锂电池非水电解质盐LiPF_6的制备  

Preparation of LiPF 6 as non aqueous electrolyte salt

作　　者：吴宇平[1] 万春荣[1] 李建军[1] 李阳兴[1] 张泉荣[1] 姜长印[1] 

机构地区：[1]清华大学

出　　处：《电源技术》1999年第A03期99-101,共3页Chinese Journal of Power Sources

摘　　要：综述了ＬｉＰＦ６的制备方法，它主要有如下三种：传统方法、络合法和溶液法。传统的方法是通过ＰＦ５与ＬｉＦ进行反应而制得的，通过改变ＰＦ５与ＬｉＦ的制备条件，如用ＰＸ５与ＨＦ反应制备ＰＦ５，ＨＦ与ＬｉＦ反应制备多孔性ＬｉＦ，可以得到高纯度的ＬｉＰＦ６。使用适宜的络合剂如乙腈、醚、吡啶等与ＬｉＰＦ６形成稳定的络合物，这样，络合法可避免ＬｉＰＦ６的不稳定性带来的储存、处置困难。溶液法则利用锂电池中用的溶剂如ＥＣ、ＤＭＥ等，进行ＬｉＰＦ６的制备，该工艺效率高，可直接用于锂电池。Methods of preparing non aqueous electrolyte salt LiPF 6 have been reviewed in this paper.There are mainly three methods:traditional method,complex method and solution method.The traditional method employs the reaction of PF 5 with LiF and may obtain high pure LiPF 6 by changing the preparation conditions of PF 5 and LiF,for example,preparation of PF 5 using PX 5 and HF,and porous lithium fluoride using LiF and HF.Employing suitable complexes,such as acetonitrile,ether and pyridine to form stable coordination compound with LiPF 6,the complex method can avoid the problems of storage and handling arisen from the unstability of LiPF 6.Through the solution method which utilizes the solvents available in lithium batteries,such as EC,DME,lithium hexafluorophosphate can be prepared at high efficiency and used directly in lithium batteries.

关 键 词：锂电池 电解质盐 制备 六氟磷酸锂 

分 类 号：TM911.05[电气工程—电力电子与电力传动] TM912.2