Effect of cobalt on the physicochemical properties of a simple LaB5 metal hydride alloy
| Autor: | Renato Canha Ambrosio, Edson A. Ticianelli |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
X-ray absorption spectroscopy
Materials science Absorption spectroscopy Hydrogen Renewable Energy Sustainability and the Environment Hydride Inorganic chemistry Alloy Energy Engineering and Power Technology chemistry.chemical_element engineering.material Catalysis Nickel–metal hydride battery chemistry engineering Electrical and Electronic Engineering Physical and Theoretical Chemistry Cobalt |
| Zdroj: | Journal of Power Sources. 110:73-79 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/s0378-7753(02)00239-2 |
| Popis: | This work reports the results of a systematic study on the effect of Co as substituent for Ni on several physical and electrochemical properties of LaNi4.7−xSn0.3Cox metal hydride alloys, where 0≤x≤0.7. These included the unit cell lattice parameters measured using X-ray diffraction (XRD) and the electronic properties obtained using X-ray absorption spectroscopy (XAS). In general, the presence of cobalt in the alloys causes a decrease on the hydrogen equilibrium pressure and on the rate of capacity decay, and an increase in the cycle life and on the alloy activation time. A negligible effect of Co is observed in the maximum charge storage capacity and on the catalytic activity with respect to the hydrogen oxidation reaction (HOR). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect