Directional synthesis of Ni2P nanoflakes with highly porous walls for electrochemical energy storage application

Abstract Design/fabrication of highly conductive porous metal phosphides is very attractive for construction of advanced cathodes for alkaline batteries. In this work, we report a facile hydrothermal-phosphorization method for fabrication of conductive porous Ni 2 P nanowall arrays. Cross-linked nanoparticles work together forming interconnected Ni 2 P nanowall arrays on nickel foam. Coupled with activated carbon (AC) anode, the integrated Ni 2 P nanowall arrays cathode exhibits notable energy storage performance with high capacity (125 mAh g −1 ), good high-rate ability and long-term cycling stability (99% retention after 6000 cycles at 1 Ag −1 ) due to the conductive nanowall configuration with fact reaction kinetics. It is prospected that the proposed synthetic strategy is useful for rational construction of next-generation advanced metal phosphides for applications in sensing, catalysis and energy storage.