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Study on full element recycling process of retired ternary power lithium battery
Received date: 2022-12-01
Online published: 2023-06-14
The process of extracting Ni，Co and Mn from the filter residue of preferential extraction of lithium from retired ternary power lithium battery was studied.Using extractant（C8H17O）2PO2H（P204） under the following processing conditions such as extraction pH of 3，extraction V（O）∶V（A）=1∶1，extraction time of 15min，extraction order of 3，salt washing V（O）∶V（A）=1∶2，back extraction V（O）∶V（A）=1∶0.5，back extraction time of 15min，back extraction order of 3，the recycling rate of Mn was 98.6%，while the purity of MnSO4 was 99.5%.Using extractant（（C8H17）2PO3H（P507） under the following processing conditions such as extraction pH of 4.5，extraction V（O）∶V（A）=1∶1，extraction time of 10 min，extraction order of 2，salt washing V（O）∶V（A）=1∶2，back extraction V（O）∶V（A）=1∶0.5，back extraction time of 10 min，back extraction order of 2，the recycling rate of Co was 96.5%，while the purity of CoSO4 was 94.9%.After impurities in Mn，Co raffinate were removed with（C8H17）2PO2H（C272） extractant，the recovery rate of Ni was 96.5%，while the purity of NiSO4 was 97.3%.The battery cathode materials was regenerated by the extracted battery raw materials and their crystal structure，physical properties，electrochemical properties were tested.The results showed that the relevant performance indexes of the synthesized cathode materials met the YS/T 798—2021“Lithium nickel cobalt manganese oxide”industry standards and were qualified to enter the battery industry.
LU Junhao . Study on full element recycling process of retired ternary power lithium battery[J]. Inorganic Chemicals Industry, 2023 , 55(6) : 92 -103 . DOI: 10.19964/j.issn.1006-4990.2022-0704
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