Project Description

The sodium ion battery has limited usage of cathode materials due to its large ionic radii. Prussian Blue Analogues (PBA) have appropriate structure to storage sodium ion but low specific capacity and structural stability cause hardship for commercialization. To solve this problem, It have been preferred to improve the performance by substituting R-site metal. In this study, however, we changed the P-site ion to optimize PBA. we synthesized PBA with 5 different transition metals and the Fe[Co3(CN)6] exhibits a specific capacity of 625mAh/g at 0.1C. Furthermore, the result suggests the tendency between Jahn-Teller effect and reversibiltiy of cells. We believed this work provides the possibility of PBA as cathode materials for sodium ion battery and opens new perspectives for optimizing PBA.