کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1275135 1497444 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrogen induced amorphization of LaMgNi4 phase in metal hydride alloys
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Hydrogen induced amorphization of LaMgNi4 phase in metal hydride alloys
چکیده انگلیسی
Hydrogen induced amorphization (HIA) of the LaMgNi4 phase at 30 °C was found in three LaMgNi4/LaNi5 two-phase metal hydride (MH)-forming alloys. The amorphization happened at the first dehydrogenation cycle from a fully hydrided alloy, and the process is reversible after annealing at 250 °C for 1 h. The hydrogen storage capacity of the LaMgNi4 phase in an amorphous state is higher than in its crystalline form. A scanning electron microscope study did not observe any significant changes in the shape of grains as a consequence of HIA and re-crystallization. A transmission electron microscope study confirmed the amorphous structure of the LaMgNi4 phase after HIA. These findings suggest a new way to improve the performance of MH alloys when used in electrochemical applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 29, 3 August 2015, Pages 8941-8947
نویسندگان
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