Uniform nanocrystalline AB5-type hydrogen storage alloy: Preparation and properties as negative materials of Ni/MH battery
| Autor: | Ren-heng Tang, Weishan Li, Dongsheng Lu, Shejun Hu, Fang-ming Xiao |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Battery (electricity)
Materials science Renewable Energy Sustainability and the Environment Scanning electron microscope Alloy Energy Engineering and Power Technology engineering.material Condensed Matter Physics Nanocrystalline material Hydrogen storage Crystallography Fuel Technology Nanocrystal Chemical engineering engineering Crystallite Capacity loss |
| Zdroj: | International Journal of Hydrogen Energy. 31:678-682 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2005.07.006 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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