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Transactions of Nonferrous Metals Society of China

Transactions of Nonferrous Metals Society of China

IF: 4.7
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Preparation and characterization of lithium hexafluorophosphate for lithium-ion battery electrolyte

Published:1 February 2010 DOI: 10.1016/S1003-6326(09)60144-8
Jian-wen LIU, Xin-hai LI, Zhi-xing WANG, Hua-jun GUO, Wen-jie PENG, Yun-he ZHANG, Qi-yang HU

Abstract

A promising preparation method for lithium hexafluorophosphate (LiPF6) was introduced. Phosphorus pentafluoride (PF5) was first prepared using CaF2 and P2O5 at 280°C for 3 h. LiPF6 was synthesized in acetonitrile solvent by LiF and PF5 at room temperature (20?30) for 4 h°C. The synthesized LiPF6 was characterized by infrared spectrometry and X-ray diffraction(XRD). Atomic absorption and ion chromatography results show that the purity of synthesized LiPF6 reaches 99.98%. Thermal stability of self-synthesized LiPF6 was analyzed by differential thermal analysis and thermogravimetry. The results indicate that the self-synthesized LiPF6 has higher purity, lower impurity contents and better thermal stability than the commercial LiPF6.

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