PEDOT-PSS-Coated FeFe(CN)6 Composite Cathode for Lithium-Ion Batteries with the Improved Electrochemical Performances

Prussian-blue type FeFe(CN)(6) nanocrystals with perfect nanocubic morphology were prepared by a facile hydrolytic precipitation method using Fe(CN)(6)(3-) as a single iron-source. The resulting FeFe(CN)(6) nanocrystals have subsequently been encapsulated within a mixed electronically and ionically conducting polystyrene sulfonic acid (PSS)-doped poly(3,4-ethylenedioxythiophene) (PEDOT) (PEDOT-PSS) with ethylene glycol (EG) as the polar solvent to obtain a high electrical conducting organic-inorganic nanohybrid. The FeFe(CN)(6)/PEDOT-PSS nanohybrid offers discharge capacity of 106.3 mAh . g(-1), which is improved compared to that of the naked FeFe(CN)(6) (94.4 mAh . g(-1)). Also, it demonstrated the improved capacity retention and rate capability, which makes it a promising way for high performance Li-ion batteries for energy storage application.