کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9868209 1530683 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of MWNTs with different diameters on the electrochemical hydrogen storage capability
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
The effect of MWNTs with different diameters on the electrochemical hydrogen storage capability
چکیده انگلیسی
The difference in electrochemical hydrogen storage of pure multi-walled carbon nanotubes (MWNTs) with different diameters of 10-20 nm, 10-30 nm, 20-40 nm, 40-60 nm and 60-100 nm were investigated. The MWNTs were synthesized by chemical vapor deposition (CVD) using LaNi5 alloy particles as catalyst and were treated in vacuum at 600 °C. Three-electrode system was introduced. The CNTs-Ni electrodes were used as the working electrode, which were prepared by mixing carbon nanotubes (CNTs) and Ni powder in a weight ratio of 1:9 and compressing the mixture into porous nickel collector. Ni(OH)2/NiOOH worked as the counter electrode and Hg/HgO as the reference electrode. 6 mol/L KOH solution acted as the electrolyte. Results showed that MWNTs with different diameters represented a great discrepancy in the electrochemical hydrogen storage capability under the same testing condition. 10-30 nm CNTs has the best electrochemical hydrogen storage capacity with a highest capacity of 480.6 mAh/g and a corresponding discharging plateau voltage of 0.95 V, which were gained at 200 cycle with 200 mA/g charge/discharge current density. However, 60-100 nm CNTs has the lowest capacity of 298.3 mAh/g under the same testing condition. This shows that the tube diameter of CNTs is an important factor that influences its electrochemical hydrogen storage performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 339, Issues 3–5, 23 May 2005, Pages 370-377
نویسندگان
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