Corresponding Author

Yong-yao XIA(yyxia@fudan.edu.cn)


We adopted an effective route to prepare the particle size controllable core-shell structure carbon-coated LiFePO4 from different sized FePO4 precursors, varying from 80 nm, 200 nm and 1 μm by an in situ polymerization method integrated with a surface modification technology. The discharge capacities of the three sized LiFePO4/C are, respectively, 162 mAh·g-1, 142 mAh·g-1 and 92 mAh·g-1 at 0.1C rate. The nano-sized LiFePO4-a/C (80 nm) delivers a discharge capacity as large as 100 mAh·g-1 even at 30C, while the macroscopic LiFePO4-c/C (1 μm) exhibits a much poorer discharge capacity of 54 mAh·g-1 under the same current density. The carbon coated LiFePO4 (LiFePO4/C) also shows good chemical stability after the exposure to air atmosphere, in which the uniform carbon layer could prevent the LiFePO4 from reacting with H2O and O2.

Graphical Abstract


LiFePO4, Lithium-ion batteries, cathode materials, in-situ synthesis

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