Composite separator and electrolyte for electrochemical cells
AssigneeMedtronic, Inc.
InventorsHui Ye, Timothy T. Bomstad, Parthasarathy M. Gomadam, Gaurav Jain, Christian S. Nielsen, Prabhakar A. Tamirisa, Collette M. Vanelzen
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Abstract
Separator and electrolyte 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 and electrochemical cells are disclosed that include the described separator and electrolyte composites in combination with an anode and a cathode.
Claims20
An electrochemical cell comprising:
- a first electrolyte complex comprising:
- a glyme in an amount of 18 to 54 weight percent based on total weight of glyme and lithium salt;
- a lithium salt in an amount of 46 to 82 weight percent based on total weight of glyme and lithium salt, and
- a polymeric complexing agent in an amount of 5 to 50 percent by weight of combined glyme, lithium salt, and polymeric complexing agent;
- an anode;
- a cathode;
- a separator film having a first major surface and a second major surface;
- and
- an electrolyte film contacting the first major surface of the separator film, the electrolyte film comprising the first electrolyte complex.
Dependencies are inferred from the claim text.