Two-dimensional high-entropy metal oxide assembly with high thermal conductivity and preparation method thereof

Patent metadata

Field	Value
Publication number	US-12410066-B2
Application number	US-202217667559-A
Country	US
Kind code	B2
Filing date	Feb 9, 2022
Priority date	Feb 1, 2021
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

The present disclosure relates to the field of new materials, and aims at providing a two-dimensional high-entropy metal oxide assembly with high thermal conductivity and a preparation method thereof. The two-dimensional high-entropy metal oxide assembly with the high thermal conductivity has a molecular formula of (Co 0.3 La 0.6 Er 0.6 Y 0.7 Mn 0.4 Ga 0.4 )O 4 . The two-dimensional high-entropy metal oxide assembly with the high thermal conductivity is in a short fiber shape with a length-diameter ratio of the short fiber of 5 to 7 and has a cross section of a regular triangle with the side length of the regular triangle of 100 to 300 nm. The present disclosure achieves one-dimensional high thermal conductivity of metal oxide assembly by means of orderly assembling of high-entropy oxide in the direction perpendicular to nanosheets. Meanwhile, the assembly enables uniform distribution of heterogeneous elements in the two-dimensional plane during the preparation process.

First claim

The invention claimed is:

1. A two-dimensional high-entropy metal oxide assembly with high thermal conductivity, wherein the metal oxide assembly has a molecular formula of (Co0.3La0.6Er0.6Y0.7Mn0.4Ga0.4)O, is in a short fiber shape with a length-diameter ratio of the short fiber of 5 to 7, and has a cross section of a regular triangle with a side length of the regular triangle of 100 to 300 nm.

2. A method to prepare the two-dimensional high-entropy metal oxide assembly with high thermal conductivity according to claim 1 , comprising the following steps:
(1) taking Co(NO 3 ) 2 , La(NO 3 ) 3 , Er(NO 3 ) 3 , Y(NO 3 ) 3 , MnCl 2 and GaCl 3 as solutes at a molar ratio of 0.3:0.6:0.6:0.7:0.4:0.4, taking methanol, anhydrous ethanol, isopropanol and n-butanol at a molar ratio of 0.3:3:0.5:0.1 to uniformly mix them into a solvent, adding the solutes to the solvent with a ratio of a total mass of the solutes to a mass of the solvent being 17.6%, and stirring the mixture for 20 to 40 min to obtain a first mixed liquid for standby application;
(2) taking p-phenol, 1,3-cyclohexanedione, furoin and inositol as solutes at a molar ratio of 0.1 to 0.3:0.7 to 0.9:2.5 to 3.5:0.012 to 0.014 and adding them to n-propanol with a ratio of a total mass of the solutes to a mass of the n-propanol being 6.5%, and stirring the mixture for 3 to 5 h to obtain a second mixed liquid for standby application;
(3) taking the first mixed liquid and the second mixed liquid at a molar ratio of 3 to 5:11 to 13, cooling them to 0° C., mixing them in an environment where ultraviolet light is completely shielded, continuously stirring the mixture for 5 to 15 min, and keeping the mixture still, standing at 0° C. for 10 to 12 h in an environment where ultraviolet light is completely shielded to obtain a third mixed liquid;
(4) pouring the third mixed liquid into a culture dish until a height of a liquid level is 10 mm, heating the third mixed liquid to 20° C., and irradiating the third mixed liquid with the ultraviolet light having a wavelength of 100 nm to 300 nm for 3 to 5 h to obtain a fourth mixed liquid;
(5) placing the fourth mixed liquid into a sealed container, performing alternating pulse on the solution with a magnetic field and microwaves to obtain a fifth mixed liquid; and
(6) freezing and drying the fifth mixed liquid, washing the frozen and dried fifth mixed liquid with deionized water and acetone 7 times separately, and drying the fifth mixed liquid to obtain the two-dimensional high-entropy metal oxide assembly with high thermal conductivity.

3. The method according to claim 2 , wherein in the step (4), a wavelength of the ultraviolet light is 100 nm to 300 nm.

4. The method according to claim 2 , wherein in the step (5), a time interval of magnetic pulse and microwave pulse is 1 min, the magnetic field pulse lasts for 2 to 4 s, and the microwave pulse lasts for 7 to 9 s; wherein the magnetic pulse is performed 5 times in total, and the microwave pulse is performed 5 times in total; and wherein a magnetic field intensity is 0.75 to 0.85 Tesla (T), and a microwave power is 700 W to 900 W.

Assignees

• Univ Zhejiang

Inventors

• Zhang Lingjie
• Cai Weiwei
• Bao Ningzhong

Classifications

• C01P2006/32

  Thermal properties · CPC title

• C01P2002/52

  containing elements as dopants · CPC title

• C01P2004/10

  extending in one dimension, e.g. needle-like · CPC title

• C01G51/70 Primary

  containing rare earths, e.g. LaCoO3  (C01G51/68 takes precedence) · CPC title