April 23, 2016

...AND CHEAPER...:

Scientists can now make lithium-ion batteries last a lifetime (Lucas Mearian, 4/21/16, Computerworld)

Who says playing around is a waste of time?

Researchers at the University of California at Irvine (UCI) said that's exactly what they were doing when they discovered how to increase the tensile strength of nanowires that could be used to make lithium-ion batteries last virtually forever.

Researchers have pursued using nanowires in batteries for years because the filaments, thousands of times thinner than a human hair, are highly conductive and have a large surface area for the storage and transfer of electrons.

The problem they have encountered, however, is that nanowires are also extremely fragile and don't hold up well to repeated discharging and recharging, known as "cycling." For example, in a typical lithium-ion battery, they expand and grow brittle, which leads to cracking.

UCI doctoral candidate Mya Le Thai solved the brittleness conundrum by coating a gold nanowire in a manganese dioxide shell and encasing the assembly in an electrolyte made of a Plexiglas-like gel. The combination, they said, is reliable and resistant to failure.

Posted by at April 23, 2016 9:03 AM

  

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