Electrochemical and bioleaching methods in battery recycling
Luu, Thi Hong Ha (2023)
2023
All rights reserved. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2023053116570
https://urn.fi/URN:NBN:fi:amk-2023053116570
Tiivistelmä
The need to recycle lithium-ion batteries increase dramatically due to economic and environmental protection. Different methods are applied in the industries such as hydrometallurgy and pyro-metallurgy. Meanwhile, more researches on different techniques has been conducted. In this writing thesis, the methods of electrochemical electrochemistry and bioleaching in battery recycling are discussed.
Bioleaching is a technique that uses microbe organisms for leaching directly, indirectly and leaching by fungi. Different factors that affect the bioleaching process are also analysed. The advantages of bioleaching are mentioned as environmentally friendly and cost-saving techniques. However, this technique also has several challenges such as slow process chemical kinetics, the low ratio from solid to liquid, and metal toxicity. The efficiency of the LIB bioleaching process depends on the ability of microorganisms in tolerating toxic metals, metabolite production, the microbe’s cultivation of low-cost nutrients, and the optimization of kinetics.
Electrochemical method is the technique that uses current in which the ions lithium ions are removed (immobilized) out of a feed stream depending on the charge of the electrodes. The thesis writing describes an experiment extracting lithium from the wasted battery, also the parameters of the electrochemical process are mentioned. This electrochemical technique can save costs by not using chemical materials. Still, the technique also has challenges regarding the complicated system set-ting up and the requirement of solid electrolytes, and it is still on a laboratory scale.
Bioleaching is a technique that uses microbe organisms for leaching directly, indirectly and leaching by fungi. Different factors that affect the bioleaching process are also analysed. The advantages of bioleaching are mentioned as environmentally friendly and cost-saving techniques. However, this technique also has several challenges such as slow process chemical kinetics, the low ratio from solid to liquid, and metal toxicity. The efficiency of the LIB bioleaching process depends on the ability of microorganisms in tolerating toxic metals, metabolite production, the microbe’s cultivation of low-cost nutrients, and the optimization of kinetics.
Electrochemical method is the technique that uses current in which the ions lithium ions are removed (immobilized) out of a feed stream depending on the charge of the electrodes. The thesis writing describes an experiment extracting lithium from the wasted battery, also the parameters of the electrochemical process are mentioned. This electrochemical technique can save costs by not using chemical materials. Still, the technique also has challenges regarding the complicated system set-ting up and the requirement of solid electrolytes, and it is still on a laboratory scale.