Preparation and characterization of lithium hexafluorophosphate for lithium-ion battery electrolyte

被引:23
|
作者
Liu Jian-wen [1 ]
Li Xin-hai [1 ]
Wang Zhi-xing [1 ]
Guo Hua-jun [1 ]
Peng Wen-jie [1 ]
Zhang Yun-he [1 ]
Hu Qi-yang [1 ]
机构
[1] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Hunan, Peoples R China
关键词
lithium-ion batteries; lithium hexafluorophosphate; phosphorus pentafluoride; acetonitrile;
D O I
10.1016/S1003-6326(09)60144-8
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
A promising preparation method for lithium hexafluorophosphate (LiPF(6)) was introduced. Phosphorus pentafluoride (PF(5)) was first prepared using CaF(2) and P(2)O(5) at 280 degrees C for 3 h. LiPF(6) was synthesized in acetonitrile solvent by LiF and PF(5) at room temperature (20-30 degrees C) for 4 h. The synthesized LiPF(6) was characterized by infrared spectrometry and X-ray diffraction(XRD). Atomic absorption and ion chromatography results show that the purity of synthesized LiPF(6) reaches 99.98%. Thermal stability of self-synthesized LiPF(6) was analyzed by differential thermal analysis and thermogravimetry. The results indicate that the self-synthesized LiPF(6) has higher purity, lower impurity contents and better thermal stability than the commercial LiPF(6).
引用
收藏
页码:344 / 348
页数:5
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