Novel preparation of FeS2/g-C3N4 as enhanced anode materials for LIB

https://doi.org/10.62239/jca.2025.063

Abstract

This study presents a facile one-step synthesis of FeS₂/g-C₃N₄ composites at various temperatures (FSCN-T) for lithium-ion battery anodes. Structural analysis (XRD, FTIR, SEM, EDS) confirmed the successful formation of both phases, with nano-sized FeS₂ uniformly distributed on the g-C₃N₄ matrix. Electrochemical testing revealed that the FSCN-550 sample delivered optimal performance, maintaining a discharge capacity of ~240 mAh/g after 300 cycles with a Coulombic efficiency above 99%. This enhanced stability and capacity are attributed to a robust composite structure and limited g-C₃N₄ decomposition at the optimal temperature. The results position FSCN-550 as a promising high-performance anode material.