| 喷雾干燥-高温固相法制备纳米LiFePO4与LiFePO4/C材料及性能研究（英文） |
| Preparation and Characterization of Nano-particle LiFePO4 and LiFePO4 /C by Spray-drying and Post-annealing Method |
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| 摘要: 采用喷雾干燥-高温固相法制备纳米LiFePO4与LiFePO4/C正极材料，用X-射线衍射，扫描电镜等对合成材料进行了表征，并对以LiFePO4为正极的电池进行了电化学性能测试。结果表明:材料合成最佳煅烧温度为600 ℃;合成过程中由于碳对LiFePO4晶型的生长有一定的抑制作用，相对于纯LiFePO4材料，LiFePO4/C材料粒径更小;并且，在此最佳合成温度下合成的LiF |
| 关键词: 磷酸铁锂 纳米粒子 喷雾干燥 正极材料 |
| 基金项目: |
| Abstract: Pure， nano-sized LiFePO4 and LiFePO4/C cathode materials were synthesized by spray-drying and post-annealing method. The crystalline structure， morphology of particles were investigated by X-ray diffraction， scanning electron microscopy. The electrochemical performances of the sample were also measured. The results show that the optimum processing conditions are thermal treatment for 10 h at 600 ℃. Compared with LiFePO4， LiFePO4/C particles are smaller in size due to the inhibition of crystal growth to a great extent by the presence of carbon in the reaction mixture. The LiFePO4/C composite compound is also found to exhibit good electrode properties with discharge capacities of 139.4， 137.2， 133.5 and 127.3 mAh·g-1 at C/5， 1C， 5C and 10C rates， respectively. In addition， it shows excellent cycle stability at different current density. Even at a high current density of 10C， the discharge capacity of 117.7 mAh·g-1 is obtained (92.4% of its initial value) with only a low capacity fading of 0.15% per cycle. |
| Keywords: LiFePO4 nano-particle spray-drying cathode materials |
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| 高 飞,唐致远,薛建军.喷雾干燥-高温固相法制备纳米LiFePO4与LiFePO4/C材料及性能研究（英文）[J].无机化学学报,2007,23(9):1603-1608. |
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