کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803935 | 1516475 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of AB2 alloy addition on the phase structures and electrochemical characteristics of LaNi5 hydride electrode
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Hypo-stoichiometric AB5âα (α > 0)-type LaNi5-x%AB2 (x = 1, 5, 10, 20) composite alloys were successfully prepared by sintering the powder mixtures of LaNi5 and AB2-type Laves phase alloy Zr0.9Ti0.1(Mn0.35Ni0.55V0.15)2 as addition. The phase structure and electrochemical characteristics of the composite alloys were investigated by means of XRD, EDS and electrochemical measurements. It was shown that LaNi5-x%AB2 (x = 1, 5, 10, 20) composite alloys have multi-phase structure, the matrix phase is CaCu5 structure of LaNi5 alloy, the second phase is Zr-rich phase which dispersed in the matrix phase as strips. The discharge capacity and rate discharge capacity of LaNi5 alloy electrodes were greatly improved after composite treated by adding AB2 alloy. The maximum discharge capacity of the composite alloy electrodes increased from 188 mAh/g for x = 0 to 305 mAh/g for x = 10, and the rate discharge capacity of the composite alloy for x = 5 at the current density of 300 and 2040 mA/g was 97 and 55% of that of the alloy at 60 mA/g, respectively. The electrochemical characteristics of LaNi5 alloy at low temperature were also significantly improved by adding AB2 alloy. The discharge capacity of LaNi-5%AB2 composite alloy electrode at 233 K was up to 215 mAh/g.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 392, Issues 1â2, 19 April 2005, Pages 268-273
Journal: Journal of Alloys and Compounds - Volume 392, Issues 1â2, 19 April 2005, Pages 268-273
نویسندگان
Shu-Min Han, Min-Shou Zhao, Zhong Zhang, Yang-Zeng Zheng, Tan-Fu Jing,