A look that is to look at the color, red copper is copper, metallic luster is rose red, the surface oxidefilm formed after the purple, it is commonly referred to as copper.
一看即看色泽，紫铜是铜单质，具有玫瑰红色的金属光泽，表面形成氧化膜后呈紫色，故一般称为紫铜。
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The invention also aims to provide a metallic lithium electrode whose surface is covered in a film of metallicoxide particles, as well as a lithium metal-type battery.