公开(公告)号：US20170294680A1

公开(公告)日：2017-10-12

申请号：US15447784

申请日：2017-03-02

Applicant: StoreDot Ltd.

Inventor： Doron BURSHTAIN ,  Eran SELLA ,  Niles FLEISCHER ,  Hani FARRAN ,  Leora SHAPIRO

IPC: H01M10/0567 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M4/366 ,  H01M4/587 ,  H01M4/628 ,  H01M10/0525 ,  H01M2300/0025

Abstract: Electrolytes, anodes, lithium ion cells and methods are provided for preventing lithium metallization in lithium ion batteries to enhance their safety. Electrolytes comprise up to 20% ionic liquid additives which form a mobile solid electrolyte interface during charging of the cell and prevent lithium metallization and electrolyte decomposition on the anode while maintaining the lithium ion mobility at a level which enables fast charging of the batteries. Anodes are typically metalloid-based, for example include silicon, germanium, tin and/or aluminum. A surface layer on the anode bonds, at least some of the ionic liquid additive to form an immobilized layer that provides further protection at the interface between the anode and the electrolyte, prevents metallization of lithium on the former and decomposition of the latter.