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http://dx.doi.org/10.6111/JKCGCT.2021.31.2.089

A study on the pyrolysis of lithium carbonate for conversion of lithium hydroxide from lithium carbonate  

Park, Jae Eun (Department of Material Science & Engineering, Pukyong National University)
Park, Min Hwa (Department of Material Science & Engineering, Pukyong National University)
Seo, Hyeong Jun (Department of Material Science & Engineering, Pukyong National University)
Kim, Tae Seong (Department of Material Science & Engineering, Pukyong National University)
Kim, Dae Weon (Institute for Advanced Engineering, Advanced Material & Processing Center)
Kim, Bo Ram (Institute for Advanced Engineering, Advanced Material & Processing Center)
Choi, Hee Lack (Department of Material Science & Engineering, Pukyong National University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.31, no.2, 2021 , pp. 89-95 More about this Journal
Abstract
Research on the production of lithium hydroxide (LiOH) has been actively conducted in response to the increasing demand for high nickel-based positive electrode materials for lithium-ion batteries. Herein we studied the conversion of lithium oxide (Li2O) through thermal decomposition of lithium carbonate for the production of lithium hydroxide from lithium carbonate (Li2CO3). The reaction mechanism of lithium carbonate with alumina, quartz and graphite crucible during heat treatment was confirmed. When graphite crucible was used, complete lithium oxide powder was obtained. Based on the TG analysis results, reagent-grade lithium carbonate was heat-treated at 700℃, 900℃ and 1100℃ for various time and atmosphere conditions. XRD analysis showed the produced lithium oxide showed high crystallinity at 1100℃ for 1 hour in a nitrogen atmosphere. In addition, several reagent-grade lithium oxides were reacted at 100℃ to convert to lithium hydroxide. XRD analysis confirmed that lithium hydroxide (LiOH) and lithium hydroxide monohydrate (LiOH·H2O) were produced.
Keywords
Lithium carbonate; Lithium oxide; Thermal decomposition;
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