South Korean research instititute presents new lithium battery

A research team from the Korean DGIST Division of Energy & Environmental Technology, led by Principal Researcher Kim Jae-hyun, has developed a lithium metal battery using a triple-layer solid polymer electrolyte, claiming greatly enhanced fire safety and an extended lifespan.

A research team from Korea’s Daegu Gyeongbuk Institute of Science and Technology (DGIST) has developed a lithium-metal battery for electric vehicles and other applications with a ‘three-layer solid polymer electrolyte’ that is designed to offer significantly improved fire protection and a longer service life.

The researchers developed a three-layer structure for the electrolyte, each of which fulfils a specific function and is intended to significantly improve the safety and efficiency of the battery.

As the researchers write; “The triple-layer solid electrolyte features a robust middle layer that boosts the battery’s mechanical strength, while its soft outer surface ensures an excellent electrode contact, facilitating an easy movement of lithium ions. This enables a faster movement of lithium ions, enhancing energy transfer rates and preventing dendrite formation effectively.”

Following an extensive testing phase covering 1,000 charging and discharging cycles, the battery was found to retain about 87.9 per cent of its performance capacity. Typical lithium batteries only retain between 70 and 80 per cent of their capacity over such a period, marking a significant improvement.

Speaking about his project, lead researcher Dr Kim said: “This research is anticipated to make a significant contribution to the commercialization of lithium metal batteries using [solid polymer] electrolytes, while providing enhanced stability and efficiency [to] energy storage devices.”

 

dgist.ac.kr

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