6 Ti 0.4 MgNi 9 alloy annealed at 900℃ exhibited better electrochemical properties compared to the other two alloy electrodes.
Bibliography:11-2788/TF
JIANG Weiqing, MO Xiaohua , WEI Yinyan,ZHOU Zhengcheng, GUO Jin（1. Key Laboratory of National Education Ministry for Nonferrous Metals and Materials Processing Technology, College of Physics Science and Technology, Guangxi University, Nanning 530004, China; 2. College of Physics and Electronic Engineering, Guangxi University for Nationalities, Nanning 530006, China; 3. International Centre Jor Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China）
La-Ti-Mg-Ni-based hydrogen storage property annealing electrochemical performance rare earths
The present study dealt with investigations on the effects of annealing on the hydrogen storage properties of La 1.6 Ti 0.4 MgNi 9 alloys.The experimental alloys were prepared by magnetic levitation melting followed by annealing treatment.For La 1.6 Ti 0.4 MgNi 9 alloys,LaNi 5,LaNi 3 and LaMg 2 Ni 9 were the main phases,Ti 2 Ni phase appeared at 900℃.Annealing not only enhanced the maximum and effective hydrogen storage capacity,improved the hydrogen absorption/desorption kinetics,but also increased the discharge capacity.The cyclic stability had been improved markedly by annealing,e.g.,when the discharge capacity reduced to 60% of maximum discharge capacity,the charge/discharge cycles increased from 66（as-cast） to 89（annealed at 800℃） and 127 times（annealed at 900℃）.La 1.6 Ti 0.4 MgNi 9 alloy annealed at 900℃ exhibited better electrochemical properties compared to the other two alloy electrodes.
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ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(12)60071-4