SEPARATOR FOR ELECTROCHEMICAL ELEMENT AND METHOD FOR PRODUCING SAME, AND ELECTROCHEMICAL ELEMENT

摘要

A method for producing a separator for an electrochemical element according to the present invention is characterized by comprising: a step of preparing a composition for separator production purposes which comprises a resin raw material comprising a monomer or an oligomer, a solvent (a) for dissolving the resin raw material and a solvent (b) for agglutinating the resin raw material by means of solvent shock, wherein the ratio of the volume (Vsb) of the solvent (b) to the volume (Vsa) of the solvent (a) (i.e., Vsb/Vsa) is 0.04 to 0.2; a step of applying the composition onto a base; a step of irradiating a coating film produced in the aforementioned step with an energy ray to form a resin (A) having a crosslinked structure; and a step of drying the coating film that has been converted into the resin (A) to form pores in the coating film. A separator for an electrochemical element according to the present invention is produced by the production method according to the present invention. An electrochemical element according to the present invention is equipped with the separator for an electrochemical element according to the present invention. Thus, an electrochemical element having excellent reliability, a separator which can constitute the electrochemical element, and a method for producing the separator are provided.