Sodium ferric sulfate composite positive electrode material and preparation method thereof

• Main Authors: YANG HAODONG, CHEN RUIYONG, ZHOU QUAN, WANG JINGRAN, ZHANG DONGYAN, DENG CHUJIAN
• Format: Patent
• Language: Chinese; English
• Published: 14.06.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a sodium ferric sulfate composite positive electrode material and a preparation method thereof, and the preparation method comprises the following steps: respectively preparing a ferrous sulfate solution and a sodium sulfate solution, mixing the two solutions, controlling the reaction of ferrous sulfate and sodium sulfate in the precipitation process through low-temperature evaporation, and collecting a solid material to obtain the sodium ferric sulfate composite positive electrode material. The preparation method comprises the following steps: preparing a solid material, removing surface water and crystal water of the solid material to obtain a treated raw material, adding a conductive carbon material into the treated material, fully mixing, grinding and crushing to obtain a sodium ferric sulfate composite material precursor, and carrying out vacuum sintering on the sodium ferric sulfate composite material precursor to obtain the sodium ferric sulfate composite positive electrode mater