| abstract |
The invention relates to a self-supporting transition metal phosphide/carbon composite film, a preparation method and application thereof, and a battery, comprising the following steps: (1) dissolving a transition metal compound and a carboxylate in a polyhydric alcohol, and after stirring uniformly, Heating and refluxing, and then cooling to obtain a transition metal alkoxide precursor; (2) after washing the obtained transition metal alkoxide precursor with an organic solvent, uniformly dispersing it in the organic solvent to form a precursor dispersion, and then Carry out organic solvent evaporation treatment, and self-assemble in the process of organic solvent evaporation to obtain a self-supporting transition metal alkoxide precursor film; (3) put the precursor film and the phosphorus source into two containers respectively, under a protective gas atmosphere Heating and decomposing simultaneously with phosphating, and finally in-situ transformation to obtain a self-supporting transition metal phosphide/carbon composite film, which can be directly used as an electrode sheet in lithium-ion batteries or sodium-ion batteries. |