Mg(ClO4)2-N,N-Dimethylformamide (Acetonitrile)/NaCl Double Electrolytes for Magnesium-Air Batteries

To limit corrosion and retain activity of magnesium anode, magnesium-air batteries with double solutions: 0.5 M Mg(ClO4)(2)-N,N-dimethylformamide (DMF)/0.6 M NaCl-H2O, 0.5 M Mg(ClO4)(2)-acetonitrile (AN)/0.6 M NaCl-H2O are prepared. Cathodic and anodic reactions proceed in inorganic and organic solutions separately. Discharge performance, discharge morphology, and corrosion behavior of magnesium anode are researched. Results obtained show that organic electrolytes separate anode from the aqueous electrolyte, thus improving anode utilization rate. Due to 0.6 M NaCl solution used in air cathode side, the batteries show higher discharge voltages. A better discharge performance has been observed in double electrolytes at 1 mA center dot cm(-2) discharge. Results of discharge morphology and electrochemical impedance spectroscopy agree well with discharge performance. The discharge mechanism of magnesium anode in different solutions is also discussed.

Automated summary

The use of double solution in magnesium-air batteries can limit corrosion and improve performance, with organic electrolytes enhancing the utilization rate of magnesium anode and salt solution on the air cathode side increasing discharge voltage.