Graphene oxide as a sulfur immobilizer in high performance lithium/sulfur cells

Patent metadata

Field	Value
Publication number	US-10044031-B2
Application number	US-201715817051-A
Country	US
Kind code	B2
Filing date	Nov 17, 2017
Priority date	Sep 30, 2011
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A battery is described. The battery is composed of a graphene oxide-sulfur (GO-S) nanocomposite cathode, a separator, an anode, and an electrolyte.

First claim

What is claimed is:

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.

Assignees

• Univ California

Inventors

• Zhang Yuegang
• Cairns Elton J
• Ji Liwen
• Rao Mumin

Classifications

• H01M50/417

  Polyolefins · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2004/04

  obtained by TEM, STEM, STM or AFM · CPC title

• C07D303/38

  with hydrocarbon radicals, substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals · CPC title

• C01B32/70 Primary

  Compounds containing carbon and sulfur, e.g. thiophosgene · CPC title