Synthesis and characterization of MnCo2O4 microspheres based air electrode for rechargeable sodium-air batteries |
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| Affiliation: | 1. University of Belgrade, Institute of Chemistry, Technology and Metallurgy, Department of Chemistry, Njego?eva 12, 11000 Belgrade, Serbia;2. University of Belgrade, Vin?a Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia;3. University of Belgrade, Institute of Chemistry, Technology and Metallurgy, Department of Catalysis and Chemical Engineering, Njego?eva 12, 11000 Belgrade, Serbia |
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| Abstract: | In this work, the nanosized porous MnCo2O4 microspheres were synthesized by a hydrothermal method and their electrochemical behaviors were investigated based on a carbon supported composite air electrode for rechargeable sodium-air batteries. Under dry air test condition, the MnCo2O4/C air electrode demonstrated a stable working voltage of around 2.1 V vs. Na+/Na and a high initial discharge capacity of 7709.4 mA h g?1, based on the active material mass, at a current density of 0.1 mA cm?2. By a limit on the depth of discharge, the cell exhibited a specific capacity of 1000 mA h g?1 with a high cycling stability up to 130 cycles. The considerable electrocatalytic activity suggests that the as-proposed MnCo2O4 is a highly efficient catalyst as air electrode for rechargeable sodium-air batteries. |
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| Keywords: | Sodium-air batteries Air electrode Electrochemical properties |
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