کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9759254 | 1497702 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of rapid quenching on the microstructures and electrochemical performances of Co-free AB5-type hydrogen storage alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of rapid quenching on the microstructures and electrochemical performances of Co-free AB5-type hydrogen storage alloys Effect of rapid quenching on the microstructures and electrochemical performances of Co-free AB5-type hydrogen storage alloys](/preview/png/9759254.png)
چکیده انگلیسی
In order to compare the effects of the preparation techniques on the electrochemical performances of Co-free AB5-type hydrogen storage alloys, the Co-free AB5-type LaxMm1-x(NiMnSiAlFe)4.9(x=0,0.45,0.75,1.0) hydrogen storage alloys were prepared by casting and rapid quenching. The phase structures and microstructures of the as-cast and quenched alloys were analyzed by XRD, SEM and TEM. The effects of the rapid quenching on the microstructures and electrochemical performances of the specimen alloys were investigated in detail. The obtained results show that, when the amount of the La substitution x=0.75, the discharge capacity of the as-quenched alloy with quenching rate of 10Â m/s is 292Â mAÂ h/g with charge-discharge current density of 60Â mA/g, the capacity retaining rate (Rh) is 61.2% after 300 charge-discharge cycles with current density of 300Â mA/g. When the amount of the La substitution x=1, the discharge capacities of the as-quenched alloy with quenching rate of 10 and 16Â m/s are 300 and 292Â mAÂ h/g, and the capacity retaining rates (Rh) are 62.3% and 65.0%, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 30, Issue 10, August 2005, Pages 1091-1098
Journal: International Journal of Hydrogen Energy - Volume 30, Issue 10, August 2005, Pages 1091-1098
نویسندگان
Yang-huan Zhang, Guo-qing Wang, Xiao-ping Dong, Shi-hai Guo, Xin-lin Wang,