Citation: Xiu Qin Ou, Guang Chuan Liang, Jin Sheng Liang, Sheng Zhao Xu, Xia Zhao. LiFePO₄ doped with magnesium prepared by hydrothermal reaction in glucose solution[J]. Chinese Chemical Letters, ;2008, 19(3): 345-349. doi: 10.1016/j.cclet.2007.10.052 shu

LiFePO₄ doped with magnesium prepared by hydrothermal reaction in glucose solution

This work was supported by the Ministry of Education of China and the National Natural Science Foundation of China(Nos. 20376010 and 20472012

Received Date: 27 August 2007

Lithium iron phosphate (LiFePO₄) doped with magnesium was hydrothermally synthesized from commercial LiOH, FeSO₄, H₃PO₄ and MgSO₄ with glucose as carbon precursor in aqueous solution. The samples were characterized by X-ray powder diffraction, scanning electron microscopy and constant charge-discharge cycling.The results show that the synthesized powders have been in situ coated with carbon precursor produced from caramel reaction of glucose. At ambient temperature (28±2℃), the electrochemical performances of LiFePO₄ prepared exhibit the high discharge capacity of 135 mAh g^-1 at 5C and good capacity retention of 98% over 90 cycles. The excellent electrochemical performances should be correlated with the intimate contact between carbon and LiFePO₄ primary and secondary particles, resulting from the in situ formation of carbon precursor/carbon, leading to the increase in conductivity of LiFePO₄.
- Lithium iron phosphate,
- Mg doping,
- Hydrothermal reaction,
- Glucose,
- Carbon coated
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