Sodium iron sulfate prepared by carbon thermal shock and a method for preparing the same

Abstract

The application discloses sodium iron sulfate prepared by carbon thermal shock and a preparation method thereof, and the method comprises the following steps: (1) uniformly mixing a sodium source, an iron source, a sulfuric acid source and inorganic carbon, and ball milling to obtain a precursor; (2) placing the precursor in a joule heating device in an inert atmosphere, and performing joule heating calcination to obtain carbon-coated sodium iron sulfate. The application adopts the joule heating device to rapidly heat and calcine the precursor powder through carbon thermal shock, realizes uniform coating of the carbon material, inhibits the agglomeration of particles, hinders the further growth of the crystal in the calcination process in a short time, and plays a role in refining the crystal grains. The carbon-coated sodium iron sulfate prepared by the method is fine and uniform, has high conductivity, improves the contact area of the active material pre-electrolyte, shortens the diffusion path of sodium ions, greatly improves the electrochemical performance of the material, and has a high commercial application prospect.

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