Effect of rapid quenching on the microstructure and electrochemical characteristics of La0.6Ce0.4Ni3.6Co0.65Mn0.4Al0.2Ti0.05(FeB)0.1 hydrogen storage alloy

稀有金属（英文版）, 2010, 29(6): 583-596. doi: 10.1007/s12598-010-0176-2

^1, , ^2, , ^3, , ^4, , ^5, , ^6, , ^7,

1.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;Whole Win (Beijing) Materials Sci. & Tech. Co., Ltd, Beijing 100083, China

2.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

3.Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

4.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

5.Whole Win (Beijing) Materials Sci. & Tech. Co., Ltd, Beijing 100083, China

6.Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

7.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

基金项目: the National High-Tech Research and Development Program of China(2006AA11A159)

Effect of rapid quenching on the microstructure and electrochemical characteristics of La0.6Ce0.4Ni3.6Co0.65Mn0.4Al0.2Ti0.05(FeB)0.1 hydrogen storage alloy

ZHANG Peilong ^1, , SONG Xiping ^2, , WANG Xiuli ^3, , PEI Pei ^4, , LUO Guiping ^5, , TU Jiangping ^6, , CHEN Guoliang ^7,

1.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;Whole Win (Beijing) Materials Sci. & Tech. Co., Ltd, Beijing 100083, China

2.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

3.Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

4.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

5.Whole Win (Beijing) Materials Sci. & Tech. Co., Ltd, Beijing 100083, China

6.Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

7.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

Keywords： hydrogen storage alloys

In order to improve the cycling stability of AB5 type alloy electrodes, rapid quenching technology and new alloy composition design were employed. A hydrogen storage alloy with nominal composition La0.6Ce0.4Ni3.6Co0.65Mn0.4Al0.2Ti0.05(FeB)0.1 was prepared by vacuum magnetic levitation melting under high purity argon atmosphere, followed by rapid quenching at different cooling rates. XRD results show that all alloys exhibit the single-phase CaCu5-type structure. Electrochemical tests indicate that rapid quenching can slightly improve the cycling life of the alloy. Nevertheless, the high-rate dischargeability of the quenched alloys is lower than that of the as-cast alloy.

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