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Abstract: The electrochemical oxidation behaviors of Mg–8Li–3Al–0.5Zn and Mg–8Li–3Al–1.0Zn electrodes in 0.7 mol L−1 NaCl solution are investigated by methods of potentiodynamic polarization, potentiostatic oxidation, electrochemical impedance spectroscopy and scanning electron microscopy. The phase composition of Mg–8Li–3Al–0.5Zn and Mg–8Li–3Al–1.0Zn alloys is analyzed conducted by X-ray diffraction. The performances of Mg–8Li–3Al–0.5Zn and Mg–8Li–3Al–1.0Zn as the anode of Mg–H2O2 semi fuel cells are determined. The effect of Zn content on the corrosion resistant of these Mg–Li-based alloys is studied. It is found that the Mg–8Li–3Al–0.5Zn electrode has higher discharge activity and less corrosion resistance than that of Mg–8Li–3Al–1.0Zn electrode in 0.7 mol L−1 NaCl solution. The Mg–H2O2 semi fuel cell with Mg–8Li–3Al–0.5Zn anode presents a maximum power density of 100 mW cm−2 at room temperature, which is higher than that of Mg–8Li–3Al–1.0Zn anode (80 mW cm−2). The performance of semi fuel cell with the Mg–8Li–3Al–0.5Zn electrode is better than that with Mg–8Li–3Al–1.0Zn electrode, especially at higher current density (>30 mA cm−2). [Copyright &y& Elsevier]

Abstract: The electrochemical performances of magnesium, magnesium–lithium–aluminum–cerium and magnesium–lithium–aluminum–cerium–yttrium as the anode of magnesium–hydrogen peroxide semi-fuel cells have been studied by methods of potentiodynamic, potentiostatic and electrochemical impedence measurements. The surface morphologies of magnesium and its alloys have been examined by scanning electron microscopy (SEM). It has been found that magnesium–lithium–aluminum–cerium and magnesium–lithium–aluminum–cerium–yttrium electrodes are less corrosion resistant than that of magnesium electrode in 0.7molL−1 NaCl solution and the corrosion current density decreases with the following order: magnesium