BINDER FOR POSITIVE ELECTRODE PLATE AND SYNTHESIS METHOD THEREFOR, POSITIVE ELECTRODE PLATE COMPRISING SAME, SECONDARY BATTERY AND ELECTRIC DEVICE

• Main Authors: XIE, Laiyong, SUN, Chengdong, ZHENG, Yi, YE, Chong
• Format: Patent
• Language: Chinese; English; French
• Published: 18.01.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Provided in the present application are a binder for a positive electrode plate and a synthesis method therefor, a positive electrode plate comprising same, a secondary battery and an electric device. The binder comprises a copolymer formed by comonomers, wherein the comonomers comprise a first monomer, a second monomer, a third monomer, and a fourth monomer, and the molar content of the first monomer is 3 mol% to 10 mol% based on the total molar amount 100 mol% of the comonomers. The binder provided in the present application not only has good flexibility and high cohesiveness, but also has good electrolyte swelling resistance, such that a positive electrode plate is ensured to have a high bonding strength and good processing properties, and a secondary battery is also ensured to maintain a good structural stability during the long-term charging and discharging processes, which further gives full play to the electrochemical properties of the secondary battery. La présente invention concerne un liant pour une