High-performance negative electrode material for lithium battery based on phase change induced size effect and application of high-performance negative electrode material

The invention relates to a high-performance negative electrode material for a lithium battery based on a phase change induced size effect and application, the negative electrode material is characterized in that MS2 is uniformly and completely coated with amorphous Al2O3, the Al2O3 layer is gradually differentiated and broken into fine nanoclusters along with charge-discharge circulation through the bonding characteristic and strong binding force between the M-Al2O3, and the fine nanoclusters enter the crystal lattice dot matrix of the MS2, so that the MS2 is uniformly and completely coated with the amorphous Al2O3. The Al2O3 nanoclusters which are dispersedly distributed in the dot matrix generate the effect of a growth inhibitor, that is, the Al2O3 nanoclusters are dispersedly and randomly arranged in the MS2 active material layer with a certain thickness to be assembled into a grid type frame structure, and disordered growth of M and MS2 nanoparticles is inhibited in three dimensions of space, so that the