本发明涉及新材料领域，旨在提供一种高导热二维高熵金属氧化物组装体及其制备方法。该高导热二维高熵金属氧化物组装体的分子式为(Co0 .3La0 .6Er0 .6Y0 .7Mn0 .4Ga0 .4)O4；外观呈短纤维状，单根短纤维的长径比为5～7，其横截面呈正三角形，正三角形的边长为100～300nm。本发明利用高熵氧化物在垂直于纳米片平面方向的有序组装，实现金属氧化物组装体的一维高导热特性。同时，该组装体在制备过程中形成二维平面方向上的异质元素均匀分布，相比于现有高熵氧化物材料具有更好的导热特性。

The present invention relates to the field of new materials and aims to provide a high thermal conductivity two-dimensional high entropy metal oxide assembly and a preparation method thereof. The molecular formula of the high thermal conductivity two-dimensional high entropy metal oxide assembly is (Co0.3La0.6Er0.6Y0.7Mn0.4Ga0.4) O4; The appearance is in the shape of a short fiber, with a length to diameter ratio of 5-7 for a single short fiber. Its cross-sectional area is an equilateral triangle, with a side length of 100-300nm. The present invention utilizes ordered assembly of high entropy oxides perpendicular to the plane of the nanosheet to achieve one-dimensional high thermal conductivity of metal oxide assemblies. At the same time, the assembly forms a uniform distribution of heterogeneous elements in a two-dimensional plane during the preparation process, which has better thermal conductivity compared to existing high entropy oxide materials.