| Autor: |
Fanglei Tong, Xize Chen, Shanghai Wei, Jenny Malmström, Joseph Vella, Wei Gao |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Journal of Magnesium and Alloys, Vol 9, Iss 6, Pp 1967-1976 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2213-9567 |
| DOI: |
10.1016/j.jma.2021.08.022 |
| Popis: |
Four Mg-xZn-ySn (x = 2, 4 and y = 1, 3 wt.%) alloys are investigated as anode materials for magnesium-air (Mg-air) battery. The self-corrosion and battery discharge behavior of these four Mg-Zn-Sn alloys are analyzed by electrochemical measurements and Mg-air battery tests. The results show that addition of Sn stimulates the electrochemical activity and significantly improves the anodic efficiency and specific capacity of Mg-Zn alloy anodes. Among the four alloy anodes, Mg-2Zn-3Sn (ZT23) shows the best battery discharge performance at low current densities (≤ 5 mA cm−2), achieving high energy density of 1367 mWh g−1 at 2 mA cm−2. After battery discharging, the surface morphology and electrochemical measurement results illustrate that a ZnO and SnO/SnO2 mixed film on alloy anode surface decreases self-corrosion and improves anodic efficiency during discharging. The excessive intermetallic phases lead to the failure of passivation films, acting as micro-cathodes to accelerate self-corrosion. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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