In-Situ Formation of Hollow Hybrids Composed of Cobalt Sulfides Embedded within Porous Carbon Polyhedra/Carbon Nanotubes for High-Performance Lithium-Ion Batteries

3D hollow hybrid composites with ultrafine cobalt sulfide nanoparticles uniformly embedded within the well‐graphitized porous carbon polyhedra/carbon nanotubes framework are rationally fabricated using a green and one‐step method involving the simultaneous pyrolysis and sulfidation of ZIF‐67. Because of the synergistic coupling effects favored by the unique nanohybridization, these composites exhibit high specific capacity, excellent cycle stability, and superior rate capability when evaluated as electrodes in lithium‐ion batteries.