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http://dx.doi.org/10.7844/kirr.2019.28.4.30

Recoverty of Lithium Carbonate and Nickel from Cathode Active Material LNO(Li2NiO2) of Precursor Process Byproducts  

Pyo, Je-Jung (L&F Co., Ltd.)
Wang, Jei-Pil (Department of Metallurgical Engineering, Pukyong National University)
Publication Information
Resources Recycling / v.28, no.4, 2019 , pp. 30-36 More about this Journal
Abstract
In this study, Li powder was recovered from the by-product of LNO ($Li_2NiO_2$) process, which is the positive electrode active material of waste lithium ion battery, through the $CO_2$ thermal reaction process. In the process of recovering Li powder, the $CO_2$ injection amount is 300 cc/min. The $Li_2NiO_2$ award was phase-separated into the $Li_2CO_3$ phase and the NiO phase by holding at $600^{\circ}C$ for 1 min. After this, the collected sample:distilled water = 1:50 weight ratio, and after leaching, the solution was subjected to vacuum filtration to recover $Li_2CO_3$ from the solution, and the NiO powder was recovered. In order to increase the purity of Ni, it was maintained in $H_2$ atmosphere for 3 hours to reduce NiO to Ni. Through the above-mentioned steps, the purity of Li was 2290 ppm and the recovery was 92.74% from the solution, and Ni was finally produced 90.1% purity, 92.6% recovery.
Keywords
A waste lithium ion battery; LNO; $CO_2$ heat response; Lithium carbonate; Nickel;
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