申请人:Shanghai Rolechem Co., Ltd.
公开号:EP3825278A1
公开(公告)日:2021-05-26
The present invention relates to the technical field of additives to an electrolytic solution of salt batteries; in particular, the present invention relates to a method for preparing a high-purity bisfluorosulfonylimide salt. The preparation raw materials include at least bisfluorosulfonylimide, and M+nXn-; wherein M is selected from any one of Li, Na, K, Rb and Cs, X is an anion including at least one element of B, O, N, P and Si, and n≥2. In the method for preparing a bisfluorosulfonylimide salt provided by the present disclosure, a conversion rate for a target product is high, there is only a single reaction product with almost no side reactions, and the purity of the product is high; during the implementation, there is substantially no generation of the "three wastes", and the byproducts and solvent can be recycled.
本发明涉及盐电池电解溶液添加剂技术领域,特别是涉及一种高纯度双氟磺酰亚胺盐的制备方法。制备原料至少包括双氟磺酰亚胺和M+nXn-;其中M选自Li、Na、K、Rb和Cs中的任意一种,X为阴离子,包括B、O、N、P和Si中的至少一种元素,n≥2。本公开提供的制备双氟磺酰亚胺盐的方法,目标产物转化率高,反应产物单一,几乎无副反应,产物纯度高;实施过程中基本不产生 "三废",副产物和溶剂可回收利用。