AI Article Synopsis
- Researchers developed a method to create new lithium-ion batteries using materials recycled from spent 18650 batteries, focusing on the extraction of lithium iron phosphate (LiFePO) cathodes.
- They employed relatively mild organic acids for leaching metal ions at room temperature, achieving a high extraction efficiency (95%) for lithium and iron, unlike stronger traditional acids.
- The newly synthesized LiFePO cathode demonstrated promising electrochemical performance with capacities of 93 mA h/g and 80 mA h/g at different rates, indicating good stability over cycles.
Article Abstract
We demonstrate the concept of fabricating new lithium ion batteries from recycled spent 18650 lithium ion batteries (LIB). LiFePO cathode was extracted from these spent LIB using combined approach of pre-treatment, mechanical treatment and hydrometallurgical process wherein weak organic acids, such as methyl sulfonic acid (MSA) and p-toluene sulfonic acid (TSA), were employed for the first time for leaching at room temperature of metal ions instead of conventional strong acids. High leaching efficiencies (95%) were obtained for extraction of Li and Fe using these acids from black mass. Reuse of these extracted metal ions is also demonstrated by precipitating them and synthesizing LiFePO cathode. Structural characterization showed the formation of single-phase LiFePO and electrochemical evaluation of this cathode in a LiFePO/Li half-cell exhibited a capacity of 93 mA h/g and 80 mA h/g at 0.2C and 1C rate respectively with good cycle stability.
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| http://dx.doi.org/10.1016/j.jhazmat.2020.123068 | DOI Listing |
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