The invention discloses a modified
prussian blue material, a
sodium ion battery positive
electrode plate and a preparation method. The preparation method for the modified
prussian blue material at least comprises the steps of performing a reaction on
methyl orange,
ferric chloride and
pyrrole based on a certain proportion to obtain a solution, then performing a reaction on the obtained solution with a
mixed solution of
sodium ferrocyanide and inorganic acid, and next, performing
processing of centrifuging, washing,
drying and the like to obtain the modified
prussian blue material. Compared with the conventional synthesis method, the prepared modified prussian blue material is lower in
crystal water content, less in defects, high in tubular
polypyrrole conductivity and relatively high in environment stability, so that an
electrolyte can permeate rapidly, and rapid
diffusion of Na+ can be promoted to form a three-dimensional conductive network with prussian blue nanoparticles; therefore, the material
conductivity is improved, and the material is novel and unique; in addition, the
cycling performance and the rate capability of the material are greatly improved; and the modified prussian blue material is more suitable for application of an
energy storage material, such as the positive
electrode material of the
sodium ion battery.