METHOD FOR DRYING SEPARATOR FOR NON-AQUEOUS ELECTRIC STORAGE DEVICE AND METHOD FOR MANUFACTURING ELECTRIC STORAGE APPARATUS

摘要

In a method for drying a separator for a non-aqueous electric storage device including an organic material that thermally shrinks at a thermal shrinkage start temperature of 100° C. or lower, a solvent impregnation and a drying are executed in this order; the solvent impregnation includes bringing the separator into contact with a solvent that has affinity for water and that causes the azeotropic phenomenon at a temperature lower than the boiling point of water so as to lower an azeotropic temperature of a mixture of moisture in the separator and the solvent below a temperature at which the separator starts thermal shrinkage, and the drying includes drying the separator brought into contact with the solvent at a temperature lower than a temperature at which the separator starts thermal shrinkage and higher than the azeotropic point.

主权项

1. A method for drying a separator for a non-aqueous electric storage device, the method comprising:
impregnating a separator with a solvent by bringing the separator into contact with the solvent that has affinity for water and that causes an azeotropic phenomenon at a temperature lower than a boiling point of water so as to mix moisture in the separator with the solvent to produce an azeotropic mixture with an azeotropic point lower than a thermal shrinkage start temperature that is a temperature at which the separator starts thermal shrinkage on heating; and drying the separator brought into contact with the solvent, wherein the separator for a non-aqueous electric storage device includes an organic material with a thermal shrinkage start temperature of 100° C. or lower, and the solvent impregnation and the drying are executed in this order.