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http://dx.doi.org/10.7844/kirr.2021.30.1.44

A Study on the Synthesis Behavior of Lithium Hydroxide by Type of Precipitant for Lithium Sulfate Recovered from Waste LIB  

Joo, Soyeong (Materials Science and Chemical Engineering Center, Institute for Advanced Engineering (IAE))
Kim, Dae-Guen (Materials Science and Chemical Engineering Center, Institute for Advanced Engineering (IAE))
Byun, Suk-Hyun (SungEel HiTech Co., Ltd.)
Kim, Yong Hwan (Research Institute of Advanced Manufacturing Technology, Korea Institute of Industrial Technology)
Shim, Hyun-Woo (Materials Science and Chemical Engineering Center, Institute for Advanced Engineering (IAE))
Publication Information
Resources Recycling / v.30, no.1, 2021 , pp. 44-52 More about this Journal
Abstract
This study investigated the effect of the type of alkaline precipitant used on the synthesis of lithium hydroxide by examining the behavior of lithium hydroxide produced using lithium sulfate recovered from a waste lithium secondary battery as a raw material. The double-replacement reaction (DRR) process was used to remove the impurities contained in the lithium salt precursor of lithium sulfate and to improve the efficiency of the synthesis of lithium hydroxide. The experiment was conducted by control the molar ratio of the precursor ([Li]/[OH]), the reaction temperature, and the composition of the alkaline precipitant (KOH, Ca(OH)2, Ba(OH)2) used for the production of highly-crystalline lithium hydroxide. A secondary solid-liquid separation was performed following the reaction to remove the impurities generated, and the purified aqueous solution of lithium hydroxide was evaporated to remove the moisture and obtain the product as a powder. The crystallinity and synthesis behavior of the product were examined.
Keywords
Lithium hydroxide; Waste LIB battery; Lithium sulfate; Alkaline precipitant;
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