Cover Feature: Low‐Cost and Scalable Ni‐Prussian Blue Analogue//Functionalized Carbon Based Na‐Ion Systems for all Climate Operations (ChemPhysChem 4/2023)

Low cost & quasi solid state Na2Mn0.5Ni0.5Fe(CN)6//NaxFe2O3 hybrid Na-ion batteries for solar energy storage

“…22 We have studied the electrochemical performances of the Ni-PBA/polypyrrole composite, which shows 73.6 mA h g −1 (@ 2C) specific capacity within a 0.05–1.2 V ( vs. Ag/AgCl) window in 1 M Na 2 SO 4 medium. 23 A 1 V rated asymmetric full cell was also developed with Ni-PBA/polypyrrole positive and functionalized carbon black negative electrodes, and it delivers a specific capacity of 28 mA h g −1 (@ 0.2C rate), an energy density of 34 W h kg −1 (@ 20 W kg −1 ), a power density of 100 W kg −1 (@ 18 W h kg −1 ) and good cycle life (70% capacity retention after 300 cycles at 0.2C rate). 23 It is well documented that the Mn-PBA provides good capacity but lower durability, but Ni-PBA exhibits an opposite trend.…”

“…23 A 1 V rated asymmetric full cell was also developed with Ni-PBA/polypyrrole positive and functionalized carbon black negative electrodes, and it delivers a specific capacity of 28 mA h g −1 (@ 0.2C rate), an energy density of 34 W h kg −1 (@ 20 W kg −1 ), a power density of 100 W kg −1 (@ 18 W h kg −1 ) and good cycle life (70% capacity retention after 300 cycles at 0.2C rate). 23 It is well documented that the Mn-PBA provides good capacity but lower durability, but Ni-PBA exhibits an opposite trend. Hence, the combination thereof may be the optimal solution with respect to both capacity and cycle life.…”