METHOD FOR THE MANUFACTURE OF COMPOSITE SEPARATORS

摘要

The present invention pertains to a process for the manufacture of a composite separator for an electrochemical cell, said process comprising the following steps: (i) providing a substrate layer; (ii) providing a coating composition comprising: —an aqueous latex comprising at least one vinylidene fluoride (VdF) polymer [polymer (F)] under the form of primary particles having an average primary particle size of less than 1 μm, as measured according to ISO 13321, and —at least one non-electroactive inorganic filler material; (iii) applying said coating composition onto at least one surface of said substrate layer to provide a coating composition layer; and (iv) drying said coating composition layer at a temperature of at least 60° C., preferably of at least 100° C., more preferably of at least 180° C. to provide said composite separator. The present invention also pertains to a coating composition suitable for use in said process, to the composite separator obtained from said process and to an electrochemical cell comprising said composite separator.

主权项

1. A process for the manufacture of a composite separator for an electrochemical cell, said process comprising:
applying a coating composition onto at least one surface of a substrate layer to provide a coating composition layer, the coating composition comprising:
an aqueous latex comprising at least one vinylidene fluoride polymer (F) under the form of primary particles having an average primary particle size of less than 1 μm, as measured according to ISO 13321, andat least one non-electroactive inorganic filler material; and drying said coating composition layer at a temperature of at least 60° C. to provide said composite separator.