Binder resin for secondary battery electrodes, binder resin composition for secondary battery electrodes using same, slurry for secondary battery electrodes, electrode for secondary batteries, and secondary battery

• Main Authors: OKADA HARUKI, FUJIE FUMIKO, MATSUMOTO AKIKAZU
• Format: Patent
• Language: Chinese; English
• Published: 08.06.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Using a binder resin for secondary battery electrodes, which is a polymer characterized by containing, as monomer units that constitute the polymer, 50-99.99% by mole of a vinyl cyanide monomer unit and 0.01-50% by mole of a monomer unit having a phosphoric acid group and also characterized by preferably having a mass average molecular weight of 200,000 to 3,000,000, enables the achievement of a battery that exhibits the electrochemical stability of the vinyl cyanide monomer unit within the battery, while increasing the flexibility of a collector and exhibiting excellent binding properties ofthe monomer unit having a phosphoric acid group to the collector. 本发明通过使用特征为含有乙烯基氰化物单体单元50～90.99摩尔％和具有磷酸基团的单体单元0.01～50摩尔％作为构成聚合物的单体单元，优选质均分子量为20万～300万的聚合物的二次电池电极用粘结剂树脂，能够得到具有磷酸基团的单体单元发挥对于集流体的优异的粘合性，提高集流体的柔软性，同时发挥乙烯基氰化物单体单元具有的在电池内的电化学稳定性的电池。