Effects of annealing treatment and partial substitution of Cu for Co on phase composition and hydrogen storage performance of La0.7Mg0.3Ni3.2Co0.35 alloy
| Autor: | Jitian Han, Taizhong Huang, Naixin Xu, Zhu Wu, Xianxia Yuan, Yihe Zhang, Jiemei Yu, Guoxin Sun |
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| Rok vydání: | 2012 |
| Předmět: |
Diffraction
Materials science Renewable Energy Sustainability and the Environment Annealing (metallurgy) Alloy Analytical chemistry Energy Engineering and Power Technology Partial substitution engineering.material Condensed Matter Physics Electrochemistry Crystallography Hydrogen storage Fuel Technology Phase composition Desorption engineering |
| Zdroj: | International Journal of Hydrogen Energy. 37:1074-1079 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2011.02.089 |
| Popis: | In this paper, the phase composition, hydrogen absorption/desorption as well as electrochemical characteristics of as-cast and annealed La0.7Mg0.3Ni3.2Co0.35−XCuX alloys were investigated by X-ray diffraction (XRD), pressure composition isotherm (PCT) and electrochemical measurements. The results showed that La2Ni7 phase and LaNi phase coexisted in the as-cast alloys, but only La0.98Ni5.10 phase was detected in the annealed alloys. The maximum and reversible hydrogen storage capacities of the annealed alloys were higher than that of as-cast alloys, with greatly improved plateau performance. The substitution of Cu for Co made the electrochemical discharge capacity of the annealed alloys lower than that of as-cast alloys. |
| Databáze: | OpenAIRE |
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