Journal
JOURNAL OF POWER SOURCES
Volume 239, Issue -, Pages 265-268Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.03.112
Keywords
Magnesium-lithium-based alloys; Electrochemical performances; Anode material; Magnesium-hydrogen peroxide semi-fuel cells
Funding
- National Natural Science Foundation of China [21203040]
- Natural Science Foundation of Heilongjiang Province of China [B201201]
- Fundamental Research Funds for the Central Universities [HEUCF201210010]
- Specialized Research Fund for the Doctoral Program of Higher Education [20102304110001]
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The electrochemical performances of Mg-8Li-0.5Y and Mg-8Li-1Y electrodes in 0.7 mol L-1 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 L-1 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 cm(-2) higher than that of Mg-8Li-0.5Y electrode at the discharge potentials of -0.8 V, -1.0 V and -1.2 V, and it is similar to that of Mg-8Li-0.5Y electrode at -1.4 V. The Mg-H2O2 semi-fuel cell with Mg-8Li-1Y anode presents a maximum power density of 59 mW cm(-2) at room temperature, which is higher than that of Mg-8Li-0.5Y anode (53 mW cm(-2)). 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. %. (C) 2013 Elsevier B.V. All rights reserved.
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