# US 2021/0280847 A1 · Method of infusing sulfur and resulting composition

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- Number: US 2021/0280847 A1
- Document ID: US20210280847A1
- Status: Published application
- Kind: A1
- Application number: 16/809,733
- Filed: 2020-03-05
- Published: 2021-09-09
- Earliest claimed: 2020-03-05
- Assignees: NOHMS Technologies, Inc.
- Applicants: NOHMS Technologies, Inc.
- Inventors: Surya Moganty; Rutvik Vaidya; Xiaojing Zhu; Gabriel Torres
- Web page: https://patentgrep.com/patent/US20210280847A1

## CPC

- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- C08K 3/00: Use of inorganic substances as compounding ingredients
- C08K 3/06: Sulfur
- H01M 4/1397: of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
- H01M 4/364: {as mixtures}
- H01M 4/38: of elements or alloys
- H01M 4/58: of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M 4/5815: {Sulfides}
- H01M 4/587: for inserting or intercalating light metals
- H01M 4/625: {Carbon or graphite}
- H01M 10/052: Li-accumulators
- C08K 3/02: Elements
- C08K 3/04: Carbon
- C08K 3/041: {Carbon nanotubes}
- C08K 3/042: {Graphene or derivatives, e.g. graphene oxides}
- C08K 3/046: {Carbon nanorods, nanowires, nanoplatelets or nanofibres}
- H01M 2004/028: {Positive electrodes}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A method utilizing microwave energy to incorporate sulfur onto carbon, prepare cathode material for lithium sulfur battery applications, and the compositions resulting therefrom is disclosed.

## Claims

### Claim 1

A method of forming a carbon/sulfur composite, comprising:
a) placing a carbon/sulfur mixture into a reactor vessel;
b) placing the reactor vessel in a microwave oven;
c) subjecting the carbon/sulfur mixture to a microwave heat source;
d) raising the temperature of the carbon/sulfur mixture to above the melting point of sulfur; and
e) lowering the temperature of the carbon/sulfur mixture to below the melting point of sulfur, forming a carbon/sulfur composite comprising sulfur condensed onto the carbon.

### Claim 2 (depends on 1)

The method of claim 1, wherein the carbon/sulfur composite is a lithium sulfur battery carbon electrode.

### Claim 3 (depends on 1)

The method of claim 1, wherein the sulfur in the carbon/sulfur mixture is elemental sulfur, sulfide, disulfide or a sulfur-containing compound.

### Claim 4 (depends on 1)

The method of claim 1, wherein the carbon in the carbon/sulfur mixture is a carbon-containing material.

### Claim 5 (depends on 1)

The method of claim 1 wherein the carbon in the carbon/sulfur mixture is carbon black, graphite, carbon fiber, carbon nanotube, fullerene, graphene, graphene oxide, activated carbon, pyrolytic carbon, polymer-derived carbon or combinations thereof.

### Claim 6 (depends on 1)

The method of claim 1, wherein the carbon/sulfur composite comprises sulfur infused into the pores of the carbon.

### Claim 7 (depends on 1)

The method of claim 1, wherein the carbon/sulfur composite comprises sulfur in an amount of from 60 wt. % to 95 wt. %.

### Claim 8 (depends on 1)

The method of claim 1, wherein the carbon/sulfur composite comprises carbon in an amount of from 5 wt. % to 40 wt. %.