Hierarchically Porous FeP Nanospindles Wrapped with Nitrogen–Phosphorus-Codoped Carbon for Enhanced Lithium Storage Performance

The hierarchically porous iron phosphide nanospindles with nitrogen–phosphorus-codoped carbon coatings (FeP@NPC) are fabricated via a combination of hydrothermal synthesis and subsequent phosphating treatment, which is extensively researched for elevating the outstanding performance of lithium-ion batteries (LIBs). The as-prepared FeP@NPC nanocomposite manifests a distinguished specific capacity of 1100 mA h g–1 after 200 cycles at 0.2 A g–1, a ranking rate performance with a high capacity of ∼600 mA h g–1 at 5 A g–1, and a reversible long cycling capacity of 951.7 mA h g–1 after 800 cycles at 1 A g–1. The superior properties can be ascribed to the joint contribution of the well-designed porous nanostructure and conductive N, P-codoped carbon coating, which simultaneously facilitates efficient transmission of lithium ions and electrons, contributes to mild volume expansion, and elevates structural stability during the reversible charge–discharge process.