High power Na-ion rechargeable battery with single-crystalline Na _0.44MnO ₂ nanowire electrode

High power Na-ion rechargeable batteries have attracted much interest recently. In particular, the development of nanostructured electrode materials is essentially required, because the large surface area and short Na-ion diffusion length could provide the high power density. In this paper, we report on the fabrication of single-crystalline Na _0.44MnO ₂ nanowire, and the application to Na-ion rechargeable batteries. The single phase Na _0.44MnO ₂ was successfully synthesized by the hydrothermal method. The SEM and TEM experiments proved that hydrothermally synthesized Na _0.44MnO ₂ has single-crystalline nanowire morphology. The single-crystalline Na _0.44MnO ₂ nanowire electrode in Na-ion batteries showed both the excellent cycle stability and high-charge/discharge-rate capability. Highlights: The single crystalline Na _0.44MnO ₂ nanowires for the sodium ion battery. The excellent cycle stability and high-charge/discharge-rate capability. A potential candidate for the cathode material in the high power Na-ion battery.