Electrolytic copper foils (ECFs), owing to their excellent mechanical properties and conductivity, have become an indispensable component as an anodic current collector in lithium-ion batteries. ECFs often show texture properties, but the intrinsic relationship between the texture and mechanical properties is rarely reported. The authors find a conspicuous preference for the (100) crystal plane in 6 and 8 μm ultrathin ECFs with high elongation. And certain ECFs even exhibit a positive correlation trend between elongation and the (100) relative texture coefficient. It can be inferred that enhancing the (100) texture contributes to the improvement of the elongation in ECFs. Moreover, the Schmid factor values for the (111), (100), and (110) planes are calculated. The results revealed that the number of slip systems that can be activated under different tensile directions of the (100) plane is the largest, while the number of (110) plane is the least. It implies that under equivalent conditions, ECFs with (100) plane orientation are more prone to undergo plastic deformation, thereby facilitating high elongation. In contrast, the (110) plane orientation contributes to a high tensile strength.

中文翻译：

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超薄电解铜箔(100)晶面取向与伸长率的关系

电解铜箔（ECF）由于其优异的机械性能和导电性，已成为锂离子电池中阳极集流体不可或缺的组成部分。 ECF 通常表现出织构特性，但织构与机械性能之间的内在关系却很少被报道。作者发现，具有高伸长率的 6 和 8 μm 超薄 ECF 明显偏向 (100) 晶面。某些ECF甚至在伸长率和（100）相对织构系数之间表现出正相关趋势。可以推断，增强（100）织构有助于提高ECF的伸长率。此外，计算(111)、(100)和(110)面的施密德因子值。结果表明，(100)面不同拉伸方向下可激活的滑移系数量最多，而(110)面最少。这意味着在同等条件下，具有（100）面取向的ECF更容易发生塑性变形，从而有利于高伸长率。相反，(110)面取向有助于高拉伸强度。