AGENT FOR FORMING ELECTRODE PROTECTION FILM

摘要

Provided is an agent for forming an electrode protection film which has a high voltage and a high capacity and can increase the high temperature storage properties and the charge/discharge cycle properties of a lithium secondary battery or a lithium ion capacitor; also provided are an electrode and an electrolyte solution including the electrode protection film. The present invention is an agent (B) for forming an electrode protection film, said agent containing a compound (A), which has an alkenyl ether group (X) represented by general formula (1) and a group (L) having at least one kind of atom selected from oxygen, fluorine, silicon, phosphorous, and sulfur, and the compound has an ether group concentration of 0.1-9.0 mEq/g.