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US 2015/0318590 A1Published application
Non-aqueous electrolyte solutions and lithium/oxygen batteries using the same
OwnerShengshui Zhang, Donald R. Foster +1inventors
InventorsShengshui Zhang, Donald R. Foster, Jeffery A. Read
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Abstract
A lithium/oxygen battery includes a lithium anode, an air cathode, and a non-aqueous electrolyte soaked in a microporous separator membrane, wherein non-aqueous electrolyte comprises a lithium salt with a general molecular formula of LiBF3X (X=F, Cl, or Br, respectively) and a non-aqueous solvent mixture.
Claims21
A non-aqueous electrolyte solution comprising a lithium salt with a general molecular formula of LiBF3X where X is selected from the group consisting of fluorine, chlorine, bromine, or iodine, and a solvent mixture comprised of:
- (a) a first solvent and a second solvent;
- (b) wherein said first solvent is selected from the group consisting of ethylene carbonate, propylene carbonate, gamma-butyrlactone, N-methyl pyrrolidinone, tetramethylene sulfone, triethylene glycol dimethyl ether, tetraethylene glycol, dimethyl ether, and mixtures thereof
- (c) further wherein said first solvent has a dielectric constant of from about thirty (30) to about ninety (90), a boiling point of from about two hundred (200) to about two hundred eighty (280) degrees Celsius, and a viscosity of from about 1.5 to about 3.0 centipoises at about twenty-five (25) degrees Celsius;
- (d) wherein said second solvent comprises cyclic ethers, linear ethers having a molecular formula of CmH2m+1OCnH2n+1 wherein m and n are independently from 1 to 4, linear carbonates having a molecular formula of CxH2x+1OC(O)OCyH2y+1 wherein x and y are independently from 1 to 4, or mixtures of the three thereof;
- (e) further wherein said second solvent has viscosity of from about 0.3 to about 0.8 centipoises at twenty-five (25) degrees Celsius, a boiling point of from about forty (40) to about ninety (90) degrees Celsius, and a dielectric constant of from about 2 to about ten (10);
- (f) wherein the ratio of the first solvent in said solvent mixture varies from about 10 percent to about 90 percent by volume;
- (g) wherein the ratio of the second solvent in said solvent mixture varies from about 10 percent to about 90 percent by volume;
- and
- (h) wherein the concentration of said lithium salt is from about 0.1 molal to about 1.5 molal.
6 more elements
A metal/oxygen battery comprising:
- (a) a lithium anode;
- (b) an air cathode;
- (c) a non-aqueous electrolyte solution wherein a lithium salt is selected from the group consisting of fluorine, chlorine, bromine and iodine and wherein the concentration of said lithium salt is from about 0.1 molal to about 1.5 molal;
- (d) further wherein said non-aqueous electrolyte solution comprises a first solvent comprising an ethylene carbonate and dimethyl ether mixture having a dielectric constant of wherein said first solvent is comprised of an ethylene carbonate and dimethyl ether mixture having a dielectric constant of from about thirty (30) to about 90, a boiling point of from about two hundred (200) to about two hundred eighty (280) degrees Celsius, and a viscosity of from about 1.5 to about 3.0 centipoises at about twenty-five (25) degrees Celsius;
- (e) wherein a second solvent is comprised of cyclic ethers, linear ethers having a molecular formula of CmH2m+1OCnH2n+1 wherein m and n are independently from 1 to 4;
- and
- (f) further wherein said second solvent has viscosity of from about 0.3 to about 0.8 centipoises at twenty-five (25) degrees Celsius, a boiling point of from about forty (40) to about ninety (90) degrees Celsius, and a dielectric constant of from about 2 to about ten (10).
4 more elements
Dependencies are inferred from the claim text.