The research team at the Tsinghua Shenzhen International Graduate School has achieved a remarkable breakthrough in the realm of lithium-sulfur batteries, with their findings published in the esteemed journal Nature. At present, the energy density of lithium-ion batteries is approaching its upper limit. While lithium-sulfur batteries boast a high theoretical energy density and low material costs, they have historically been plagued by challenges such as the easy diffusion of intermediate products and sluggish reaction rates. This time, however, the team utilized a novel approach to screen a unique molecule from 196 possible combinations and incorporated it into the battery, thereby enhancing the efficiency of the sulfur conversion reaction.

The modified lithium-sulfur battery exhibits a 75% decrease in charge transfer impedance, can undergo 800 stable cycles under 1C fast-charging conditions with a capacity retention rate surpassing 80%, and the energy density of the pouch cell reaches an impressive 549Wh/kg, roughly double that of conventional lithium batteries. This accomplishment carries immense significance for low-altitude equipment, effectively mitigating concerns over range limitations. The team emphasized that this molecular design strategy can be extended to other battery systems and recycled materials, and they are committed to furthering the practical application of this technology.