Graphene oxide as a sulfur immobilizer in high performance lithium/sulfur cells
A battery is described. The battery is composed of a graphene oxide-sulfur (GO-S) nanocomposite cathode, a separator, an anode, and an electrolyte.
1. A battery comprising:
a graphene oxide-sulfur (GO-S) nanocomposite cathode;
a separator;
an anode; and
an electrolyte.
2. The battery of claim 1 , wherein the separator is a porous polypropylene.
3. The battery of claim 1 , wherein the electrolyte is an ionic liquid-based electrolyte.
4. The battery of claim 3 , wherein the electrolyte is a mixture of n-methyl, n-butyl pyrrolidinium bis(trifluoro methane sulfonyl)imide, LiTFSI and PEGDME.
5. The battery of claim 1 , wherein the electrolyte is LiTFSI-PEGDME.
6. The battery of claim 1 , wherein the graphene oxide-sulfur (GO-S) nanocomposite cathode further comprises carbon black, and polyvinylidene difluoride (PVDF).
7. The battery of claim 1 , wherein the graphene oxide-sulfur (GO-S) nanocomposite cathode comprises GO-S nanocomposite, carbon black, and polyvinylidene difluoride (PVDF) at a weight ratio of 70:20:10, respectively.
8. The battery of claim 1 , wherein the cathode further comprises an aluminum substrate.
9. The battery of claim 1 , wherein the GO-S nanocomposite further comprises a plurality of functional groups and S is bonded to carbon atoms.
10. The battery of claim 9 , wherein the plurality of functional groups includes at least one functional group selected from the group consisting of an epoxy bridge, a hydroxyl group, a phenol group, and a carbonyl group.