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Leaching valuable metals from spent lithium-ion batteries using the reducing agent methanol
Lingyu Kong1, Zhaowen Wang1, Zhongning Shi2
1Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang, 110819, China.
Salvaging metals from spent lithium-ion batteries (LIBs) is crucial for sustainability. Using methanol in reductive acid leaching efficiently recovers cobalt and lithium, offering a green alternative.
Area of Science:
- * Materials Science and Engineering
- * Environmental Science and Sustainability
- * Chemical Engineering
Background:
- * Growing demand for lithium-ion batteries (LIBs) leads to resource depletion and environmental concerns.
- * Recycling valuable metals from spent LIBs is essential for sustainable battery development.
- * Current recycling methods require optimization for efficiency and environmental impact.
Purpose of the Study:
- * To investigate the reductive acid leaching of valuable metals from spent LIB cathode materials.
- * To evaluate methanol as a sustainable reducing agent in this process.
- * To determine the leaching kinetics and mechanism for cobalt and lithium recovery.
Main Methods:
- * Reductive acid leaching experiments using sulfuric acid and methanol.
- * Optimization of leaching conditions for maximum metal recovery.
- * Kinetic analysis and mechanistic study of the leaching process.
Main Results:
- * Achieved 99% leaching efficiency for cobalt (Co) and lithium (Li) under optimal conditions.
- * Leaching kinetics are diffusion-controlled, with specific activation energies for Co and Li.
- * Methanol is converted to formic acid, enhancing leaching without side reactions.
Conclusions:
- * Methanol is a highly effective and sustainable reducing agent for recovering valuable metals from spent LIBs.
- * The process is efficient, environmentally friendly, and cost-effective.
- * This method supports the green and sustainable development of battery technologies.
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