The production process of the lithium-ion battery production line, and will the process cause (gas, water and soil) pollution? As far as the current production process of lithium-ion batteries is concerned, lithium-ion batteries (Li-ion) will not be polluted by (toxic heavy metals).
Let’s start with the battery itself
Of course, this concept is relative, and lead-acid, nickel-chromium batteries, its pollution is very small, there is no heavy metal pollution. However, the environment is definitely harmful (what is chemical not poisonous?).
The electrode material and electrolyte and solvent may be contaminated:
It should be stated again that these are extremely low pollution compared with traditional batteries.
Pole piece production process: In these processes, the domestic mainstream lithium iron phosphate system, or even the ternary system, does not have relatively large pollution. Of course, the ternary system may still have a certain effect with lithium cobalt oxide. Pollutants, such as cobalt, manganese, and nickel, are all heavy metals, but they are relatively environmentally friendly. Among them, lithium iron phosphate is the most environmentally friendly.
The remaining part, in addition to the pollution according to the above-mentioned data, the solvent in the injection is mainly cyclic/chain carbonate or carboxylic acid ester. The most important solute is lithium salt of lithium hexafluorophosphate, and the most important additives are film-forming additives, flame retardant additives, conductive additives, and additives for improving low-temperature discharge. The pollution of the whole process is also good. Of course, chemical agents, without paying attention to their manipulation, will definitely pollute the environment. As for the final packaging and formation, the pollution is even smaller.
Talk about the recovery part
Regarding the lithium cobalt oxide and the ternary system, of course, it is still necessary to recover, after all, it contains heavy metals. However, lithium iron phosphate, except for the internal electrolyte, is not harmful at all. Compared with other batteries, there are no toxic and harmful metal elements and substances such as lead, mercury, and cadmium, so the pollution is relatively small.
However, the substances in waste lithium-ion batteries entering the environment can still cause heavy metal nickel, cobalt pollution (including arsenic), fluorine pollution, organic pollution, dust and acid-base pollution. The electrolyte and conversion products of waste lithium ion batteries, such as LiPF6, LiAsF6, LiCF3S03, HF, P201, etc., solvents and their differentiation and hydrolysis products, such as DME, methanol, formic acid, etc., are all toxic and hazardous substances. Lithium-ion batteries should be sent to a qualified place for unified disposal. Don't throw them away.
