Researchers at the University of Adelaide have made a major breakthrough that could lead to lithium-sulphur batteries capable of fully charging in less than five minutes instead of several hours.
The team led by Professor Shizhang Qiao examined the sulphur reduction reaction that governs the charge-discharge rate of lithium-sulphur batteries. They investigated various carbon-based transition metal electrocatalysts like iron, cobalt, and nickel during this pivotal reaction.
“Reaction rates increased with higher polysulphide concentrations, as polysulphide serves as the reactive intermediates during the sulphur reduction reaction,” Qiao, an ARC Australian Laureate Fellow, said.
The researchers designed a nanocomposite electrocatalyst comprising a carbon material and cobalt-zinc clusters. When used in a lithium-sulphur battery, this electrocatalyst achieved an exceptional power-to-weight ratio of 26,120 watts per kilogram of sulphur.
“Our research shows a significant advancement, enabling lithium-sulphur batteries to achieve full charge/discharge in less than five minutes,” Qiao said.
According to University of Adelaide, current lithium-sulphur batteries suffer from slow charge rates, typically requiring one to ten hours for a full charge cycle. The new findings published in Nature Nanotechnology provide the first comprehensive solution to this problem.
“Our breakthrough has the potential to revolutionise energy storage technologies and advance high-performance battery systems for various applications,” Qiao said.
The high-power capabilities make these next-gen lithium-sulphur batteries well-suited for applications like electric vehicles and consumer electronics that require rapid charging and discharging. They could also enhance large-scale energy storage for grid applications.
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