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US 2017/0288265 A1Published application
High voltage solid electrolyte compositions
AssigneeWildcat Discovery Technologies, Inc.
InventorsBin Li, Marissa Caldwell
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Abstract
An electrochemical cell having an anode, a solid electrolyte, and a cathode. The solid electrolyte includes a polymer gel formed from an ethylene oxide polymer combined with a liquid precursor. The liquid precursor contains at least 15 molar percent of a lithium salt in a solvent.
Claims20
An electrochemical cell, comprising:
- an anode;
- a cathode comprising an electrode active material;
- and
- a solid electrolyte film layer comprising:
- (i) a polymer gel, wherein the polymer gel comprises an ethylene oxide polymer portion;
- (ii) a liquid portion, wherein the liquid portion comprises a solvent;
- and (iii) at least 6 weight percent of a lithium salt;
- wherein the electrolyte is electrochemically stable at voltages greater than about 4.4 V.
5 more elements
A method of making an electrolyte, comprising:
- forming a liquid precursor by suspending at least 20 molar percent of a lithium salt in a liquid solvent;
- combining an ethylene oxide polymer and the liquid precursor to form a gel;
- and
- annealing the gel.
1 more element
Dependencies are inferred from the claim text.