| abstract |
An object of the present invention is to provide a composition for an electrochemical device functional layer capable of providing an electrochemical device having a small volume expansion. The electrochemical device functional layer composition of the present invention is an electrochemical device functional layer composition comprising a polymer having an oxide structure-containing monomer unit and a solvent, wherein the oxide structure-containing monomer unit is: The polymer has a structure represented by formula (I) (wherein R 1 represents an alkylene group which may have a substituent, and n is a positive integer), and the polymer has a number average molecular weight of 5,000 or more and 15,000 or more. It is the following. [Chemical 1] |