Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7739913 | Journal of Power Sources | 2013 | 4 Pages |
Abstract
The electrochemical performances of Mg-8Li-0.5Y and Mg-8Li-1Y electrodes in 0.7 mol Lâ1 NaCl solution are investigated by methods of potentiodynamic polarization, electrochemical impedance spectroscopy, potentiostatic oxidation and scanning electron microscopy (SEM). Their performances as anodes of Mg-H2O2 semi-fuel cells are also determined. It is found that the Mg-8Li-1Y electrode has higher corrosion resistant ability and electrooxidation activity than that of Mg-8Li-0.5Y electrode in 0.7 mol Lâ1 NaCl solution. The corrosion potential of Mg-8Li-1Y electrode is 60 mV more positive than that of Mg-8Li-0.5Y electrode. The current density of Mg-8Li-1Y electrode is around 2 mA cmâ2 higher than that of Mg-8Li-0.5Y electrode at the discharge potentials of â0.8 V, â1.0 V and â1.2 V, and it is similar to that of Mg-8Li-0.5Y electrode at â1.4 V. The Mg-H2O2 semi-fuel cell with Mg-8Li-1Y anode presents a maximum power density of 59 mW cmâ2 at room temperature, which is higher than that of Mg-8Li-0.5Y anode (53 mW cmâ2). The content of Y in alloys obviously affects the performance of the alloys and the Y content of 1 wt. % is better than 0.5 wt. %.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Yanzhuo Lv, Min Liu, Yan Xu, Dianxue Cao, Jing Feng, Ruizhi Wu, Milin Zhang,