Solvents and catalyst preparations for lithium-oxygen batteries
An electrochemical device includes a lithium anode having a red poly(benzonitrile) coating covering at least a portion of the anode; a separator and an air cathode comprising reduced graphene oxide over gas diffusion layer; and an electrolyte comprising an ether solvent, benzonitrile, and a lithium salt.
1. A lithium-oxygen battery comprising:
a lithium anode comprising a red poly(benzonitrile) coating covering at least a portion of the anode;
an air cathode comprising reduced graphene oxide over gas diffusion layer (GDL); and
an electrolyte comprising an ether solvent, benzonitrile, and a lithium salt.
2. The lithium-oxygen battery of claim 1 , wherein the electrolyte comprises about 10 vol % to about 50 vol % benzonitrile.
3. The lithium-oxygen battery of claim 1 , wherein the electrolyte comprises about 20 vol % to about 50 vol % benzonitrile.
4. The lithium-oxygen battery of claim 1 , wherein the electrolyte comprises about 15 vol % to about 40 vol % benzonitrile.
5. The lithium-oxygen battery of claim 1 configured to cycle at a rate of greater than 200 mA/g and a capacity of greater than 200 mAh/g.
6. The lithium-oxygen battery of claim 1 configured to cycle at a rate of about 200 mA/g to about 1000 mA/g and a capacity of about 200 mAh/g to about 3000 mAh/g.
7. The lithium-oxygen battery of claim 1 configured to cycle at a current density from about 50 mA/g to about 1000 mA/g and a capacity of about 500 mAh/g to about 3000 mAh/g.
8. The lithium-oxygen battery of claim 1 configured to cycle at a rate of about 500 mA/g and a capacity of about 500 mAh/g.
9. The lithium-oxygen battery of claim 1 , wherein the lithium salt comprises lithium trifluoromethanesulfonate (lithium triflate), and lithium bis-(trifluoromethanesulfonyl) imide (LiTF SI).
10. The lithium-oxygen battery of claim 1 , wherein the ether solvent comprises tetraethyleneglycoldimethylether (TEGDME), triethyleneglycoldimethylether (TrEGDME), and diethyleneglycoldimethylether (DEGDME).
11. The lithium-oxygen battery of claim 1 , wherein the lithium anode further comprises a coating of Li 2 CO 3 .
12. The lithium-oxygen battery of claim 1 , wherein the air cathode further comprises particles of Ir, Rh, Pt, Pd, Ru, LiIr 3 , LiRh 3 , Li/Pt, and Li/Pd intermetallics.