Plastic crystal electrolyte with a broad potential window

摘要

A solid ionic electrolyte having an organic plastic crystal solvent (e.g. succinonitrile) doped with lithium bioxalato borate salt (LiBOB) may be used in an electrochemical device. Electrochemical devices are disclosed having a cathode, an anode, and a solid ionic electrolyte having a neutral organic plastic crystal solvent doped with LiBOB alone or in combination with another lithium salt. Such devices have a stable electrolyte interface over a broad potential window combined with high energy density delivery capacity and, in one example, the favorable properties of a neutral organic plastic crystal matrix such as succinonitrile.

主权项

1. Electrolyte comprising an organic plastic crystal matrix comprising succinonitrile doped with 0.1-4.5 mol% lithium bioxalato borate salt, the electrolyte providing a window of electrochemical stability of 4.6 V or greater, stabilizing in less than 3 days and having a conductivity of 10−4 S/cm or greater.