Lithium ion secondary battery and method of fabricating thereof

摘要

A lithium ion secondary battery comprises a positive electrode (1), a negative electrode (2) and a separator (7) which contains a Li ion-containing non-aqueous electrolytic solution. Ionic conductivity and adhesion strength are ensured by providing an adhesive resin layer (8) which bonds the positive electrode (1) to the separator (7) and the negative electrode (2) to the separator (7). The adhesive layer (8) includes a mixed phase consisting of an electrolytic solution phase (9), an electrolytic solution containing a polymer gel phase (10) and a polymer solid phase (11).