کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1281419 | 1497647 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical hydrogen storage properties of the ball-milled PrMg12âxNix + 150 wt% Ni (x = 1 and 2) composites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The electrochemical hydrogen storage properties of the ball-milled PrMg12âxNix + 150 wt% Ni (x = 1 and 2) composites were investigated, and compared with those of the ball-milled PrMg12 + 150 wt% Ni composite. The ball-milled PrMg11Ni-Ni composite has the highest initial discharge capacity (973 mAh/g) and high-rate dischargeability (HRD). The cycle life improves with the increase of Ni content, which was confirmed by the XRD results of the ball-milled composites after 10 cycles. By means of electrochemical impedance spectra, linear polarization and anodic polarization measurements, the electrochemical kinetic parameters were studied. It is suggested that the high hydrogen diffusivity and moderate reaction resistance are responsible for the higher discharge capacity and HRD of the PrMg11Ni-Ni sample, while the lower discharge capacity and HRD of the PrMg10Ni2-Ni sample is probably due to the excessively high reaction resistance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 33, Issue 19, October 2008, Pages 5066-5072
Journal: International Journal of Hydrogen Energy - Volume 33, Issue 19, October 2008, Pages 5066-5072
نویسندگان
Yi Wang, Shizhang Qiao, Xin Wang,