| abstract |
Provided is a battery which can reduce expansion caused by gas emission when stored at high temperature. A secondary battery (1) is constructed such that a flat wound electrode (20) as a power generating element is sandwiched between exterior members (30a, 30b), having adhesion layers (40a, 40b) interposed therebetween. The adhesion layers (40a, 40b) are, for example, two-sided adhesive tapes and have a structure such that adhesive layers are formed on both surfaces of a thin plate-shaped support layer. The support layer is preferably made of polypropylene or polyimide. The adhesion layers (40a, 40b) are composed of maleated polypropylene whose melting point is preferably in a range from 100°C to 200°C, more preferably, in a range from 140°C to 180°C. |