| 摘要 |
PROBLEM TO BE SOLVED: To prevent the functional deterioration of electrolyte by reacting with electrolytic salt and the like on the inside of a battery, and prevent the exertion of adverse influence on a battery characteristic by specifying an unsaturation degree of an adhesive or a pressure sensitive adhesive only to fasten a battery element formed by winding or laminating a positive electrode and a negative electrode through a separator. SOLUTION: An adhesive or a pressure sensitive adhesive on which as an unsaturation degree an iodine value is not more than 10 and/or an unsaturation degree of an NMR method is 0.5[10<-2> mol/g] is used. For example, an independent or mixture of such as a polypropylene oligomer, a polyethylene oligomer, polyisoprene, a trifluorochlorimethyl ethylene-vinylidene fluoride copolymer, and polydimethyl siloxane or a material by blending a pressure sensitive adhesion imparting resin such as a hydrogenation terpene resin and a hydrogenation rosin resin with these are cited. There are used to unseaparadly bind a positive electrode, a negative electrode and a separator of a battery element 1. A pressure sensitive adhesive tape 2 or a sheet where a pressure sensitive adhesive is arranged at least on one surface of a base material, can be obtained. |
