کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5461389 | 1516199 | 2017 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced electrochemical properties of Ti1.4V0.6Ni with Mo2C or WC coating as negative electrodes for Ni-MH battery
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Composites of Ti1.4V0.6Ni coated with Mo2C or WC are prepared through ball milling, and their electrochemical properties are investigated as negative electrode materials in a Ni-MH battery system. Mo2C and WC disperse adequately on the surface of the Ti1.4V0.6Ni alloy to form Ti1.4V0.6Ni@Mo2C and Ti1.4V0.6Ni@WC, respectively. The composites exhibit higher electrochemical hydrogen storage capacity and more stable cycling stability than the bare alloy. Particularly, the capacity conservation rate of Ti1.4V0.6Ni@WC is 67.4% after 200 cycles, and it increases by 29.5% compared with Ti1.4V0.6Ni alloy. A study of the kinetics demonstrates that Mo2C or WC coating accelerates the charge-transfer reaction and increases the electrochemical activity of the Ti1.4V0.6Ni electrode. The improvements to electrochemical properties of Ti1.4V0.6Ni may be due to the proper Mo2C or WC coating with copacetic electrocatalytic activity and anti-pulverization ability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 695, 25 February 2017, Pages 208-214
Journal: Journal of Alloys and Compounds - Volume 695, 25 February 2017, Pages 208-214
نویسندگان
Jing Lin, Zhanyi Cao, Lianshan Sun, Fei Liang, Yaoming Wu, Limin Wang,