Identification and methods of fabrication of novel scalable, economic complex framework material (cfm) based cathodes for lithium-sulfur batteries

Patent metadata

Field	Value
Publication number	US-2023006214-A1
Application number	US-202017781061-A
Country	US
Kind code	A1
Filing date	Dec 14, 2020
Priority date	Dec 13, 2019
Publication date	Jan 5, 2023
Grant date	—

Abstract

The invention relates to complex framework materials (CFMs) for lithium-sulfur batteries. The CFMs include a CFM host and a coating applied to the CFM host, which includes one or more of an electronic conductor, a lithium ion conductor and a functional catalyst. Further, sulfur is infiltrated into the CFM host creating a sulfur-carbon linkage serving as effective anchors for trapping polysulfides. The systems have been tested in coin cells and pouch cells under lean electrolyte conditions of 3-4 μl/mg of electrolyte to sulfur ratios showing promise and feasibility.

First claim

We claim:

1 . A complex framework material structure, comprising:
a complex framework material host, comprising:
a complex framework material; and
a coating applied to the complex framework material comprising one or more layers comprising a component selected from the group consisting of an electronic conductor, a lithium ion conductor and a functional catalyst.

2 . The complex framework material structure of claim 1 , wherein the complex framework material is comprised of a porous carbon matrix.

3 . The complex framework material structure of claim 1 , wherein the complex framework material comprises a carbon material selected from the group consisting of Super P, YP-80F, and mixtures thereof to bind polysulfide via carbon-sulfur linkages.

4 . The complex framework material structure of claim 1 , wherein the coating is a single layer comprising a component selected from the group consisting of an electronic conductor, a lithium ion conductor and a functional catalyst.

5 . The complex framework material structure of claim 1 , wherein the coating is a multi-layer coating and each layer comprises a component selected from the group consisting of an electronic conductor, a lithium ion conductor and a functional catalyst.

6 . The complex framework material structure of claim 1 , wherein sulfur is infiltrated into the complex framework material host.

7 . The complex framework material structure of claim 1 , wherein the complex framework material structure is selected from the group consisting of EC-CFM, LIC-CFM and FC-CFM.

8 . The complex framework material structure of claim 6 , wherein the complex framework material structure is selected from the group consisting of EC-CFM-S, LIC-CFM-S, and FC-CFM-S.

9 . A lithium-sulfur battery comprising a complex framework material structure-based cathode comprising the complex framework material structure of claim 1 .

10 . A method of preparing a complex framework material structure, comprising:
forming a complex framework material host, comprising;
providing a complex framework material;
applying a coating to the complex framework material comprising one or more component selected from the group consisting of an electronic conductor, a lithium ion conductor and a functional catalyst; and
infiltrating the complex framework material host with sulfur.

11 . A pouch cell, comprising:
a complex framework material/sulfur composite cathode, comprising:
a complex framework material host, comprising:
a complex framework material; and
a coating applied to the complex framework material comprising one or more layers comprising a component selected from the group consisting of an electronic conductor, a lithium ion conductor and a functional catalyst; and

sulfur infiltrated into the complex framework material host;
a separator applied to the complex framework material/sulfur composite cathode; and
a lithium anode applied to the separator, wherein, the composite complex framework material/sulfur cathode, the separator and the lithium anode are in a stacked configuration.

12 . The pouch cell of claim 11 , wherein the complex framework material is comprised of a porous carbon matrix.

13 . The pouch cell of claim 11 , wherein the complex framework material comprises a carbon material selected from the group consisting of Super P, YP-80F and mixtures thereof to bind polysulfide via carbon-sulfur linkages.

14 . The pouch cell of claim 11 , wherein the pouch cell comprises a single layer of each of the complex framework material/sulfur cathode and the lithium anode.

15 . The pouch cell of claim 1 , wherein the pouch cell comprises two or more layers of each of the complex framework material/sulfur cathode and the lithium anode.

Assignees

• Univ Pittsburgh Commonwealth Sys Higher Education

Inventors

• Kumta Prashant N
• Talakonda Prasada Rao
• Datta Moni Kanchan
• Velikokhatnyi Oleg
• Shanthi Pavithra Murugavel
• Kuruba Ramalinga

Classifications

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• H01M4/5815

  Sulfides · CPC title

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M2300/0025

  Organic electrolyte · CPC title