Characteristic Investigation of Nano-Crystal Hydrogen Storage Alloys
来源期刊：JOURNAL OF RARE EARTHS2004年增刊第1期
论文作者：Tang Renheng Lu Qiyun Xiao Fangming Huang Lili Peng Neng Wang Ying
Key words：nano-crystal; hydrogen storage alloys; electrochemically characteristic;
Abstract: A Ml (NiCoMnA1)5 hydrogen storage alloys was prepared by double-roller rapid quenching.Its microstructure, electrochemically and kinetic characteristic were studied.A uniform crystal phase with CaCu5 structure could be detected by XRD analyses, whose average grain size is 30 ～ 50 nm and the ratio of c/a of nano-crystal hydrogen storage alloy is larger.The hydrogen absorption/desertion p - C isotherms of alloy show that its fiat-performance is perfect and the magnetic stagnant effect is very little.An simulate cell is used for electrochemical measurement.Electrode is 10C, the capacity decreasing rate via the 450 cycles at 7C is less than 20%.
Tang Renheng1，Lu Qiyun1，Xiao Fangming1，Huang Lili1，Peng Neng1，Wang Ying1
(1.Rare Earth Materials Research Center, Guangzhou Research Institute of Nonferrous Metals, Guangzhou 510651, China)
Abstract:A Ml (NiCoMnA1)5 hydrogen storage alloys was prepared by double-roller rapid quenching.Its microstructure, electrochemically and kinetic characteristic were studied.A uniform crystal phase with CaCu5 structure could be detected by XRD analyses, whose average grain size is 30 ～ 50 nm and the ratio of c/a of nano-crystal hydrogen storage alloy is larger.The hydrogen absorption/desertion p - C isotherms of alloy show that its fiat-performance is perfect and the magnetic stagnant effect is very little.An simulate cell is used for electrochemical measurement.Electrode is 10C, the capacity decreasing rate via the 450 cycles at 7C is less than 20%.
Key words:nano-crystal; hydrogen storage alloys; electrochemically characteristic;
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