Recovery and Characterization of Copper Oxide from Cu-Foil Waste by Combination Method of Acid Leaching and Precipitation

Lithium ion batteries have been widely applied in portable electronic devices and electric vehicles as high-density energy storage. The significant consumption of lithium ion batteries is outweighed by the threat to the environment of battery waste. Recovery of valuable metals contained in lithium ion batteries, such as Cu foil, is one of the efforts to overcome environmental pollution due to copper metal. The hydrometallurgical method is used in the recovery process, which includes leaching using nitric acid and precipitation using oxalic acid. The material obtained was copper oxide (CuO), which was analyzed using XRD, SEM-EDX, and FTIR to determine the characteristics of the sample. XRD analysis showed that the crystallinity of CuO was in accordance with the database. SEM images confirm the presence of agglomeration and inhomogeneous particle distribution in the samples. FTIR analysis confirmed the formation of the CuO phase, and the EDX results showed the purity of the sample, which consisted of Cu and O elements. Based on the research, CuO was successfully produced from the recovery of Cu Foil waste.