abstract |
A composition with an excellent cycle capacity retention rate at high temperatures is provided. n According to the present invention, a composition comprising a graft copolymer, wherein the graft copolymer has a stem polymer and a plurality of branch polymers, the stem polymer has a polyvinyl alcohol structure, each of a first monomer unit and a second monomer unit is included in at least one of the plurality of branch polymers, the second monomer unit is different from the first monomer unit, a glass transition temperature of the composition is 260K to 365K is provided. |