Local high-concentration low-temperature electrolyte and preparation method thereof

The invention provides a local high-concentration low-temperature electrolyte and a preparation method thereof, and belongs to the field of lithium ion batteries. Under the condition of not changing the existing process, the lithium salt which is low in price and easy to obtain is used as the lithium salt of the local high-concentration electrolyte and is matched with the additive to prepare the excellent low-temperature electrolyte. The local high-concentration low-temperature electrolyte is simple in preparation process, wide in raw material source, low in cost and suitable for commercial development. Meanwhile, the low-temperature performance of the lithium ion battery can be effectively improved. 本发明提供了一种局部高浓度低温电解液及其制备方法，属于锂离子电池领域。在不改变现有工艺条件下，将低价易得的锂盐作为局部高浓度电解液的锂盐，同时搭配添加剂，制备优异低温电解液。这种局部高浓度低温电解液制备工艺简单，原料来源广泛，成本低，适合商业化发展。同时可以有效提高锂离子电池的低温性能。