Preparation method and application of low-defect Prussian blue material

• Main Authors: CHEN HANGDA, CHE HAIYING, JIANG HUAILING
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2023
• Subjects: AMMONIA; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; CYANOGEN; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a preparation method and application of a low-defect Prussian blue material, and belongs to the technical field of sodium-ion battery positive electrode materials, and the preparation method is characterized by comprising the following steps: (1) a solution A: dissolving transition metal salt, sodium salt, a complexing agent and a reducing agent in deionized water at 70-100 DEG C, controlling the concentration of the transition metal salt to be 0.5-1 M, keeping the temperature of the solution for 1-10 hours, and filtering to obtain a solution B; a milky colloidal suspension is formed, namely a salting-out phenomenon occurs; (2) preparing a solution B: dissolving sodium ferrocyanide in deionized water, and heating the solution to 50-100 DEG C under the nitrogen protection condition; and (3) under the nitrogen protection condition, slowly adding the solution A into the solution B, and reacting to prepare the low-defect Prussian blue material. According to the invention, lattice water, in