The discussion centers on the advancements in Lithium-Sulfur (Li-S) battery technology developed by chemical engineers at Drexel University. They have successfully stabilized monoclinic gamma sulfur on carbon nanofibers, allowing it to be used with carbonate electrolytes without the previously encountered chemical instability. This innovation results in batteries that offer three times the capacity of conventional lithium-ion batteries and can endure over 4,000 recharge cycles. However, it is important to note that this technology is still in the research phase and has not yet been commercialized.
PREREQUISITESResearchers, battery technology developers, and energy storage professionals interested in the latest innovations in lithium-sulfur battery technology and its potential impact on the energy sector.
https://earthwiseradio.org/podcast/lithium-sulfur-batteries/Sulfur has been a desirable alternative for use in lithium-based batteries for quite a while because it is an abundant element and can be extracted in ways that are safe and environmentally friendly. However, previous attempts to create lithium batteries that combine sulfur cathodes and the standard carbonate electrolytes used in lithium-ion batteries have not been successful because of irreversible chemical reactions between intermediate sulfur products and the electrolytes.
A group of chemical engineers at Drexel University has now found a way to introduce sulfur into lithium-ion batteries that solves the stability problem and also has major performance advantages. The new batteries have three times the capacity of conventional lithium-ion batteries, and last more than 4,000 recharges, which is also a substantial improvement.
The new battery technology involves creating a stable form of sulfur called monoclinic gamma sulfur by depositing the sulfur on carbon nanofibers. Previously, this sulfur phase was only observed at high temperatures and was only stable for 20 or 30 minutes. This chemical phase of sulfur does not react with carbonate electrolytes and therefore produces a battery that is chemically stable over time.
It is only a research project so far. Not yet developed into a product, so potential problems are not yet known.HansH said:3 times the capacity and more than 4,000 recharges almost sounds as an ideal solution. So will this become a revolution or is there some problem not mentioned yet?