Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.238
Publication date: 18th December 2023
The shift towards an energy mix with more renewable sources have resulted in massive quantities of solar photovoltaics being installed over the worls. This is a growing electronic waste stream that needs to be planned for. Present appropaches to solar recycling involve high-temperature burning for separation and release of the PV cells for metal recovery processes. However, such processes can release gaseous by-products that can cause serious health and environmental issues as well as deprioritises the recovery of pure silicon. This talk will cover our group's efforts in developing new extraction techniques that eschew burning as well as incorporate green solvents. Through an incorporation of such novel techniques along with hydrometallurgy, we demonstrate separation of glass, extraction of the various metallic elements such as Ag, Cu and Al as well as silicon at good purity levels. Our efforts in upcycling the extracted elements into other products such as thermoelectrics as well as battery anodes will also be described.
This research is supported by the National Research Foundation, Singapore, and the National Environment Agency, Singapore under its Closing the Resource Loop Funding Initiative (Award No. CTRL-2023-1D-01).
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