2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 10: Mineral & Secondary Battery
| Editors: | Kongoli F, Silva AC, Arol AI, Kumar V, Aifantis K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 340 pages |
| ISBN: | 978-1-987820-33-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Thermodynamic Study of Leaching of Active Mass from Spent Li-Ion Batteries
Zita Takacova1; Tomas Havlik2;1TECHNICAL UNIVERSITY OF KOSICE, 04200, Slovakia (Slovak Republic); 2TECHNICAL UNIVERSITY OF KOSICE, FACULTY OF METALLURGY,, Kosice, Slovakia (Slovak Republic);
Type of Paper: Regular
Id Paper: 215
Topic: 14
Abstract:
The work deals with the thermodynamics of leaching of the active mass from spent Li-ion batteries (LiBs) in acidic media - in sulfuric acid and hydrochloric acid. The active mass contains oxide phases of cobalt, lithium, manganese and nickel in the form of LiCoO2, LiNiO2, LiMn2O4, graphite and others. In the active mass, other phases of cobalt and lithium can be present as a result of decomposition of the constituents during the discharge or overcharging of LiBs in their life cycle. Thermodynamic study was carried out by software HSC Chemistry 6.1. I”Go was calculated for the predicted chemical reactions in the temperature range 20-80 A°C and E-pH diagrams were constructed. It was found that I”G0 reached the negative values almost for all reactions in the monitored temperature range in both of leaching media. It means that the expected chemical reactions can proceed during the leaching in the direction of product formation. For the design of E-pH diagrams, the acidic pH range was considered. According to the E-pH diagrams, cobalt is present in ionic form in both leaching agents throughout the whole water stability area to the pH ~ 5-7, depending on the temperature. At higher pH, cobalt can precipitate from solution as CoSO4.7H2O (only in sulfate medium) or Co(OH)2. Lithium is present in ionic form throughout the whole water stability area in the whole acid pH range. Thermodynamic study confirmed the viability of cobalt and lithium leaching from spent LiBs in the sulfuric acid and hydrochloric acid as well.
Keywords:
Dynamics; Li-Ion; Lithium; Recycling; SecondaryBattery; Technology;References:
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