Researchers at Monash University have developed a new lithium-sulfur battery design that addresses the environmental concerns and limitations of traditional lithium-sulfur (Li-S) batteries. Li-S batteries have been considered a next-generation energy storage technology with higher theoretical energy density, lower cost, and better environmental compatibility compared to conventional lithium-ion batteries.
The researchers applied a nanoporous ultra glassy permselective Poly(trimethylsilyl)propyne polymer coating (PTMSP) directly to lithium foil, reducing the amount of lithium needed in the battery and improving its performance. The PTMSP polymer coating contains tiny holes that allow lithium ions to move freely while blocking other chemicals that would attack the lithium. This coating also acts as a scaffold for lithium, enhancing its charge and discharge capabilities.
The coated anodes in lab tests exhibited 5.7 times more dense lithium compared to controls, resulting in improved cycling performance and increased capacity retention. Moreover, the new design eliminates the need for nickel or cobalt, reducing the environmental and social costs associated with these minerals.
This breakthrough in lithium-sulfur battery design promises several advantages, including reduced environmental impact, lower cost, and increased energy per unit volume. The development of Li-metal protection technologies, such as this polymer coating, paves the way for the widespread adoption of lithium-sulfur batteries and other lithium metal-based energy storage systems.
Sources:
– Monash University
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