New technology to prevent Li-ion battery fires



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

Billions of lithium-ion batteries are produced annually for use in cell phones, laptops, personal mobile devices, and the giant battery packs of electric vehicles and airplanes.

This global demand for batteries will increase, with electric vehicles alone requiring up to 2,700 GWh of lithium-ion batteries annually by 2030, which corresponds to around 225 billion cell phone batteries.

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

Most lithium-ion battery fires are caused by a build-up of lithium deposits called dendrites (tiny wire-like tendrils) that cross the separator between the battery’s positive (cathode) and negative (anode) electrodes when it does is charged, creating a short circuit that results in an uncontrolled chemical fire.

To prevent such battery fires, NTU scientists have invented a patent-pending “anti-short circuit layer” that can be easily inserted into a lithium-ion battery to prevent future short circuits during the charging process.

This concept is similar to adding a slice of cheese between the rolls to a hamburger meat, so that the new “anti-short layer” can quickly be incorporated into current battery production.

The article New Technologies to Prevent Li-Ion Battery Fires first appeared in ARY NEWS.

from ScienceTechnology – ARY NEWS

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