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US 8,475,688 B2Granted
Lithium batteries using poly(ethylene oxide)-based non-aqueous electrolytes
AssigneeUchicago Argonne, LLC
InventorsZonghai Chen, Khalil Amine
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Abstract
Lithium-air cells using poly(ethyleneoxide) (PEO) siloxane-based or poly(ethyleneoxide) phosphate-based electrolytes may be prepared and exhibit improved charge carrying capacity. Such PEO silioxanes and phosphates generally have the formulas Ia, Ib, Ic, Id, IIa, IIb, IIc, where:
Claims17
A lithium-air cell comprising:
- a negative electrode;
- an air positive electrode;
- and
- a non-aqueous electrolyte comprising:
- a lithium salt;
- and
- a poly(ethyleneoxide) solvent that is a compound of Formula Ia, Ib, Ic, Id, or a mixture of any two or more thereof:
- R1, R2, and R3 are independently H, a substituted or unsubstituted alkyl group having from 1 to 12 carbon atoms, a substituted or unsubstituted alkenyl group having from 2 to 12 carbon atoms, or a group of Formula IIIa, IIIb, IIIc, or IIId;
- R4, R5, and R6 are independently H, a substituted or unsubstituted alkyl group having from 1 to 12 carbon atoms, or a substituted or unsubstituted alkenyl group having from 2 to 12 carbon atoms;
- and
- PEO1, PEO2, PEO3, PEO4, PEO5, PEO6, and PEO7 are independently a poly(ethyleneoxide) group.
8 more elements
Dependencies are inferred from the claim text.