?Synthesis of LiFePO4/Plasma-Reduced Graphene Oxide Composites with Three-Dimensional Porous Conductive Networks for High-Performance Lithium-Ion Batteries

초록

Herein, lithium iron phosphate (LiFePO4, LFP)/plasma-reduced graphene oxide (PrGO) composites (LFP@PrGO) are synthesized to overcome the low electrical conductivity of LFP. Graphene oxide (GO) is mixed with LFP (5.0?15.0 wt%), freeze-dried, and plasma-treated to obtain LFP@PrGO. Electrochemical testing in half cells shows that LFP@PrGO-10 delivers 149.7 mAh g?1 at 1 C and retains 94.7% after 30 cycles. Full cells using LFP@PrGO-10 as the cathode and graphite as the anode exhibit higher capacity and improved coulombic efficiency than pristine LFP cells. This improvement arises from efficient ion transport through a three-dimensional porous network formed by PrGO. Thus, the superior electrochemical performance of LFP@PrGO-10 highlights its potential as a cathode material for high-performance lithium-ion batteries. ? - 본 연구는 2025년도 산업통상자원부 및 산업기술기획평가원(KEIT) 연구비 지원에 의한 연구임(RS-2022-00156073). ? ? Keywords: Lithium iron phosphate, Plasma-reduced graphene oxide, Lithium-ion battery, Electrochemical performance, Three-dimensional porous network