生物质碳复合LiMn0.6Fe0.4PO4/C正极材料及其电化学性能OA

Lithium manganese iron phosphate(LiMnxFe1-xPO4,LMFP)with olivine structure has re-ceived rising attention from scholars as a representative of the new generation of energy storage mate-rials.However,the inherent limitations of its structure-lower electronic and ionic conductivities and slow electrochemical reaction kinetics-raise an unavoidable challenge for its further development and application.An economical and environmentally friendly method was used by employing N-doped biomass carbon extracted from grapefruit peel powder(CP)as a conductivity enhancer to address the shortcomings of LMFP.The LMFP/C nanoparticles were effectively anchored onto the irregular nanosheet structure of the N-doped carbon,resulting in the successful synthesis of LMFP/C-CP3 com-posites.This one-stone approach establishes an efficient electron transport network while utilizing the excellent electrical conductivity of N-doped biomass carbon and mitigating particle agglomeration.Experimental results underscore the effectiveness of our approach.The LMFP/C-CP3 composite has a high discharge capacity of 152.14 mAh/g at a current density of 0.1 C,and the capacity retention rate after 500 charge/discharge cycles at 1 C is as high as 95.6％,indicating remarkable cycling stabil-ity.