Preparation method of silicate composite positive electrode material

• Main Authors: Wang Wencong, Li Liang, Ni Jiangfeng
• Format: Patent
• Language: Chinese; English
• Published: 31.08.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a preparation method of a silicate composite positive electrode material. According to the preparation method, firstly, a conducting agent is soaked in concentrated nitric acid; the stirring is performed at 80 to 150 DEG C; the treated conducting agent is obtained; the treated conducting agent is dispersed into an organic solvent to obtain a dispersing solution; then, the dispersing solution is heated to 120 to 180 DEG C; then, a water solution containing an iron source is added for reaction to obtain a precursor; the obtained precursor, lithium sources and silicon sources are added into water and are mixed; then an organic acid complexing agent is added; stirring is carried out until the gel is formed; the obtained gel is dried and ground; then, sintering is performed under the gas protection condition at 500 to 900 DEG C; cooling and grinding are performed to obtain the silicate composite positive electrode material. The silicate composite positive electrode material provided by the