| abstract |
The invention discloses a dealloyed sodium ion battery negative electrode material and a preparation method thereof. The sodium ion battery negative electrode material is composed of solid carbon particles and nano-scale metal meshes coated on the surface of the solid carbon particles, or is composed of nano-scale metal particles. The net and the carbon skeleton supported therein are composed, the carbon skeleton is hollow or three-dimensional porous, and the composition of the nano-scale metal net is at least one of Sn, Pb, Bi, Ge or Sb. The combination of metal mesh and carbon material can improve the strength and conductivity of the particles, and the three-dimensional porous or hollow carbon skeleton structure can further improve the specific surface area of the material, which is more conducive to the de-intercalation of sodium ions, and can improve the cycle performance and specific capacity. |