SLURRY FOR LITHIUM ION SECONDARY BATTERY POSITIVE ELECTRODES

摘要

To provide a slurry for positive electrodes having excellent weight accuracy at the time of application, which enables the production of a lithium ion secondary battery that has high capacity and excellent cycle characteristics at high potentials, said lithium ion secondary battery being flexible and free from the occurrence of cracks in an active material layer when bent.;[Solution] A slurry for lithium ion secondary battery positive electrodes according to the present invention contains a positive electrode active material, a binder, a conductive material and an organic solvent. The binder contains a nitrile group-containing acrylic polymer and a fluorine-containing polymer; and the viscosity ratio ((viscosity at a shear rate of 2 sec−1)/(viscosity at a shear rate of 20 sec−1)) of this slurry as measured by a coaxial double cylinder viscometer is 1.0-2.5.

主权项

1. A slurry for a lithium ion secondary battery positive electrode comprising a positive electrode active material, a binder, a conductive material, and an organic solvent, wherein
said binder comprises a nitrile group containing acrylic polymer and a fluorine containing polymer, a ratio of a viscosity measured by a coaxial cylinder type viscometer ((the viscosity at a shear speed of 2 sec−1)/(the viscosity at the shear speed of 20 sec−1)) is 1.0 to 2.5.