The surface roughness of aluminum foil can affect its performance in a number of ways, including:
?Electrochemical performance
Lower surface roughness, or fewer grain boundaries, can improve electrochemical performance.
?Adhesion and bonding
Rougher surfaces provide more area for adhesives and paint to stick to, which can increase adhesion and bond strength.?However, too much roughness can decrease the overall contact area and trap air at the interface.?
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Reflectivity
Rougher aluminum sheets have lower total reflectivity and higher diffuse reflectivity.?
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Stripes
Stripes left on aluminum foil by the rolling process can orient reflected light and make it non-isotropic.?
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Lithium-ion battery performance
Too much roughness on the collector's metal foil can increase the resistance of the active materials, which reduces the battery's overall electric capacity.?
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