COMPOSITE SEPARATOR AND ELECTROLYTE FOR SOLID STATE BATTERIES

摘要

Separator and electrolyte composites are disclosed. The composites include a porous self-supporting separator film between or adjacent one or two electrolyte films. The electrolyte films may contain a glyme or mixture of glymes, LiX salt and complexing agent, such as PEO. The porous self-supporting separator film may be used dry or wetted with a liquid electrolyte composition. Solid state batteries using the described separator and electrolyte composites in combination with an anode and a cathode are also disclosed.

主权项

1. A composite separator and electrolyte for an electrochemical cell comprising:
a porous self-supporting separator film, the porous self-supporting film having a first major surface and a second major surface; at least one electrolyte film contacting the first major surface of the porous self-supporting film, the at least one electrolyte film comprising from 0 to 80 weight percent of a glyme or mixture of glymes and a lithium salt in an amount of from 20 to 85 weight percent, each weight percent based on the total weight of the glyme and lithium salt combined, and a polymeric complexing agent present in an amount of from 5 to 80 percent by weight, based on the total weight of the electrolyte composition.