Boosting Elelctrochemcial Performance of Fep₂ Anodes for Li‐Ion Batteries by a Mxene Modification Strategy

Lithium‐ion batteries, characterized by high energy density, are a promising energy storage device. However, the poorly matched kinetics of the electrochemical reaction between the anode and cathode of lithium‐ion batteries make the search for anode materials with high ion‐electron transfer efficiency an urgent task. In this work, Fe 3+ is introduced through the branch‐end negative charge of Ti 3 C 2 to construct a 3D Fe 3+ /Ti 3 C 2 spatial network structure, and then FeP 2 @Ti 3 C 2 is formed by hydrothermal and low‐temperature phosphatization. The 2D nanosheet structure in FeP 2 @Ti 3 C 2 provides more storage sites for Li + ions, and the Ti 3 C 2 contributes to the enhancement of the electrical conductivity of the transition metal phosphide. Because the electronic structure of transition metal phosphides is similar to that of metals, rapid electron transfer and ion diffusion channels are formed in the longitudinal direction between layers. The FeP 2 @Ti 3 C 2 composite material still has a specific capacity of 1194 mAh g −1 after 1000 cycles at 1000 mA g −1 current density. This article provides guidance for the design of 2D materials, and FeP 2 @Ti 3 C 2 composites have great potential for next‐generation energy storage with their unique structure and excellent electrochemical properties.