Construction of Hollow Cobalt Phosphide Heterostructure for High‐Performance Lithium‐Ion Batteries

Transition metal phosphides (TMPs) have been considered as the prospective anode materials for lithium‐ion batteries (LIBs) due to their prominent theoretical capacity. However, their unsatisfactory kinetic performance and ineluctable volume expansion result in rapid capacity decay and the collapse of material structure during cycles, which restrict their commercial application. Herein, a hollow cobalt phosphide with nitrogen‐doped carbon nanotube‐entangled heterostructure(H‐CoP@NCNTs) is constructed using ZIF‐67 as a sacrificial host and serves as an anode for LIBs. The elastic hollow carbon framework as a covering layer for CoP‐based active material can regulate the volume change during cycles. And the multidimensional conductive network with nitrogen‐doped carbon nanotubes wrapped can improve the electron/ion transport. The H‐CoP@NCNTs anode presents a considerable reversible capacity of 754.8 mAh g −1 at 0.1 A g −1 and a long‐cycle stability (418.6 mAh g −1 after 1000 cycles at 2 A g −1 ). This work provides an efficient approach for designing and exploiting advancing TMP‐based anodes.