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 similar to 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.