Study on Nanocrystalline Rare Earth Mg-Based System Hydrogen Storage Alloys with AB3-Type
来源期刊：JOURNAL OF RARE EARTHS2006年增刊第2期
论文作者：Tang Renheng Xiao Fangming Lu Qiyun Peng Neng Wang Ying
Key words：nanocrystalline; double-roller rapid quenching; rare earth Mg-based compounds hydrogen storage alloy;
Abstract: A sort of rare earth Mg-based system hydrogen storage alloys with AB3-type was prepared by double-roller rapid quenching method. The alloys were nanocrystalline multi-phase structures composed of LaNi3 phase and LaNi5 phase by X-ray diffraction and scanning electron microscopy analyses, and the suitable absorption/desorption plateau was revealed by the measurement of P-C-I curve. Electrochemical studies indicate that the alloys exhibit good electrochemical properties such as high capacity and stable cycle life, and the discharge capacity is 369 mAh·g-1 at 0.2 C (72 mA·g-1), after 460 cycles, the capacity decay was only 19.4% at 2 C (720 mA·g-1).
Tang Renheng1，Xiao Fangming1，Lu Qiyun1，Peng Neng1，Wang Ying1
(1.Research Institute of Rare Metal, Guangzhou Research Institute of Non-Ferrous Metals, Guangzhou 510651, China)
Abstract:A sort of rare earth Mg-based system hydrogen storage alloys with AB3-type was prepared by double-roller rapid quenching method. The alloys were nanocrystalline multi-phase structures composed of LaNi3 phase and LaNi5 phase by X-ray diffraction and scanning electron microscopy analyses, and the suitable absorption/desorption plateau was revealed by the measurement of P-C-I curve. Electrochemical studies indicate that the alloys exhibit good electrochemical properties such as high capacity and stable cycle life, and the discharge capacity is 369 mAh·g-1 at 0.2 C (72 mA·g-1), after 460 cycles, the capacity decay was only 19.4% at 2 C (720 mA·g-1).
Key words:nanocrystalline; double-roller rapid quenching; rare earth Mg-based compounds hydrogen storage alloy;
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