Silicon-carbon negative electrode material slurry and preparation method thereof

• Main Authors: FAN RUIJUAN, TIAN ZHANYUAN, CAO GUOLIN, SHAO LE, SHEN XIAOHUI
• Format: Patent
• Language: Chinese; English
• Published: 28.02.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides silicon-carbon negative electrode material slurry and a preparation method thereof. The method comprises steps of 1) dividing CMC glue solution into two parts, and mixing a first part of the CMC glue solution with conductive agent and a silicon carbon material to obtain slurry 1; 2) adding a graphite material into the slurry 1, and dispersing the material to obtain slurry 2;3) adding a second part of CMC glue solution and the water into the slurry 2, vacuumizing, and dispersing the material to obtain slurry 3; and 4) adding SBR binder into the slurry 3, dispersing, sieving the slurry, and discharging bubbles to obtain silicon-carbon negative electrode material slurry. The method is advantaged in that the agglomeration phenomenon of the silicon-carbon particles in the pulping process is eliminated, that the graphite material uniformly wraps the silicon-carbon particles is guaranteed, and the overall cycle life of a battery is improved. 本发明提供一种硅碳负极材料浆料及其制备方法，包括以下步骤：1)将CMC胶液分成两份，将第一份CMC胶液及