Analysis of the recycling value of discarded lithium-ion batteries
Lithium-ion batteries mainly rely on the embedding and escape of lithium ions in positive and negative electrode materials to transfer energy. Depending on the applicable equipment and location, lithium-ion batteries have cylindrical, long and square shapes, but all contain the following five parts: positive electrode, negative electrode, electrolyte, organic separator, and shell. Taking the common 1860 cylindrical lithium-ion battery as an example, the internal structure of the battery is that the positive electrode, organic separator, negative electrode and organic separator are arranged in sequence, and are wound and pressed around the central axis of the battery. The positive electrode generally uses aluminum foil as the matrix, and the positive electrode material is evenly coated on both sides of the aluminum foil, including a certain ratio of positive active material, conductive agent (such as acetylene black PP/PE, etc.) and binder (such as polyvinylidene disulfide (PVDF)). The positive active material generally uses lithium intercalation compounds, such as lithium cobalt oxide (LiCo02), lithium phosphate (LiFePO4), lithium nickel oxide (LINiO2) and lithium manganese oxide (LiMn204). The negative electrode is generally made of copper foil as the matrix, and the two sides of the copper foil are coated with negative electrode materials, including a certain...
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