Nanostructured potassium and sodium ion incorporated Prussian blue frameworks as cathode materials for sodium-ion batteries

Nanostructured KxNayMnFe(CN)(6) (x + y <= 2) has been synthesized via a facile co-precipitation method. As a cathode, KNMF-3 presents a highly reversible capacity of 133.3 mA h g(-1) at 20 mA g(-1) as well as an excellent rate capacity of 92.0 mA h g(-1) at 600 mA g(-1). This material could be a good candidate as a cathode for sodium-ion batteries.