A stannic phosphide-based negative electrode material, a preparation method and application thereof

Abstract

The application relates to the technical field of battery negative electrode materials, and discloses a tin phosphide-based negative electrode material and a preparation method and application thereof. x heterostructure and a graphene material, wherein the graphene material uniformly coats the Sn4P3 / MP x heterostructure; the M is iron, manganese or copper, and x is 1-2. The preparation method comprises the following steps: high-energy ball milling a mixture of metal powder and a phosphorus source in an inert atmosphere to obtain a metal phosphide; high-energy ball milling a mixture of the metal phosphide, tin powder and phosphorus powder in an inert atmosphere to obtain a heterostructure; uniformly mixing the heterostructure and a carbon source in an inert atmosphere, and high-energy ball milling in an inert atmosphere to obtain a tin phosphide-based negative electrode material. The tin phosphide-based negative electrode material has excellent structural stability in the charging and discharging process, and exhibits high-rate and long-cycle sodium storage performance.

Images