[ad_1]
AsianScientist (Jan. 4, 2021) – Having gained its inventors the 2019 Nobel Prize for Chemistry, lithium-ion batteries heralded a revolution in wi-fi expertise. Now, a workforce of researchers from Hong Kong have provide you with a novel design for a lithium-sulfur (Li-S) battery with the potential to succeed right now’s lithium-ion batteries. Their research was printed in Nature Nanotechnology.
From smartphones, drones and electrical autos, gadgets powered by Li-ion batteries have turn into ubiquitous in fashionable life. However, Li-S batteries have been proposed as cheaper, greener and but, extra highly effective, options to Li-ion batteries.
After all, Li-S batteries can probably supply an vitality density of over 500 Wh/kg—considerably higher than the Li-ion batteries’ restrict of 300 Wh/kg. This increased vitality density implies that the 400 km driving vary of a Li-ion powered electrical automobile will be doubled if powered as an alternative by Li-S batteries.
Despite the promise of Li-S batteries, one key subject has to this point prevented their commercialization on an industrial scale: the polysulfide shuttle impact. In typical Li-S batteries, sulfur ions or sulfides progressively leak from the cathode and corrode lithium—leading to brief life cycles.
To tackle this subject, a world analysis workforce led by Professor Zhao Tianshou from the Hong Kong University of Science and Technology proposed a novel cathode design with the potential to attain even higher Li-S battery efficiency.
The workforce’s design entails a porous materials that encapsulates sulfur nanoparticles, with quite a few binding websites embedded inside. These websites successfully immobilize and take in the sulfide ions that leak from the cathode, eliminating the shuttle impact and corrosion of lithium. In doing so, the brand new design delivered an elevated vitality density past 300 Wh/kg, with an effectivity of over 95 % for 80 cycles.
“Our novel electrode design concept and the associated breakthrough in performance represent a big step towards the practical use of a next-generation battery that is even more powerful and longer-lasting than today’s lithium-ion batteries,” concluded Zhao.
The article will be discovered at: Zhao et al. (2020) A High-energy and Long-cycling Lithium–sulfur Pouch Cell by way of a Macroporous Catalytic Cathode With Double-end Binding Sites.
———
Source: Hong Kong University of Science and Technology; Photo: Shutterstock.
Disclaimer: This article doesn’t essentially replicate the views of AsianScientist or its employees.
[ad_2]
Source link
