Effect of citric acid on the performance of LiFePO4 as a cathode material for lithium batteries

LiFePO 4 /C cathode material was prepared with Fe 3 O 4 as iron source by a high temperature ball milling (HTBM) method and the effects of milling temperature were experimentally investigated in this work. The results indicated that high milling temperature improved the crystallinity of LiFePO 4 , but that an unfavorable crystal agglomeration and the phase transformation from LiFePO 4 into LiFeP 2 O 7 could occur when the temperature becomes too high. LiFePO 4 /C synthesized by HTBM at 650℃ exhibited the optimal electrochemical performance: the initial discharge capacities were 152.7, 146.6, 140.3, 130.0, 119.1 and 108.3 mAhg -1 at rates of 0.5, 1.0, 2.0, 5.0 and 10C, respectively; after 50 cycles, the capacities of LiFePO 4 /C sample were 147.0, 135.0, 126.4, 115.4, 105.6 and 95.3 at rates of 0.1, 0.5, 1.0, 2.0, 5.0 and 10C, and their capacity retention were 96.3%, 92.1%, 90.0%, 88.8%, 88.7% and 88.1%, respectively. No obvious capacity decay was observed demonstrating the excellent electrochemical performance of the product prepared by this work.

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Effect of citric acid on the performance of LiFePO4 as a cathode material for lithium batteries

Cited by 3 publications

References 10 publications

Recovery of waste Li foils from spent experimental Li-anode coin cells for LiFePO4/C cathode

Recovery of waste Li foils from spent experimental Li-anode coin cells for LiFePO4/C cathode

Polyethylene Glycol for LiFePO4/C Composites Preparation: Large or Small Molecular Weight

Synthesis of LiFePO4/C with Fe3O4 as Iron Source by High Temperature Ball Milling

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