Study on the relationship between crystal plane orientation and strength of electrolytic copper foil

For lithium-ion batteries (LIBs), the current collectors are indispensable components for loading electrode materials. The electrolytic copper foils with different tensile strength were selected to study the strengthening mechanism of copper foil. Through refining crystal grains and strengthen the crystal or-ientation of copper foils, the tensile strength can be considerably improved. For normal strength copper foil, the crystal orientation is (200) plane and the average grain size is 1.428 mu m. For high strength and super strength copper, the crystal orientation are both (220) plane, and the average grain sizes are 1.09 mu m and 862 nm. Moreover, the influence mechanism of texture to strength was studied by characterizing the dislocation density of the copper foils. Through which, the dislocations and substructures inside the crystal grains that produced by the release of residual internal stress can be observed, and the deformation of the crystal grains can be hindered during a stretch process. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

This study investigated the strengthening mechanism of copper foils with different tensile strength by refining crystal grains and enhancing crystal orientation. The results showed that for high strength and super strength copper foils, there were changes in crystal orientation and grain size, and the influence mechanism of texture on strength was explored by characterizing dislocation density.