title: Chemical Inhibition Method to Synthesize Highly Crystalline Prussian Blue Analogs for Sodium-Ion Battery Cathodes.
abstract: The nucleation rate plays a critical role in the synthesis of Prussian blue analogs. Rapid precipitation may lead to a large number of vacancies and a large amount of interstitial water in the material, resulting in poor electrochemical performance in batteries. Hence, sodium citrate is used to compete with [Fe(CN)6]4-to slow down the coordination rates of Ni2+and Mn2+ions with ferrous cyanide ions. The feasibility of the experiment is also confirmed by theoretical analysis. Benefiting from stable crystal structure and the removal of interstitial water, the as-prepared Na2NixMnyFe(CN)6sample exhibits a high reversible capacity of 150 mA h g-1. In addition, a high rate performance of 77 mA h g-1is achieved at a current density of 1600 mA g-1. Most noteworthy, the Coulombic efficiency and specific capacity gradually increase in the first few cycles, which can be ascribed to the formation of a passivation layer on the surface of the electrode. Continuous testing in an electrolyte solution of 1 M NaPF6dissolved in sulfone reveals that the presence of a passivation film is very important for the stability of the electrode.
authors: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China.|Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, PR China.
authors: Renjie
authors: R
authors: Chen
authors: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China.
authors: Yongxin
authors: Y
authors: Huang
authors: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China.
authors: Man
authors: M
authors: Xie
authors: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China.
authors: Ziheng
authors: Z
authors: Wang
authors: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China.
authors: Yusheng
authors: Y
authors: Ye
authors: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China.|Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, PR China.
authors: Li
authors: L
authors: Li
authors: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, PR China.|Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, PR China.
authors: Feng
authors: F
authors: Wu
keywords: Prussian blue analogues; cathode materials; electrolyte; kinetic activation; nucleation rate; sodium ion batteries