Investigation on the Electrochemical Performances of Mn(2)O(3) as a Potential Anode for Na-Ion Batteries

Currently, the development of the sodium-ion (Na-ion) batteries as an alternative to lithium-ion batteries has been accelerated to meet the energy demands of large-scale power applications. The difficulty of obtaining suitable electrode materials capable of storing large amount of Na-ion arises from the large radius of Na-ion that restricts its reversible capacity. Herein, Mn(2)O(3) powders are synthesised through the thermal conversion of MnCO(3) and reported for the first time as an anode for Na-ion batteries. The phase, morphology and charge/discharge characteristics of Mn(2)O(3) obtained are evaluated systematically. The cubic-like Mn(2)O(3) with particle sizes approximately 1.0–1.5 µm coupled with the formation of Mn(2)O(3) sub-units on its surface create a positive effect on the insertion/deinsertion of Na-ion. Mn(2)O(3) delivers a first discharge capacity of 544 mAh g(−1) and retains its capacity by 85% after 200 cycles at 100 mA g(−1), demonstrating the excellent cyclability of the Mn(2)O(3) electrode. Therefore, this study provides a significant contribution towards exploring the potential of Mn(2)O(3) as a promising anode in the development of Na-ion batteries.