Study on Roasting for Selective Lithium Leaching of Cathode Active Materials from Spent Lithium-Ion Batteries
Recently, many studies have been conducted on the materialization of spent batteries. In conventional cases, lithium is recovered from an acidic solution through the leaching and separation of valuable metals; however, it is difficult to remove impurities because lithium is recovered in the last ste...
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MDPI AG
2021-08-01
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author | Yeonjae Jung Bongyoung Yoo Sungcheol Park Yonghwan Kim Seongho Son |
author_facet | Yeonjae Jung Bongyoung Yoo Sungcheol Park Yonghwan Kim Seongho Son |
author_sort | Yeonjae Jung |
collection | DOAJ |
description | Recently, many studies have been conducted on the materialization of spent batteries. In conventional cases, lithium is recovered from an acidic solution through the leaching and separation of valuable metals; however, it is difficult to remove impurities because lithium is recovered in the last step. Cathode active materials of lithium-ion batteries comprise oxides with lithium, such as LiNi<sub>x</sub>Co<sub>y</sub>Mn<sub>z</sub>O<sub>2</sub> and LiCoO<sub>2</sub>. Thus, lithium should be converted into a compound that can be leached in deionized water for selective lithium leaching. Recent studies on the leaching and recovery of Li<sub>2</sub>CO<sub>3</sub> through a carbon reduction reaction show low economic efficiency, due to the solubility of Li<sub>2</sub>CO<sub>3</sub> at room temperature being as low as 13 g/L. This paper proposes a method of roasting after nitric acid deposition for selective lithium leaching and recovery to LiNO<sub>3</sub>. Based on experiments involving the varying of the amount of nitric acid, roasting temperature, and solid–liquid ratio, optimal values were found to be dipping in 10 M HNO<sub>3</sub> 2 mL/g, roasting at 275 °C, and deionized water with a solid–liquid ratio of 10 mL/g, respectively. Over 80% Li leaching was possible under these conditions. IC analysis confirmed that the purity was 97% lithium nitrate. |
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spelling | doaj.art-ae155118432c4f15aa7832cc2b0ae6a62023-11-22T14:12:22ZengMDPI AGMetals2075-47012021-08-01119133610.3390/met11091336Study on Roasting for Selective Lithium Leaching of Cathode Active Materials from Spent Lithium-Ion BatteriesYeonjae Jung0Bongyoung Yoo1Sungcheol Park2Yonghwan Kim3Seongho Son4Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, KoreaDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, KoreaHeat & Surface Technology R&D Department, Korea Institute of Industrial Technology, Incheon 21999, KoreaIndustrial Materials Processing R&D Department, Korea Institute of Industrial Technology, Incheon 21999, KoreaHeat & Surface Technology R&D Department, Korea Institute of Industrial Technology, Incheon 21999, KoreaRecently, many studies have been conducted on the materialization of spent batteries. In conventional cases, lithium is recovered from an acidic solution through the leaching and separation of valuable metals; however, it is difficult to remove impurities because lithium is recovered in the last step. Cathode active materials of lithium-ion batteries comprise oxides with lithium, such as LiNi<sub>x</sub>Co<sub>y</sub>Mn<sub>z</sub>O<sub>2</sub> and LiCoO<sub>2</sub>. Thus, lithium should be converted into a compound that can be leached in deionized water for selective lithium leaching. Recent studies on the leaching and recovery of Li<sub>2</sub>CO<sub>3</sub> through a carbon reduction reaction show low economic efficiency, due to the solubility of Li<sub>2</sub>CO<sub>3</sub> at room temperature being as low as 13 g/L. This paper proposes a method of roasting after nitric acid deposition for selective lithium leaching and recovery to LiNO<sub>3</sub>. Based on experiments involving the varying of the amount of nitric acid, roasting temperature, and solid–liquid ratio, optimal values were found to be dipping in 10 M HNO<sub>3</sub> 2 mL/g, roasting at 275 °C, and deionized water with a solid–liquid ratio of 10 mL/g, respectively. Over 80% Li leaching was possible under these conditions. IC analysis confirmed that the purity was 97% lithium nitrate.https://www.mdpi.com/2075-4701/11/9/1336cathode active materialsselective lithium leachingroasting |
spellingShingle | Yeonjae Jung Bongyoung Yoo Sungcheol Park Yonghwan Kim Seongho Son Study on Roasting for Selective Lithium Leaching of Cathode Active Materials from Spent Lithium-Ion Batteries Metals cathode active materials selective lithium leaching roasting |
title | Study on Roasting for Selective Lithium Leaching of Cathode Active Materials from Spent Lithium-Ion Batteries |
title_full | Study on Roasting for Selective Lithium Leaching of Cathode Active Materials from Spent Lithium-Ion Batteries |
title_fullStr | Study on Roasting for Selective Lithium Leaching of Cathode Active Materials from Spent Lithium-Ion Batteries |
title_full_unstemmed | Study on Roasting for Selective Lithium Leaching of Cathode Active Materials from Spent Lithium-Ion Batteries |
title_short | Study on Roasting for Selective Lithium Leaching of Cathode Active Materials from Spent Lithium-Ion Batteries |
title_sort | study on roasting for selective lithium leaching of cathode active materials from spent lithium ion batteries |
topic | cathode active materials selective lithium leaching roasting |
url | https://www.mdpi.com/2075-4701/11/9/1336 |
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