COATED SEPARATOR, ELECTROCHEMICAL CELL COMPRISING A COATED SEPARATOR, AND METHOD OF MAKING A COATED SEPARATOR

摘要

A coated separator includes a porous separator base material including a porous polymer film; a first coating layer including electrochemically stable thermoplastic polymer particles disposed on a first surface of the porous separator base material, wherein the electrochemically stable thermoplastic polymer particles have a melting temperature of 90 to 135°C; and a second coating layer including ceramic particles having an average particle size of greater than 100 nanometers; wherein the second coating layer is disposed on the first coating layer on a side opposite the porous separator base material; or the second coating layer is disposed on the porous separator base material on a second side opposite first coating layer; or the first coating layer and the second coating layer are combined to form an intermixed coating layer disposed on the first surface of the porous separator base material. Electrochemical cells, a device including an electrochemical cell, and a method of making the coated separator are also described.