Photothermal energy conversion and thermal energy storage form-stable phase change composite material and preparation method thereof

A photothermal energy conversion and thermal energy storage form-stable phase change composite material, comprising a supporting material and an organic phase change material,

• wherein:
• a mass ratio of the supporting material and the organic phase change material is 3:7 to 1:9;
• the organic phase change material is disposed between adjacent layers of the supporting material to form a layered stacked structure;
• each layer of the supporting material is a nanosheet of Ti2C, Ti3CN, V2C, TiNbC, Nb4C3, (Ti0.5Nb0.5)2C, or (V0.5Cr0.5)3C2, and the nanosheet is single layer or multilayer having a size of a cross section of 1.5 to 2.2 μm;
• and
• the organic phase change material is paraffin, fatty acid, ester of fatty acid, or alcohol compound, and the alcohol compound is selected from lauryl alcohol, tetradecyl alcohol, hexadecanol, octadecanol, polyethylene glycol, and mixtures thereof.