Modified carbothermal reduction method for synthesis of LiFePO4/C composite

作者：Yin Yan-hong^*; Li Shao-yu; Yan Lin-lin; Zhang Hui-shuang; Yang Shu-ting

来源：Transactions of Nonferrous Metals Society of China, 2012, 22(3): 621-626.

DOI：10.1016/S1003-6326(11)61223-5

• LiFePO4/C composite
• molten salt
• carbothermal reduction
• beta-cyclodextrin

With LiAc center dot 2H(2)O as Li precursor, pure olivine phase LiFePO4/C was synthesized at a relatively low temperature (650 degrees C) and short sintering period (4 h) by molten salt carbothermal reduction method. Scanning electron micrograph shows that particle size of the product is about 1 mu m, smaller than that of the sample synthesized with Li2CO3 as Li precursor. Electrochemical measurements prove that LiFePO4/C obtained from LiAc center dot 2H(2)O shows high capacity. The initial discharge capacities are 148 mA.h/g at 0.5C rate and 115 mA.h/g at 5C rate, respectively. After 50 cycles, the capacity retention ratios are 93% and 89% at 0.5C rate and 5C rate, respectively.

• 出版日期2012-3
• 单位河南师范大学