TY-X2 (Battery Exterior Foil)


TY-X2 is the optimal aluminum foil for use as an exterior material for lithium-ion battery laminated pouches. We have the industry’s number-one track record with world-class, outstanding moldability, residual oil management, and pH management.


Mechanical Strength – Standard Values

Material Thickness(μm) Tensile Strength(N/mm2 Stretch(%)
8079 40 75 or greater 10 or greater
8021 35 85 or greater 9 or greater

Constituent Materials


Alloy Si Fe Cu Mn Mg Zn Ti Others AL
each sum
8079 0.05-0.30 0.7-1.3 0.05(max) 0.10(max) 0.05(max) 0.05(max) Re
8021 0.15(max) 1.2-1.7 0.05(max) 0.05(max) 0.05(max) Re


Often used as an exterior material for the laminated pouches of lithium-ion batteries installed in mobile devices, industrial devices, automobiles, etc.