Case for rechargeable battery and rechargeable battery comprising the same

A rechargeable battery, comprising:

• an electrode assembly consisting of a separator between a positive electrode and a negative electrode;
• and
• a pouch-type case receiving the electrode assembly along with an electrolyte,
• wherein the pouch-type case includes a sequentially arranged first resin layer and second resin layer such that the first resin layer directly contacts the second resin layer and the electrode assembly directly contacts an inner surface of the pouch-type case,
• wherein the second resin layer includes a halogenated butyl rubber, the halogenated butyl rubber including a bromo-butyl rubber or a chloro-butyl rubber
• wherein the first resin layer includes polyethylene terephthalate, polybutylene terephthalate, a copolyester, a polycarbonate, or a nylon film,
• wherein a thickness of the second resin layer is 20 μm to 100 μm, and
• wherein the pouch-type case has a multilayer structure in which layers of the multilayer structure do not include a metal layer.