Rechargeable batteries composed of low-cost and abundant materials operating at room temperature are attractive for grid-scale energy storage application Sodium-ion battery is thought of as an ideal candidate for secondary battery. Hence, ultra-long nanorods of single-crystalline Na0.44MnO2 have been synthesized by co-precipitation method followed by high-temperature calcination. The obtained powder is pure phase with an orthorhombic lattice structure and the morphology is regular. Their electrochemical properties were thoroughly investigated in assembled Sodium-ion cells using cyclic voltammetry, galvanostatic testing, and electrochemical impedance spectroscopy. With applying the as-prepared Na0.44MnO2 as a cathode material for sodium-ion batteries, it exhibits a high reversible initial capacity of 94.1 mAh g-1 in a voltage range of 2.0-4.0 V vs. Na+/Na at a current density of 50 mA g-1, and a satisfactory cyclability of 93.3% capacity rentention after 200 cycles is performed in our work. The single-crystalline Na0.44MnO2 with an excellent electrochemical performance proves that it is a potential cathode material for sodium-ion battery.
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