Packaging material for cell

A packaging material for a cell including a laminate, the laminate comprising:

• a base material layer including a biaxially stretched nylon film that satisfies the following physical properties (i) and (ii):
• (i) the elongation in the width direction (ELTD) is 80 to 120%, and the ratio of the elongation in the flow direction (ELMD) to the elongation in the width direction (ELTD) (ELMD/ELTD) is 1 to 1.25;
• and
• (ii) the tensile strength in the width direction (TSTD) is 280 MPa or more, and the ratio of the tensile strength in the flow direction (TSMD) to the tensile strength in the perpendicular direction (TSTD) (TSMD/TSTD) is 0.75 to 1;
• an adhesive layer laminated over the base material layer;
• a metal layer laminated over the adhesive layer, the metal layer including an aluminum foil having:
• a 0.2% yield strength of 64 to 85 N/mm2 when a tensile test is conducted in a parallel direction with respect to a rolling direction;
• a 0.2% yield strength of 50 to 130 N/mm2 when a tensile test is conducted in a perpendicular direction and a 45° direction with respect to the rolling direction;
• a tensile rupture strength of 102 to 110 N/mm2 when a tensile test is conducted in the parallel direction with respect to the rolling direction;
• a tensile rupture strength of 90 to 124 N/mm2 when a tensile test is conducted in the perpendicular direction and the 45° direction with respect to the rolling direction;
• a tensile rupture elongation of 10 to 13% when a tensile test is conducted in the parallel direction with respect to the rolling direction;
• and
• a sealant layer laminated over the metal layer.