Abstract
A novel eco-friendly synthesis of LiFe0.25Mn0.75PO4/C@ reduced graphene oxide (rGO) was carried out. The effects of different grinding-drying process and reduced graphene oxide (rGO) modification on the morphology and electrochemical performance of the synthesized LiFe0.25Mn0.75PO4 materials were studied in detail. The studies show that the sanding assistant spray drying process can effectively refine the particle size of LiFe0.25Mn0.75PO4/C materials with uniform dispersion. The uniform nano size combination of rGO and carbon coating significantly reduce the charge-transfer impedance of electrode materials, and improve the conductivity and electrochemical properties of the materials. The optimization results show that LiFe0.25Mn0.75PO4/C@rGO materials display the most favorable kinetic behavior and the best electrochemical reversibility, with the specific discharge capacity of 143.8, and 139.8 mAh g−1 at 1 C and 2 C. After 100 cycles at 1 C, the capacity retention maintains 97.64%, showing a promising application prospect for lithium-ion batteries.
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