| abstract |
An object of the present invention is to provide a composition for an electrochemical device functional layer capable of providing an electrochemical device with little volume expansion. The composition for an electrochemical device functional layer of the present invention is a composition for an electrochemical device functional layer comprising a polymer and a solvent having an oxide structure-containing monomer unit, wherein the oxide structure-containing monomer unit is represented by the following formula (I) (wherein R 1 Represents an alkylene group which may have a substituent, and n is a positive integer.) Has a structure represented by, and the number average molecular weight of the polymer is 5000 or more and 15000 or less. |