Effect of annealing treatment on hydrogen storage properties of La-Ti-Mg-Ni-based alloy |
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| Authors: | JIANG Weiqing MO Xiaohua WEI Yinyan ZHOU Zhengcheng GUO Jin |
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| Affiliation: | [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 |
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| Abstract: | 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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| Keywords: | La-Ti-Mg-Ni-based hydrogen storage property annealing electrochemical performance rare earths |
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