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US 2022/0029241 A1Published application
Printing nanoporous ultrathin membranes for lithium-sulfur batteries
AssigneeRensselaer Polytechnic Institute
InventorsMiao Yu, Fanglei Zhou, Feng Zhao, Jinyun Liao
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Abstract
A method of making a composite membrane for a lithium-sulfur (Li—S) battery is described. The method includes providing a polymeric separator membrane; synthesizing a graphene oxide (GO) dispersion; and printing the GO dispersion onto at least one surface of the polymeric separator membrane. The GO coating includes a GO layer.
Claims20
A graphene oxide (GO) coating for a separator membrane of a lithium-sulfur (Li—S) battery, the GO coating comprising:
- a GO layer comprising a GO dispersion comprising a type of GO, the type of GO selected from the group comprising:
- Type I GO corresponding to original GO prepared by a modified Hummers method, Type I GO functionalized with a carboxyl group (COOH), Type II GO corresponding to GO with enlarged structural defects etched by a nitric acid (HNO3) oxidation, and Type III GO with reduced lateral size synthesized by ultra-sonication.
A lithium-sulfur (Li—S) battery comprising:
- a lithium metal anode;
- a polysulfide cathode;
- and
- a composite membrane positioned between the lithium metal anode and the polysulfide cathode, the composite membrane comprising a polymeric separator membrane and at least one graphene oxide (GO) coating layer on the polymeric separator membrane, the GO coating layer formed by printing a GO dispersion on the polymeric separator membrane.
1 more element
A method of making a composite membrane for a lithium-sulfur (Li—S) battery, the method comprising:
- providing a polymeric separator membrane;
- synthesizing a graphene oxide (GO) dispersion;
- and
- printing the GO dispersion onto at least one surface of the polymeric separator membrane to form a GO coating, the GO coating comprising a GO layer.
1 more element
Dependencies are inferred from the claim text.