ELEMENT FOR POLYELECTROLYTE, METHOD OF PREPARING ELEMENT FOR POLYELECTROLYTE, METHOD OF PREPARING ELEMENT ROLL FOR POLYELECTROLYTE, ELEMENT ROLL FOR POLYELECTROLYTE, AND METHOD OF PREPARING BATTERY CELL

摘要

PROBLEM TO BE SOLVED: To provide an element for polyelectrolyte, which is excellent in thinning, lamination, and dimension accuracy of package, is suitable for use in battery cell and electrochemical device capable of being simple and lightened in weight, and is greatly excellent in film thickness uniformity, as well as a method of preparing an element for polyelectrolyte, a method of preparing an element roll for polyelectrolyte, an element roll for polyelectrolyte, and a method of preparing a battery. SOLUTION: A method of preparing an element for polyelectrolyte includes applying a reactive resin composition on a support, and if necessary, drying the resulting support, to thereby form a reactive layer, and forming a protective film on a face of the support opposite to the reactive layer. The element for polyelectrolyte obtained by this preparing method is wound in a roll shape to prepare an element roll for polyelectrolyte. This element is laminated on a negative or positive electrode material in such a manner that the reactive layer is adhered to the electrode material.