PR和GO双碳源制备高性能LiMn0.8Fe0.2PO4/C/GO正极材料OA

The cathode material LiMn0.8Fe0.2PO ₄/C/GO was prepared via a solvothermal method.Employing phenolic resin(PR)and graphene oxide(GO)as dual carbon sources,the synergistic effect arises where the amorphous carbon derived from PR pyrolysis constructs ion transport channels,while the graphitized carbon sheets formed via GO reduction establish an electron-conductive network.This synergy significantly enhances the material's ion transport efficiency and structural stability.Among the samples,the one containing mass fraction 1.5%GO and 10.5%PR(GO-1.5-10.5)displays the optimal electrochemical performance.Specifically,it has a reversible capacity of 157.3 mAh·g⁻¹ at a current rate of 0.1 C and 123.4 mAh·g⁻¹ at 5 C.When subjected to a current density of 1 C,the discharge specific capacity is 148.9 mAh·g ⁻ ¹ and remained at 140.2 mAh·g ⁻ ¹ before and after 150 cycles,respectively,which demonstrates an impressive capacity retention rate of 94.2%.Moreover,the electrochemical polarization was relatively small,suggesting excellent structural stability.