دورية أكاديمية
Enhanced Hydrogen Storage Kinetics of Nanocrystalline and Amorphous Mg2Ni-type Alloy by Melt Spinning
العنوان: | Enhanced Hydrogen Storage Kinetics of Nanocrystalline and Amorphous Mg2Ni-type Alloy by Melt Spinning |
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المؤلفون: | Hui-Ping Ren, Xia Li, Dong-Liang Zhao, Yan Qi, Yang-Huan Zhang, Bao-Wei Li |
المصدر: | Materials, Vol 4, Iss 1, Pp 274-287 (2011) |
بيانات النشر: | MDPI AG, 2011. |
سنة النشر: | 2011 |
المجموعة: | LCC:Technology LCC:Electrical engineering. Electronics. Nuclear engineering LCC:Engineering (General). Civil engineering (General) LCC:Microscopy LCC:Descriptive and experimental mechanics |
مصطلحات موضوعية: | Mg2Ni-type alloy, melt spinning, hydrogen storage kinetics, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85 |
الوصف: | Mg2Ni-type Mg2Ni1−xCox (x = 0, 0.1, 0.2, 0.3, 0.4) alloys were fabricated by melt spinning technique. The structures of the as-spun alloys were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The hydrogen absorption and desorption kinetics of the alloys were measured by an automatically controlled Sieverts apparatus. The electrochemical hydrogen storage kinetics of the as-spun alloys was tested by an automatic galvanostatic system. The results show that the as-spun (x = 0.1) alloy exhibits a typical nanocrystalline structure, while the as-spun (x = 0.4) alloy displays a nanocrystalline and amorphous structure, confirming that the substitution of Co for Ni notably intensifies the glass forming ability of the Mg2Ni-type alloy. The melt spinning treatment notably improves the hydriding and dehydriding kinetics as well as the high rate discharge ability (HRD) of the alloys. With an increase in the spinning rate from 0 (as-cast is defined as spinning rate of 0 m/s) to 30 m/s, the hydrogen absorption saturation ratio () of the (x = 0.4) alloy increases from 77.1 to 93.5%, the hydrogen desorption ratio () from 54.5 to 70.2%, the hydrogen diffusion coefficient (D) from 0.75 × 10−11 to 3.88 × 10−11 cm2/s and the limiting current density IL from 150.9 to 887.4 mA/g. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 1996-1944 |
Relation: | http://www.mdpi.com/1996-1944/4/1/274/; https://doaj.org/toc/1996-1944 |
DOI: | 10.3390/ma4010274 |
URL الوصول: | https://doaj.org/article/6b33b14792a84f61956049a907df7602 |
رقم الأكسشن: | edsdoj.6b33b14792a84f61956049a907df7602 |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 19961944 |
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DOI: | 10.3390/ma4010274 |