Fabrication of One-Dimensional Mesoporous CoP Nanorods as Anode Materials for Lithium-Ion Batteries

Graphical Mesoporous 1D CoP nanorods were synthesized by a hydrothermal method and subsequent low-temperature phosphorization. As an anode for Li ion batteries, CoP delivers a high discharge capacity (894 mAh g –1 ; 300 cycles) at a current density of 500 mA g –1 . At a current density of 4000 mA g –1 , the rate capacity is 467 mAh g –1 , showing good reversible capacity, cycling stability, and rate capability. One-dimensional mesoporous CoP nanorods have been successfully synthesized via a facile hydrothermal method and subsequent low-temperature thermal phosphorization treatment. At a current density of 500 mA g –1 , CoP nanorods as anode materials for lithium ion batteries deliver a high discharge capacity of 894 mAh g –1 after 300 cycles, with a coulombic efficiency of over 99 %. Even at a high current rate of 4000 mA g –1 , the discharge capacity of the CoP electrode can still retain 467 mAh g –1 . The results suggest that the introduction of cobalt and the special mesoporous nanorods play important roles in enhancing the electrochemical properties. Therefore, this rodlike CoP electrode is competent as a promising anode material for high-performance lithium-ion batteries.