FeP nanoparticles derived from metal-organic frameworks/GO as high-performance anode material for lithium ion batteries

Abstract

Double carbon coated FeP composite (FeP@NC@rGO) was in situ fabricated via the phosphorization process of the as-prepared Prussian blue@graphene oxide (PB@GO) precursor. The FeP nanocrystals were successfully embedded in the nitrogen-doped porous carbon matrix. When used as the anode for lithium ion batteries (LIBs), the FeP@NC@rGO anode shows superior lithium storage properties, delivering a high specific capacity of 830 mA h g−1 after 100 cycles at 100 mA g−1 and excellent rate capability of 359 mA h g−1 at 5 A g−1. The outstanding performance mainly ascribes to the synergistic effect of the double carbon coating and porous structure design. The introduction of porous carbon and graphene coating on FeP nanoparticles greatly enhance the electronic conductivity of the active material and well accommodates the large volume variation of FeP during the cycling process.