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Effects of Magnesium Content on Structure and Electrochemical Properties of La-Mg-Pr-Al-Mn-Co-Ni Hydrogen Storage Alloys
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zarpelon, L. M. C. Banczek, E. P. Martínez, Luis González Lima, Nádia Bonfilio Costa, Isolda Faria, R. N. Wiezorek, Jörg M. K. |
| Copyright Year | 2018 |
| Abstract | 1e discharge capacity, microstructures, and corrosion resistance of some as-cast alloys represented by the formula La0.7−xMgxPr0.3Al0.3Mn0.4Co0.5Ni3.8, where x� 0.0, 0.1, 0.3, 0.5, and 0.7, were investigated by SEM/EDX, XRD, and electrochemical measurements. 1e partial substitution of La by Mg refined the grain structure while the total substitution changed it from equiaxed to columnar. 1ree phases were detected: a major phase (M), a grey phase (G), and a dark phase (D). 1e compositions analyzed by EDX suggested that theMphasewas close to a LaNi5 phase.With the increase of theMg content, the analyses revealed aGphasewith composition close to a RMg2Ni9 (R� La,Pr) and a D phase close to a MgNi2 phase. 1e XRD analysis and Rietveld refinement corroborated the EDX results.1e corrosion resistance of the alloyswas evaluated in 6.0mol·LKOHsolution, and the results showed that the substitution of La by Mg was beneficial for this alloy property. Nevertheless, Mg addition was deleterious to the discharge capacity of the electrodes. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://downloads.hindawi.com/journals/amse/2018/9284943.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
