Hong Kong researchers suggest novel cathode design for Li-S batteries

A staff led by Professor Zhao Tianshou of the Hong Kong College of Science and Know-how has proposed a novel cathode design idea for lithium-sulfur (Li-S) batteries.

Li-S batteries are considered enticing options to Li-ion batteries. They’re recognized for his or her excessive power density, whereas their main element, sulfur, is ample, mild, low cost and environmentally benign.

Li-S batteries can probably provide an power density of over 500 Wh/kg, greater than Li-ion batteries, which at the moment max out round 300 Wh/kg. 

Whereas thrilling outcomes on Li-S batteries have been achieved by researchers worldwide, there may be nonetheless an enormous hole between lab analysis and commercialization of the know-how on an industrial scale. One key situation is the polysulfide shuttle impact of Li-S batteries, which causes progressive leakage of lively materials from the cathode and lithium corrosion, leading to a brief life cycle for the battery. Different challenges embrace decreasing the quantity of electrolyte within the battery whereas sustaining steady efficiency.

To handle these points, Zhao’s staff collaborated with worldwide researchers to suggest a cathode design idea that would obtain good Li-S battery efficiency.

The extremely oriented macroporous host can uniformly accommodate the sulfur whereas ample lively websites are embedded contained in the host to tightly take up the polysulfide, eliminating the shuttle impact and lithium metallic corrosion.

“We’re nonetheless in the midst of primary analysis on this discipline,” Zhao stated. “Nonetheless, our novel electrode design idea and the related breakthrough in efficiency characterize an enormous step in the direction of the sensible use of a next-generation battery that’s much more highly effective and longer-lasting than in the present day’s lithium-ion batteries.”

The brand new analysis was lately printed in Nature Nanotechnology.

Supply: Hong Kong University of Science and Technology