Patent ID: 8790419
Filing Date: 2014-07-29
Classification: H01M,Y02E,Y10T

Abstract:
1. A method of manufacturing a cell separator, the method comprising: providing a water-repellent porous synthetic resin film or membrane having a large number of fine pores with a pore diameter of 1 μm or less; preparing a water-based paste comprising wherein a solids content comprising the granular ceramic and the binder in the paste is adjusted to 44% by mass to 52% by mass, and the ratio of the alcohol contained in the aqueous solvent is adjusted to 11% by mass to 36% by mass; coating the paste onto a surface of the synthetic resin film membrane; forming a protective layer mainly composed to the granular ceramic with a solids content of at least 55% by mass on the surface of the synthetic resin film or membrane by eliminating the alcohol from the paste on the surface; and drying the protective layer mainly composed of the granular ceramic on the surface.