| abstract |
To provide a binder for an electrochemical device capable of improving the lifetime characteristics of an electrochemical device by following a volume change of an electrode structure accompanying discharge and discharging. A binder for secondary batteries containing a polymer having at least one cyclic host group in the molecule, wherein the host group is present as a side chain of the polymer, and the main chain of the polymer penetrates at least part of the cyclic host group A binder for an electrochemical device, characterized in that. |