Materials scientists at Nanyang Technological University in Singapore have found a way to prevent internal short circuits, the leading cause of fires in Li-ion batteries.

Billions of Li-ion batteries are produced each year for use in cell phones, laptops, personal mobile devices, and huge batteries in electric vehicles and airplanes.

This global demand for batteries is set to grow, with electric vehicles alone requiring up to 2,700 GWh of Li-ion batteries per year by 2030, equivalent to some 225 billion cell phone batteries.

Even with an estimated failure rate of less than one in a million, in 2020 there were 26 electric-assisted bicycle (PAB) fires and 42 cases of personal mobility device fires in Singapore.

In most Li-ion battery fires, the cause is due to a buildup of lithium deposits known as dendrites (small, wire-like tendrils) that pass through the separator between the positive (cathode) and negative ( anode) of the battery when it charges, causing a short circuit leading to an uncontrolled chemical fire.

To prevent such battery fires, scientists at NTU have invented a patent-pending “anti-shorting layer” that can be easily added inside a Li-ion battery, thus preventing any future short- circuit. circuit to occur during the charging process.

This concept is akin to adding a slice of cheese to a burger meat patty between buns, so the new “anti-short layer” can be quickly adopted in today’s battery manufacturing.

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by ScienceTechnology – ARY NEWS https://ift.tt/3i3pzyT https://ift.tt/2XRW1ha

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