LiFePO
4/C composites were successfully prepared by emuls
ion drip combust
ion in a fluidized bed reactor followed by heat treatment from the
precursor solut
ion; LiNO
3, Fe(NO
3)
3路9H
2O and H
3PO
4 were stoichiometrically dissolved in distilled water. The ordered LiFePO
4 olivine structure could be obtained after the heat treatment of the as-prepared samples was performed at temperature ranges from 500 to 800 掳C in N
2 + 3%H
2 atmosphere. It was also confirmed from the transmiss
ion electron microscopy (TEM) observat
ion with electron diffract
ion spectrometry (EDS) that the final samples were LiFePO
4/C composites with larger secondary particles. The LiFePO
4/C composites were prepared at 600 掳C and then annealed at 700 掳C exhibited a first discharge capacity of 93 mAh g
鈭? at a 0.1 C rate, which corresponded to 55%of the theoretical capacity.
The as-prepared sample at 600 掳C by the emulsion drip combustion was milled in ethanol by a planetary ball-milling and then annealed at 700 掳C for 4 h in N2 + 3%H2 atmosphere. It was clearly seen from scanning electron microscopy(SEM) and TEM images with EDS that the final sample was made up of agglomerates with approximately 100 nm primary particles covered with a thin carbon layer. As a result, LiFePO4/C nanocomposites could be successfully prepared by a combination of emulsion drip combustion and wet ball-milling followed by heat treatment. The LiFePO4/C nanocomposites delivered a first discharge capacity of 147 mAh g鈭? (86%of theoretical capacity) at a 0.1 C rate. The capacity retention after 100 cycles for the cell was 98%at a 1 C rate.