BINDER FOR ELECTRODE OF ELECTROCHEMICAL ELEMENT, COMPOSITION FOR ELECTRODE OF ELECTROCHEMICAL ELEMENT, ELECTRODE OF ELECTROCHEMICAL ELEMENT, AND ELECTROCHEMICAL ELEMENT

The invention relates to a binder for an electrode of an electrochemical element. The binder is a polymer having an N-vinyl formamide unit, which suppresses the decline of battery performances due to deterioration of binding property and increase of internal resistance of the battery and improves the battery performance.