Singapore scientists from NanoBio Lab (NBL) of A*STAR have developed a brand-new approach to prepare and develop the next-generation lithium-sulfur cathodes, which simplifies the typically time-consuming and complicated process for producing them used now. This represents a promising step towards the commercialization of lithium-sulfur batteries that are in the trend now and addresses the industry's need for a practical approach towards scaling up the production of new materials that improve battery performance which is essential to the electric vehicles.
While the lithium-ion battery is widely recognized as an advanced technology that can efficiently power modern communication devices its use has been debated, it has drawbacks such as limited storage volume and security matters due to its intrinsic electrochemical instability. This is set to change with a new simplified technique developed by NBL's team of researchers, in the development of lithium-sulfur cathodes from inexpensive commercially available materials. Sulfur's high theoretical energy density, low cost, and abundance contribute to the popularity of lithium-sulfur battery but still in developmental stages and will take years to develop systems as a potential replacement for lithium-ion batteries.
Theoretically, lithium-sulfur batteries are capable of storing up to 10 times more energy than lithium-ion ones, but to date are unable to sustain this over repeated charging and discharging of the battery. NBL's lithium-sulfur cathode demonstrated an excellent specific capacity of up to 1,220 mAh/g, which means that 1 gram of this material could store a charge of 1,220 mAh. In contrast, a typical lithium-ion cathode has a specific energy uniquely stored capacity of 140 mAh/g. In addition, NBL's cathode could maintain its high capacity over 200 charging cycles with minimal loss in performance
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