کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7993058 | 1516151 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of carbon nanotubes on the microstructural evolution and hydrogen storage properties of Mg(BH4)2
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
As an important member of complex hydrides, Mg(BH4)2 has a high gravimetric capacity (14.9â¯wt%). In this study, the Mg(BH4)2 was synthesized by the ion exchange method. Afterwards, the Mg(BH4)2 composites with different amounts (2, 5, 10, 25 and 50â¯wt%) of carbon nanotubes (CNTs) were prepared by mechanical milling. Effects of the CNTs on the microstructural evolution and hydrogen storage properties were investigated. The onset desorption temperature of the Mg(BH4)2-5â¯wt% CNTs is decreased to lower temperature around 120â¯Â°C from 275â¯Â°C. The desorption plateau of Mg(BH4)2-5â¯wt% CNTs is the highest, which ascribes that CNTs causes the reaction pathway change. Additionally, the Mg(BH4)2-5â¯wt% CNTs shows the best dehydriding kinetics properties, and can desorb 6.04â¯wt% hydrogen within 2000â¯s at 300â¯Â°C. The dehydrogenation activation energy of the Mg(BH4)2-5â¯wt% CNTs is decreased to 130.2â¯kJ/mol H2, which is much lower than that of pure Mg(BH4)2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 743, 30 April 2018, Pages 11-16
Journal: Journal of Alloys and Compounds - Volume 743, 30 April 2018, Pages 11-16
نویسندگان
Zan Jiang, Jianguang Yuan, Huanqing Han, Ying Wu,