In situ synthesis of Ni2P nanostructures on Ni foam for high-performance supercapacitors

In this paper, the Ni2P nanostructures were grown on the surface of Ni foam (NF) via a phosphorization reaction of Ni(OH)(2) nanostructures that were synthesized by a facile, low-cost hydrothermal reaction of NF in 15mM urea solution without nickel salt. Others, the obtained NF loaded by Ni2P nanostructures (Ni2P-NF) can be used as a binder-free electrode. Electrochemical testing was used to research the electrochemical performances of the Ni2P-NF as supercapacitors electrode. Results showed that the Ni2P-NF electrode displays remarkable specific capacitance of 2031mFcm(-2) (2539Fg(-1)) at the current density of 1mAcm(-2) (2859mFcm(-2) (3574Fg(-1)) at the potential scan rate of 5mVs(-1)), good rate capability, and prominent cycle stability (the capacitance retention is 89.3% after 2500 cycles). Therefore, the self-supported Ni2P-NF is an excellent electrode for high-performance supercapacitors.