Preparation of metal chalcogenides

Patent metadata

Field	Value
Publication number	US-11919781-B2
Application number	US-202117300772-A
Country	US
Kind code	B2
Filing date	Nov 1, 2021
Priority date	Aug 1, 2017
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

Abstract

A method embodiment involves preparing single metal or mixed transition metal chalcogenide using exfoliation of two or more different bulk transition metal dichalcogenides in a manner to form an intermediate hetero-layered transition metal chalcogenide structure, which can be treated to provide a single-phase transition metal chalcogenide.

First claim

We claim:

1. A transition metal chalcogenide material having an as-ball milled hetero-layered structure having layers of different composition exfoliated from different starting transition metal chalcogenides by ball milling the different starting transition metal chalcogenides together wherein individual layers of the as-ball milled hetero-layered structure are chemically un-modified relative to the different starting transition metal chalcogenides.

2. The material of claim 1 that has been converted to comprise a substantially homogeneous solid solution of two or more different transition metal chalcogenides.

3. The material of claim 1 wherein respective layers have at least one of a different transition metal constituent and a chalcogen constituent from the next adjacent layer.

4. The material of claim 1 where the hetero-layered structure comprises transition metal dichalcogenide layers with different transition metal constituents.

5. The material of claim 1 wherein the hetero-layered structure comprises transition metal trichalcogenide layers having different transition metal constituents.

6. The material of claim 1 wherein the hetero-layered structure comprises transition metal dichalcogenide layers having different chalcogen constituents.

7. The material of claim 1 wherein the hetero-layered structure comprises transition metal trichalcogenide layers having different chalcogen constituents.

8. The material of claim 1 wherein each of the layers includes a transition metal that is selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Mo, W, Re, Pd, Pt, In, Ga and Sn.

9. The material of claim 1 which includes at least one of graphite, black phosphorus, and boron nitride.

10. The material of claim 2 which has been heated to convert the structure to a single-phase structure.

11. The material of claim 1 wherein the layers of the as-ball milled hetero-layered structure are self-assembled by the ball milling.

12. The material of claim 8 having a chemical composition represented by (M a M 2 b M 3 c . . . n )(X d X 2 e X 3 f ), where the formula unit includes two or more different transition metals (M), and X, X 2 and X 3 represent S, Se, or Te, whereby the sum of a+b+c+. . . n is between 1 and 3 and the sum of d+e+f is between 1 and 6.

Assignees

• Univ Iowa State Res Found Inc

Inventors

• Balema Viktor
• Hlova Ihor
• Pecharsky Vitalij K

Classifications

• C01G39/06 Primary

  Sulfides · CPC title

• B02C15/004

  Shape or construction of rollers or balls · CPC title

• B02C19/06

  Jet mills · CPC title

• C01B19/002 Primary

  Compounds containing, besides selenium or tellurium, more than one other element, with -O- and -OH not being considered as anions · CPC title

• C01G41/00

  Compounds of tungsten · CPC title