Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1275546 | International Journal of Hydrogen Energy | 2006 | 5 Pages |
Abstract
AB5-type nanocrystalline hydrogen storage alloy was prepared by a twin-roll process. X-ray diffraction (XRD), scanning electron microscope (SEM), pressure–composition isotherms (PCT), and charge–discharge cycling were used to characterize its performances. The alloy has a hexagonal CaCu5-type structure and a uniform crystallite size of about 40 nm. It shows good high-rate discharge ability (HRD). The initial discharge capacity of the alloy is high up to 312 mAh/g, and its capacity loss is low, only about 20% after 400 cycles under 640 mA/g. At the discharge current density of 2000 mA/g, the high-rate discharge ability (HRD) is 90% and the discharge capacity 211mAh/g after 400 cycles, 85% of the initial capacity.
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Authors
Dongsheng Lu, Weishan Li, Shejun Hu, Fangming Xiao, Renheng Tang,