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Lithium-sulfur batteries simplify cathode production for researchers

Lithium-sulfur batteries are approaching mass production. A group of researchers from the Agency for Science, Technology and Research in Singapore have developed a new method for producing cathodes that is simpler than the complex and cumbersome method currently used.

The same researchers believe that this is a promising step towards commercialization and mass production, which is currently still seen as a kind of “chimera” with regard to lithium-sulfur batteries. Researchers at NanoBio Lab (NBL) have developed cathodes for lithium-sulfur batteries using cost-effective materials already available on the market.

Lithium-sulfur batteries have a high energy density compared to lithium-ion batteries and could be a decisive turning point as soon as the design difficulties that occur with cathodes occur, as they could soon replace lithium because they are more efficient. In fact, lithium-sulfur batteries can store ten times more energy than lithium-ion batteries.

The new cathode, which was developed by NBL researchers, has an excellent capacity of up to 1,220 mAh / g. The new cathode can be used in a wide range of applications. This means that a single gram of this material can store 1200 mAh of electrical charge. For comparison, the classic cathode of a lithium-ion battery has a maximum capacity of 140 mAh/g. In addition, this new cathode remains efficient even after 200 charge and discharge cycles of the battery. Especially the repeated charging and discharging of the battery is a problem of lithium-sulfur batteries, a problem that would be overcome with this new cathode.

The new cathode was manufactured with a three-dimensionally interconnected porous nanomaterial that prevents the carbon skeleton from failing when charging the battery. In fact, conventionally produced cathodes collapse during the initial charge and discharge cycle, causing a structural change with a relative reduction in battery performance.

“Our method is industrially scalable and is expected to have a significant impact on the future design of practical lithium sulfur batteries,” says Jackie Y. Ying, a researcher who led the team.

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Janice Walker

Janice Walker is a biologist (having graduated from Prescott College in 2013) and an experienced writer. She currently works as a pharmacist, contributing research and content to during her nights and weekends. During her time at Prescott College she was an active contributor to her student journal and hopes to grow up as a well established, popular science blog.
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Janice Walker

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