Binder composition for lithium ion secondary battery, slurry composition for lithium ion secondary battery electrode, slurry composition for lithium ion secondary battery porous film, electrode for lithium ion secondary battery, and lithium ion secondary battery

摘要

The present invention addresses the problem of providing a lithium ion secondary battery binder composition that can ensure the stability of a slurry composition and productivity for the production of an electrode while also exhibiting excellent cycling characteristics and high-temperature storage characteristics in a lithium ion secondary battery. Said binder composition includes an ethylenically unsaturated carboxylic acid compound that comprises an ethylenically unsaturated carboxylic acid and/or a salt thereof, and includes a copolymer that is obtained by polymerizing a monomer composition that includes a polyfunctional compound that has a polyoxyalkylene structure and two or more ethylenically unsaturated bonds.