Abstract
In the present study, the methods for evaluating the dispersion of positive electrode materials for Lithium ion secondary battery were examined and the operations of wet dispersion were conducted to prepare the plate which is superior in electrical resistance. First, particle size distribution and viscosity of pastes were measured. Subsequently, the coated film was prepared on the plate using the pastes and glossiness and electrical resistance of the plate were measured.
It was reconfirmed in the study that the dispersion of positive electrode materials could be evaluated by measuring glossiness and electrical resistance of coated film on the plate. It was also pointed out that glossiness and electrical resistance could be inferred by particle diameter, D10.
Glossiness and density of coated film showed large values by high-dispersing the paste of positive electrode materials for that to have small particle size. That meant that the plate could be prepared which is superior in electrical resistance.
The preparation of pastes is extremely important to pack tightly particles for positive electrode on the plate. It was implied that the wet dispersion of particles for positive electrode determined battery characteristics.
