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Lithium iron phosphate coated with carbon (LiFePO_4/C) was synthesized by improved solid-state reaction using comparatively lower temperature and fewer sintering time. The carbon came from citric acid, which acted as a new carbon source. It was characterized by thermogravimetry and differential thermal analysis (TG/DTA), X ray diffractometer (XRD), Element Analysis (EA) and Scanning electron microscope (SEM). We also studied the electrochemical properties of the material. The first discharge capacity of the LiFePO_4/C is 121 mAh5g~-1 at 10 mA5g~-1 at room temperature. When the current density increased to 100 mA5g~-1, the first discharge capacity decreased to 110 mAh5g~-1 and retained 95% of the initial capacity after 100 cycles. The LiFePO_4/C obtained shows a good electrochemical capacity and cycle ability at a large current density.
Lithium iron phosphate coated with carbon (LiFePO_4 / C) was synthesized by improved solid-state reaction using comparatively lower temperature and fewer sintering time. The carbon came from citric acid, which acted as a new carbon source. It was characterized by thermogravimetry and differential Thermal analysis (TG / DTA), X ray diffractometer (XRD), Element Analysis (EA) and Scanning electron microscope (SEM). We also studied the electrochemical properties of the material. The first discharge capacity of the LiFePO 4 / C was 121 mAh 5g ~ -1 at room temperature. When the current density increased to 100mA 5g ~ -1, the first discharge capacity decreased to 110mAh 5g ~ -1 and retained 95% of the initial capacity after 100 cycles. The LiFePO 4 / C shows a good electrochemical capacity and cycle ability at a large current density.