Process and its products for spent lithium-ion batteries treatment

A process of spent lithium-ion batteries treatment, wherein features comprise:

• discharging spent lithium-ion batteries to obtain discharged spent lithium-ion batteries;
• crushing said spent lithium-ion batteries to obtain said crushed products of spent lithium-ion batteries;
• screening said crushed products of spent lithium-ion batteries by screens to obtain an overflow and an underflow;
• sorting said overflow to obtain separator products, plastic products, iron products, copper foil products and aluminum foil products;
• mechanochemically activating said underflow to obtain activated products;
• acid leaching said activated products by degradable organic acid to obtain a mixture containing leached activated products and the organic acid leaching solution;
• filtering the mixture which contains the leached activated products and the organic acid leaching solution to obtain graphite as filter residues;
• putting said aluminum foil products into said organic acid leaching solution to conduct purification and transformation, causing a displacement reaction, resulting in a mixture of flocculated pure copper mud products and purified leaching solution;
• and
• filtering said mixture of flocculated pure copper mud products and purified leaching solution, then obtaining flocculated pure copper mud products as filter residues and purified leaching solution as filtrate, wherein the purified leaching solution further comprising:
• determining the content of nickel ions and cobalt ions of the purified leaching solution by element quantitative analysis firstly, and adding cobalt acetate and nickel acetate according to stoichiometric ratio determined by the element quantitative analysis, controlling pH value between 12±0.1 by adding NaOH and ammonia solution, precipitating after stirring for 2 hours, finally obtaining lithium-rich solution and Ni0.85Co0.1Al0.05(OH)2 solid precipitation by filter separation.